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/* |
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* %W% %E% |
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* |
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* Copyright 2004 Sun Microsystems, Inc. All rights reserved. |
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* Copyright 2006 Sun Microsystems, Inc. All rights reserved. |
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* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. |
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*/ |
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package java.util; |
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package java.util; |
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/** |
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* Red-Black tree based implementation of the <tt>NavigableMap</tt> interface. |
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* This class guarantees that the map will be in ascending key order, sorted |
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* according to the <i>natural order</i> for the key's class (see |
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* <tt>Comparable</tt>), or by the comparator provided at creation time, |
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* depending on which constructor is used.<p> |
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* A Red-Black tree based {@link NavigableMap} implementation. |
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* The map is sorted according to the {@linkplain Comparable natural |
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* ordering} of its keys, or by a {@link Comparator} provided at map |
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* creation time, depending on which constructor is used. |
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* |
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* This implementation provides guaranteed log(n) time cost for the |
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* <p>This implementation provides guaranteed log(n) time cost for the |
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* <tt>containsKey</tt>, <tt>get</tt>, <tt>put</tt> and <tt>remove</tt> |
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* operations. Algorithms are adaptations of those in Cormen, Leiserson, and |
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* Rivest's <I>Introduction to Algorithms</I>.<p> |
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* Rivest's <I>Introduction to Algorithms</I>. |
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* |
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* Note that the ordering maintained by a sorted map (whether or not an |
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* <p>Note that the ordering maintained by a sorted map (whether or not an |
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* explicit comparator is provided) must be <i>consistent with equals</i> if |
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* this sorted map is to correctly implement the <tt>Map</tt> interface. (See |
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* <tt>Comparable</tt> or <tt>Comparator</tt> for a precise definition of |
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* method, so two keys that are deemed equal by this method are, from the |
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* standpoint of the sorted map, equal. The behavior of a sorted map |
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* <i>is</i> well-defined even if its ordering is inconsistent with equals; it |
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* just fails to obey the general contract of the <tt>Map</tt> interface.<p> |
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* just fails to obey the general contract of the <tt>Map</tt> interface. |
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* |
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* <b>Note that this implementation is not synchronized.</b> If multiple |
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* threads access a map concurrently, and at least one of the threads modifies |
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* the map structurally, it <i>must</i> be synchronized externally. (A |
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* structural modification is any operation that adds or deletes one or more |
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* mappings; merely changing the value associated with an existing key is not |
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* a structural modification.) This is typically accomplished by |
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* synchronizing on some object that naturally encapsulates the map. If no |
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* such object exists, the map should be "wrapped" using the |
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* <tt>Collections.synchronizedMap</tt> method. This is best done at creation |
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* time, to prevent accidental unsynchronized access to the map: |
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* <pre> |
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* Map m = Collections.synchronizedMap(new TreeMap(...)); |
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* </pre><p> |
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* <p><strong>Note that this implementation is not synchronized.</strong> |
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* If multiple threads access a map concurrently, and at least one of the |
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* threads modifies the map structurally, it <i>must</i> be synchronized |
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* externally. (A structural modification is any operation that adds or |
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* deletes one or more mappings; merely changing the value associated |
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* with an existing key is not a structural modification.) This is |
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* typically accomplished by synchronizing on some object that naturally |
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* encapsulates the map. |
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* If no such object exists, the map should be "wrapped" using the |
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* {@link Collections#synchronizedSortedMap Collections.synchronizedSortedMap} |
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* method. This is best done at creation time, to prevent accidental |
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* unsynchronized access to the map: <pre> |
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* SortedMap m = Collections.synchronizedSortedMap(new TreeMap(...));</pre> |
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* |
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* The iterators returned by all of this class's "collection view methods" are |
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* <p>The iterators returned by the <tt>iterator</tt> method of the collections |
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* returned by all of this class's "collection view methods" are |
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* <i>fail-fast</i>: if the map is structurally modified at any time after the |
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* iterator is created, in any way except through the iterator's own |
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* <tt>remove</tt> or <tt>add</tt> methods, the iterator throws a |
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* <tt>ConcurrentModificationException</tt>. Thus, in the face of concurrent |
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* <tt>remove</tt> method, the iterator will throw a {@link |
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* ConcurrentModificationException}. Thus, in the face of concurrent |
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* modification, the iterator fails quickly and cleanly, rather than risking |
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* arbitrary, non-deterministic behavior at an undetermined time in the |
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* future. |
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* arbitrary, non-deterministic behavior at an undetermined time in the future. |
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* |
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* <p>Note that the fail-fast behavior of an iterator cannot be guaranteed |
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* as it is, generally speaking, impossible to make any hard guarantees in the |
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* <a href="{@docRoot}/../guide/collections/index.html"> |
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* Java Collections Framework</a>. |
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* |
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* @param <K> the type of keys maintained by this map |
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* @param <V> the type of mapped values |
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* |
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* @author Josh Bloch and Doug Lea |
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* @version %I%, %G% |
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* @see Map |
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* @see Comparable |
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* @see Comparator |
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* @see Collection |
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* @see Collections#synchronizedMap(Map) |
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* @since 1.2 |
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*/ |
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|
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implements NavigableMap<K,V>, Cloneable, java.io.Serializable |
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{ |
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/** |
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* The Comparator used to maintain order in this TreeMap, or |
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* null if this TreeMap uses its elements natural ordering. |
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* The comparator used to maintain order in this tree map, or |
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* null if it uses the natural ordering of its keys. |
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* |
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* @serial |
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*/ |
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private Comparator<? super K> comparator = null; |
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private final Comparator<? super K> comparator; |
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private transient Entry<K,V> root = null; |
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private void decrementSize() { modCount++; size--; } |
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/** |
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* Constructs a new, empty map, sorted according to the keys' natural |
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* order. All keys inserted into the map must implement the |
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* <tt>Comparable</tt> interface. Furthermore, all such keys must be |
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* <i>mutually comparable</i>: <tt>k1.compareTo(k2)</tt> must not throw a |
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* ClassCastException for any elements <tt>k1</tt> and <tt>k2</tt> in the |
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* map. If the user attempts to put a key into the map that violates this |
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* constraint (for example, the user attempts to put a string key into a |
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* map whose keys are integers), the <tt>put(Object key, Object |
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* value)</tt> call will throw a <tt>ClassCastException</tt>. |
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* |
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* @see Comparable |
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* Constructs a new, empty tree map, using the natural ordering of its |
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* keys. All keys inserted into the map must implement the {@link |
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* Comparable} interface. Furthermore, all such keys must be |
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* <i>mutually comparable</i>: <tt>k1.compareTo(k2)</tt> must not throw |
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* a <tt>ClassCastException</tt> for any keys <tt>k1</tt> and |
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* <tt>k2</tt> in the map. If the user attempts to put a key into the |
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* map that violates this constraint (for example, the user attempts to |
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* put a string key into a map whose keys are integers), the |
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* <tt>put(Object key, Object value)</tt> call will throw a |
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* <tt>ClassCastException</tt>. |
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*/ |
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public TreeMap() { |
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comparator = null; |
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} |
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/** |
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* Constructs a new, empty map, sorted according to the given comparator. |
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* All keys inserted into the map must be <i>mutually comparable</i> by |
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* the given comparator: <tt>comparator.compare(k1, k2)</tt> must not |
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* throw a <tt>ClassCastException</tt> for any keys <tt>k1</tt> and |
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* <tt>k2</tt> in the map. If the user attempts to put a key into the |
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* map that violates this constraint, the <tt>put(Object key, Object |
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* value)</tt> call will throw a <tt>ClassCastException</tt>. |
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* Constructs a new, empty tree map, ordered according to the given |
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* comparator. All keys inserted into the map must be <i>mutually |
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* comparable</i> by the given comparator: <tt>comparator.compare(k1, |
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* k2)</tt> must not throw a <tt>ClassCastException</tt> for any keys |
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* <tt>k1</tt> and <tt>k2</tt> in the map. If the user attempts to put |
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* a key into the map that violates this constraint, the <tt>put(Object |
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* key, Object value)</tt> call will throw a |
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* <tt>ClassCastException</tt>. |
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* |
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* @param c the comparator that will be used to sort this map. A |
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* <tt>null</tt> value indicates that the keys' <i>natural |
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* ordering</i> should be used. |
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*/ |
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public TreeMap(Comparator<? super K> c) { |
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this.comparator = c; |
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* @param comparator the comparator that will be used to order this map. |
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* If <tt>null</tt>, the {@linkplain Comparable natural |
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* ordering} of the keys will be used. |
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*/ |
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public TreeMap(Comparator<? super K> comparator) { |
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this.comparator = comparator; |
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} |
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/** |
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* Constructs a new map containing the same mappings as the given map, |
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* sorted according to the keys' <i>natural order</i>. All keys inserted |
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* into the new map must implement the <tt>Comparable</tt> interface. |
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* Furthermore, all such keys must be <i>mutually comparable</i>: |
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* <tt>k1.compareTo(k2)</tt> must not throw a <tt>ClassCastException</tt> |
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* for any elements <tt>k1</tt> and <tt>k2</tt> in the map. This method |
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* runs in n*log(n) time. |
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* |
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* @param m the map whose mappings are to be placed in this map. |
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* @throws ClassCastException the keys in t are not Comparable, or |
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* are not mutually comparable. |
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* @throws NullPointerException if the specified map is null. |
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* Constructs a new tree map containing the same mappings as the given |
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* map, ordered according to the <i>natural ordering</i> of its keys. |
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* All keys inserted into the new map must implement the {@link |
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* Comparable} interface. Furthermore, all such keys must be |
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* <i>mutually comparable</i>: <tt>k1.compareTo(k2)</tt> must not throw |
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* a <tt>ClassCastException</tt> for any keys <tt>k1</tt> and |
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* <tt>k2</tt> in the map. This method runs in n*log(n) time. |
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* |
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* @param m the map whose mappings are to be placed in this map |
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* @throws ClassCastException if the keys in m are not {@link Comparable}, |
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* or are not mutually comparable |
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* @throws NullPointerException if the specified map is null |
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*/ |
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public TreeMap(Map<? extends K, ? extends V> m) { |
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comparator = null; |
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putAll(m); |
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} |
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/** |
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* Constructs a new map containing the same mappings as the given |
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* <tt>SortedMap</tt>, sorted according to the same ordering. This method |
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* runs in linear time. |
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* Constructs a new tree map containing the same mappings and |
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* using the same ordering as the specified sorted map. This |
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* method runs in linear time. |
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* |
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* @param m the sorted map whose mappings are to be placed in this map, |
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* and whose comparator is to be used to sort this map. |
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* @throws NullPointerException if the specified sorted map is null. |
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* and whose comparator is to be used to sort this map |
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* @throws NullPointerException if the specified map is null |
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*/ |
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public TreeMap(SortedMap<K, ? extends V> m) { |
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comparator = m.comparator(); |
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/** |
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* Returns the number of key-value mappings in this map. |
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* |
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* @return the number of key-value mappings in this map. |
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* @return the number of key-value mappings in this map |
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*/ |
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public int size() { |
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return size; |
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* Returns <tt>true</tt> if this map contains a mapping for the specified |
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* key. |
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* |
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* @param key key whose presence in this map is to be tested. |
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* |
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* @param key key whose presence in this map is to be tested |
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* @return <tt>true</tt> if this map contains a mapping for the |
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* specified key. |
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* @throws ClassCastException if the key cannot be compared with the keys |
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* currently in the map. |
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* @throws NullPointerException if key is <tt>null</tt> and this map uses |
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* natural ordering, or its comparator does not tolerate |
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* <tt>null</tt> keys. |
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* specified key |
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* @throws ClassCastException if the specified key cannot be compared |
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* with the keys currently in the map |
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* @throws NullPointerException if the specified key is null |
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* and this map uses natural ordering, or its comparator |
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* does not permit null keys |
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*/ |
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public boolean containsKey(Object key) { |
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return getEntry(key) != null; |
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* specified value. More formally, returns <tt>true</tt> if and only if |
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* this map contains at least one mapping to a value <tt>v</tt> such |
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* that <tt>(value==null ? v==null : value.equals(v))</tt>. This |
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* operation will probably require time linear in the Map size for most |
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* implementations of Map. |
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* operation will probably require time linear in the map size for |
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* most implementations. |
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* |
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* @param value value whose presence in this Map is to be tested. |
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* @return <tt>true</tt> if a mapping to <tt>value</tt> exists; |
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* <tt>false</tt> otherwise. |
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* @param value value whose presence in this map is to be tested |
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* @return <tt>true</tt> if a mapping to <tt>value</tt> exists; |
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* <tt>false</tt> otherwise |
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* @since 1.2 |
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*/ |
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public boolean containsValue(Object value) { |
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return (root==null ? false : |
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(value==null ? valueSearchNull(root) |
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: valueSearchNonNull(root, value))); |
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: valueSearchNonNull(root, value))); |
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} |
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private boolean valueSearchNull(Entry n) { |
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|
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// Check left and right subtrees for value |
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return (n.left != null && valueSearchNull(n.left)) || |
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(n.right != null && valueSearchNull(n.right)); |
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(n.right != null && valueSearchNull(n.right)); |
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} |
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private boolean valueSearchNonNull(Entry n, Object value) { |
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// Check left and right subtrees for value |
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return (n.left != null && valueSearchNonNull(n.left, value)) || |
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(n.right != null && valueSearchNonNull(n.right, value)); |
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(n.right != null && valueSearchNonNull(n.right, value)); |
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} |
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/** |
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* Returns the value to which this map maps the specified key. Returns |
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* <tt>null</tt> if the map contains no mapping for this key. A return |
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* value of <tt>null</tt> does not <i>necessarily</i> indicate that the |
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* map contains no mapping for the key; it's also possible that the map |
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* explicitly maps the key to <tt>null</tt>. The <tt>containsKey</tt> |
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* operation may be used to distinguish these two cases. |
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* |
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* @param key key whose associated value is to be returned. |
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* @return the value to which this map maps the specified key, or |
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* <tt>null</tt> if the map contains no mapping for the key. |
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* @throws ClassCastException if key cannot be compared with the keys |
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* currently in the map. |
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* @throws NullPointerException if key is <tt>null</tt> and this map uses |
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* natural ordering, or its comparator does not tolerate |
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* <tt>null</tt> keys. |
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* Returns the value to which the specified key is mapped, |
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* or {@code null} if this map contains no mapping for the key. |
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* |
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* @see #containsKey(Object) |
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* <p>More formally, if this map contains a mapping from a key |
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* {@code k} to a value {@code v} such that {@code key} compares |
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* equal to {@code k} according to the map's ordering, then this |
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* method returns {@code v}; otherwise it returns {@code null}. |
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* (There can be at most one such mapping.) |
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* |
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* <p>A return value of {@code null} does not <i>necessarily</i> |
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* indicate that the map contains no mapping for the key; it's also |
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* possible that the map explicitly maps the key to {@code null}. |
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* The {@link #containsKey containsKey} operation may be used to |
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* distinguish these two cases. |
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* |
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* @throws ClassCastException if the specified key cannot be compared |
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* with the keys currently in the map |
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* @throws NullPointerException if the specified key is null |
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* and this map uses natural ordering, or its comparator |
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* does not permit null keys |
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*/ |
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public V get(Object key) { |
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Entry<K,V> p = getEntry(key); |
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return (p==null ? null : p.value); |
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} |
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|
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– |
/** |
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* Returns the comparator used to order this map, or <tt>null</tt> if this |
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* map uses its keys' natural order. |
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* |
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* @return the comparator associated with this sorted map, or |
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* <tt>null</tt> if it uses its keys' natural sort method. |
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*/ |
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public Comparator<? super K> comparator() { |
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return comparator; |
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} |
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|
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/** |
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* Returns the first (lowest) key currently in this sorted map. |
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* |
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* @return the first (lowest) key currently in this sorted map. |
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* @throws NoSuchElementException Map is empty. |
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* @throws NoSuchElementException {@inheritDoc} |
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*/ |
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public K firstKey() { |
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return key(getFirstEntry()); |
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} |
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|
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/** |
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* Returns the last (highest) key currently in this sorted map. |
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* |
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* @return the last (highest) key currently in this sorted map. |
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* @throws NoSuchElementException Map is empty. |
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* @throws NoSuchElementException {@inheritDoc} |
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*/ |
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public K lastKey() { |
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return key(getLastEntry()); |
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} |
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|
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/** |
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* Copies all of the mappings from the specified map to this map. These |
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* mappings replace any mappings that this map had for any of the keys |
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* currently in the specified map. |
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* |
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* @param map mappings to be stored in this map. |
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* @throws ClassCastException class of a key or value in the specified |
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* map prevents it from being stored in this map. |
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* |
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* @throws NullPointerException if the given map is <tt>null</tt> or |
308 |
< |
* this map does not permit <tt>null</tt> keys and a |
318 |
< |
* key in the specified map is <tt>null</tt>. |
299 |
> |
* Copies all of the mappings from the specified map to this map. |
300 |
> |
* These mappings replace any mappings that this map had for any |
301 |
> |
* of the keys currently in the specified map. |
302 |
> |
* |
303 |
> |
* @param map mappings to be stored in this map |
304 |
> |
* @throws ClassCastException if the class of a key or value in |
305 |
> |
* the specified map prevents it from being stored in this map |
306 |
> |
* @throws NullPointerException if the specified map is null or |
307 |
> |
* the specified map contains a null key and this map does not |
308 |
> |
* permit null keys |
309 |
|
*/ |
310 |
|
public void putAll(Map<? extends K, ? extends V> map) { |
311 |
|
int mapSize = map.size(); |
330 |
|
* does not contain an entry for the key. |
331 |
|
* |
332 |
|
* @return this map's entry for the given key, or <tt>null</tt> if the map |
333 |
< |
* does not contain an entry for the key. |
334 |
< |
* @throws ClassCastException if the key cannot be compared with the keys |
335 |
< |
* currently in the map. |
336 |
< |
* @throws NullPointerException if key is <tt>null</tt> and this map uses |
337 |
< |
* natural order, or its comparator does not tolerate * |
338 |
< |
* <tt>null</tt> keys. |
333 |
> |
* does not contain an entry for the key |
334 |
> |
* @throws ClassCastException if the specified key cannot be compared |
335 |
> |
* with the keys currently in the map |
336 |
> |
* @throws NullPointerException if the specified key is null |
337 |
> |
* and this map uses natural ordering, or its comparator |
338 |
> |
* does not permit null keys |
339 |
|
*/ |
340 |
< |
private Entry<K,V> getEntry(Object key) { |
340 |
> |
final Entry<K,V> getEntry(Object key) { |
341 |
|
// Offload comparator-based version for sake of performance |
342 |
|
if (comparator != null) |
343 |
|
return getEntryUsingComparator(key); |
344 |
< |
Comparable<K> k = (Comparable<K>) key; |
344 |
> |
if (key == null) |
345 |
> |
throw new NullPointerException(); |
346 |
> |
Comparable<? super K> k = (Comparable<? super K>) key; |
347 |
|
Entry<K,V> p = root; |
348 |
|
while (p != null) { |
349 |
|
int cmp = k.compareTo(p.key); |
361 |
|
* Version of getEntry using comparator. Split off from getEntry |
362 |
|
* for performance. (This is not worth doing for most methods, |
363 |
|
* that are less dependent on comparator performance, but is |
364 |
< |
* worthwhile here.) |
364 |
> |
* worthwhile for get and put.) |
365 |
|
*/ |
366 |
< |
private Entry<K,V> getEntryUsingComparator(Object key) { |
366 |
> |
final Entry<K,V> getEntryUsingComparator(Object key) { |
367 |
|
K k = (K) key; |
368 |
|
Comparator<? super K> cpr = comparator; |
369 |
|
Entry<K,V> p = root; |
385 |
|
* key; if no such entry exists (i.e., the greatest key in the Tree is less |
386 |
|
* than the specified key), returns <tt>null</tt>. |
387 |
|
*/ |
388 |
< |
private Entry<K,V> getCeilingEntry(K key) { |
388 |
> |
final Entry<K,V> getCeilingEntry(K key) { |
389 |
|
Entry<K,V> p = root; |
390 |
< |
if (p==null) |
399 |
< |
return null; |
400 |
< |
|
401 |
< |
while (true) { |
390 |
> |
while (p != null) { |
391 |
|
int cmp = compare(key, p.key); |
392 |
|
if (cmp < 0) { |
393 |
|
if (p.left != null) |
409 |
|
} else |
410 |
|
return p; |
411 |
|
} |
412 |
+ |
return null; |
413 |
|
} |
414 |
|
|
415 |
|
/** |
417 |
|
* exists, returns the entry for the greatest key less than the specified |
418 |
|
* key; if no such entry exists, returns <tt>null</tt>. |
419 |
|
*/ |
420 |
< |
private Entry<K,V> getFloorEntry(K key) { |
420 |
> |
final Entry<K,V> getFloorEntry(K key) { |
421 |
|
Entry<K,V> p = root; |
422 |
< |
if (p==null) |
433 |
< |
return null; |
434 |
< |
|
435 |
< |
while (true) { |
422 |
> |
while (p != null) { |
423 |
|
int cmp = compare(key, p.key); |
424 |
|
if (cmp > 0) { |
425 |
|
if (p.right != null) |
442 |
|
return p; |
443 |
|
|
444 |
|
} |
445 |
+ |
return null; |
446 |
|
} |
447 |
|
|
448 |
|
/** |
451 |
|
* key greater than the specified key; if no such entry exists |
452 |
|
* returns <tt>null</tt>. |
453 |
|
*/ |
454 |
< |
private Entry<K,V> getHigherEntry(K key) { |
454 |
> |
final Entry<K,V> getHigherEntry(K key) { |
455 |
|
Entry<K,V> p = root; |
456 |
< |
if (p==null) |
469 |
< |
return null; |
470 |
< |
|
471 |
< |
while (true) { |
456 |
> |
while (p != null) { |
457 |
|
int cmp = compare(key, p.key); |
458 |
|
if (cmp < 0) { |
459 |
|
if (p.left != null) |
474 |
|
} |
475 |
|
} |
476 |
|
} |
477 |
+ |
return null; |
478 |
|
} |
479 |
|
|
480 |
|
/** |
482 |
|
* no such entry exists (i.e., the least key in the Tree is greater than |
483 |
|
* the specified key), returns <tt>null</tt>. |
484 |
|
*/ |
485 |
< |
private Entry<K,V> getLowerEntry(K key) { |
485 |
> |
final Entry<K,V> getLowerEntry(K key) { |
486 |
|
Entry<K,V> p = root; |
487 |
< |
if (p==null) |
502 |
< |
return null; |
503 |
< |
|
504 |
< |
while (true) { |
487 |
> |
while (p != null) { |
488 |
|
int cmp = compare(key, p.key); |
489 |
|
if (cmp > 0) { |
490 |
|
if (p.right != null) |
505 |
|
} |
506 |
|
} |
507 |
|
} |
508 |
+ |
return null; |
509 |
|
} |
510 |
|
|
511 |
|
/** |
512 |
< |
* Returns the key corresponding to the specified Entry. Throw |
513 |
< |
* NoSuchElementException if the Entry is <tt>null</tt>. |
512 |
> |
* Returns the key corresponding to the specified Entry. |
513 |
> |
* @throws NoSuchElementException if the Entry is null |
514 |
|
*/ |
515 |
< |
private static <K> K key(Entry<K,?> e) { |
515 |
> |
static <K> K key(Entry<K,?> e) { |
516 |
|
if (e==null) |
517 |
|
throw new NoSuchElementException(); |
518 |
|
return e.key; |
520 |
|
|
521 |
|
/** |
522 |
|
* Associates the specified value with the specified key in this map. |
523 |
< |
* If the map previously contained a mapping for this key, the old |
523 |
> |
* If the map previously contained a mapping for the key, the old |
524 |
|
* value is replaced. |
525 |
|
* |
526 |
< |
* @param key key with which the specified value is to be associated. |
527 |
< |
* @param value value to be associated with the specified key. |
526 |
> |
* @param key key with which the specified value is to be associated |
527 |
> |
* @param value value to be associated with the specified key |
528 |
|
* |
529 |
< |
* @return previous value associated with specified key, or <tt>null</tt> |
530 |
< |
* if there was no mapping for key. A <tt>null</tt> return can |
531 |
< |
* also indicate that the map previously associated <tt>null</tt> |
532 |
< |
* with the specified key. |
533 |
< |
* @throws ClassCastException if key cannot be compared with the keys |
534 |
< |
* currently in the map. |
535 |
< |
* @throws NullPointerException if key is <tt>null</tt> and this map uses |
536 |
< |
* natural order, or its comparator does not tolerate |
537 |
< |
* <tt>null</tt> keys. |
529 |
> |
* @return the previous value associated with <tt>key</tt>, or |
530 |
> |
* <tt>null</tt> if there was no mapping for <tt>key</tt>. |
531 |
> |
* (A <tt>null</tt> return can also indicate that the map |
532 |
> |
* previously associated <tt>null</tt> with <tt>key</tt>.) |
533 |
> |
* @throws ClassCastException if the specified key cannot be compared |
534 |
> |
* with the keys currently in the map |
535 |
> |
* @throws NullPointerException if the specified key is null |
536 |
> |
* and this map uses natural ordering, or its comparator |
537 |
> |
* does not permit null keys |
538 |
|
*/ |
539 |
|
public V put(K key, V value) { |
540 |
< |
Entry<K,V> t = root; |
540 |
> |
// Offload comparator-based version for sake of performance |
541 |
> |
if (comparator != null) |
542 |
> |
return putUsingComparator(key, value); |
543 |
> |
if (key == null) |
544 |
> |
throw new NullPointerException(); |
545 |
> |
Comparable<? super K> k = (Comparable<? super K>) key; |
546 |
|
|
547 |
< |
if (t == null) { |
548 |
< |
incrementSize(); |
549 |
< |
root = new Entry<K,V>(key, value, null); |
550 |
< |
return null; |
551 |
< |
} |
547 |
> |
Entry<K,V> t = root; |
548 |
> |
while (t != null) { |
549 |
> |
int cmp = k.compareTo(t.key); |
550 |
> |
if (cmp == 0) { |
551 |
> |
return t.setValue(value); |
552 |
> |
} else if (cmp < 0) { |
553 |
> |
if (t.left != null) { |
554 |
> |
t = t.left; |
555 |
> |
} else { |
556 |
> |
incrementSize(); |
557 |
> |
fixAfterInsertion(t.left = new Entry<K,V>(key, value, t)); |
558 |
> |
return null; |
559 |
> |
} |
560 |
> |
} else { // cmp > 0 |
561 |
> |
if (t.right != null) { |
562 |
> |
t = t.right; |
563 |
> |
} else { |
564 |
> |
incrementSize(); |
565 |
> |
fixAfterInsertion(t.right = new Entry<K,V>(key, value, t)); |
566 |
> |
return null; |
567 |
> |
} |
568 |
> |
} |
569 |
> |
} |
570 |
> |
incrementSize(); |
571 |
> |
root = new Entry<K,V>(key, value, null); |
572 |
> |
return null; |
573 |
> |
} |
574 |
|
|
575 |
< |
while (true) { |
576 |
< |
int cmp = compare(key, t.key); |
575 |
> |
/** |
576 |
> |
* Version of put using comparator. Split off from put for |
577 |
> |
* performance. |
578 |
> |
*/ |
579 |
> |
final V putUsingComparator(K key, V value) { |
580 |
> |
Comparator<? super K> cpr = comparator; |
581 |
> |
Entry<K,V> t = root; |
582 |
> |
while (t != null) { |
583 |
> |
int cmp = cpr.compare(key, t.key); |
584 |
|
if (cmp == 0) { |
585 |
|
return t.setValue(value); |
586 |
|
} else if (cmp < 0) { |
588 |
|
t = t.left; |
589 |
|
} else { |
590 |
|
incrementSize(); |
591 |
< |
t.left = new Entry<K,V>(key, value, t); |
574 |
< |
fixAfterInsertion(t.left); |
591 |
> |
fixAfterInsertion(t.left = new Entry<K,V>(key, value, t)); |
592 |
|
return null; |
593 |
|
} |
594 |
|
} else { // cmp > 0 |
596 |
|
t = t.right; |
597 |
|
} else { |
598 |
|
incrementSize(); |
599 |
< |
t.right = new Entry<K,V>(key, value, t); |
583 |
< |
fixAfterInsertion(t.right); |
599 |
> |
fixAfterInsertion(t.right = new Entry<K,V>(key, value, t)); |
600 |
|
return null; |
601 |
|
} |
602 |
|
} |
603 |
|
} |
604 |
+ |
cpr.compare(key, key); // type check |
605 |
+ |
incrementSize(); |
606 |
+ |
root = new Entry<K,V>(key, value, null); |
607 |
+ |
return null; |
608 |
|
} |
609 |
|
|
610 |
|
/** |
611 |
|
* Removes the mapping for this key from this TreeMap if present. |
612 |
|
* |
613 |
|
* @param key key for which mapping should be removed |
614 |
< |
* @return previous value associated with specified key, or <tt>null</tt> |
615 |
< |
* if there was no mapping for key. A <tt>null</tt> return can |
616 |
< |
* also indicate that the map previously associated |
617 |
< |
* <tt>null</tt> with the specified key. |
618 |
< |
* |
619 |
< |
* @throws ClassCastException if key cannot be compared with the keys |
620 |
< |
* currently in the map. |
621 |
< |
* @throws NullPointerException if key is <tt>null</tt> and this map uses |
622 |
< |
* natural order, or its comparator does not tolerate |
603 |
< |
* <tt>null</tt> keys. |
614 |
> |
* @return the previous value associated with <tt>key</tt>, or |
615 |
> |
* <tt>null</tt> if there was no mapping for <tt>key</tt>. |
616 |
> |
* (A <tt>null</tt> return can also indicate that the map |
617 |
> |
* previously associated <tt>null</tt> with <tt>key</tt>.) |
618 |
> |
* @throws ClassCastException if the specified key cannot be compared |
619 |
> |
* with the keys currently in the map |
620 |
> |
* @throws NullPointerException if the specified key is null |
621 |
> |
* and this map uses natural ordering, or its comparator |
622 |
> |
* does not permit null keys |
623 |
|
*/ |
624 |
|
public V remove(Object key) { |
625 |
|
Entry<K,V> p = getEntry(key); |
632 |
|
} |
633 |
|
|
634 |
|
/** |
635 |
< |
* Removes all mappings from this TreeMap. |
635 |
> |
* Removes all of the mappings from this map. |
636 |
> |
* The map will be empty after this call returns. |
637 |
|
*/ |
638 |
|
public void clear() { |
639 |
|
modCount++; |
645 |
|
* Returns a shallow copy of this <tt>TreeMap</tt> instance. (The keys and |
646 |
|
* values themselves are not cloned.) |
647 |
|
* |
648 |
< |
* @return a shallow copy of this Map. |
648 |
> |
* @return a shallow copy of this map |
649 |
|
*/ |
650 |
|
public Object clone() { |
651 |
|
TreeMap<K,V> clone = null; |
660 |
|
clone.size = 0; |
661 |
|
clone.modCount = 0; |
662 |
|
clone.entrySet = null; |
663 |
< |
clone.descendingEntrySet = null; |
664 |
< |
clone.descendingKeySet = null; |
663 |
> |
clone.navigableKeySet = null; |
664 |
> |
clone.descendingMap = null; |
665 |
|
|
666 |
|
// Initialize clone with our mappings |
667 |
|
try { |
676 |
|
// NavigableMap API methods |
677 |
|
|
678 |
|
/** |
679 |
< |
* Returns a key-value mapping associated with the least |
660 |
< |
* key in this map, or <tt>null</tt> if the map is empty. |
661 |
< |
* |
662 |
< |
* @return an Entry with least key, or <tt>null</tt> |
663 |
< |
* if the map is empty. |
679 |
> |
* @since 1.6 |
680 |
|
*/ |
681 |
|
public Map.Entry<K,V> firstEntry() { |
682 |
|
Entry<K,V> e = getFirstEntry(); |
683 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry(e); |
683 |
> |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
684 |
|
} |
685 |
|
|
686 |
|
/** |
687 |
< |
* Returns a key-value mapping associated with the greatest |
672 |
< |
* key in this map, or <tt>null</tt> if the map is empty. |
673 |
< |
* The returned entry does <em>not</em> support |
674 |
< |
* the <tt>Entry.setValue</tt> method. |
675 |
< |
* |
676 |
< |
* @return an Entry with greatest key, or <tt>null</tt> |
677 |
< |
* if the map is empty. |
687 |
> |
* @since 1.6 |
688 |
|
*/ |
689 |
|
public Map.Entry<K,V> lastEntry() { |
690 |
|
Entry<K,V> e = getLastEntry(); |
691 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry(e); |
691 |
> |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
692 |
|
} |
693 |
|
|
694 |
|
/** |
695 |
< |
* Removes and returns a key-value mapping associated with |
686 |
< |
* the least key in this map, or <tt>null</tt> if the map is empty. |
687 |
< |
* |
688 |
< |
* @return the removed first entry of this map, or <tt>null</tt> |
689 |
< |
* if the map is empty. |
695 |
> |
* @since 1.6 |
696 |
|
*/ |
697 |
|
public Map.Entry<K,V> pollFirstEntry() { |
698 |
|
Entry<K,V> p = getFirstEntry(); |
699 |
< |
if (p == null) |
699 |
> |
if (p == null) |
700 |
|
return null; |
701 |
< |
Map.Entry result = new AbstractMap.SimpleImmutableEntry(p); |
701 |
> |
Map.Entry<K,V> result = new AbstractMap.SimpleImmutableEntry<K,V>(p); |
702 |
|
deleteEntry(p); |
703 |
|
return result; |
704 |
|
} |
705 |
|
|
706 |
|
/** |
707 |
< |
* Removes and returns a key-value mapping associated with |
702 |
< |
* the greatest key in this map, or <tt>null</tt> if the map is empty. |
703 |
< |
* |
704 |
< |
* @return the removed last entry of this map, or <tt>null</tt> |
705 |
< |
* if the map is empty. |
707 |
> |
* @since 1.6 |
708 |
|
*/ |
709 |
|
public Map.Entry<K,V> pollLastEntry() { |
710 |
|
Entry<K,V> p = getLastEntry(); |
711 |
< |
if (p == null) |
711 |
> |
if (p == null) |
712 |
|
return null; |
713 |
< |
Map.Entry result = new AbstractMap.SimpleImmutableEntry(p); |
713 |
> |
Map.Entry<K,V> result = new AbstractMap.SimpleImmutableEntry<K,V>(p); |
714 |
|
deleteEntry(p); |
715 |
|
return result; |
716 |
|
} |
717 |
|
|
718 |
|
/** |
719 |
< |
* Returns a key-value mapping associated with the least key |
720 |
< |
* greater than or equal to the given key, or <tt>null</tt> if |
721 |
< |
* there is no such entry. |
722 |
< |
* |
723 |
< |
* @param key the key. |
722 |
< |
* @return an Entry associated with ceiling of given key, or |
723 |
< |
* <tt>null</tt> if there is no such Entry. |
724 |
< |
* @throws ClassCastException if key cannot be compared with the |
725 |
< |
* keys currently in the map. |
726 |
< |
* @throws NullPointerException if key is <tt>null</tt> and this map uses |
727 |
< |
* natural order, or its comparator does not tolerate |
728 |
< |
* <tt>null</tt> keys. |
719 |
> |
* @throws ClassCastException {@inheritDoc} |
720 |
> |
* @throws NullPointerException if the specified key is null |
721 |
> |
* and this map uses natural ordering, or its comparator |
722 |
> |
* does not permit null keys |
723 |
> |
* @since 1.6 |
724 |
|
*/ |
725 |
< |
public Map.Entry<K,V> ceilingEntry(K key) { |
726 |
< |
Entry<K,V> e = getCeilingEntry(key); |
727 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry(e); |
725 |
> |
public Map.Entry<K,V> lowerEntry(K key) { |
726 |
> |
Entry<K,V> e = getLowerEntry(key); |
727 |
> |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
728 |
|
} |
729 |
|
|
735 |
– |
|
730 |
|
/** |
731 |
< |
* Returns least key greater than or equal to the given key, or |
732 |
< |
* <tt>null</tt> if there is no such key. |
733 |
< |
* |
734 |
< |
* @param key the key. |
735 |
< |
* @return the ceiling key, or <tt>null</tt> |
742 |
< |
* if there is no such key. |
743 |
< |
* @throws ClassCastException if key cannot be compared with the keys |
744 |
< |
* currently in the map. |
745 |
< |
* @throws NullPointerException if key is <tt>null</tt> and this map uses |
746 |
< |
* natural order, or its comparator does not tolerate |
747 |
< |
* <tt>null</tt> keys. |
731 |
> |
* @throws ClassCastException {@inheritDoc} |
732 |
> |
* @throws NullPointerException if the specified key is null |
733 |
> |
* and this map uses natural ordering, or its comparator |
734 |
> |
* does not permit null keys |
735 |
> |
* @since 1.6 |
736 |
|
*/ |
737 |
< |
public K ceilingKey(K key) { |
738 |
< |
Entry<K,V> e = getCeilingEntry(key); |
737 |
> |
public K lowerKey(K key) { |
738 |
> |
Entry<K,V> e = getLowerEntry(key); |
739 |
|
return (e == null)? null : e.key; |
740 |
|
} |
741 |
|
|
754 |
– |
|
755 |
– |
|
742 |
|
/** |
743 |
< |
* Returns a key-value mapping associated with the greatest key |
744 |
< |
* less than or equal to the given key, or <tt>null</tt> if there |
745 |
< |
* is no such entry. |
746 |
< |
* |
747 |
< |
* @param key the key. |
762 |
< |
* @return an Entry associated with floor of given key, or <tt>null</tt> |
763 |
< |
* if there is no such Entry. |
764 |
< |
* @throws ClassCastException if key cannot be compared with the keys |
765 |
< |
* currently in the map. |
766 |
< |
* @throws NullPointerException if key is <tt>null</tt> and this map uses |
767 |
< |
* natural order, or its comparator does not tolerate |
768 |
< |
* <tt>null</tt> keys. |
743 |
> |
* @throws ClassCastException {@inheritDoc} |
744 |
> |
* @throws NullPointerException if the specified key is null |
745 |
> |
* and this map uses natural ordering, or its comparator |
746 |
> |
* does not permit null keys |
747 |
> |
* @since 1.6 |
748 |
|
*/ |
749 |
|
public Map.Entry<K,V> floorEntry(K key) { |
750 |
|
Entry<K,V> e = getFloorEntry(key); |
751 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry(e); |
751 |
> |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
752 |
|
} |
753 |
|
|
754 |
|
/** |
755 |
< |
* Returns the greatest key |
756 |
< |
* less than or equal to the given key, or <tt>null</tt> if there |
757 |
< |
* is no such key. |
758 |
< |
* |
759 |
< |
* @param key the key. |
781 |
< |
* @return the floor of given key, or <tt>null</tt> if there is no |
782 |
< |
* such key. |
783 |
< |
* @throws ClassCastException if key cannot be compared with the keys |
784 |
< |
* currently in the map. |
785 |
< |
* @throws NullPointerException if key is <tt>null</tt> and this map uses |
786 |
< |
* natural order, or its comparator does not tolerate |
787 |
< |
* <tt>null</tt> keys. |
755 |
> |
* @throws ClassCastException {@inheritDoc} |
756 |
> |
* @throws NullPointerException if the specified key is null |
757 |
> |
* and this map uses natural ordering, or its comparator |
758 |
> |
* does not permit null keys |
759 |
> |
* @since 1.6 |
760 |
|
*/ |
761 |
|
public K floorKey(K key) { |
762 |
|
Entry<K,V> e = getFloorEntry(key); |
764 |
|
} |
765 |
|
|
766 |
|
/** |
767 |
< |
* Returns a key-value mapping associated with the least key |
768 |
< |
* strictly greater than the given key, or <tt>null</tt> if there |
769 |
< |
* is no such entry. |
770 |
< |
* |
771 |
< |
* @param key the key. |
800 |
< |
* @return an Entry with least key greater than the given key, or |
801 |
< |
* <tt>null</tt> if there is no such Entry. |
802 |
< |
* @throws ClassCastException if key cannot be compared with the keys |
803 |
< |
* currently in the map. |
804 |
< |
* @throws NullPointerException if key is <tt>null</tt> and this map uses |
805 |
< |
* natural order, or its comparator does not tolerate |
806 |
< |
* <tt>null</tt> keys. |
767 |
> |
* @throws ClassCastException {@inheritDoc} |
768 |
> |
* @throws NullPointerException if the specified key is null |
769 |
> |
* and this map uses natural ordering, or its comparator |
770 |
> |
* does not permit null keys |
771 |
> |
* @since 1.6 |
772 |
|
*/ |
773 |
< |
public Map.Entry<K,V> higherEntry(K key) { |
774 |
< |
Entry<K,V> e = getHigherEntry(key); |
775 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry(e); |
773 |
> |
public Map.Entry<K,V> ceilingEntry(K key) { |
774 |
> |
Entry<K,V> e = getCeilingEntry(key); |
775 |
> |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
776 |
|
} |
777 |
|
|
778 |
|
/** |
779 |
< |
* Returns the least key strictly greater than the given key, or |
780 |
< |
* <tt>null</tt> if there is no such key. |
781 |
< |
* |
782 |
< |
* @param key the key. |
783 |
< |
* @return the least key greater than the given key, or |
819 |
< |
* <tt>null</tt> if there is no such key. |
820 |
< |
* @throws ClassCastException if key cannot be compared with the keys |
821 |
< |
* currently in the map. |
822 |
< |
* @throws NullPointerException if key is <tt>null</tt> and this map uses |
823 |
< |
* natural order, or its comparator does not tolerate |
824 |
< |
* <tt>null</tt> keys. |
779 |
> |
* @throws ClassCastException {@inheritDoc} |
780 |
> |
* @throws NullPointerException if the specified key is null |
781 |
> |
* and this map uses natural ordering, or its comparator |
782 |
> |
* does not permit null keys |
783 |
> |
* @since 1.6 |
784 |
|
*/ |
785 |
< |
public K higherKey(K key) { |
786 |
< |
Entry<K,V> e = getHigherEntry(key); |
785 |
> |
public K ceilingKey(K key) { |
786 |
> |
Entry<K,V> e = getCeilingEntry(key); |
787 |
|
return (e == null)? null : e.key; |
788 |
|
} |
789 |
|
|
790 |
|
/** |
791 |
< |
* Returns a key-value mapping associated with the greatest |
792 |
< |
* key strictly less than the given key, or <tt>null</tt> if there is no |
793 |
< |
* such entry. |
794 |
< |
* |
795 |
< |
* @param key the key. |
837 |
< |
* @return an Entry with greatest key less than the given |
838 |
< |
* key, or <tt>null</tt> if there is no such Entry. |
839 |
< |
* @throws ClassCastException if key cannot be compared with the keys |
840 |
< |
* currently in the map. |
841 |
< |
* @throws NullPointerException if key is <tt>null</tt> and this map uses |
842 |
< |
* natural order, or its comparator does not tolerate |
843 |
< |
* <tt>null</tt> keys. |
791 |
> |
* @throws ClassCastException {@inheritDoc} |
792 |
> |
* @throws NullPointerException if the specified key is null |
793 |
> |
* and this map uses natural ordering, or its comparator |
794 |
> |
* does not permit null keys |
795 |
> |
* @since 1.6 |
796 |
|
*/ |
797 |
< |
public Map.Entry<K,V> lowerEntry(K key) { |
798 |
< |
Entry<K,V> e = getLowerEntry(key); |
799 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry(e); |
797 |
> |
public Map.Entry<K,V> higherEntry(K key) { |
798 |
> |
Entry<K,V> e = getHigherEntry(key); |
799 |
> |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
800 |
|
} |
801 |
|
|
802 |
|
/** |
803 |
< |
* Returns the greatest key strictly less than the given key, or |
804 |
< |
* <tt>null</tt> if there is no such key. |
805 |
< |
* |
806 |
< |
* @param key the key. |
807 |
< |
* @return the greatest key less than the given |
856 |
< |
* key, or <tt>null</tt> if there is no such key. |
857 |
< |
* @throws ClassCastException if key cannot be compared with the keys |
858 |
< |
* currently in the map. |
859 |
< |
* @throws NullPointerException if key is <tt>null</tt> and this map uses |
860 |
< |
* natural order, or its comparator does not tolerate |
861 |
< |
* <tt>null</tt> keys. |
803 |
> |
* @throws ClassCastException {@inheritDoc} |
804 |
> |
* @throws NullPointerException if the specified key is null |
805 |
> |
* and this map uses natural ordering, or its comparator |
806 |
> |
* does not permit null keys |
807 |
> |
* @since 1.6 |
808 |
|
*/ |
809 |
< |
public K lowerKey(K key) { |
810 |
< |
Entry<K,V> e = getLowerEntry(key); |
809 |
> |
public K higherKey(K key) { |
810 |
> |
Entry<K,V> e = getHigherEntry(key); |
811 |
|
return (e == null)? null : e.key; |
812 |
|
} |
813 |
|
|
818 |
|
* the first time this view is requested. Views are stateless, so |
819 |
|
* there's no reason to create more than one. |
820 |
|
*/ |
821 |
< |
private transient Set<Map.Entry<K,V>> entrySet = null; |
822 |
< |
private transient Set<Map.Entry<K,V>> descendingEntrySet = null; |
823 |
< |
private transient Set<K> descendingKeySet = null; |
824 |
< |
|
825 |
< |
transient Set<K> keySet = null; // XXX remove when integrated |
826 |
< |
transient Collection<V> values = null; // XXX remove when integrated |
827 |
< |
|
828 |
< |
/** |
829 |
< |
* Returns a Set view of the keys contained in this map. The set's |
830 |
< |
* iterator will return the keys in ascending order. The set is backed by |
831 |
< |
* this <tt>TreeMap</tt> instance, so changes to this map are reflected in |
832 |
< |
* the Set, and vice-versa. The Set supports element removal, which |
833 |
< |
* removes the corresponding mapping from the map, via the |
834 |
< |
* <tt>Iterator.remove</tt>, <tt>Set.remove</tt>, <tt>removeAll</tt>, |
835 |
< |
* <tt>retainAll</tt>, and <tt>clear</tt> operations. It does not support |
836 |
< |
* the <tt>add</tt> or <tt>addAll</tt> operations. |
837 |
< |
* |
892 |
< |
* @return a set view of the keys contained in this TreeMap. |
821 |
> |
private transient EntrySet entrySet = null; |
822 |
> |
private transient KeySet<K> navigableKeySet = null; |
823 |
> |
private transient NavigableMap<K,V> descendingMap = null; |
824 |
> |
|
825 |
> |
/** |
826 |
> |
* Returns a {@link Set} view of the keys contained in this map. |
827 |
> |
* The set's iterator returns the keys in ascending order. |
828 |
> |
* The set is backed by the map, so changes to the map are |
829 |
> |
* reflected in the set, and vice-versa. If the map is modified |
830 |
> |
* while an iteration over the set is in progress (except through |
831 |
> |
* the iterator's own <tt>remove</tt> operation), the results of |
832 |
> |
* the iteration are undefined. The set supports element removal, |
833 |
> |
* which removes the corresponding mapping from the map, via the |
834 |
> |
* <tt>Iterator.remove</tt>, <tt>Set.remove</tt>, |
835 |
> |
* <tt>removeAll</tt>, <tt>retainAll</tt>, and <tt>clear</tt> |
836 |
> |
* operations. It does not support the <tt>add</tt> or <tt>addAll</tt> |
837 |
> |
* operations. |
838 |
|
*/ |
839 |
|
public Set<K> keySet() { |
840 |
< |
Set<K> ks = keySet; |
896 |
< |
return (ks != null) ? ks : (keySet = new KeySet()); |
840 |
> |
return navigableKeySet(); |
841 |
|
} |
842 |
|
|
843 |
< |
class KeySet extends AbstractSet<K> { |
844 |
< |
public Iterator<K> iterator() { |
845 |
< |
return new KeyIterator(getFirstEntry()); |
846 |
< |
} |
847 |
< |
|
848 |
< |
public int size() { |
905 |
< |
return TreeMap.this.size(); |
906 |
< |
} |
907 |
< |
|
908 |
< |
public boolean contains(Object o) { |
909 |
< |
return containsKey(o); |
910 |
< |
} |
911 |
< |
|
912 |
< |
public boolean remove(Object o) { |
913 |
< |
int oldSize = size; |
914 |
< |
TreeMap.this.remove(o); |
915 |
< |
return size != oldSize; |
916 |
< |
} |
917 |
< |
|
918 |
< |
public void clear() { |
919 |
< |
TreeMap.this.clear(); |
920 |
< |
} |
843 |
> |
/** |
844 |
> |
* @since 1.6 |
845 |
> |
*/ |
846 |
> |
public NavigableSet<K> navigableKeySet() { |
847 |
> |
KeySet<K> nks = navigableKeySet; |
848 |
> |
return (nks != null) ? nks : (navigableKeySet = new KeySet(this)); |
849 |
|
} |
850 |
|
|
851 |
|
/** |
852 |
< |
* Returns a collection view of the values contained in this map. The |
853 |
< |
* collection's iterator will return the values in the order that their |
854 |
< |
* corresponding keys appear in the tree. The collection is backed by |
855 |
< |
* this <tt>TreeMap</tt> instance, so changes to this map are reflected in |
856 |
< |
* the collection, and vice-versa. The collection supports element |
857 |
< |
* removal, which removes the corresponding mapping from the map through |
858 |
< |
* the <tt>Iterator.remove</tt>, <tt>Collection.remove</tt>, |
859 |
< |
* <tt>removeAll</tt>, <tt>retainAll</tt>, and <tt>clear</tt> operations. |
860 |
< |
* It does not support the <tt>add</tt> or <tt>addAll</tt> operations. |
861 |
< |
* |
862 |
< |
* @return a collection view of the values contained in this map. |
852 |
> |
* @since 1.6 |
853 |
> |
*/ |
854 |
> |
public NavigableSet<K> descendingKeySet() { |
855 |
> |
return descendingMap().navigableKeySet(); |
856 |
> |
} |
857 |
> |
|
858 |
> |
/** |
859 |
> |
* Returns a {@link Collection} view of the values contained in this map. |
860 |
> |
* The collection's iterator returns the values in ascending order |
861 |
> |
* of the corresponding keys. |
862 |
> |
* The collection is backed by the map, so changes to the map are |
863 |
> |
* reflected in the collection, and vice-versa. If the map is |
864 |
> |
* modified while an iteration over the collection is in progress |
865 |
> |
* (except through the iterator's own <tt>remove</tt> operation), |
866 |
> |
* the results of the iteration are undefined. The collection |
867 |
> |
* supports element removal, which removes the corresponding |
868 |
> |
* mapping from the map, via the <tt>Iterator.remove</tt>, |
869 |
> |
* <tt>Collection.remove</tt>, <tt>removeAll</tt>, |
870 |
> |
* <tt>retainAll</tt> and <tt>clear</tt> operations. It does not |
871 |
> |
* support the <tt>add</tt> or <tt>addAll</tt> operations. |
872 |
|
*/ |
873 |
|
public Collection<V> values() { |
874 |
|
Collection<V> vs = values; |
875 |
|
return (vs != null) ? vs : (values = new Values()); |
876 |
|
} |
877 |
|
|
878 |
+ |
/** |
879 |
+ |
* Returns a {@link Set} view of the mappings contained in this map. |
880 |
+ |
* The set's iterator returns the entries in ascending key order. |
881 |
+ |
* The set is backed by the map, so changes to the map are |
882 |
+ |
* reflected in the set, and vice-versa. If the map is modified |
883 |
+ |
* while an iteration over the set is in progress (except through |
884 |
+ |
* the iterator's own <tt>remove</tt> operation, or through the |
885 |
+ |
* <tt>setValue</tt> operation on a map entry returned by the |
886 |
+ |
* iterator) the results of the iteration are undefined. The set |
887 |
+ |
* supports element removal, which removes the corresponding |
888 |
+ |
* mapping from the map, via the <tt>Iterator.remove</tt>, |
889 |
+ |
* <tt>Set.remove</tt>, <tt>removeAll</tt>, <tt>retainAll</tt> and |
890 |
+ |
* <tt>clear</tt> operations. It does not support the |
891 |
+ |
* <tt>add</tt> or <tt>addAll</tt> operations. |
892 |
+ |
*/ |
893 |
+ |
public Set<Map.Entry<K,V>> entrySet() { |
894 |
+ |
EntrySet es = entrySet; |
895 |
+ |
return (es != null) ? es : (entrySet = new EntrySet()); |
896 |
+ |
} |
897 |
+ |
|
898 |
+ |
/** |
899 |
+ |
* @since 1.6 |
900 |
+ |
*/ |
901 |
+ |
public NavigableMap<K, V> descendingMap() { |
902 |
+ |
NavigableMap<K, V> km = descendingMap; |
903 |
+ |
return (km != null) ? km : |
904 |
+ |
(descendingMap = new DescendingSubMap(this, |
905 |
+ |
true, null, 0, |
906 |
+ |
true, null, 0)); |
907 |
+ |
} |
908 |
+ |
|
909 |
+ |
/** |
910 |
+ |
* @throws ClassCastException {@inheritDoc} |
911 |
+ |
* @throws NullPointerException if <tt>fromKey</tt> or <tt>toKey</tt> is |
912 |
+ |
* null and this map uses natural ordering, or its comparator |
913 |
+ |
* does not permit null keys |
914 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
915 |
+ |
* @since 1.6 |
916 |
+ |
*/ |
917 |
+ |
public NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive, |
918 |
+ |
K toKey, boolean toInclusive) { |
919 |
+ |
return new AscendingSubMap(this, |
920 |
+ |
false, fromKey, excluded(fromInclusive), |
921 |
+ |
false, toKey, excluded(toInclusive)); |
922 |
+ |
} |
923 |
+ |
|
924 |
+ |
/** |
925 |
+ |
* @throws ClassCastException {@inheritDoc} |
926 |
+ |
* @throws NullPointerException if <tt>toKey</tt> is null |
927 |
+ |
* and this map uses natural ordering, or its comparator |
928 |
+ |
* does not permit null keys |
929 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
930 |
+ |
* @since 1.6 |
931 |
+ |
*/ |
932 |
+ |
public NavigableMap<K,V> headMap(K toKey, boolean inclusive) { |
933 |
+ |
return new AscendingSubMap(this, |
934 |
+ |
true, null, 0, |
935 |
+ |
false, toKey, excluded(inclusive)); |
936 |
+ |
} |
937 |
+ |
|
938 |
+ |
/** |
939 |
+ |
* @throws ClassCastException {@inheritDoc} |
940 |
+ |
* @throws NullPointerException if <tt>fromKey</tt> is null |
941 |
+ |
* and this map uses natural ordering, or its comparator |
942 |
+ |
* does not permit null keys |
943 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
944 |
+ |
* @since 1.6 |
945 |
+ |
*/ |
946 |
+ |
public NavigableMap<K,V> tailMap(K fromKey, boolean inclusive) { |
947 |
+ |
return new AscendingSubMap(this, |
948 |
+ |
false, fromKey, excluded(inclusive), |
949 |
+ |
true, null, 0); |
950 |
+ |
} |
951 |
+ |
|
952 |
+ |
/** |
953 |
+ |
* Translates a boolean "inclusive" value to the correct int value |
954 |
+ |
* for the loExcluded or hiExcluded field. |
955 |
+ |
*/ |
956 |
+ |
static int excluded(boolean inclusive) { |
957 |
+ |
return inclusive ? 0 : 1; |
958 |
+ |
} |
959 |
+ |
|
960 |
+ |
/** |
961 |
+ |
* @throws ClassCastException {@inheritDoc} |
962 |
+ |
* @throws NullPointerException if <tt>fromKey</tt> or <tt>toKey</tt> is |
963 |
+ |
* null and this map uses natural ordering, or its comparator |
964 |
+ |
* does not permit null keys |
965 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
966 |
+ |
*/ |
967 |
+ |
public SortedMap<K,V> subMap(K fromKey, K toKey) { |
968 |
+ |
return subMap(fromKey, true, toKey, false); |
969 |
+ |
} |
970 |
+ |
|
971 |
+ |
/** |
972 |
+ |
* @throws ClassCastException {@inheritDoc} |
973 |
+ |
* @throws NullPointerException if <tt>toKey</tt> is null |
974 |
+ |
* and this map uses natural ordering, or its comparator |
975 |
+ |
* does not permit null keys |
976 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
977 |
+ |
*/ |
978 |
+ |
public SortedMap<K,V> headMap(K toKey) { |
979 |
+ |
return headMap(toKey, false); |
980 |
+ |
} |
981 |
+ |
|
982 |
+ |
/** |
983 |
+ |
* @throws ClassCastException {@inheritDoc} |
984 |
+ |
* @throws NullPointerException if <tt>fromKey</tt> is null |
985 |
+ |
* and this map uses natural ordering, or its comparator |
986 |
+ |
* does not permit null keys |
987 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
988 |
+ |
*/ |
989 |
+ |
public SortedMap<K,V> tailMap(K fromKey) { |
990 |
+ |
return tailMap(fromKey, true); |
991 |
+ |
} |
992 |
+ |
|
993 |
+ |
// View class support |
994 |
+ |
|
995 |
|
class Values extends AbstractCollection<V> { |
996 |
|
public Iterator<V> iterator() { |
997 |
|
return new ValueIterator(getFirstEntry()); |
998 |
|
} |
999 |
< |
|
999 |
> |
|
1000 |
|
public int size() { |
1001 |
|
return TreeMap.this.size(); |
1002 |
|
} |
1003 |
< |
|
1003 |
> |
|
1004 |
|
public boolean contains(Object o) { |
1005 |
|
for (Entry<K,V> e = getFirstEntry(); e != null; e = successor(e)) |
1006 |
|
if (valEquals(e.getValue(), o)) |
1007 |
|
return true; |
1008 |
|
return false; |
1009 |
|
} |
1010 |
< |
|
1010 |
> |
|
1011 |
|
public boolean remove(Object o) { |
1012 |
|
for (Entry<K,V> e = getFirstEntry(); e != null; e = successor(e)) { |
1013 |
|
if (valEquals(e.getValue(), o)) { |
1017 |
|
} |
1018 |
|
return false; |
1019 |
|
} |
1020 |
< |
|
1020 |
> |
|
1021 |
|
public void clear() { |
1022 |
|
TreeMap.this.clear(); |
1023 |
|
} |
1024 |
|
} |
1025 |
|
|
972 |
– |
/** |
973 |
– |
* Returns a set view of the mappings contained in this map. The set's |
974 |
– |
* iterator returns the mappings in ascending key order. Each element in |
975 |
– |
* the returned set is a <tt>Map.Entry</tt>. The set is backed by this |
976 |
– |
* map, so changes to this map are reflected in the set, and vice-versa. |
977 |
– |
* The set supports element removal, which removes the corresponding |
978 |
– |
* mapping from the TreeMap, through the <tt>Iterator.remove</tt>, |
979 |
– |
* <tt>Set.remove</tt>, <tt>removeAll</tt>, <tt>retainAll</tt> and |
980 |
– |
* <tt>clear</tt> operations. It does not support the <tt>add</tt> or |
981 |
– |
* <tt>addAll</tt> operations. |
982 |
– |
* |
983 |
– |
* @return a set view of the mappings contained in this map. |
984 |
– |
* @see Map.Entry |
985 |
– |
*/ |
986 |
– |
public Set<Map.Entry<K,V>> entrySet() { |
987 |
– |
Set<Map.Entry<K,V>> es = entrySet; |
988 |
– |
return (es != null) ? es : (entrySet = new EntrySet()); |
989 |
– |
} |
990 |
– |
|
1026 |
|
class EntrySet extends AbstractSet<Map.Entry<K,V>> { |
1027 |
|
public Iterator<Map.Entry<K,V>> iterator() { |
1028 |
|
return new EntryIterator(getFirstEntry()); |
1029 |
|
} |
1030 |
< |
|
1030 |
> |
|
1031 |
|
public boolean contains(Object o) { |
1032 |
|
if (!(o instanceof Map.Entry)) |
1033 |
|
return false; |
1036 |
|
Entry<K,V> p = getEntry(entry.getKey()); |
1037 |
|
return p != null && valEquals(p.getValue(), value); |
1038 |
|
} |
1039 |
< |
|
1039 |
> |
|
1040 |
|
public boolean remove(Object o) { |
1041 |
|
if (!(o instanceof Map.Entry)) |
1042 |
|
return false; |
1049 |
|
} |
1050 |
|
return false; |
1051 |
|
} |
1052 |
< |
|
1052 |
> |
|
1053 |
|
public int size() { |
1054 |
|
return TreeMap.this.size(); |
1055 |
|
} |
1056 |
< |
|
1056 |
> |
|
1057 |
|
public void clear() { |
1058 |
|
TreeMap.this.clear(); |
1059 |
|
} |
1060 |
|
} |
1061 |
|
|
1062 |
< |
/** |
1063 |
< |
* Returns a set view of the mappings contained in this map. The |
1064 |
< |
* set's iterator returns the mappings in descending key order. |
1065 |
< |
* Each element in the returned set is a <tt>Map.Entry</tt>. The |
1066 |
< |
* set is backed by this map, so changes to this map are reflected |
1067 |
< |
* in the set, and vice-versa. The set supports element removal, |
1068 |
< |
* which removes the corresponding mapping from the TreeMap, |
1069 |
< |
* through the <tt>Iterator.remove</tt>, <tt>Set.remove</tt>, |
1070 |
< |
* <tt>removeAll</tt>, <tt>retainAll</tt> and <tt>clear</tt> |
1071 |
< |
* operations. It does not support the <tt>add</tt> or |
1037 |
< |
* <tt>addAll</tt> operations. |
1038 |
< |
* |
1039 |
< |
* @return a set view of the mappings contained in this map, in |
1040 |
< |
* descending key order |
1041 |
< |
* @see Map.Entry |
1042 |
< |
*/ |
1043 |
< |
public Set<Map.Entry<K,V>> descendingEntrySet() { |
1044 |
< |
Set<Map.Entry<K,V>> es = descendingEntrySet; |
1045 |
< |
return (es != null) ? es : (descendingEntrySet = new DescendingEntrySet()); |
1062 |
> |
/* |
1063 |
> |
* Unlike Values and EntrySet, the KeySet class is static, |
1064 |
> |
* delegating to a NavigableMap to allow use by SubMaps, which |
1065 |
> |
* outweighs the ugliness of needing type-tests for the following |
1066 |
> |
* Iterator methods that are defined appropriately in main versus |
1067 |
> |
* submap classes. |
1068 |
> |
*/ |
1069 |
> |
|
1070 |
> |
Iterator<K> keyIterator() { |
1071 |
> |
return new KeyIterator(getFirstEntry()); |
1072 |
|
} |
1073 |
|
|
1074 |
< |
class DescendingEntrySet extends EntrySet { |
1075 |
< |
public Iterator<Map.Entry<K,V>> iterator() { |
1050 |
< |
return new DescendingEntryIterator(getLastEntry()); |
1051 |
< |
} |
1074 |
> |
Iterator<K> descendingKeyIterator() { |
1075 |
> |
return new DescendingKeyIterator(getFirstEntry()); |
1076 |
|
} |
1077 |
|
|
1078 |
< |
/** |
1079 |
< |
* Returns a Set view of the keys contained in this map. The |
1080 |
< |
* set's iterator will return the keys in descending order. The |
1081 |
< |
* map is backed by this <tt>TreeMap</tt> instance, so changes to |
1082 |
< |
* this map are reflected in the Set, and vice-versa. The Set |
1083 |
< |
* supports element removal, which removes the corresponding |
1084 |
< |
* mapping from the map, via the <tt>Iterator.remove</tt>, |
1085 |
< |
* <tt>Set.remove</tt>, <tt>removeAll</tt>, <tt>retainAll</tt>, |
1086 |
< |
* and <tt>clear</tt> operations. It does not support the |
1087 |
< |
* <tt>add</tt> or <tt>addAll</tt> operations. |
1088 |
< |
* |
1089 |
< |
* @return a set view of the keys contained in this TreeMap. |
1090 |
< |
*/ |
1091 |
< |
public Set<K> descendingKeySet() { |
1092 |
< |
Set<K> ks = descendingKeySet; |
1093 |
< |
return (ks != null) ? ks : (descendingKeySet = new DescendingKeySet()); |
1094 |
< |
} |
1095 |
< |
|
1096 |
< |
class DescendingKeySet extends KeySet { |
1097 |
< |
public Iterator<K> iterator() { |
1098 |
< |
return new DescendingKeyIterator(getLastEntry()); |
1078 |
> |
static final class KeySet<E> extends AbstractSet<E> implements NavigableSet<E> { |
1079 |
> |
private final NavigableMap<E, Object> m; |
1080 |
> |
KeySet(NavigableMap<E,Object> map) { m = map; } |
1081 |
> |
|
1082 |
> |
public Iterator<E> iterator() { |
1083 |
> |
if (m instanceof TreeMap) |
1084 |
> |
return ((TreeMap<E,Object>)m).keyIterator(); |
1085 |
> |
else |
1086 |
> |
return (Iterator<E>)(((TreeMap.NavigableSubMap)m).keyIterator()); |
1087 |
> |
} |
1088 |
> |
|
1089 |
> |
public Iterator<E> descendingIterator() { |
1090 |
> |
if (m instanceof TreeMap) |
1091 |
> |
return ((TreeMap<E,Object>)m).descendingKeyIterator(); |
1092 |
> |
else |
1093 |
> |
return (Iterator<E>)(((TreeMap.NavigableSubMap)m).descendingKeyIterator()); |
1094 |
> |
} |
1095 |
> |
|
1096 |
> |
public int size() { return m.size(); } |
1097 |
> |
public boolean isEmpty() { return m.isEmpty(); } |
1098 |
> |
public boolean contains(Object o) { return m.containsKey(o); } |
1099 |
> |
public void clear() { m.clear(); } |
1100 |
> |
public E lower(E e) { return m.lowerKey(e); } |
1101 |
> |
public E floor(E e) { return m.floorKey(e); } |
1102 |
> |
public E ceiling(E e) { return m.ceilingKey(e); } |
1103 |
> |
public E higher(E e) { return m.higherKey(e); } |
1104 |
> |
public E first() { return m.firstKey(); } |
1105 |
> |
public E last() { return m.lastKey(); } |
1106 |
> |
public Comparator<? super E> comparator() { return m.comparator(); } |
1107 |
> |
public E pollFirst() { |
1108 |
> |
Map.Entry<E,Object> e = m.pollFirstEntry(); |
1109 |
> |
return e == null? null : e.getKey(); |
1110 |
> |
} |
1111 |
> |
public E pollLast() { |
1112 |
> |
Map.Entry<E,Object> e = m.pollLastEntry(); |
1113 |
> |
return e == null? null : e.getKey(); |
1114 |
> |
} |
1115 |
> |
public boolean remove(Object o) { |
1116 |
> |
int oldSize = size(); |
1117 |
> |
m.remove(o); |
1118 |
> |
return size() != oldSize; |
1119 |
> |
} |
1120 |
> |
public NavigableSet<E> subSet(E fromElement, boolean fromInclusive, |
1121 |
> |
E toElement, boolean toInclusive) { |
1122 |
> |
return new TreeSet<E>(m.subMap(fromElement, fromInclusive, |
1123 |
> |
toElement, toInclusive)); |
1124 |
> |
} |
1125 |
> |
public NavigableSet<E> headSet(E toElement, boolean inclusive) { |
1126 |
> |
return new TreeSet<E>(m.headMap(toElement, inclusive)); |
1127 |
> |
} |
1128 |
> |
public NavigableSet<E> tailSet(E fromElement, boolean inclusive) { |
1129 |
> |
return new TreeSet<E>(m.tailMap(fromElement, inclusive)); |
1130 |
> |
} |
1131 |
> |
public SortedSet<E> subSet(E fromElement, E toElement) { |
1132 |
> |
return subSet(fromElement, true, toElement, false); |
1133 |
> |
} |
1134 |
> |
public SortedSet<E> headSet(E toElement) { |
1135 |
> |
return headSet(toElement, false); |
1136 |
> |
} |
1137 |
> |
public SortedSet<E> tailSet(E fromElement) { |
1138 |
> |
return tailSet(fromElement, true); |
1139 |
> |
} |
1140 |
> |
public NavigableSet<E> descendingSet() { |
1141 |
> |
return new TreeSet(m.descendingMap()); |
1142 |
|
} |
1143 |
|
} |
1144 |
|
|
1145 |
|
/** |
1146 |
< |
* Returns a view of the portion of this map whose keys range from |
1080 |
< |
* <tt>fromKey</tt>, inclusive, to <tt>toKey</tt>, exclusive. (If |
1081 |
< |
* <tt>fromKey</tt> and <tt>toKey</tt> are equal, the returned |
1082 |
< |
* navigable map is empty.) The returned navigable map is backed |
1083 |
< |
* by this map, so changes in the returned navigable map are |
1084 |
< |
* reflected in this map, and vice-versa. The returned navigable |
1085 |
< |
* map supports all optional map operations.<p> |
1086 |
< |
* |
1087 |
< |
* The navigable map returned by this method will throw an |
1088 |
< |
* <tt>IllegalArgumentException</tt> if the user attempts to insert a key |
1089 |
< |
* less than <tt>fromKey</tt> or greater than or equal to |
1090 |
< |
* <tt>toKey</tt>.<p> |
1091 |
< |
* |
1092 |
< |
* Note: this method always returns a <i>half-open range</i> (which |
1093 |
< |
* includes its low endpoint but not its high endpoint). If you need a |
1094 |
< |
* <i>closed range</i> (which includes both endpoints), and the key type |
1095 |
< |
* allows for calculation of the successor of a given key, merely request the |
1096 |
< |
* subrange from <tt>lowEndpoint</tt> to <tt>successor(highEndpoint)</tt>. |
1097 |
< |
* For example, suppose that <tt>m</tt> is a navigable map whose keys are |
1098 |
< |
* strings. The following idiom obtains a view containing all of the |
1099 |
< |
* key-value mappings in <tt>m</tt> whose keys are between <tt>low</tt> |
1100 |
< |
* and <tt>high</tt>, inclusive: |
1101 |
< |
* <pre> NavigableMap sub = m.navigableSubMap(low, high+"\0");</pre> |
1102 |
< |
* A similar technique can be used to generate an <i>open range</i> (which |
1103 |
< |
* contains neither endpoint). The following idiom obtains a view |
1104 |
< |
* containing all of the key-value mappings in <tt>m</tt> whose keys are |
1105 |
< |
* between <tt>low</tt> and <tt>high</tt>, exclusive: |
1106 |
< |
* <pre> NavigableMap sub = m.navigableSubMap(low+"\0", high);</pre> |
1107 |
< |
* |
1108 |
< |
* @param fromKey low endpoint (inclusive) of the subMap. |
1109 |
< |
* @param toKey high endpoint (exclusive) of the subMap. |
1110 |
< |
* |
1111 |
< |
* @return a view of the portion of this map whose keys range from |
1112 |
< |
* <tt>fromKey</tt>, inclusive, to <tt>toKey</tt>, exclusive. |
1113 |
< |
* |
1114 |
< |
* @throws ClassCastException if <tt>fromKey</tt> and <tt>toKey</tt> |
1115 |
< |
* cannot be compared to one another using this map's comparator |
1116 |
< |
* (or, if the map has no comparator, using natural ordering). |
1117 |
< |
* @throws IllegalArgumentException if <tt>fromKey</tt> is greater than |
1118 |
< |
* <tt>toKey</tt>. |
1119 |
< |
* @throws NullPointerException if <tt>fromKey</tt> or <tt>toKey</tt> is |
1120 |
< |
* <tt>null</tt> and this map uses natural order, or its |
1121 |
< |
* comparator does not tolerate <tt>null</tt> keys. |
1146 |
> |
* Base class for TreeMap Iterators |
1147 |
|
*/ |
1148 |
< |
public NavigableMap<K,V> navigableSubMap(K fromKey, K toKey) { |
1149 |
< |
return new SubMap(fromKey, toKey); |
1150 |
< |
} |
1148 |
> |
abstract class PrivateEntryIterator<T> implements Iterator<T> { |
1149 |
> |
Entry<K,V> next; |
1150 |
> |
Entry<K,V> lastReturned; |
1151 |
> |
int expectedModCount; |
1152 |
|
|
1153 |
+ |
PrivateEntryIterator(Entry<K,V> first) { |
1154 |
+ |
expectedModCount = modCount; |
1155 |
+ |
lastReturned = null; |
1156 |
+ |
next = first; |
1157 |
+ |
} |
1158 |
|
|
1159 |
< |
/** |
1160 |
< |
* Returns a view of the portion of this map whose keys are strictly less |
1161 |
< |
* than <tt>toKey</tt>. The returned navigable map is backed by this map, so |
1162 |
< |
* changes in the returned navigable map are reflected in this map, and |
1163 |
< |
* vice-versa. The returned navigable map supports all optional map |
1164 |
< |
* operations.<p> |
1165 |
< |
* |
1166 |
< |
* The navigable map returned by this method will throw an |
1167 |
< |
* <tt>IllegalArgumentException</tt> if the user attempts to insert a key |
1168 |
< |
* greater than or equal to <tt>toKey</tt>.<p> |
1169 |
< |
* |
1170 |
< |
* Note: this method always returns a view that does not contain its |
1171 |
< |
* (high) endpoint. If you need a view that does contain this endpoint, |
1172 |
< |
* and the key type allows for calculation of the successor of a given key, |
1173 |
< |
* merely request a headMap bounded by <tt>successor(highEndpoint)</tt>. |
1174 |
< |
* For example, suppose that suppose that <tt>m</tt> is a navigable map whose |
1175 |
< |
* keys are strings. The following idiom obtains a view containing all of |
1176 |
< |
* the key-value mappings in <tt>m</tt> whose keys are less than or equal |
1177 |
< |
* to <tt>high</tt>: |
1178 |
< |
* <pre> |
1179 |
< |
* NavigableMap head = m.headMap(high+"\0"); |
1180 |
< |
* </pre> |
1181 |
< |
* |
1182 |
< |
* @param toKey high endpoint (exclusive) of the headMap. |
1183 |
< |
* @return a view of the portion of this map whose keys are strictly |
1184 |
< |
* less than <tt>toKey</tt>. |
1185 |
< |
* |
1186 |
< |
* @throws ClassCastException if <tt>toKey</tt> is not compatible |
1187 |
< |
* with this map's comparator (or, if the map has no comparator, |
1188 |
< |
* if <tt>toKey</tt> does not implement <tt>Comparable</tt>). |
1189 |
< |
* @throws IllegalArgumentException if this map is itself a subMap, |
1190 |
< |
* headMap, or tailMap, and <tt>toKey</tt> is not within the |
1191 |
< |
* specified range of the subMap, headMap, or tailMap. |
1192 |
< |
* @throws NullPointerException if <tt>toKey</tt> is <tt>null</tt> and |
1193 |
< |
* this map uses natural order, or its comparator does not |
1163 |
< |
* tolerate <tt>null</tt> keys. |
1164 |
< |
*/ |
1165 |
< |
public NavigableMap<K,V> navigableHeadMap(K toKey) { |
1166 |
< |
return new SubMap(toKey, true); |
1167 |
< |
} |
1168 |
< |
|
1169 |
< |
/** |
1170 |
< |
* Returns a view of the portion of this map whose keys are greater than |
1171 |
< |
* or equal to <tt>fromKey</tt>. The returned navigable map is backed by |
1172 |
< |
* this map, so changes in the returned navigable map are reflected in this |
1173 |
< |
* map, and vice-versa. The returned navigable map supports all optional map |
1174 |
< |
* operations.<p> |
1175 |
< |
* |
1176 |
< |
* The navigable map returned by this method will throw an |
1177 |
< |
* <tt>IllegalArgumentException</tt> if the user attempts to insert a key |
1178 |
< |
* less than <tt>fromKey</tt>.<p> |
1179 |
< |
* |
1180 |
< |
* Note: this method always returns a view that contains its (low) |
1181 |
< |
* endpoint. If you need a view that does not contain this endpoint, and |
1182 |
< |
* the element type allows for calculation of the successor of a given value, |
1183 |
< |
* merely request a tailMap bounded by <tt>successor(lowEndpoint)</tt>. |
1184 |
< |
* For example, suppose that <tt>m</tt> is a navigable map whose keys |
1185 |
< |
* are strings. The following idiom obtains a view containing |
1186 |
< |
* all of the key-value mappings in <tt>m</tt> whose keys are strictly |
1187 |
< |
* greater than <tt>low</tt>: <pre> |
1188 |
< |
* NavigableMap tail = m.tailMap(low+"\0"); |
1189 |
< |
* </pre> |
1190 |
< |
* |
1191 |
< |
* @param fromKey low endpoint (inclusive) of the tailMap. |
1192 |
< |
* @return a view of the portion of this map whose keys are greater |
1193 |
< |
* than or equal to <tt>fromKey</tt>. |
1194 |
< |
* @throws ClassCastException if <tt>fromKey</tt> is not compatible |
1195 |
< |
* with this map's comparator (or, if the map has no comparator, |
1196 |
< |
* if <tt>fromKey</tt> does not implement <tt>Comparable</tt>). |
1197 |
< |
* @throws IllegalArgumentException if this map is itself a subMap, |
1198 |
< |
* headMap, or tailMap, and <tt>fromKey</tt> is not within the |
1199 |
< |
* specified range of the subMap, headMap, or tailMap. |
1200 |
< |
* @throws NullPointerException if <tt>fromKey</tt> is <tt>null</tt> and |
1201 |
< |
* this map uses natural order, or its comparator does not |
1202 |
< |
* tolerate <tt>null</tt> keys. |
1203 |
< |
*/ |
1204 |
< |
public NavigableMap<K,V> navigableTailMap(K fromKey) { |
1205 |
< |
return new SubMap(fromKey, false); |
1206 |
< |
} |
1207 |
< |
|
1208 |
< |
/** |
1209 |
< |
* Equivalent to <tt>navigableSubMap</tt> but with a return |
1210 |
< |
* type conforming to the <tt>SortedMap</tt> interface. |
1211 |
< |
* @param fromKey low endpoint (inclusive) of the subMap. |
1212 |
< |
* @param toKey high endpoint (exclusive) of the subMap. |
1213 |
< |
* |
1214 |
< |
* @return a view of the portion of this map whose keys range from |
1215 |
< |
* <tt>fromKey</tt>, inclusive, to <tt>toKey</tt>, exclusive. |
1216 |
< |
* |
1217 |
< |
* @throws ClassCastException if <tt>fromKey</tt> and <tt>toKey</tt> |
1218 |
< |
* cannot be compared to one another using this map's comparator |
1219 |
< |
* (or, if the map has no comparator, using natural ordering). |
1220 |
< |
* @throws IllegalArgumentException if <tt>fromKey</tt> is greater than |
1221 |
< |
* <tt>toKey</tt>. |
1222 |
< |
* @throws NullPointerException if <tt>fromKey</tt> or <tt>toKey</tt> is |
1223 |
< |
* <tt>null</tt> and this map uses natural order, or its |
1224 |
< |
* comparator does not tolerate <tt>null</tt> keys. |
1225 |
< |
*/ |
1226 |
< |
public SortedMap<K,V> subMap(K fromKey, K toKey) { |
1227 |
< |
return new SubMap(fromKey, toKey); |
1159 |
> |
public final boolean hasNext() { |
1160 |
> |
return next != null; |
1161 |
> |
} |
1162 |
> |
|
1163 |
> |
final Entry<K,V> nextEntry() { |
1164 |
> |
Entry<K,V> e = lastReturned = next; |
1165 |
> |
if (e == null) |
1166 |
> |
throw new NoSuchElementException(); |
1167 |
> |
if (modCount != expectedModCount) |
1168 |
> |
throw new ConcurrentModificationException(); |
1169 |
> |
next = successor(e); |
1170 |
> |
return e; |
1171 |
> |
} |
1172 |
> |
|
1173 |
> |
final Entry<K,V> prevEntry() { |
1174 |
> |
Entry<K,V> e = lastReturned= next; |
1175 |
> |
if (e == null) |
1176 |
> |
throw new NoSuchElementException(); |
1177 |
> |
if (modCount != expectedModCount) |
1178 |
> |
throw new ConcurrentModificationException(); |
1179 |
> |
next = predecessor(e); |
1180 |
> |
return e; |
1181 |
> |
} |
1182 |
> |
|
1183 |
> |
public void remove() { |
1184 |
> |
if (lastReturned == null) |
1185 |
> |
throw new IllegalStateException(); |
1186 |
> |
if (modCount != expectedModCount) |
1187 |
> |
throw new ConcurrentModificationException(); |
1188 |
> |
if (lastReturned.left != null && lastReturned.right != null) |
1189 |
> |
next = lastReturned; |
1190 |
> |
deleteEntry(lastReturned); |
1191 |
> |
expectedModCount++; |
1192 |
> |
lastReturned = null; |
1193 |
> |
} |
1194 |
|
} |
1195 |
|
|
1196 |
+ |
final class EntryIterator extends PrivateEntryIterator<Map.Entry<K,V>> { |
1197 |
+ |
EntryIterator(Entry<K,V> first) { |
1198 |
+ |
super(first); |
1199 |
+ |
} |
1200 |
+ |
public Map.Entry<K,V> next() { |
1201 |
+ |
return nextEntry(); |
1202 |
+ |
} |
1203 |
+ |
} |
1204 |
|
|
1205 |
< |
/** |
1206 |
< |
* Equivalent to <tt>navigableHeadMap</tt> but with a return |
1207 |
< |
* type conforming to the <tt>SortedMap</tt> interface. |
1208 |
< |
* |
1209 |
< |
* @param toKey high endpoint (exclusive) of the headMap. |
1210 |
< |
* @return a view of the portion of this map whose keys are strictly |
1211 |
< |
* less than <tt>toKey</tt>. |
1238 |
< |
* |
1239 |
< |
* @throws ClassCastException if <tt>toKey</tt> is not compatible |
1240 |
< |
* with this map's comparator (or, if the map has no comparator, |
1241 |
< |
* if <tt>toKey</tt> does not implement <tt>Comparable</tt>). |
1242 |
< |
* @throws IllegalArgumentException if this map is itself a subMap, |
1243 |
< |
* headMap, or tailMap, and <tt>toKey</tt> is not within the |
1244 |
< |
* specified range of the subMap, headMap, or tailMap. |
1245 |
< |
* @throws NullPointerException if <tt>toKey</tt> is <tt>null</tt> and |
1246 |
< |
* this map uses natural order, or its comparator does not |
1247 |
< |
* tolerate <tt>null</tt> keys. |
1248 |
< |
*/ |
1249 |
< |
public SortedMap<K,V> headMap(K toKey) { |
1250 |
< |
return new SubMap(toKey, true); |
1205 |
> |
final class ValueIterator extends PrivateEntryIterator<V> { |
1206 |
> |
ValueIterator(Entry<K,V> first) { |
1207 |
> |
super(first); |
1208 |
> |
} |
1209 |
> |
public V next() { |
1210 |
> |
return nextEntry().value; |
1211 |
> |
} |
1212 |
|
} |
1213 |
|
|
1214 |
< |
/** |
1215 |
< |
* Equivalent to <tt>navigableTailMap</tt> but with a return |
1216 |
< |
* type conforming to the <tt>SortedMap</tt> interface. |
1217 |
< |
* |
1218 |
< |
* @param fromKey low endpoint (inclusive) of the tailMap. |
1219 |
< |
* @return a view of the portion of this map whose keys are greater |
1220 |
< |
* than or equal to <tt>fromKey</tt>. |
1260 |
< |
* @throws ClassCastException if <tt>fromKey</tt> is not compatible |
1261 |
< |
* with this map's comparator (or, if the map has no comparator, |
1262 |
< |
* if <tt>fromKey</tt> does not implement <tt>Comparable</tt>). |
1263 |
< |
* @throws IllegalArgumentException if this map is itself a subMap, |
1264 |
< |
* headMap, or tailMap, and <tt>fromKey</tt> is not within the |
1265 |
< |
* specified range of the subMap, headMap, or tailMap. |
1266 |
< |
* @throws NullPointerException if <tt>fromKey</tt> is <tt>null</tt> and |
1267 |
< |
* this map uses natural order, or its comparator does not |
1268 |
< |
* tolerate <tt>null</tt> keys. |
1269 |
< |
*/ |
1270 |
< |
public SortedMap<K,V> tailMap(K fromKey) { |
1271 |
< |
return new SubMap(fromKey, false); |
1214 |
> |
final class KeyIterator extends PrivateEntryIterator<K> { |
1215 |
> |
KeyIterator(Entry<K,V> first) { |
1216 |
> |
super(first); |
1217 |
> |
} |
1218 |
> |
public K next() { |
1219 |
> |
return nextEntry().key; |
1220 |
> |
} |
1221 |
|
} |
1222 |
|
|
1223 |
< |
private class SubMap |
1224 |
< |
extends AbstractMap<K,V> |
1225 |
< |
implements NavigableMap<K,V>, java.io.Serializable { |
1226 |
< |
private static final long serialVersionUID = -6520786458950516097L; |
1223 |
> |
final class DescendingKeyIterator extends PrivateEntryIterator<K> { |
1224 |
> |
DescendingKeyIterator(Entry<K,V> first) { |
1225 |
> |
super(first); |
1226 |
> |
} |
1227 |
> |
public K next() { |
1228 |
> |
return prevEntry().key; |
1229 |
> |
} |
1230 |
> |
} |
1231 |
|
|
1232 |
< |
/** |
1233 |
< |
* fromKey is significant only if fromStart is false. Similarly, |
1234 |
< |
* toKey is significant only if toStart is false. |
1232 |
> |
// SubMaps |
1233 |
> |
|
1234 |
> |
static abstract class NavigableSubMap<K,V> extends AbstractMap<K,V> |
1235 |
> |
implements NavigableMap<K,V>, java.io.Serializable { |
1236 |
> |
|
1237 |
> |
/* |
1238 |
> |
* The backing map. |
1239 |
|
*/ |
1240 |
< |
private boolean fromStart = false, toEnd = false; |
1284 |
< |
private K fromKey, toKey; |
1240 |
> |
final TreeMap<K,V> m; |
1241 |
|
|
1242 |
< |
SubMap(K fromKey, K toKey) { |
1243 |
< |
if (compare(fromKey, toKey) > 0) |
1244 |
< |
throw new IllegalArgumentException("fromKey > toKey"); |
1245 |
< |
this.fromKey = fromKey; |
1246 |
< |
this.toKey = toKey; |
1247 |
< |
} |
1242 |
> |
/* |
1243 |
> |
* Endpoints are represented as triples (fromStart, lo, loExcluded) |
1244 |
> |
* and (toEnd, hi, hiExcluded). If fromStart is true, then |
1245 |
> |
* the low (absolute) bound is the start of the backing map, and the |
1246 |
> |
* other values are ignored. Otherwise, if loExcluded is |
1247 |
> |
* zero, lo is the inclusive bound, else loExcluded is one, |
1248 |
> |
* and lo is the exclusive bound. Similarly for the upper bound. |
1249 |
> |
*/ |
1250 |
|
|
1251 |
< |
SubMap(K key, boolean headMap) { |
1252 |
< |
compare(key, key); // Type-check key |
1253 |
< |
|
1254 |
< |
if (headMap) { |
1255 |
< |
fromStart = true; |
1256 |
< |
toKey = key; |
1257 |
< |
} else { |
1258 |
< |
toEnd = true; |
1259 |
< |
fromKey = key; |
1260 |
< |
} |
1261 |
< |
} |
1251 |
> |
final K lo, hi; |
1252 |
> |
final boolean fromStart, toEnd; |
1253 |
> |
final int loExcluded, hiExcluded; |
1254 |
> |
|
1255 |
> |
NavigableSubMap(TreeMap<K,V> m, |
1256 |
> |
boolean fromStart, K lo, int loExcluded, |
1257 |
> |
boolean toEnd, K hi, int hiExcluded) { |
1258 |
> |
if (!fromStart && !toEnd) { |
1259 |
> |
if (m.compare(lo, hi) > 0) |
1260 |
> |
throw new IllegalArgumentException("fromKey > toKey"); |
1261 |
> |
} |
1262 |
> |
else if (!fromStart) // type check |
1263 |
> |
m.compare(lo, lo); |
1264 |
> |
else if (!toEnd) |
1265 |
> |
m.compare(hi, hi); |
1266 |
|
|
1267 |
< |
SubMap(boolean fromStart, K fromKey, boolean toEnd, K toKey) { |
1267 |
> |
this.m = m; |
1268 |
|
this.fromStart = fromStart; |
1269 |
< |
this.fromKey= fromKey; |
1269 |
> |
this.lo = lo; |
1270 |
> |
this.loExcluded = loExcluded; |
1271 |
|
this.toEnd = toEnd; |
1272 |
< |
this.toKey = toKey; |
1272 |
> |
this.hi = hi; |
1273 |
> |
this.hiExcluded = hiExcluded; |
1274 |
|
} |
1275 |
|
|
1276 |
< |
public boolean isEmpty() { |
1277 |
< |
return entrySet.isEmpty(); |
1276 |
> |
// internal utilities |
1277 |
> |
|
1278 |
> |
final boolean inRange(Object key) { |
1279 |
> |
return (fromStart || m.compare(key, lo) >= loExcluded) |
1280 |
> |
&& (toEnd || m.compare(hi, key) >= hiExcluded); |
1281 |
|
} |
1282 |
|
|
1283 |
< |
public boolean containsKey(Object key) { |
1284 |
< |
return inRange((K) key) && TreeMap.this.containsKey(key); |
1283 |
> |
final boolean inClosedRange(Object key) { |
1284 |
> |
return (fromStart || m.compare(key, lo) >= 0) |
1285 |
> |
&& (toEnd || m.compare(hi, key) >= 0); |
1286 |
|
} |
1287 |
|
|
1288 |
< |
public V get(Object key) { |
1289 |
< |
if (!inRange((K) key)) |
1322 |
< |
return null; |
1323 |
< |
return TreeMap.this.get(key); |
1288 |
> |
final boolean inRange(Object key, boolean inclusive) { |
1289 |
> |
return inclusive ? inRange(key) : inClosedRange(key); |
1290 |
|
} |
1291 |
|
|
1292 |
< |
public V put(K key, V value) { |
1293 |
< |
if (!inRange(key)) |
1328 |
< |
throw new IllegalArgumentException("key out of range"); |
1329 |
< |
return TreeMap.this.put(key, value); |
1292 |
> |
final boolean tooLow(K key) { |
1293 |
> |
return !fromStart && m.compare(key, lo) < loExcluded; |
1294 |
|
} |
1295 |
|
|
1296 |
< |
public V remove(Object key) { |
1297 |
< |
if (!inRange((K) key)) |
1334 |
< |
return null; |
1335 |
< |
return TreeMap.this.remove(key); |
1296 |
> |
final boolean tooHigh(K key) { |
1297 |
> |
return !toEnd && m.compare(hi, key) < hiExcluded; |
1298 |
|
} |
1299 |
|
|
1300 |
< |
public Comparator<? super K> comparator() { |
1301 |
< |
return comparator; |
1300 |
> |
/** Returns the lowest entry in this submap (absolute ordering) */ |
1301 |
> |
final TreeMap.Entry<K,V> loEntry() { |
1302 |
> |
TreeMap.Entry<K,V> result = |
1303 |
> |
(fromStart ? m.getFirstEntry() : |
1304 |
> |
(loExcluded == 0 ? m.getCeilingEntry(lo) : |
1305 |
> |
m.getHigherEntry(lo))); |
1306 |
> |
return (result == null || tooHigh(result.key)) ? null : result; |
1307 |
|
} |
1308 |
|
|
1309 |
< |
public K firstKey() { |
1310 |
< |
TreeMap.Entry<K,V> e = fromStart ? getFirstEntry() : getCeilingEntry(fromKey); |
1311 |
< |
K first = key(e); |
1312 |
< |
if (!toEnd && compare(first, toKey) >= 0) |
1313 |
< |
throw(new NoSuchElementException()); |
1314 |
< |
return first; |
1309 |
> |
/** Returns the highest key in this submap (absolute ordering) */ |
1310 |
> |
final TreeMap.Entry<K,V> hiEntry() { |
1311 |
> |
TreeMap.Entry<K,V> result = |
1312 |
> |
(toEnd ? m.getLastEntry() : |
1313 |
> |
(hiExcluded == 0 ? m.getFloorEntry(hi) : |
1314 |
> |
m.getLowerEntry(hi))); |
1315 |
> |
return (result == null || tooLow(result.key)) ? null : result; |
1316 |
|
} |
1317 |
|
|
1318 |
< |
public K lastKey() { |
1319 |
< |
TreeMap.Entry<K,V> e = toEnd ? getLastEntry() : getLowerEntry(toKey); |
1320 |
< |
K last = key(e); |
1321 |
< |
if (!fromStart && compare(last, fromKey) < 0) |
1322 |
< |
throw(new NoSuchElementException()); |
1323 |
< |
return last; |
1318 |
> |
/** Polls the lowest entry in this submap (absolute ordering) */ |
1319 |
> |
final Map.Entry<K,V> pollLoEntry() { |
1320 |
> |
TreeMap.Entry<K,V> e = loEntry(); |
1321 |
> |
if (e == null) |
1322 |
> |
return null; |
1323 |
> |
Map.Entry<K,V> result = new AbstractMap.SimpleImmutableEntry<K,V>(e); |
1324 |
> |
m.deleteEntry(e); |
1325 |
> |
return result; |
1326 |
|
} |
1327 |
|
|
1328 |
< |
public Map.Entry<K,V> firstEntry() { |
1329 |
< |
TreeMap.Entry<K,V> e = fromStart ? |
1330 |
< |
getFirstEntry() : getCeilingEntry(fromKey); |
1331 |
< |
if (e == null || (!toEnd && compare(e.key, toKey) >= 0)) |
1328 |
> |
/** Polls the highest key in this submap (absolute ordering) */ |
1329 |
> |
final Map.Entry<K,V> pollHiEntry() { |
1330 |
> |
TreeMap.Entry<K,V> e = hiEntry(); |
1331 |
> |
if (e == null) |
1332 |
|
return null; |
1333 |
< |
return e; |
1333 |
> |
Map.Entry<K,V> result = new AbstractMap.SimpleImmutableEntry<K,V>(e); |
1334 |
> |
m.deleteEntry(e); |
1335 |
> |
return result; |
1336 |
|
} |
1337 |
|
|
1338 |
< |
public Map.Entry<K,V> lastEntry() { |
1339 |
< |
TreeMap.Entry<K,V> e = toEnd ? |
1340 |
< |
getLastEntry() : getLowerEntry(toKey); |
1341 |
< |
if (e == null || (!fromStart && compare(e.key, fromKey) < 0)) |
1338 |
> |
/** |
1339 |
> |
* Return the absolute high fence for ascending traversal |
1340 |
> |
*/ |
1341 |
> |
final TreeMap.Entry<K,V> hiFence() { |
1342 |
> |
if (toEnd) |
1343 |
|
return null; |
1344 |
< |
return e; |
1344 |
> |
else if (hiExcluded == 0) |
1345 |
> |
return m.getHigherEntry(hi); |
1346 |
> |
else |
1347 |
> |
return m.getCeilingEntry(hi); |
1348 |
|
} |
1349 |
|
|
1350 |
< |
public Map.Entry<K,V> pollFirstEntry() { |
1351 |
< |
TreeMap.Entry<K,V> e = fromStart ? |
1352 |
< |
getFirstEntry() : getCeilingEntry(fromKey); |
1353 |
< |
if (e == null || (!fromStart && compare(e.key, fromKey) < 0)) |
1350 |
> |
/** |
1351 |
> |
* Return the absolute low fence for descending traversal |
1352 |
> |
*/ |
1353 |
> |
final TreeMap.Entry<K,V> loFence() { |
1354 |
> |
if (fromStart) |
1355 |
|
return null; |
1356 |
< |
Map.Entry result = new AbstractMap.SimpleImmutableEntry(e); |
1357 |
< |
deleteEntry(e); |
1358 |
< |
return result; |
1356 |
> |
else if (loExcluded == 0) |
1357 |
> |
return m.getLowerEntry(lo); |
1358 |
> |
else |
1359 |
> |
return m.getFloorEntry(lo); |
1360 |
|
} |
1361 |
|
|
1362 |
< |
public Map.Entry<K,V> pollLastEntry() { |
1363 |
< |
TreeMap.Entry<K,V> e = toEnd ? |
1364 |
< |
getLastEntry() : getLowerEntry(toKey); |
1365 |
< |
if (e == null || (!toEnd && compare(e.key, toKey) >= 0)) |
1362 |
> |
|
1363 |
> |
public boolean isEmpty() { |
1364 |
> |
return entrySet().isEmpty(); |
1365 |
> |
} |
1366 |
> |
|
1367 |
> |
public boolean containsKey(Object key) { |
1368 |
> |
return inRange(key) && m.containsKey(key); |
1369 |
> |
} |
1370 |
> |
|
1371 |
> |
public V get(Object key) { |
1372 |
> |
if (!inRange(key)) |
1373 |
|
return null; |
1374 |
< |
Map.Entry result = new AbstractMap.SimpleImmutableEntry(e); |
1375 |
< |
deleteEntry(e); |
1376 |
< |
return result; |
1374 |
> |
return m.get(key); |
1375 |
> |
} |
1376 |
> |
|
1377 |
> |
public V put(K key, V value) { |
1378 |
> |
if (!inRange(key)) |
1379 |
> |
throw new IllegalArgumentException("key out of range"); |
1380 |
> |
return m.put(key, value); |
1381 |
|
} |
1382 |
|
|
1383 |
< |
private TreeMap.Entry<K,V> subceiling(K key) { |
1384 |
< |
TreeMap.Entry<K,V> e = (!fromStart && compare(key, fromKey) < 0)? |
1396 |
< |
getCeilingEntry(fromKey) : getCeilingEntry(key); |
1397 |
< |
if (e == null || (!toEnd && compare(e.key, toKey) >= 0)) |
1383 |
> |
public V remove(Object key) { |
1384 |
> |
if (!inRange(key)) |
1385 |
|
return null; |
1386 |
< |
return e; |
1386 |
> |
return m.remove(key); |
1387 |
|
} |
1388 |
|
|
1389 |
|
public Map.Entry<K,V> ceilingEntry(K key) { |
1390 |
< |
TreeMap.Entry<K,V> e = subceiling(key); |
1391 |
< |
return e == null? null : new AbstractMap.SimpleImmutableEntry(e); |
1390 |
> |
TreeMap.Entry<K,V> e = subCeiling(key); |
1391 |
> |
return e == null? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
1392 |
|
} |
1393 |
|
|
1394 |
|
public K ceilingKey(K key) { |
1395 |
< |
TreeMap.Entry<K,V> e = subceiling(key); |
1395 |
> |
TreeMap.Entry<K,V> e = subCeiling(key); |
1396 |
|
return e == null? null : e.key; |
1397 |
|
} |
1398 |
|
|
1412 |
– |
|
1413 |
– |
private TreeMap.Entry<K,V> subhigher(K key) { |
1414 |
– |
TreeMap.Entry<K,V> e = (!fromStart && compare(key, fromKey) < 0)? |
1415 |
– |
getCeilingEntry(fromKey) : getHigherEntry(key); |
1416 |
– |
if (e == null || (!toEnd && compare(e.key, toKey) >= 0)) |
1417 |
– |
return null; |
1418 |
– |
return e; |
1419 |
– |
} |
1420 |
– |
|
1399 |
|
public Map.Entry<K,V> higherEntry(K key) { |
1400 |
< |
TreeMap.Entry<K,V> e = subhigher(key); |
1401 |
< |
return e == null? null : new AbstractMap.SimpleImmutableEntry(e); |
1400 |
> |
TreeMap.Entry<K,V> e = subHigher(key); |
1401 |
> |
return e == null? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
1402 |
|
} |
1403 |
|
|
1404 |
|
public K higherKey(K key) { |
1405 |
< |
TreeMap.Entry<K,V> e = subhigher(key); |
1405 |
> |
TreeMap.Entry<K,V> e = subHigher(key); |
1406 |
|
return e == null? null : e.key; |
1407 |
|
} |
1408 |
|
|
1431 |
– |
private TreeMap.Entry<K,V> subfloor(K key) { |
1432 |
– |
TreeMap.Entry<K,V> e = (!toEnd && compare(key, toKey) >= 0)? |
1433 |
– |
getLowerEntry(toKey) : getFloorEntry(key); |
1434 |
– |
if (e == null || (!fromStart && compare(e.key, fromKey) < 0)) |
1435 |
– |
return null; |
1436 |
– |
return e; |
1437 |
– |
} |
1438 |
– |
|
1409 |
|
public Map.Entry<K,V> floorEntry(K key) { |
1410 |
< |
TreeMap.Entry<K,V> e = subfloor(key); |
1411 |
< |
return e == null? null : new AbstractMap.SimpleImmutableEntry(e); |
1410 |
> |
TreeMap.Entry<K,V> e = subFloor(key); |
1411 |
> |
return e == null? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
1412 |
|
} |
1413 |
|
|
1414 |
|
public K floorKey(K key) { |
1415 |
< |
TreeMap.Entry<K,V> e = subfloor(key); |
1415 |
> |
TreeMap.Entry<K,V> e = subFloor(key); |
1416 |
|
return e == null? null : e.key; |
1417 |
|
} |
1418 |
|
|
1449 |
– |
private TreeMap.Entry<K,V> sublower(K key) { |
1450 |
– |
TreeMap.Entry<K,V> e = (!toEnd && compare(key, toKey) >= 0)? |
1451 |
– |
getLowerEntry(toKey) : getLowerEntry(key); |
1452 |
– |
if (e == null || (!fromStart && compare(e.key, fromKey) < 0)) |
1453 |
– |
return null; |
1454 |
– |
return e; |
1455 |
– |
} |
1456 |
– |
|
1419 |
|
public Map.Entry<K,V> lowerEntry(K key) { |
1420 |
< |
TreeMap.Entry<K,V> e = sublower(key); |
1421 |
< |
return e == null? null : new AbstractMap.SimpleImmutableEntry(e); |
1420 |
> |
TreeMap.Entry<K,V> e = subLower(key); |
1421 |
> |
return e == null? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
1422 |
|
} |
1423 |
|
|
1424 |
|
public K lowerKey(K key) { |
1425 |
< |
TreeMap.Entry<K,V> e = sublower(key); |
1425 |
> |
TreeMap.Entry<K,V> e = subLower(key); |
1426 |
|
return e == null? null : e.key; |
1427 |
|
} |
1428 |
|
|
1429 |
< |
private transient Set<Map.Entry<K,V>> entrySet = new EntrySetView(); |
1429 |
> |
abstract Iterator<K> keyIterator(); |
1430 |
> |
abstract Iterator<K> descendingKeyIterator(); |
1431 |
|
|
1432 |
< |
public Set<Map.Entry<K,V>> entrySet() { |
1433 |
< |
return entrySet; |
1432 |
> |
public NavigableSet<K> descendingKeySet() { |
1433 |
> |
return descendingMap().navigableKeySet(); |
1434 |
|
} |
1435 |
|
|
1436 |
< |
private class EntrySetView extends AbstractSet<Map.Entry<K,V>> { |
1436 |
> |
// Views |
1437 |
> |
transient NavigableMap<K,V> descendingMapView = null; |
1438 |
> |
transient EntrySetView entrySetView = null; |
1439 |
> |
transient KeySet<K> navigableKeySetView = null; |
1440 |
> |
|
1441 |
> |
abstract class EntrySetView extends AbstractSet<Map.Entry<K,V>> { |
1442 |
|
private transient int size = -1, sizeModCount; |
1443 |
|
|
1444 |
|
public int size() { |
1445 |
< |
if (size == -1 || sizeModCount != TreeMap.this.modCount) { |
1446 |
< |
size = 0; sizeModCount = TreeMap.this.modCount; |
1445 |
> |
if (fromStart && toEnd) |
1446 |
> |
return m.size(); |
1447 |
> |
if (size == -1 || sizeModCount != m.modCount) { |
1448 |
> |
sizeModCount = m.modCount; |
1449 |
> |
size = 0; |
1450 |
|
Iterator i = iterator(); |
1451 |
|
while (i.hasNext()) { |
1452 |
|
size++; |
1457 |
|
} |
1458 |
|
|
1459 |
|
public boolean isEmpty() { |
1460 |
< |
return !iterator().hasNext(); |
1460 |
> |
TreeMap.Entry<K,V> n = loEntry(); |
1461 |
> |
return n == null || tooHigh(n.key); |
1462 |
|
} |
1463 |
|
|
1464 |
|
public boolean contains(Object o) { |
1468 |
|
K key = entry.getKey(); |
1469 |
|
if (!inRange(key)) |
1470 |
|
return false; |
1471 |
< |
TreeMap.Entry node = getEntry(key); |
1471 |
> |
TreeMap.Entry node = m.getEntry(key); |
1472 |
|
return node != null && |
1473 |
< |
valEquals(node.getValue(), entry.getValue()); |
1473 |
> |
valEquals(node.getValue(), entry.getValue()); |
1474 |
|
} |
1475 |
|
|
1476 |
|
public boolean remove(Object o) { |
1480 |
|
K key = entry.getKey(); |
1481 |
|
if (!inRange(key)) |
1482 |
|
return false; |
1483 |
< |
TreeMap.Entry<K,V> node = getEntry(key); |
1483 |
> |
TreeMap.Entry<K,V> node = m.getEntry(key); |
1484 |
|
if (node!=null && valEquals(node.getValue(),entry.getValue())){ |
1485 |
< |
deleteEntry(node); |
1485 |
> |
m.deleteEntry(node); |
1486 |
|
return true; |
1487 |
|
} |
1488 |
|
return false; |
1489 |
|
} |
1490 |
+ |
} |
1491 |
|
|
1492 |
< |
public Iterator<Map.Entry<K,V>> iterator() { |
1493 |
< |
return new SubMapEntryIterator( |
1494 |
< |
(fromStart ? getFirstEntry() : getCeilingEntry(fromKey)), |
1495 |
< |
(toEnd ? null : getCeilingEntry(toKey))); |
1523 |
< |
} |
1492 |
> |
public NavigableSet<K> navigableKeySet() { |
1493 |
> |
KeySet<K> nksv = navigableKeySetView; |
1494 |
> |
return (nksv != null) ? nksv : |
1495 |
> |
(navigableKeySetView = new TreeMap.KeySet(this)); |
1496 |
|
} |
1497 |
|
|
1498 |
< |
private transient Set<Map.Entry<K,V>> descendingEntrySetView = null; |
1499 |
< |
private transient Set<K> descendingKeySetView = null; |
1498 |
> |
public Set<K> keySet() { |
1499 |
> |
return navigableKeySet(); |
1500 |
> |
} |
1501 |
|
|
1502 |
< |
public Set<Map.Entry<K,V>> descendingEntrySet() { |
1503 |
< |
Set<Map.Entry<K,V>> es = descendingEntrySetView; |
1531 |
< |
return (es != null) ? es : (descendingEntrySetView = new DescendingEntrySetView()); |
1502 |
> |
public SortedMap<K,V> subMap(K fromKey, K toKey) { |
1503 |
> |
return subMap(fromKey, true, toKey, false); |
1504 |
|
} |
1505 |
|
|
1506 |
< |
public Set<K> descendingKeySet() { |
1507 |
< |
Set<K> ks = descendingKeySetView; |
1536 |
< |
return (ks != null) ? ks : (descendingKeySetView = new DescendingKeySetView()); |
1506 |
> |
public SortedMap<K,V> headMap(K toKey) { |
1507 |
> |
return headMap(toKey, false); |
1508 |
|
} |
1509 |
|
|
1510 |
< |
private class DescendingEntrySetView extends EntrySetView { |
1511 |
< |
public Iterator<Map.Entry<K,V>> iterator() { |
1512 |
< |
return new DescendingSubMapEntryIterator |
1513 |
< |
((toEnd ? getLastEntry() : getLowerEntry(toKey)), |
1514 |
< |
(fromStart ? null : getLowerEntry(fromKey))); |
1510 |
> |
public SortedMap<K,V> tailMap(K fromKey) { |
1511 |
> |
return tailMap(fromKey, true); |
1512 |
> |
} |
1513 |
> |
|
1514 |
> |
// The following four definitions are correct only for |
1515 |
> |
// ascending submaps. They are overridden in DescendingSubMap. |
1516 |
> |
// They are defined in the base class because the definitions |
1517 |
> |
// in DescendingSubMap rely on those for AscendingSubMap. |
1518 |
> |
|
1519 |
> |
/** |
1520 |
> |
* Returns the entry corresponding to the ceiling of the specified |
1521 |
> |
* key from the perspective of this submap, or null if the submap |
1522 |
> |
* contains no such entry. |
1523 |
> |
*/ |
1524 |
> |
TreeMap.Entry<K,V> subCeiling(K key) { |
1525 |
> |
if (tooLow(key)) |
1526 |
> |
return loEntry(); |
1527 |
> |
TreeMap.Entry<K,V> e = m.getCeilingEntry(key); |
1528 |
> |
return (e == null || tooHigh(e.key)) ? null : e; |
1529 |
> |
} |
1530 |
> |
|
1531 |
> |
/** |
1532 |
> |
* Returns the entry corresponding to the higher of the specified |
1533 |
> |
* key from the perspective of this submap, or null if the submap |
1534 |
> |
* contains no such entry. |
1535 |
> |
*/ |
1536 |
> |
TreeMap.Entry<K,V> subHigher(K key) { |
1537 |
> |
if (tooLow(key)) |
1538 |
> |
return loEntry(); |
1539 |
> |
TreeMap.Entry<K,V> e = m.getHigherEntry(key); |
1540 |
> |
return (e == null || tooHigh(e.key)) ? null : e; |
1541 |
> |
} |
1542 |
> |
|
1543 |
> |
/** |
1544 |
> |
* Returns the entry corresponding to the floor of the specified |
1545 |
> |
* key from the perspective of this submap, or null if the submap |
1546 |
> |
* contains no such entry. |
1547 |
> |
*/ |
1548 |
> |
TreeMap.Entry<K,V> subFloor(K key) { |
1549 |
> |
if (tooHigh(key)) |
1550 |
> |
return hiEntry(); |
1551 |
> |
TreeMap.Entry<K,V> e = m.getFloorEntry(key); |
1552 |
> |
return (e == null || tooLow(e.key)) ? null : e; |
1553 |
> |
} |
1554 |
> |
|
1555 |
> |
/** |
1556 |
> |
* Returns the entry corresponding to the lower of the specified |
1557 |
> |
* key from the perspective of this submap, or null if the submap |
1558 |
> |
* contains no such entry. |
1559 |
> |
*/ |
1560 |
> |
TreeMap.Entry<K,V> subLower(K key) { |
1561 |
> |
if (tooHigh(key)) |
1562 |
> |
return hiEntry(); |
1563 |
> |
TreeMap.Entry<K,V> e = m.getLowerEntry(key); |
1564 |
> |
return (e == null || tooLow(e.key)) ? null : e; |
1565 |
> |
} |
1566 |
> |
|
1567 |
> |
/** |
1568 |
> |
* Iterators for SubMaps |
1569 |
> |
*/ |
1570 |
> |
abstract class SubMapIterator<T> implements Iterator<T> { |
1571 |
> |
TreeMap.Entry<K,V> lastReturned; |
1572 |
> |
TreeMap.Entry<K,V> next; |
1573 |
> |
final K fenceKey; |
1574 |
> |
int expectedModCount; |
1575 |
> |
|
1576 |
> |
SubMapIterator(TreeMap.Entry<K,V> first, |
1577 |
> |
TreeMap.Entry<K,V> fence) { |
1578 |
> |
expectedModCount = m.modCount; |
1579 |
> |
lastReturned = null; |
1580 |
> |
next = first; |
1581 |
> |
fenceKey = fence == null ? null : fence.key; |
1582 |
> |
} |
1583 |
> |
|
1584 |
> |
public final boolean hasNext() { |
1585 |
> |
return next != null && next.key != fenceKey; |
1586 |
> |
} |
1587 |
> |
|
1588 |
> |
final TreeMap.Entry<K,V> nextEntry() { |
1589 |
> |
TreeMap.Entry<K,V> e = lastReturned = next; |
1590 |
> |
if (e == null || e.key == fenceKey) |
1591 |
> |
throw new NoSuchElementException(); |
1592 |
> |
if (m.modCount != expectedModCount) |
1593 |
> |
throw new ConcurrentModificationException(); |
1594 |
> |
next = successor(e); |
1595 |
> |
return e; |
1596 |
> |
} |
1597 |
> |
|
1598 |
> |
final TreeMap.Entry<K,V> prevEntry() { |
1599 |
> |
TreeMap.Entry<K,V> e = lastReturned = next; |
1600 |
> |
if (e == null || e.key == fenceKey) |
1601 |
> |
throw new NoSuchElementException(); |
1602 |
> |
if (m.modCount != expectedModCount) |
1603 |
> |
throw new ConcurrentModificationException(); |
1604 |
> |
next = predecessor(e); |
1605 |
> |
return e; |
1606 |
> |
} |
1607 |
> |
|
1608 |
> |
public void remove() { |
1609 |
> |
if (lastReturned == null) |
1610 |
> |
throw new IllegalStateException(); |
1611 |
> |
if (m.modCount != expectedModCount) |
1612 |
> |
throw new ConcurrentModificationException(); |
1613 |
> |
if (lastReturned.left != null && lastReturned.right != null) |
1614 |
> |
next = lastReturned; |
1615 |
> |
m.deleteEntry(lastReturned); |
1616 |
> |
expectedModCount++; |
1617 |
> |
lastReturned = null; |
1618 |
|
} |
1619 |
|
} |
1620 |
|
|
1621 |
< |
private class DescendingKeySetView extends AbstractSet<K> { |
1622 |
< |
public Iterator<K> iterator() { |
1623 |
< |
return new Iterator<K>() { |
1624 |
< |
private Iterator<Entry<K,V>> i = descendingEntrySet().iterator(); |
1551 |
< |
|
1552 |
< |
public boolean hasNext() { return i.hasNext(); } |
1553 |
< |
public K next() { return i.next().getKey(); } |
1554 |
< |
public void remove() { i.remove(); } |
1555 |
< |
}; |
1621 |
> |
final class SubMapEntryIterator extends SubMapIterator<Map.Entry<K,V>> { |
1622 |
> |
SubMapEntryIterator(TreeMap.Entry<K,V> first, |
1623 |
> |
TreeMap.Entry<K,V> fence) { |
1624 |
> |
super(first, fence); |
1625 |
|
} |
1626 |
< |
|
1627 |
< |
public int size() { |
1559 |
< |
return SubMap.this.size(); |
1626 |
> |
public Map.Entry<K,V> next() { |
1627 |
> |
return nextEntry(); |
1628 |
|
} |
1629 |
< |
|
1630 |
< |
public boolean contains(Object k) { |
1631 |
< |
return SubMap.this.containsKey(k); |
1629 |
> |
} |
1630 |
> |
|
1631 |
> |
final class SubMapKeyIterator extends SubMapIterator<K> { |
1632 |
> |
SubMapKeyIterator(TreeMap.Entry<K,V> first, |
1633 |
> |
TreeMap.Entry<K,V> fence) { |
1634 |
> |
super(first, fence); |
1635 |
> |
} |
1636 |
> |
public K next() { |
1637 |
> |
return nextEntry().key; |
1638 |
> |
} |
1639 |
> |
} |
1640 |
> |
|
1641 |
> |
final class DescendingSubMapEntryIterator extends SubMapIterator<Map.Entry<K,V>> { |
1642 |
> |
DescendingSubMapEntryIterator(TreeMap.Entry<K,V> last, |
1643 |
> |
TreeMap.Entry<K,V> lastExcluded) { |
1644 |
> |
super(last, lastExcluded); |
1645 |
> |
} |
1646 |
> |
|
1647 |
> |
public Map.Entry<K,V> next() { |
1648 |
> |
return prevEntry(); |
1649 |
> |
} |
1650 |
> |
} |
1651 |
> |
|
1652 |
> |
final class DescendingSubMapKeyIterator extends SubMapIterator<K> { |
1653 |
> |
DescendingSubMapKeyIterator(TreeMap.Entry<K,V> last, |
1654 |
> |
TreeMap.Entry<K,V> lastExcluded) { |
1655 |
> |
super(last, lastExcluded); |
1656 |
|
} |
1657 |
+ |
public K next() { |
1658 |
+ |
return prevEntry().key; |
1659 |
+ |
} |
1660 |
+ |
} |
1661 |
+ |
} |
1662 |
+ |
|
1663 |
+ |
static class AscendingSubMap<K,V> extends NavigableSubMap<K,V> { |
1664 |
+ |
private static final long serialVersionUID = 912986545866124060L; |
1665 |
+ |
|
1666 |
+ |
AscendingSubMap(TreeMap<K,V> m, |
1667 |
+ |
boolean fromStart, K lo, int loExcluded, |
1668 |
+ |
boolean toEnd, K hi, int hiExcluded) { |
1669 |
+ |
super(m, fromStart, lo, loExcluded, toEnd, hi, hiExcluded); |
1670 |
|
} |
1671 |
|
|
1672 |
+ |
public Comparator<? super K> comparator() { |
1673 |
+ |
return m.comparator(); |
1674 |
+ |
} |
1675 |
|
|
1676 |
< |
public NavigableMap<K,V> navigableSubMap(K fromKey, K toKey) { |
1677 |
< |
if (!inRange2(fromKey)) |
1676 |
> |
public NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive, |
1677 |
> |
K toKey, boolean toInclusive) { |
1678 |
> |
if (!inRange(fromKey, fromInclusive)) |
1679 |
|
throw new IllegalArgumentException("fromKey out of range"); |
1680 |
< |
if (!inRange2(toKey)) |
1680 |
> |
if (!inRange(toKey, toInclusive)) |
1681 |
|
throw new IllegalArgumentException("toKey out of range"); |
1682 |
< |
return new SubMap(fromKey, toKey); |
1682 |
> |
return new AscendingSubMap(m, |
1683 |
> |
false, fromKey, excluded(fromInclusive), |
1684 |
> |
false, toKey, excluded(toInclusive)); |
1685 |
|
} |
1686 |
|
|
1687 |
< |
public NavigableMap<K,V> navigableHeadMap(K toKey) { |
1688 |
< |
if (!inRange2(toKey)) |
1687 |
> |
public NavigableMap<K,V> headMap(K toKey, boolean inclusive) { |
1688 |
> |
if (!inClosedRange(toKey)) |
1689 |
|
throw new IllegalArgumentException("toKey out of range"); |
1690 |
< |
return new SubMap(fromStart, fromKey, false, toKey); |
1690 |
> |
return new AscendingSubMap(m, |
1691 |
> |
fromStart, lo, loExcluded, |
1692 |
> |
false, toKey, excluded(inclusive)); |
1693 |
|
} |
1694 |
|
|
1695 |
< |
public NavigableMap<K,V> navigableTailMap(K fromKey) { |
1696 |
< |
if (!inRange2(fromKey)) |
1695 |
> |
public NavigableMap<K,V> tailMap(K fromKey, boolean inclusive){ |
1696 |
> |
if (!inRange(fromKey, inclusive)) |
1697 |
|
throw new IllegalArgumentException("fromKey out of range"); |
1698 |
< |
return new SubMap(false, fromKey, toEnd, toKey); |
1698 |
> |
return new AscendingSubMap(m, |
1699 |
> |
false, fromKey, excluded(inclusive), |
1700 |
> |
toEnd, hi, hiExcluded); |
1701 |
|
} |
1702 |
|
|
1703 |
< |
|
1704 |
< |
public SortedMap<K,V> subMap(K fromKey, K toKey) { |
1590 |
< |
return navigableSubMap(fromKey, toKey); |
1703 |
> |
Iterator<K> keyIterator() { |
1704 |
> |
return new SubMapKeyIterator(loEntry(), hiFence()); |
1705 |
|
} |
1706 |
|
|
1707 |
< |
public SortedMap<K,V> headMap(K toKey) { |
1708 |
< |
return navigableHeadMap(toKey); |
1707 |
> |
Iterator<K> descendingKeyIterator() { |
1708 |
> |
return new DescendingSubMapKeyIterator(hiEntry(), loFence()); |
1709 |
|
} |
1710 |
|
|
1711 |
< |
public SortedMap<K,V> tailMap(K fromKey) { |
1712 |
< |
return navigableTailMap(fromKey); |
1711 |
> |
class AscendingEntrySetView extends NavigableSubMap.EntrySetView { |
1712 |
> |
public Iterator<Map.Entry<K,V>> iterator() { |
1713 |
> |
return new SubMapEntryIterator(loEntry(), hiFence()); |
1714 |
> |
} |
1715 |
|
} |
1716 |
|
|
1717 |
< |
private boolean inRange(K key) { |
1718 |
< |
return (fromStart || compare(key, fromKey) >= 0) && |
1719 |
< |
(toEnd || compare(key, toKey) < 0); |
1717 |
> |
public Set<Map.Entry<K,V>> entrySet() { |
1718 |
> |
EntrySetView es = entrySetView; |
1719 |
> |
return (es != null) ? es : new AscendingEntrySetView(); |
1720 |
|
} |
1721 |
|
|
1722 |
< |
// This form allows the high endpoint (as well as all legit keys) |
1723 |
< |
private boolean inRange2(K key) { |
1608 |
< |
return (fromStart || compare(key, fromKey) >= 0) && |
1609 |
< |
(toEnd || compare(key, toKey) <= 0); |
1722 |
> |
public K firstKey() { |
1723 |
> |
return key(loEntry()); |
1724 |
|
} |
1611 |
– |
} |
1612 |
– |
|
1613 |
– |
/** |
1614 |
– |
* TreeMap Iterator. |
1615 |
– |
*/ |
1616 |
– |
abstract class PrivateEntryIterator<T> implements Iterator<T> { |
1617 |
– |
int expectedModCount = TreeMap.this.modCount; |
1618 |
– |
Entry<K,V> lastReturned = null; |
1619 |
– |
Entry<K,V> next; |
1725 |
|
|
1726 |
< |
PrivateEntryIterator(Entry<K,V> first) { |
1727 |
< |
next = first; |
1726 |
> |
public K lastKey() { |
1727 |
> |
return key(hiEntry()); |
1728 |
|
} |
1729 |
|
|
1730 |
< |
public boolean hasNext() { |
1731 |
< |
return next != null; |
1730 |
> |
public Map.Entry<K,V> firstEntry() { |
1731 |
> |
return loEntry(); |
1732 |
|
} |
1733 |
|
|
1734 |
< |
Entry<K,V> nextEntry() { |
1735 |
< |
if (next == null) |
1631 |
< |
throw new NoSuchElementException(); |
1632 |
< |
if (modCount != expectedModCount) |
1633 |
< |
throw new ConcurrentModificationException(); |
1634 |
< |
lastReturned = next; |
1635 |
< |
next = successor(next); |
1636 |
< |
return lastReturned; |
1734 |
> |
public Map.Entry<K,V> lastEntry() { |
1735 |
> |
return hiEntry(); |
1736 |
|
} |
1737 |
|
|
1738 |
< |
public void remove() { |
1739 |
< |
if (lastReturned == null) |
1641 |
< |
throw new IllegalStateException(); |
1642 |
< |
if (modCount != expectedModCount) |
1643 |
< |
throw new ConcurrentModificationException(); |
1644 |
< |
if (lastReturned.left != null && lastReturned.right != null) |
1645 |
< |
next = lastReturned; |
1646 |
< |
deleteEntry(lastReturned); |
1647 |
< |
expectedModCount++; |
1648 |
< |
lastReturned = null; |
1738 |
> |
public Map.Entry<K,V> pollFirstEntry() { |
1739 |
> |
return pollLoEntry(); |
1740 |
|
} |
1650 |
– |
} |
1741 |
|
|
1742 |
< |
class EntryIterator extends PrivateEntryIterator<Map.Entry<K,V>> { |
1743 |
< |
EntryIterator(Entry<K,V> first) { |
1654 |
< |
super(first); |
1742 |
> |
public Map.Entry<K,V> pollLastEntry() { |
1743 |
> |
return pollHiEntry(); |
1744 |
|
} |
1745 |
|
|
1746 |
< |
public Map.Entry<K,V> next() { |
1747 |
< |
return nextEntry(); |
1746 |
> |
public NavigableMap<K,V> descendingMap() { |
1747 |
> |
NavigableMap<K,V> mv = descendingMapView; |
1748 |
> |
return (mv != null) ? mv : |
1749 |
> |
(descendingMapView = |
1750 |
> |
new DescendingSubMap(m, |
1751 |
> |
fromStart, lo, loExcluded, |
1752 |
> |
toEnd, hi, hiExcluded)); |
1753 |
|
} |
1754 |
|
} |
1755 |
|
|
1756 |
< |
class KeyIterator extends PrivateEntryIterator<K> { |
1757 |
< |
KeyIterator(Entry<K,V> first) { |
1758 |
< |
super(first); |
1759 |
< |
} |
1760 |
< |
public K next() { |
1761 |
< |
return nextEntry().key; |
1756 |
> |
static class DescendingSubMap<K,V> extends NavigableSubMap<K,V> { |
1757 |
> |
private static final long serialVersionUID = 912986545866120460L; |
1758 |
> |
DescendingSubMap(TreeMap<K,V> m, |
1759 |
> |
boolean fromStart, K lo, int loExcluded, |
1760 |
> |
boolean toEnd, K hi, int hiExcluded) { |
1761 |
> |
super(m, fromStart, lo, loExcluded, toEnd, hi, hiExcluded); |
1762 |
|
} |
1669 |
– |
} |
1763 |
|
|
1764 |
< |
class ValueIterator extends PrivateEntryIterator<V> { |
1765 |
< |
ValueIterator(Entry<K,V> first) { |
1766 |
< |
super(first); |
1764 |
> |
private final Comparator<? super K> reverseComparator = |
1765 |
> |
Collections.reverseOrder(m.comparator); |
1766 |
> |
|
1767 |
> |
public Comparator<? super K> comparator() { |
1768 |
> |
return reverseComparator; |
1769 |
|
} |
1770 |
< |
public V next() { |
1771 |
< |
return nextEntry().value; |
1770 |
> |
|
1771 |
> |
public NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive, |
1772 |
> |
K toKey, boolean toInclusive) { |
1773 |
> |
if (!inRange(fromKey, fromInclusive)) |
1774 |
> |
throw new IllegalArgumentException("fromKey out of range"); |
1775 |
> |
if (!inRange(toKey, toInclusive)) |
1776 |
> |
throw new IllegalArgumentException("toKey out of range"); |
1777 |
> |
return new DescendingSubMap(m, |
1778 |
> |
false, toKey, excluded(toInclusive), |
1779 |
> |
false, fromKey, excluded(fromInclusive)); |
1780 |
|
} |
1678 |
– |
} |
1781 |
|
|
1782 |
< |
class SubMapEntryIterator extends PrivateEntryIterator<Map.Entry<K,V>> { |
1783 |
< |
private final K firstExcludedKey; |
1782 |
> |
public NavigableMap<K,V> headMap(K toKey, boolean inclusive) { |
1783 |
> |
if (!inRange(toKey, inclusive)) |
1784 |
> |
throw new IllegalArgumentException("toKey out of range"); |
1785 |
> |
return new DescendingSubMap(m, |
1786 |
> |
false, toKey, excluded(inclusive), |
1787 |
> |
toEnd, hi, hiExcluded); |
1788 |
> |
} |
1789 |
|
|
1790 |
< |
SubMapEntryIterator(Entry<K,V> first, Entry<K,V> firstExcluded) { |
1791 |
< |
super(first); |
1792 |
< |
firstExcludedKey = (firstExcluded == null |
1793 |
< |
? null |
1794 |
< |
: firstExcluded.key); |
1790 |
> |
public NavigableMap<K,V> tailMap(K fromKey, boolean inclusive){ |
1791 |
> |
if (!inRange(fromKey, inclusive)) |
1792 |
> |
throw new IllegalArgumentException("fromKey out of range"); |
1793 |
> |
return new DescendingSubMap(m, |
1794 |
> |
fromStart, lo, loExcluded, |
1795 |
> |
false, fromKey, excluded(inclusive)); |
1796 |
|
} |
1797 |
|
|
1798 |
< |
public boolean hasNext() { |
1799 |
< |
return next != null && next.key != firstExcludedKey; |
1798 |
> |
Iterator<K> keyIterator() { |
1799 |
> |
return new DescendingSubMapKeyIterator(hiEntry(), loFence()); |
1800 |
|
} |
1801 |
|
|
1802 |
< |
public Map.Entry<K,V> next() { |
1803 |
< |
if (next == null || next.key == firstExcludedKey) |
1696 |
< |
throw new NoSuchElementException(); |
1697 |
< |
return nextEntry(); |
1802 |
> |
Iterator<K> descendingKeyIterator() { |
1803 |
> |
return new SubMapKeyIterator(loEntry(), hiFence()); |
1804 |
|
} |
1699 |
– |
} |
1805 |
|
|
1806 |
+ |
class DescendingEntrySetView extends NavigableSubMap.EntrySetView { |
1807 |
+ |
public Iterator<Map.Entry<K,V>> iterator() { |
1808 |
+ |
return new DescendingSubMapEntryIterator(hiEntry(), loFence()); |
1809 |
+ |
} |
1810 |
+ |
} |
1811 |
|
|
1812 |
< |
/** |
1813 |
< |
* Base for Descending Iterators. |
1814 |
< |
*/ |
1705 |
< |
abstract class DescendingPrivateEntryIterator<T> extends PrivateEntryIterator<T> { |
1706 |
< |
DescendingPrivateEntryIterator(Entry<K,V> first) { |
1707 |
< |
super(first); |
1812 |
> |
public Set<Map.Entry<K,V>> entrySet() { |
1813 |
> |
EntrySetView es = entrySetView; |
1814 |
> |
return (es != null) ? es : new DescendingEntrySetView(); |
1815 |
|
} |
1816 |
|
|
1817 |
< |
Entry<K,V> nextEntry() { |
1818 |
< |
if (next == null) |
1712 |
< |
throw new NoSuchElementException(); |
1713 |
< |
if (modCount != expectedModCount) |
1714 |
< |
throw new ConcurrentModificationException(); |
1715 |
< |
lastReturned = next; |
1716 |
< |
next = predecessor(next); |
1717 |
< |
return lastReturned; |
1817 |
> |
public K firstKey() { |
1818 |
> |
return key(hiEntry()); |
1819 |
|
} |
1719 |
– |
} |
1820 |
|
|
1821 |
< |
class DescendingEntryIterator extends DescendingPrivateEntryIterator<Map.Entry<K,V>> { |
1822 |
< |
DescendingEntryIterator(Entry<K,V> first) { |
1723 |
< |
super(first); |
1821 |
> |
public K lastKey() { |
1822 |
> |
return key(loEntry()); |
1823 |
|
} |
1824 |
< |
public Map.Entry<K,V> next() { |
1825 |
< |
return nextEntry(); |
1824 |
> |
|
1825 |
> |
public Map.Entry<K,V> firstEntry() { |
1826 |
> |
return hiEntry(); |
1827 |
|
} |
1728 |
– |
} |
1828 |
|
|
1829 |
< |
class DescendingKeyIterator extends DescendingPrivateEntryIterator<K> { |
1830 |
< |
DescendingKeyIterator(Entry<K,V> first) { |
1732 |
< |
super(first); |
1829 |
> |
public Map.Entry<K,V> lastEntry() { |
1830 |
> |
return loEntry(); |
1831 |
|
} |
1832 |
< |
public K next() { |
1833 |
< |
return nextEntry().key; |
1832 |
> |
|
1833 |
> |
public Map.Entry<K,V> pollFirstEntry() { |
1834 |
> |
return pollHiEntry(); |
1835 |
|
} |
1737 |
– |
} |
1836 |
|
|
1837 |
+ |
public Map.Entry<K,V> pollLastEntry() { |
1838 |
+ |
return pollLoEntry(); |
1839 |
+ |
} |
1840 |
|
|
1841 |
< |
class DescendingSubMapEntryIterator extends DescendingPrivateEntryIterator<Map.Entry<K,V>> { |
1842 |
< |
private final K lastExcludedKey; |
1841 |
> |
public NavigableMap<K,V> descendingMap() { |
1842 |
> |
NavigableMap<K,V> mv = descendingMapView; |
1843 |
> |
return (mv != null) ? mv : |
1844 |
> |
(descendingMapView = |
1845 |
> |
new AscendingSubMap(m, |
1846 |
> |
fromStart, lo, loExcluded, |
1847 |
> |
toEnd, hi, hiExcluded)); |
1848 |
> |
} |
1849 |
|
|
1850 |
< |
DescendingSubMapEntryIterator(Entry<K,V> last, Entry<K,V> lastExcluded) { |
1851 |
< |
super(last); |
1745 |
< |
lastExcludedKey = (lastExcluded == null |
1746 |
< |
? null |
1747 |
< |
: lastExcluded.key); |
1850 |
> |
@Override TreeMap.Entry<K,V> subCeiling(K key) { |
1851 |
> |
return super.subFloor(key); |
1852 |
|
} |
1853 |
|
|
1854 |
< |
public boolean hasNext() { |
1855 |
< |
return next != null && next.key != lastExcludedKey; |
1854 |
> |
@Override TreeMap.Entry<K,V> subHigher(K key) { |
1855 |
> |
return super.subLower(key); |
1856 |
|
} |
1857 |
|
|
1858 |
< |
public Map.Entry<K,V> next() { |
1859 |
< |
if (next == null || next.key == lastExcludedKey) |
1756 |
< |
throw new NoSuchElementException(); |
1757 |
< |
return nextEntry(); |
1858 |
> |
@Override TreeMap.Entry<K,V> subFloor(K key) { |
1859 |
> |
return super.subCeiling(key); |
1860 |
|
} |
1861 |
|
|
1862 |
+ |
@Override TreeMap.Entry<K,V> subLower(K key) { |
1863 |
+ |
return super.subHigher(key); |
1864 |
+ |
} |
1865 |
|
} |
1866 |
|
|
1762 |
– |
|
1867 |
|
/** |
1868 |
|
* Compares two keys using the correct comparison method for this TreeMap. |
1869 |
|
*/ |
1870 |
< |
private int compare(K k1, K k2) { |
1871 |
< |
return (comparator==null ? ((Comparable</*-*/K>)k1).compareTo(k2) |
1872 |
< |
: comparator.compare((K)k1, (K)k2)); |
1870 |
> |
final int compare(Object k1, Object k2) { |
1871 |
> |
return comparator==null ? ((Comparable<? super K>)k1).compareTo((K)k2) |
1872 |
> |
: comparator.compare((K)k1, (K)k2); |
1873 |
|
} |
1874 |
|
|
1875 |
|
/** |
1876 |
< |
* Test two values for equality. Differs from o1.equals(o2) only in |
1876 |
> |
* Test two values for equality. Differs from o1.equals(o2) only in |
1877 |
|
* that it copes with <tt>null</tt> o1 properly. |
1878 |
|
*/ |
1879 |
< |
private static boolean valEquals(Object o1, Object o2) { |
1879 |
> |
final static boolean valEquals(Object o1, Object o2) { |
1880 |
|
return (o1==null ? o2==null : o1.equals(o2)); |
1881 |
|
} |
1882 |
|
|
1883 |
+ |
/** |
1884 |
+ |
* This class exists solely for the sake of serialization |
1885 |
+ |
* compatibility with previous releases of TreeMap that did not |
1886 |
+ |
* support NavigableMap. It translates an old-version SubMap into |
1887 |
+ |
* a new-version AscendingSubMap. This class is never otherwise |
1888 |
+ |
* used. |
1889 |
+ |
*/ |
1890 |
+ |
private class SubMap extends AbstractMap<K,V> |
1891 |
+ |
implements SortedMap<K,V>, java.io.Serializable { |
1892 |
+ |
private static final long serialVersionUID = -6520786458950516097L; |
1893 |
+ |
private boolean fromStart = false, toEnd = false; |
1894 |
+ |
private K fromKey, toKey; |
1895 |
+ |
private Object readResolve() { |
1896 |
+ |
return new AscendingSubMap(TreeMap.this, |
1897 |
+ |
fromStart, fromKey, 0, |
1898 |
+ |
toEnd, toKey, 1); |
1899 |
+ |
} |
1900 |
+ |
public Set<Map.Entry<K,V>> entrySet() { throw new InternalError(); } |
1901 |
+ |
public K lastKey() { throw new InternalError(); } |
1902 |
+ |
public K firstKey() { throw new InternalError(); } |
1903 |
+ |
public SortedMap<K,V> subMap(K fromKey, K toKey) { throw new InternalError(); } |
1904 |
+ |
public SortedMap<K,V> headMap(K toKey) { throw new InternalError(); } |
1905 |
+ |
public SortedMap<K,V> tailMap(K fromKey) { throw new InternalError(); } |
1906 |
+ |
public Comparator<? super K> comparator() { throw new InternalError(); } |
1907 |
+ |
} |
1908 |
+ |
|
1909 |
+ |
|
1910 |
|
private static final boolean RED = false; |
1911 |
|
private static final boolean BLACK = true; |
1912 |
|
|
1915 |
|
* user (see Map.Entry). |
1916 |
|
*/ |
1917 |
|
|
1918 |
< |
static class Entry<K,V> implements Map.Entry<K,V> { |
1918 |
> |
static final class Entry<K,V> implements Map.Entry<K,V> { |
1919 |
|
K key; |
1920 |
|
V value; |
1921 |
|
Entry<K,V> left = null; |
1936 |
|
/** |
1937 |
|
* Returns the key. |
1938 |
|
* |
1939 |
< |
* @return the key. |
1939 |
> |
* @return the key |
1940 |
|
*/ |
1941 |
|
public K getKey() { |
1942 |
|
return key; |
1945 |
|
/** |
1946 |
|
* Returns the value associated with the key. |
1947 |
|
* |
1948 |
< |
* @return the value associated with the key. |
1948 |
> |
* @return the value associated with the key |
1949 |
|
*/ |
1950 |
|
public V getValue() { |
1951 |
|
return value; |
1956 |
|
* value. |
1957 |
|
* |
1958 |
|
* @return the value associated with the key before this method was |
1959 |
< |
* called. |
1959 |
> |
* called |
1960 |
|
*/ |
1961 |
|
public V setValue(V value) { |
1962 |
|
V oldValue = this.value; |
1987 |
|
* Returns the first Entry in the TreeMap (according to the TreeMap's |
1988 |
|
* key-sort function). Returns null if the TreeMap is empty. |
1989 |
|
*/ |
1990 |
< |
private Entry<K,V> getFirstEntry() { |
1990 |
> |
final Entry<K,V> getFirstEntry() { |
1991 |
|
Entry<K,V> p = root; |
1992 |
|
if (p != null) |
1993 |
|
while (p.left != null) |
1999 |
|
* Returns the last Entry in the TreeMap (according to the TreeMap's |
2000 |
|
* key-sort function). Returns null if the TreeMap is empty. |
2001 |
|
*/ |
2002 |
< |
private Entry<K,V> getLastEntry() { |
2002 |
> |
final Entry<K,V> getLastEntry() { |
2003 |
|
Entry<K,V> p = root; |
2004 |
|
if (p != null) |
2005 |
|
while (p.right != null) |
2010 |
|
/** |
2011 |
|
* Returns the successor of the specified Entry, or null if no such. |
2012 |
|
*/ |
2013 |
< |
private Entry<K,V> successor(Entry<K,V> t) { |
2013 |
> |
static <K,V> TreeMap.Entry<K,V> successor(Entry<K,V> t) { |
2014 |
|
if (t == null) |
2015 |
|
return null; |
2016 |
|
else if (t.right != null) { |
2032 |
|
/** |
2033 |
|
* Returns the predecessor of the specified Entry, or null if no such. |
2034 |
|
*/ |
2035 |
< |
private Entry<K,V> predecessor(Entry<K,V> t) { |
2035 |
> |
static <K,V> Entry<K,V> predecessor(Entry<K,V> t) { |
2036 |
|
if (t == null) |
2037 |
|
return null; |
2038 |
|
else if (t.left != null) { |
2149 |
|
x = parentOf(x); |
2150 |
|
rotateRight(x); |
2151 |
|
} |
2152 |
< |
setColor(parentOf(x), BLACK); |
2152 |
> |
setColor(parentOf(x), BLACK); |
2153 |
|
setColor(parentOf(parentOf(x)), RED); |
2154 |
|
if (parentOf(parentOf(x)) != null) |
2155 |
|
rotateLeft(parentOf(parentOf(x))); |
2225 |
|
|
2226 |
|
if (colorOf(leftOf(sib)) == BLACK && |
2227 |
|
colorOf(rightOf(sib)) == BLACK) { |
2228 |
< |
setColor(sib, RED); |
2228 |
> |
setColor(sib, RED); |
2229 |
|
x = parentOf(x); |
2230 |
|
} else { |
2231 |
|
if (colorOf(rightOf(sib)) == BLACK) { |
2252 |
|
|
2253 |
|
if (colorOf(rightOf(sib)) == BLACK && |
2254 |
|
colorOf(leftOf(sib)) == BLACK) { |
2255 |
< |
setColor(sib, RED); |
2255 |
> |
setColor(sib, RED); |
2256 |
|
x = parentOf(x); |
2257 |
|
} else { |
2258 |
|
if (colorOf(leftOf(sib)) == BLACK) { |
2303 |
|
} |
2304 |
|
} |
2305 |
|
|
2175 |
– |
|
2176 |
– |
|
2306 |
|
/** |
2307 |
|
* Reconstitute the <tt>TreeMap</tt> instance from a stream (i.e., |
2308 |
|
* deserialize it). |
2325 |
|
} |
2326 |
|
|
2327 |
|
/** Intended to be called only from TreeSet.addAll **/ |
2328 |
< |
void addAllForTreeSet(SortedSet<Map.Entry<K,V>> set, V defaultVal) { |
2328 |
> |
void addAllForTreeSet(SortedSet<? extends K> set, V defaultVal) { |
2329 |
|
try { |
2330 |
|
buildFromSorted(set.size(), set.iterator(), null, defaultVal); |
2331 |
|
} catch (java.io.IOException cannotHappen) { |
2350 |
|
* to calling this method. |
2351 |
|
* |
2352 |
|
* @param size the number of keys (or key-value pairs) to be read from |
2353 |
< |
* the iterator or stream. |
2353 |
> |
* the iterator or stream |
2354 |
|
* @param it If non-null, new entries are created from entries |
2355 |
|
* or keys read from this iterator. |
2356 |
|
* @param str If non-null, new entries are created from keys and |
2364 |
|
* @throws ClassNotFoundException propagated from readObject. |
2365 |
|
* This cannot occur if str is null. |
2366 |
|
*/ |
2367 |
< |
private |
2368 |
< |
void buildFromSorted(int size, Iterator it, |
2369 |
< |
java.io.ObjectInputStream str, |
2241 |
< |
V defaultVal) |
2367 |
> |
private void buildFromSorted(int size, Iterator it, |
2368 |
> |
java.io.ObjectInputStream str, |
2369 |
> |
V defaultVal) |
2370 |
|
throws java.io.IOException, ClassNotFoundException { |
2371 |
|
this.size = size; |
2372 |
< |
root = |
2373 |
< |
buildFromSorted(0, 0, size-1, computeRedLevel(size), |
2246 |
< |
it, str, defaultVal); |
2372 |
> |
root = buildFromSorted(0, 0, size-1, computeRedLevel(size), |
2373 |
> |
it, str, defaultVal); |
2374 |
|
} |
2375 |
|
|
2376 |
|
/** |
2377 |
|
* Recursive "helper method" that does the real work of the |
2378 |
< |
* of the previous method. Identically named parameters have |
2378 |
> |
* previous method. Identically named parameters have |
2379 |
|
* identical definitions. Additional parameters are documented below. |
2380 |
|
* It is assumed that the comparator and size fields of the TreeMap are |
2381 |
|
* already set prior to calling this method. (It ignores both fields.) |
2383 |
|
* @param level the current level of tree. Initial call should be 0. |
2384 |
|
* @param lo the first element index of this subtree. Initial should be 0. |
2385 |
|
* @param hi the last element index of this subtree. Initial should be |
2386 |
< |
* size-1. |
2386 |
> |
* size-1. |
2387 |
|
* @param redLevel the level at which nodes should be red. |
2388 |
|
* Must be equal to computeRedLevel for tree of this size. |
2389 |
|
*/ |
2467 |
|
level++; |
2468 |
|
return level; |
2469 |
|
} |
2343 |
– |
|
2470 |
|
} |