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/* |
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* %W% %E% |
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* Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* Copyright 2005 Sun Microsystems, Inc. All rights reserved. |
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* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Sun designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Sun in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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*/ |
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|
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package java.util; |
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import java.util.*; // for javadoc |
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|
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/** |
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* A Red-Black tree based {@link NavigableMap} implementation. |
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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. |
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* |
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* <p><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> |
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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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* <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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* associated map using <tt>put</tt>.) |
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* |
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* <p>This class is a member of the |
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* <a href="{@docRoot}/../guide/collections/index.html"> |
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* <a href="{@docRoot}/../technotes/guides/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 HashMap |
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* @see Hashtable |
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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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* |
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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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|
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private transient Entry<K,V> root = null; |
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|
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*/ |
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private transient int modCount = 0; |
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|
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private void incrementSize() { modCount++; size++; } |
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private void decrementSize() { modCount++; size--; } |
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|
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/** |
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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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* <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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/** |
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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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* 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 requires time linear in the map size. |
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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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* <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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} |
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|
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private boolean valueSearchNull(Entry n) { |
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if (n.value == null) |
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return true; |
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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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} |
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|
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private boolean valueSearchNonNull(Entry n, Object value) { |
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// Check this node for the value |
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if (value.equals(n.value)) |
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return true; |
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|
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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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for (Entry<K,V> e = getFirstEntry(); e != null; e = successor(e)) |
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if (valEquals(value, e.value)) |
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return true; |
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return false; |
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} |
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|
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/** |
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* Returns 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. 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 {@link #containsKey} |
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* operation may be used to distinguish these two cases. |
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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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* <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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* @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 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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if (size==0 && mapSize!=0 && map instanceof SortedMap) { |
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Comparator c = ((SortedMap)map).comparator(); |
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if (c == comparator || (c != null && c.equals(comparator))) { |
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++modCount; |
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try { |
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buildFromSorted(mapSize, map.entrySet().iterator(), |
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null, null); |
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} catch (java.io.IOException cannotHappen) { |
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} catch (ClassNotFoundException cannotHappen) { |
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} |
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return; |
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++modCount; |
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try { |
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buildFromSorted(mapSize, map.entrySet().iterator(), |
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null, null); |
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} catch (java.io.IOException cannotHappen) { |
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} catch (ClassNotFoundException cannotHappen) { |
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} |
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return; |
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} |
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} |
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super.putAll(map); |
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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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< |
private Entry<K,V> getEntry(Object key) { |
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final Entry<K,V> getEntry(Object key) { |
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// Offload comparator-based version for sake of performance |
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if (comparator != null) |
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return getEntryUsingComparator(key); |
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Comparable<? super K> k = (Comparable<? super K>) key; |
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if (key == null) |
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throw new NullPointerException(); |
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> |
Comparable<? super K> k = (Comparable<? super K>) key; |
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Entry<K,V> p = root; |
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while (p != null) { |
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int cmp = k.compareTo(p.key); |
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* that are less dependent on comparator performance, but is |
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* worthwhile here.) |
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*/ |
362 |
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private Entry<K,V> getEntryUsingComparator(Object key) { |
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K k = (K) key; |
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final Entry<K,V> getEntryUsingComparator(Object key) { |
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> |
K k = (K) key; |
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Comparator<? super K> cpr = comparator; |
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Entry<K,V> p = root; |
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while (p != null) { |
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int cmp = cpr.compare(k, p.key); |
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< |
if (cmp < 0) |
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p = p.left; |
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else if (cmp > 0) |
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p = p.right; |
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else |
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return p; |
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if (cpr != null) { |
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> |
Entry<K,V> p = root; |
367 |
> |
while (p != null) { |
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> |
int cmp = cpr.compare(k, p.key); |
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> |
if (cmp < 0) |
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> |
p = p.left; |
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> |
else if (cmp > 0) |
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> |
p = p.right; |
373 |
> |
else |
374 |
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return p; |
375 |
> |
} |
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} |
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return null; |
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} |
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* key; if no such entry exists (i.e., the greatest key in the Tree is less |
384 |
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* than the specified key), returns <tt>null</tt>. |
385 |
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*/ |
386 |
< |
private Entry<K,V> getCeilingEntry(K key) { |
386 |
> |
final Entry<K,V> getCeilingEntry(K key) { |
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Entry<K,V> p = root; |
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< |
if (p==null) |
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< |
return null; |
384 |
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|
385 |
< |
while (true) { |
388 |
> |
while (p != null) { |
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int cmp = compare(key, p.key); |
390 |
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if (cmp < 0) { |
391 |
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if (p.left != null) |
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} else |
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return p; |
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} |
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+ |
return null; |
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} |
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|
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/** |
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* exists, returns the entry for the greatest key less than the specified |
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* key; if no such entry exists, returns <tt>null</tt>. |
417 |
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*/ |
418 |
< |
private Entry<K,V> getFloorEntry(K key) { |
418 |
> |
final Entry<K,V> getFloorEntry(K key) { |
419 |
|
Entry<K,V> p = root; |
420 |
< |
if (p==null) |
417 |
< |
return null; |
418 |
< |
|
419 |
< |
while (true) { |
420 |
> |
while (p != null) { |
421 |
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int cmp = compare(key, p.key); |
422 |
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if (cmp > 0) { |
423 |
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if (p.right != null) |
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return p; |
441 |
|
|
442 |
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} |
443 |
+ |
return null; |
444 |
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} |
445 |
|
|
446 |
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/** |
449 |
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* key greater than the specified key; if no such entry exists |
450 |
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* returns <tt>null</tt>. |
451 |
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*/ |
452 |
< |
private Entry<K,V> getHigherEntry(K key) { |
452 |
> |
final Entry<K,V> getHigherEntry(K key) { |
453 |
|
Entry<K,V> p = root; |
454 |
< |
if (p==null) |
453 |
< |
return null; |
454 |
< |
|
455 |
< |
while (true) { |
454 |
> |
while (p != null) { |
455 |
|
int cmp = compare(key, p.key); |
456 |
|
if (cmp < 0) { |
457 |
|
if (p.left != null) |
472 |
|
} |
473 |
|
} |
474 |
|
} |
475 |
+ |
return null; |
476 |
|
} |
477 |
|
|
478 |
|
/** |
480 |
|
* no such entry exists (i.e., the least key in the Tree is greater than |
481 |
|
* the specified key), returns <tt>null</tt>. |
482 |
|
*/ |
483 |
< |
private Entry<K,V> getLowerEntry(K key) { |
483 |
> |
final Entry<K,V> getLowerEntry(K key) { |
484 |
|
Entry<K,V> p = root; |
485 |
< |
if (p==null) |
486 |
< |
return null; |
487 |
< |
|
488 |
< |
while (true) { |
485 |
> |
while (p != null) { |
486 |
|
int cmp = compare(key, p.key); |
487 |
|
if (cmp > 0) { |
488 |
|
if (p.right != null) |
503 |
|
} |
504 |
|
} |
505 |
|
} |
506 |
< |
} |
510 |
< |
|
511 |
< |
/** |
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) { |
516 |
< |
if (e==null) |
517 |
< |
throw new NoSuchElementException(); |
518 |
< |
return e.key; |
506 |
> |
return null; |
507 |
|
} |
508 |
|
|
509 |
|
/** |
510 |
|
* Associates the specified value with the specified key in this map. |
511 |
< |
* If the map previously contained a mapping for this key, the old |
511 |
> |
* If the map previously contained a mapping for the key, the old |
512 |
|
* value is replaced. |
513 |
|
* |
514 |
|
* @param key key with which the specified value is to be associated |
526 |
|
*/ |
527 |
|
public V put(K key, V value) { |
528 |
|
Entry<K,V> t = root; |
541 |
– |
|
529 |
|
if (t == null) { |
530 |
< |
if (key == null) { |
531 |
< |
if (comparator == null) |
532 |
< |
throw new NullPointerException(); |
533 |
< |
comparator.compare(key, key); |
534 |
< |
} |
548 |
< |
incrementSize(); |
530 |
> |
// TBD: |
531 |
> |
// 5045147: (coll) Adding null to an empty TreeSet should |
532 |
> |
// throw NullPointerException |
533 |
> |
// |
534 |
> |
// compare(key, key); // type check |
535 |
|
root = new Entry<K,V>(key, value, null); |
536 |
+ |
size = 1; |
537 |
+ |
modCount++; |
538 |
|
return null; |
539 |
|
} |
540 |
< |
|
541 |
< |
while (true) { |
542 |
< |
int cmp = compare(key, t.key); |
543 |
< |
if (cmp == 0) { |
544 |
< |
return t.setValue(value); |
545 |
< |
} else if (cmp < 0) { |
546 |
< |
if (t.left != null) { |
540 |
> |
int cmp; |
541 |
> |
Entry<K,V> parent; |
542 |
> |
// split comparator and comparable paths |
543 |
> |
Comparator<? super K> cpr = comparator; |
544 |
> |
if (cpr != null) { |
545 |
> |
do { |
546 |
> |
parent = t; |
547 |
> |
cmp = cpr.compare(key, t.key); |
548 |
> |
if (cmp < 0) |
549 |
|
t = t.left; |
550 |
< |
} else { |
561 |
< |
incrementSize(); |
562 |
< |
t.left = new Entry<K,V>(key, value, t); |
563 |
< |
fixAfterInsertion(t.left); |
564 |
< |
return null; |
565 |
< |
} |
566 |
< |
} else { // cmp > 0 |
567 |
< |
if (t.right != null) { |
550 |
> |
else if (cmp > 0) |
551 |
|
t = t.right; |
552 |
< |
} else { |
553 |
< |
incrementSize(); |
554 |
< |
t.right = new Entry<K,V>(key, value, t); |
555 |
< |
fixAfterInsertion(t.right); |
556 |
< |
return null; |
557 |
< |
} |
558 |
< |
} |
552 |
> |
else |
553 |
> |
return t.setValue(value); |
554 |
> |
} while (t != null); |
555 |
> |
} |
556 |
> |
else { |
557 |
> |
if (key == null) |
558 |
> |
throw new NullPointerException(); |
559 |
> |
Comparable<? super K> k = (Comparable<? super K>) key; |
560 |
> |
do { |
561 |
> |
parent = t; |
562 |
> |
cmp = k.compareTo(t.key); |
563 |
> |
if (cmp < 0) |
564 |
> |
t = t.left; |
565 |
> |
else if (cmp > 0) |
566 |
> |
t = t.right; |
567 |
> |
else |
568 |
> |
return t.setValue(value); |
569 |
> |
} while (t != null); |
570 |
|
} |
571 |
+ |
Entry<K,V> e = new Entry<K,V>(key, value, parent); |
572 |
+ |
if (cmp < 0) |
573 |
+ |
parent.left = e; |
574 |
+ |
else |
575 |
+ |
parent.right = e; |
576 |
+ |
fixAfterInsertion(e); |
577 |
+ |
size++; |
578 |
+ |
modCount++; |
579 |
+ |
return null; |
580 |
|
} |
581 |
|
|
582 |
|
/** |
632 |
|
clone.size = 0; |
633 |
|
clone.modCount = 0; |
634 |
|
clone.entrySet = null; |
635 |
< |
clone.descendingEntrySet = null; |
636 |
< |
clone.descendingKeySet = null; |
635 |
> |
clone.navigableKeySet = null; |
636 |
> |
clone.descendingMap = null; |
637 |
|
|
638 |
|
// Initialize clone with our mappings |
639 |
|
try { |
647 |
|
|
648 |
|
// NavigableMap API methods |
649 |
|
|
650 |
+ |
/** |
651 |
+ |
* @since 1.6 |
652 |
+ |
*/ |
653 |
|
public Map.Entry<K,V> firstEntry() { |
654 |
< |
Entry<K,V> e = getFirstEntry(); |
649 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
654 |
> |
return exportEntry(getFirstEntry()); |
655 |
|
} |
656 |
|
|
657 |
+ |
/** |
658 |
+ |
* @since 1.6 |
659 |
+ |
*/ |
660 |
|
public Map.Entry<K,V> lastEntry() { |
661 |
< |
Entry<K,V> e = getLastEntry(); |
654 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
661 |
> |
return exportEntry(getLastEntry()); |
662 |
|
} |
663 |
|
|
664 |
+ |
/** |
665 |
+ |
* @since 1.6 |
666 |
+ |
*/ |
667 |
|
public Map.Entry<K,V> pollFirstEntry() { |
668 |
|
Entry<K,V> p = getFirstEntry(); |
669 |
< |
if (p == null) |
670 |
< |
return null; |
671 |
< |
Map.Entry<K,V> result = new AbstractMap.SimpleImmutableEntry<K,V>(p); |
662 |
< |
deleteEntry(p); |
669 |
> |
Map.Entry<K,V> result = exportEntry(p); |
670 |
> |
if (p != null) |
671 |
> |
deleteEntry(p); |
672 |
|
return result; |
673 |
|
} |
674 |
|
|
675 |
+ |
/** |
676 |
+ |
* @since 1.6 |
677 |
+ |
*/ |
678 |
|
public Map.Entry<K,V> pollLastEntry() { |
679 |
|
Entry<K,V> p = getLastEntry(); |
680 |
< |
if (p == null) |
681 |
< |
return null; |
682 |
< |
Map.Entry<K,V> result = new AbstractMap.SimpleImmutableEntry<K,V>(p); |
671 |
< |
deleteEntry(p); |
680 |
> |
Map.Entry<K,V> result = exportEntry(p); |
681 |
> |
if (p != null) |
682 |
> |
deleteEntry(p); |
683 |
|
return result; |
684 |
|
} |
685 |
|
|
688 |
|
* @throws NullPointerException if the specified key is null |
689 |
|
* and this map uses natural ordering, or its comparator |
690 |
|
* does not permit null keys |
691 |
+ |
* @since 1.6 |
692 |
|
*/ |
693 |
|
public Map.Entry<K,V> lowerEntry(K key) { |
694 |
< |
Entry<K,V> e = getLowerEntry(key); |
683 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
694 |
> |
return exportEntry(getLowerEntry(key)); |
695 |
|
} |
696 |
|
|
697 |
|
/** |
699 |
|
* @throws NullPointerException if the specified key is null |
700 |
|
* and this map uses natural ordering, or its comparator |
701 |
|
* does not permit null keys |
702 |
+ |
* @since 1.6 |
703 |
|
*/ |
704 |
|
public K lowerKey(K key) { |
705 |
< |
Entry<K,V> e = getLowerEntry(key); |
694 |
< |
return (e == null)? null : e.key; |
705 |
> |
return keyOrNull(getLowerEntry(key)); |
706 |
|
} |
707 |
|
|
708 |
|
/** |
710 |
|
* @throws NullPointerException if the specified key is null |
711 |
|
* and this map uses natural ordering, or its comparator |
712 |
|
* does not permit null keys |
713 |
+ |
* @since 1.6 |
714 |
|
*/ |
715 |
|
public Map.Entry<K,V> floorEntry(K key) { |
716 |
< |
Entry<K,V> e = getFloorEntry(key); |
705 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
716 |
> |
return exportEntry(getFloorEntry(key)); |
717 |
|
} |
718 |
|
|
719 |
|
/** |
721 |
|
* @throws NullPointerException if the specified key is null |
722 |
|
* and this map uses natural ordering, or its comparator |
723 |
|
* does not permit null keys |
724 |
+ |
* @since 1.6 |
725 |
|
*/ |
726 |
|
public K floorKey(K key) { |
727 |
< |
Entry<K,V> e = getFloorEntry(key); |
716 |
< |
return (e == null)? null : e.key; |
727 |
> |
return keyOrNull(getFloorEntry(key)); |
728 |
|
} |
729 |
|
|
730 |
|
/** |
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 Map.Entry<K,V> ceilingEntry(K key) { |
738 |
< |
Entry<K,V> e = getCeilingEntry(key); |
727 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
738 |
> |
return exportEntry(getCeilingEntry(key)); |
739 |
|
} |
740 |
|
|
741 |
|
/** |
743 |
|
* @throws NullPointerException if the specified key is null |
744 |
|
* and this map uses natural ordering, or its comparator |
745 |
|
* does not permit null keys |
746 |
+ |
* @since 1.6 |
747 |
|
*/ |
748 |
|
public K ceilingKey(K key) { |
749 |
< |
Entry<K,V> e = getCeilingEntry(key); |
738 |
< |
return (e == null)? null : e.key; |
749 |
> |
return keyOrNull(getCeilingEntry(key)); |
750 |
|
} |
751 |
|
|
752 |
|
/** |
754 |
|
* @throws NullPointerException if the specified key is null |
755 |
|
* and this map uses natural ordering, or its comparator |
756 |
|
* does not permit null keys |
757 |
+ |
* @since 1.6 |
758 |
|
*/ |
759 |
|
public Map.Entry<K,V> higherEntry(K key) { |
760 |
< |
Entry<K,V> e = getHigherEntry(key); |
749 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
760 |
> |
return exportEntry(getHigherEntry(key)); |
761 |
|
} |
762 |
|
|
763 |
|
/** |
765 |
|
* @throws NullPointerException if the specified key is null |
766 |
|
* and this map uses natural ordering, or its comparator |
767 |
|
* does not permit null keys |
768 |
+ |
* @since 1.6 |
769 |
|
*/ |
770 |
|
public K higherKey(K key) { |
771 |
< |
Entry<K,V> e = getHigherEntry(key); |
760 |
< |
return (e == null)? null : e.key; |
771 |
> |
return keyOrNull(getHigherEntry(key)); |
772 |
|
} |
773 |
|
|
774 |
|
// Views |
778 |
|
* the first time this view is requested. Views are stateless, so |
779 |
|
* there's no reason to create more than one. |
780 |
|
*/ |
781 |
< |
private transient Set<Map.Entry<K,V>> entrySet = null; |
782 |
< |
private transient Set<Map.Entry<K,V>> descendingEntrySet = null; |
783 |
< |
private transient Set<K> descendingKeySet = null; |
781 |
> |
private transient EntrySet entrySet = null; |
782 |
> |
private transient KeySet<K> navigableKeySet = null; |
783 |
> |
private transient NavigableMap<K,V> descendingMap = null; |
784 |
|
|
785 |
|
/** |
786 |
|
* Returns a {@link Set} view of the keys contained in this map. |
797 |
|
* operations. |
798 |
|
*/ |
799 |
|
public Set<K> keySet() { |
800 |
< |
Set<K> ks = keySet; |
790 |
< |
return (ks != null) ? ks : (keySet = new KeySet()); |
800 |
> |
return navigableKeySet(); |
801 |
|
} |
802 |
|
|
803 |
< |
class KeySet extends AbstractSet<K> { |
804 |
< |
public Iterator<K> iterator() { |
805 |
< |
return new KeyIterator(getFirstEntry()); |
806 |
< |
} |
807 |
< |
|
808 |
< |
public int size() { |
809 |
< |
return TreeMap.this.size(); |
800 |
< |
} |
801 |
< |
|
802 |
< |
public boolean contains(Object o) { |
803 |
< |
return containsKey(o); |
804 |
< |
} |
805 |
< |
|
806 |
< |
public boolean remove(Object o) { |
807 |
< |
int oldSize = size; |
808 |
< |
TreeMap.this.remove(o); |
809 |
< |
return size != oldSize; |
810 |
< |
} |
803 |
> |
/** |
804 |
> |
* @since 1.6 |
805 |
> |
*/ |
806 |
> |
public NavigableSet<K> navigableKeySet() { |
807 |
> |
KeySet<K> nks = navigableKeySet; |
808 |
> |
return (nks != null) ? nks : (navigableKeySet = new KeySet(this)); |
809 |
> |
} |
810 |
|
|
811 |
< |
public void clear() { |
812 |
< |
TreeMap.this.clear(); |
813 |
< |
} |
811 |
> |
/** |
812 |
> |
* @since 1.6 |
813 |
> |
*/ |
814 |
> |
public NavigableSet<K> descendingKeySet() { |
815 |
> |
return descendingMap().navigableKeySet(); |
816 |
|
} |
817 |
|
|
818 |
|
/** |
835 |
|
return (vs != null) ? vs : (values = new Values()); |
836 |
|
} |
837 |
|
|
838 |
+ |
/** |
839 |
+ |
* Returns a {@link Set} view of the mappings contained in this map. |
840 |
+ |
* The set's iterator returns the entries in ascending key order. |
841 |
+ |
* The set is backed by the map, so changes to the map are |
842 |
+ |
* reflected in the set, and vice-versa. If the map is modified |
843 |
+ |
* while an iteration over the set is in progress (except through |
844 |
+ |
* the iterator's own <tt>remove</tt> operation, or through the |
845 |
+ |
* <tt>setValue</tt> operation on a map entry returned by the |
846 |
+ |
* iterator) the results of the iteration are undefined. The set |
847 |
+ |
* supports element removal, which removes the corresponding |
848 |
+ |
* mapping from the map, via the <tt>Iterator.remove</tt>, |
849 |
+ |
* <tt>Set.remove</tt>, <tt>removeAll</tt>, <tt>retainAll</tt> and |
850 |
+ |
* <tt>clear</tt> operations. It does not support the |
851 |
+ |
* <tt>add</tt> or <tt>addAll</tt> operations. |
852 |
+ |
*/ |
853 |
+ |
public Set<Map.Entry<K,V>> entrySet() { |
854 |
+ |
EntrySet es = entrySet; |
855 |
+ |
return (es != null) ? es : (entrySet = new EntrySet()); |
856 |
+ |
} |
857 |
+ |
|
858 |
+ |
/** |
859 |
+ |
* @since 1.6 |
860 |
+ |
*/ |
861 |
+ |
public NavigableMap<K, V> descendingMap() { |
862 |
+ |
NavigableMap<K, V> km = descendingMap; |
863 |
+ |
return (km != null) ? km : |
864 |
+ |
(descendingMap = new DescendingSubMap(this, |
865 |
+ |
true, null, true, |
866 |
+ |
true, null, true)); |
867 |
+ |
} |
868 |
+ |
|
869 |
+ |
/** |
870 |
+ |
* @throws ClassCastException {@inheritDoc} |
871 |
+ |
* @throws NullPointerException if <tt>fromKey</tt> or <tt>toKey</tt> is |
872 |
+ |
* null and this map uses natural ordering, or its comparator |
873 |
+ |
* does not permit null keys |
874 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
875 |
+ |
* @since 1.6 |
876 |
+ |
*/ |
877 |
+ |
public NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive, |
878 |
+ |
K toKey, boolean toInclusive) { |
879 |
+ |
return new AscendingSubMap(this, |
880 |
+ |
false, fromKey, fromInclusive, |
881 |
+ |
false, toKey, toInclusive); |
882 |
+ |
} |
883 |
+ |
|
884 |
+ |
/** |
885 |
+ |
* @throws ClassCastException {@inheritDoc} |
886 |
+ |
* @throws NullPointerException if <tt>toKey</tt> is null |
887 |
+ |
* and this map uses natural ordering, or its comparator |
888 |
+ |
* does not permit null keys |
889 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
890 |
+ |
* @since 1.6 |
891 |
+ |
*/ |
892 |
+ |
public NavigableMap<K,V> headMap(K toKey, boolean inclusive) { |
893 |
+ |
return new AscendingSubMap(this, |
894 |
+ |
true, null, true, |
895 |
+ |
false, toKey, inclusive); |
896 |
+ |
} |
897 |
+ |
|
898 |
+ |
/** |
899 |
+ |
* @throws ClassCastException {@inheritDoc} |
900 |
+ |
* @throws NullPointerException if <tt>fromKey</tt> is null |
901 |
+ |
* and this map uses natural ordering, or its comparator |
902 |
+ |
* does not permit null keys |
903 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
904 |
+ |
* @since 1.6 |
905 |
+ |
*/ |
906 |
+ |
public NavigableMap<K,V> tailMap(K fromKey, boolean inclusive) { |
907 |
+ |
return new AscendingSubMap(this, |
908 |
+ |
false, fromKey, inclusive, |
909 |
+ |
true, null, true); |
910 |
+ |
} |
911 |
+ |
|
912 |
+ |
/** |
913 |
+ |
* @throws ClassCastException {@inheritDoc} |
914 |
+ |
* @throws NullPointerException if <tt>fromKey</tt> or <tt>toKey</tt> is |
915 |
+ |
* null and this map uses natural ordering, or its comparator |
916 |
+ |
* does not permit null keys |
917 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
918 |
+ |
*/ |
919 |
+ |
public SortedMap<K,V> subMap(K fromKey, K toKey) { |
920 |
+ |
return subMap(fromKey, true, toKey, false); |
921 |
+ |
} |
922 |
+ |
|
923 |
+ |
/** |
924 |
+ |
* @throws ClassCastException {@inheritDoc} |
925 |
+ |
* @throws NullPointerException if <tt>toKey</tt> is null |
926 |
+ |
* and this map uses natural ordering, or its comparator |
927 |
+ |
* does not permit null keys |
928 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
929 |
+ |
*/ |
930 |
+ |
public SortedMap<K,V> headMap(K toKey) { |
931 |
+ |
return headMap(toKey, false); |
932 |
+ |
} |
933 |
+ |
|
934 |
+ |
/** |
935 |
+ |
* @throws ClassCastException {@inheritDoc} |
936 |
+ |
* @throws NullPointerException if <tt>fromKey</tt> is null |
937 |
+ |
* and this map uses natural ordering, or its comparator |
938 |
+ |
* does not permit null keys |
939 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
940 |
+ |
*/ |
941 |
+ |
public SortedMap<K,V> tailMap(K fromKey) { |
942 |
+ |
return tailMap(fromKey, true); |
943 |
+ |
} |
944 |
+ |
|
945 |
+ |
// View class support |
946 |
+ |
|
947 |
|
class Values extends AbstractCollection<V> { |
948 |
|
public Iterator<V> iterator() { |
949 |
|
return new ValueIterator(getFirstEntry()); |
954 |
|
} |
955 |
|
|
956 |
|
public boolean contains(Object o) { |
957 |
< |
for (Entry<K,V> e = getFirstEntry(); e != null; e = successor(e)) |
848 |
< |
if (valEquals(e.getValue(), o)) |
849 |
< |
return true; |
850 |
< |
return false; |
957 |
> |
return TreeMap.this.containsValue(o); |
958 |
|
} |
959 |
|
|
960 |
|
public boolean remove(Object o) { |
972 |
|
} |
973 |
|
} |
974 |
|
|
868 |
– |
/** |
869 |
– |
* Returns a {@link Set} view of the mappings contained in this map. |
870 |
– |
* The set's iterator returns the entries in ascending key order. |
871 |
– |
* The set is backed by the map, so changes to the map are |
872 |
– |
* reflected in the set, and vice-versa. If the map is modified |
873 |
– |
* while an iteration over the set is in progress (except through |
874 |
– |
* the iterator's own <tt>remove</tt> operation, or through the |
875 |
– |
* <tt>setValue</tt> operation on a map entry returned by the |
876 |
– |
* iterator) the results of the iteration are undefined. The set |
877 |
– |
* supports element removal, which removes the corresponding |
878 |
– |
* mapping from the map, via the <tt>Iterator.remove</tt>, |
879 |
– |
* <tt>Set.remove</tt>, <tt>removeAll</tt>, <tt>retainAll</tt> and |
880 |
– |
* <tt>clear</tt> operations. It does not support the |
881 |
– |
* <tt>add</tt> or <tt>addAll</tt> operations. |
882 |
– |
*/ |
883 |
– |
public Set<Map.Entry<K,V>> entrySet() { |
884 |
– |
Set<Map.Entry<K,V>> es = entrySet; |
885 |
– |
return (es != null) ? es : (entrySet = new EntrySet()); |
886 |
– |
} |
887 |
– |
|
975 |
|
class EntrySet extends AbstractSet<Map.Entry<K,V>> { |
976 |
|
public Iterator<Map.Entry<K,V>> iterator() { |
977 |
|
return new EntryIterator(getFirstEntry()); |
1008 |
|
} |
1009 |
|
} |
1010 |
|
|
1011 |
< |
public Set<Map.Entry<K,V>> descendingEntrySet() { |
1012 |
< |
Set<Map.Entry<K,V>> es = descendingEntrySet; |
1013 |
< |
return (es != null) ? es : (descendingEntrySet = new DescendingEntrySet()); |
1011 |
> |
/* |
1012 |
> |
* Unlike Values and EntrySet, the KeySet class is static, |
1013 |
> |
* delegating to a NavigableMap to allow use by SubMaps, which |
1014 |
> |
* outweighs the ugliness of needing type-tests for the following |
1015 |
> |
* Iterator methods that are defined appropriately in main versus |
1016 |
> |
* submap classes. |
1017 |
> |
*/ |
1018 |
> |
|
1019 |
> |
Iterator<K> keyIterator() { |
1020 |
> |
return new KeyIterator(getFirstEntry()); |
1021 |
|
} |
1022 |
|
|
1023 |
< |
class DescendingEntrySet extends EntrySet { |
1024 |
< |
public Iterator<Map.Entry<K,V>> iterator() { |
1025 |
< |
return new DescendingEntryIterator(getLastEntry()); |
1023 |
> |
Iterator<K> descendingKeyIterator() { |
1024 |
> |
return new DescendingKeyIterator(getLastEntry()); |
1025 |
> |
} |
1026 |
> |
|
1027 |
> |
static final class KeySet<E> extends AbstractSet<E> implements NavigableSet<E> { |
1028 |
> |
private final NavigableMap<E, Object> m; |
1029 |
> |
KeySet(NavigableMap<E,Object> map) { m = map; } |
1030 |
> |
|
1031 |
> |
public Iterator<E> iterator() { |
1032 |
> |
if (m instanceof TreeMap) |
1033 |
> |
return ((TreeMap<E,Object>)m).keyIterator(); |
1034 |
> |
else |
1035 |
> |
return (Iterator<E>)(((TreeMap.NavigableSubMap)m).keyIterator()); |
1036 |
> |
} |
1037 |
> |
|
1038 |
> |
public Iterator<E> descendingIterator() { |
1039 |
> |
if (m instanceof TreeMap) |
1040 |
> |
return ((TreeMap<E,Object>)m).descendingKeyIterator(); |
1041 |
> |
else |
1042 |
> |
return (Iterator<E>)(((TreeMap.NavigableSubMap)m).descendingKeyIterator()); |
1043 |
> |
} |
1044 |
> |
|
1045 |
> |
public int size() { return m.size(); } |
1046 |
> |
public boolean isEmpty() { return m.isEmpty(); } |
1047 |
> |
public boolean contains(Object o) { return m.containsKey(o); } |
1048 |
> |
public void clear() { m.clear(); } |
1049 |
> |
public E lower(E e) { return m.lowerKey(e); } |
1050 |
> |
public E floor(E e) { return m.floorKey(e); } |
1051 |
> |
public E ceiling(E e) { return m.ceilingKey(e); } |
1052 |
> |
public E higher(E e) { return m.higherKey(e); } |
1053 |
> |
public E first() { return m.firstKey(); } |
1054 |
> |
public E last() { return m.lastKey(); } |
1055 |
> |
public Comparator<? super E> comparator() { return m.comparator(); } |
1056 |
> |
public E pollFirst() { |
1057 |
> |
Map.Entry<E,Object> e = m.pollFirstEntry(); |
1058 |
> |
return e == null? null : e.getKey(); |
1059 |
> |
} |
1060 |
> |
public E pollLast() { |
1061 |
> |
Map.Entry<E,Object> e = m.pollLastEntry(); |
1062 |
> |
return e == null? null : e.getKey(); |
1063 |
> |
} |
1064 |
> |
public boolean remove(Object o) { |
1065 |
> |
int oldSize = size(); |
1066 |
> |
m.remove(o); |
1067 |
> |
return size() != oldSize; |
1068 |
> |
} |
1069 |
> |
public NavigableSet<E> subSet(E fromElement, boolean fromInclusive, |
1070 |
> |
E toElement, boolean toInclusive) { |
1071 |
> |
return new KeySet<E>(m.subMap(fromElement, fromInclusive, |
1072 |
> |
toElement, toInclusive)); |
1073 |
> |
} |
1074 |
> |
public NavigableSet<E> headSet(E toElement, boolean inclusive) { |
1075 |
> |
return new KeySet<E>(m.headMap(toElement, inclusive)); |
1076 |
> |
} |
1077 |
> |
public NavigableSet<E> tailSet(E fromElement, boolean inclusive) { |
1078 |
> |
return new KeySet<E>(m.tailMap(fromElement, inclusive)); |
1079 |
> |
} |
1080 |
> |
public SortedSet<E> subSet(E fromElement, E toElement) { |
1081 |
> |
return subSet(fromElement, true, toElement, false); |
1082 |
> |
} |
1083 |
> |
public SortedSet<E> headSet(E toElement) { |
1084 |
> |
return headSet(toElement, false); |
1085 |
> |
} |
1086 |
> |
public SortedSet<E> tailSet(E fromElement) { |
1087 |
> |
return tailSet(fromElement, true); |
1088 |
> |
} |
1089 |
> |
public NavigableSet<E> descendingSet() { |
1090 |
> |
return new KeySet(m.descendingMap()); |
1091 |
> |
} |
1092 |
> |
} |
1093 |
> |
|
1094 |
> |
/** |
1095 |
> |
* Base class for TreeMap Iterators |
1096 |
> |
*/ |
1097 |
> |
abstract class PrivateEntryIterator<T> implements Iterator<T> { |
1098 |
> |
Entry<K,V> next; |
1099 |
> |
Entry<K,V> lastReturned; |
1100 |
> |
int expectedModCount; |
1101 |
> |
|
1102 |
> |
PrivateEntryIterator(Entry<K,V> first) { |
1103 |
> |
expectedModCount = modCount; |
1104 |
> |
lastReturned = null; |
1105 |
> |
next = first; |
1106 |
> |
} |
1107 |
> |
|
1108 |
> |
public final boolean hasNext() { |
1109 |
> |
return next != null; |
1110 |
> |
} |
1111 |
> |
|
1112 |
> |
final Entry<K,V> nextEntry() { |
1113 |
> |
Entry<K,V> e = next; |
1114 |
> |
if (e == null) |
1115 |
> |
throw new NoSuchElementException(); |
1116 |
> |
if (modCount != expectedModCount) |
1117 |
> |
throw new ConcurrentModificationException(); |
1118 |
> |
next = successor(e); |
1119 |
> |
lastReturned = e; |
1120 |
> |
return e; |
1121 |
> |
} |
1122 |
> |
|
1123 |
> |
final Entry<K,V> prevEntry() { |
1124 |
> |
Entry<K,V> e = next; |
1125 |
> |
if (e == null) |
1126 |
> |
throw new NoSuchElementException(); |
1127 |
> |
if (modCount != expectedModCount) |
1128 |
> |
throw new ConcurrentModificationException(); |
1129 |
> |
next = predecessor(e); |
1130 |
> |
lastReturned = e; |
1131 |
> |
return e; |
1132 |
> |
} |
1133 |
> |
|
1134 |
> |
public void remove() { |
1135 |
> |
if (lastReturned == null) |
1136 |
> |
throw new IllegalStateException(); |
1137 |
> |
if (modCount != expectedModCount) |
1138 |
> |
throw new ConcurrentModificationException(); |
1139 |
> |
// deleted entries are replaced by their successors |
1140 |
> |
if (lastReturned.left != null && lastReturned.right != null) |
1141 |
> |
next = lastReturned; |
1142 |
> |
deleteEntry(lastReturned); |
1143 |
> |
expectedModCount = modCount; |
1144 |
> |
lastReturned = null; |
1145 |
|
} |
1146 |
|
} |
1147 |
|
|
1148 |
< |
public Set<K> descendingKeySet() { |
1149 |
< |
Set<K> ks = descendingKeySet; |
1150 |
< |
return (ks != null) ? ks : (descendingKeySet = new DescendingKeySet()); |
1148 |
> |
final class EntryIterator extends PrivateEntryIterator<Map.Entry<K,V>> { |
1149 |
> |
EntryIterator(Entry<K,V> first) { |
1150 |
> |
super(first); |
1151 |
> |
} |
1152 |
> |
public Map.Entry<K,V> next() { |
1153 |
> |
return nextEntry(); |
1154 |
> |
} |
1155 |
|
} |
1156 |
|
|
1157 |
< |
class DescendingKeySet extends KeySet { |
1158 |
< |
public Iterator<K> iterator() { |
1159 |
< |
return new DescendingKeyIterator(getLastEntry()); |
1157 |
> |
final class ValueIterator extends PrivateEntryIterator<V> { |
1158 |
> |
ValueIterator(Entry<K,V> first) { |
1159 |
> |
super(first); |
1160 |
> |
} |
1161 |
> |
public V next() { |
1162 |
> |
return nextEntry().value; |
1163 |
|
} |
1164 |
|
} |
1165 |
|
|
1166 |
+ |
final class KeyIterator extends PrivateEntryIterator<K> { |
1167 |
+ |
KeyIterator(Entry<K,V> first) { |
1168 |
+ |
super(first); |
1169 |
+ |
} |
1170 |
+ |
public K next() { |
1171 |
+ |
return nextEntry().key; |
1172 |
+ |
} |
1173 |
+ |
} |
1174 |
+ |
|
1175 |
+ |
final class DescendingKeyIterator extends PrivateEntryIterator<K> { |
1176 |
+ |
DescendingKeyIterator(Entry<K,V> first) { |
1177 |
+ |
super(first); |
1178 |
+ |
} |
1179 |
+ |
public K next() { |
1180 |
+ |
return prevEntry().key; |
1181 |
+ |
} |
1182 |
+ |
} |
1183 |
+ |
|
1184 |
+ |
// Little utilities |
1185 |
+ |
|
1186 |
|
/** |
1187 |
< |
* @throws ClassCastException {@inheritDoc} |
948 |
< |
* @throws NullPointerException if <tt>fromKey</tt> or <tt>toKey</tt> is |
949 |
< |
* null and this map uses natural ordering, or its comparator |
950 |
< |
* does not permit null keys |
951 |
< |
* @throws IllegalArgumentException {@inheritDoc} |
1187 |
> |
* Compares two keys using the correct comparison method for this TreeMap. |
1188 |
|
*/ |
1189 |
< |
public NavigableMap<K,V> navigableSubMap(K fromKey, K toKey) { |
1190 |
< |
return new SubMap(fromKey, toKey); |
1189 |
> |
final int compare(Object k1, Object k2) { |
1190 |
> |
return comparator==null ? ((Comparable<? super K>)k1).compareTo((K)k2) |
1191 |
> |
: comparator.compare((K)k1, (K)k2); |
1192 |
|
} |
1193 |
|
|
1194 |
|
/** |
1195 |
< |
* @throws ClassCastException {@inheritDoc} |
1196 |
< |
* @throws NullPointerException if <tt>toKey</tt> is null |
960 |
< |
* and this map uses natural ordering, or its comparator |
961 |
< |
* does not permit null keys |
962 |
< |
* @throws IllegalArgumentException {@inheritDoc} |
1195 |
> |
* Test two values for equality. Differs from o1.equals(o2) only in |
1196 |
> |
* that it copes with <tt>null</tt> o1 properly. |
1197 |
|
*/ |
1198 |
< |
public NavigableMap<K,V> navigableHeadMap(K toKey) { |
1199 |
< |
return new SubMap(toKey, true); |
1198 |
> |
final static boolean valEquals(Object o1, Object o2) { |
1199 |
> |
return (o1==null ? o2==null : o1.equals(o2)); |
1200 |
|
} |
1201 |
|
|
1202 |
|
/** |
1203 |
< |
* @throws ClassCastException {@inheritDoc} |
970 |
< |
* @throws NullPointerException if <tt>fromKey</tt> is null |
971 |
< |
* and this map uses natural ordering, or its comparator |
972 |
< |
* does not permit null keys |
973 |
< |
* @throws IllegalArgumentException {@inheritDoc} |
1203 |
> |
* Return SimpleImmutableEntry for entry, or null if null |
1204 |
|
*/ |
1205 |
< |
public NavigableMap<K,V> navigableTailMap(K fromKey) { |
1206 |
< |
return new SubMap(fromKey, false); |
1205 |
> |
static <K,V> Map.Entry<K,V> exportEntry(TreeMap.Entry<K,V> e) { |
1206 |
> |
return e == null? null : |
1207 |
> |
new AbstractMap.SimpleImmutableEntry<K,V>(e); |
1208 |
|
} |
1209 |
|
|
1210 |
|
/** |
1211 |
< |
* Equivalent to {@link #navigableSubMap} but with a return type |
981 |
< |
* conforming to the <tt>SortedMap</tt> interface. |
982 |
< |
* |
983 |
< |
* <p>{@inheritDoc} |
984 |
< |
* |
985 |
< |
* @throws ClassCastException {@inheritDoc} |
986 |
< |
* @throws NullPointerException if <tt>fromKey</tt> or <tt>toKey</tt> is |
987 |
< |
* null and this map uses natural ordering, or its comparator |
988 |
< |
* does not permit null keys |
989 |
< |
* @throws IllegalArgumentException {@inheritDoc} |
1211 |
> |
* Return key for entry, or null if null |
1212 |
|
*/ |
1213 |
< |
public SortedMap<K,V> subMap(K fromKey, K toKey) { |
1214 |
< |
return new SubMap(fromKey, toKey); |
1213 |
> |
static <K,V> K keyOrNull(TreeMap.Entry<K,V> e) { |
1214 |
> |
return e == null? null : e.key; |
1215 |
|
} |
1216 |
|
|
1217 |
|
/** |
1218 |
< |
* Equivalent to {@link #navigableHeadMap} but with a return type |
1219 |
< |
* conforming to the <tt>SortedMap</tt> interface. |
998 |
< |
* |
999 |
< |
* <p>{@inheritDoc} |
1000 |
< |
* |
1001 |
< |
* @throws ClassCastException {@inheritDoc} |
1002 |
< |
* @throws NullPointerException if <tt>toKey</tt> is null |
1003 |
< |
* and this map uses natural ordering, or its comparator |
1004 |
< |
* does not permit null keys |
1005 |
< |
* @throws IllegalArgumentException {@inheritDoc} |
1218 |
> |
* Returns the key corresponding to the specified Entry. |
1219 |
> |
* @throws NoSuchElementException if the Entry is null |
1220 |
|
*/ |
1221 |
< |
public SortedMap<K,V> headMap(K toKey) { |
1222 |
< |
return new SubMap(toKey, true); |
1221 |
> |
static <K> K key(Entry<K,?> e) { |
1222 |
> |
if (e==null) |
1223 |
> |
throw new NoSuchElementException(); |
1224 |
> |
return e.key; |
1225 |
|
} |
1226 |
|
|
1227 |
+ |
|
1228 |
+ |
// SubMaps |
1229 |
+ |
|
1230 |
|
/** |
1231 |
< |
* Equivalent to {@link #navigableTailMap} but with a return type |
1232 |
< |
* conforming to the <tt>SortedMap</tt> interface. |
1014 |
< |
* |
1015 |
< |
* <p>{@inheritDoc} |
1016 |
< |
* |
1017 |
< |
* @throws ClassCastException {@inheritDoc} |
1018 |
< |
* @throws NullPointerException if <tt>fromKey</tt> is null |
1019 |
< |
* and this map uses natural ordering, or its comparator |
1020 |
< |
* does not permit null keys |
1021 |
< |
* @throws IllegalArgumentException {@inheritDoc} |
1231 |
> |
* Dummy value serving as unmatchable fence key for unbounded |
1232 |
> |
* SubMapIterators |
1233 |
|
*/ |
1234 |
< |
public SortedMap<K,V> tailMap(K fromKey) { |
1024 |
< |
return new SubMap(fromKey, false); |
1025 |
< |
} |
1234 |
> |
private static final Object UNBOUNDED = new Object(); |
1235 |
|
|
1236 |
< |
private class SubMap |
1237 |
< |
extends AbstractMap<K,V> |
1238 |
< |
implements NavigableMap<K,V>, java.io.Serializable { |
1239 |
< |
private static final long serialVersionUID = -6520786458950516097L; |
1236 |
> |
/** |
1237 |
> |
* @serial include |
1238 |
> |
*/ |
1239 |
> |
static abstract class NavigableSubMap<K,V> extends AbstractMap<K,V> |
1240 |
> |
implements NavigableMap<K,V>, java.io.Serializable { |
1241 |
> |
/** |
1242 |
> |
* The backing map. |
1243 |
> |
*/ |
1244 |
> |
final TreeMap<K,V> m; |
1245 |
|
|
1246 |
|
/** |
1247 |
< |
* fromKey is significant only if fromStart is false. Similarly, |
1248 |
< |
* toKey is significant only if toStart is false. |
1247 |
> |
* Endpoints are represented as triples (fromStart, lo, |
1248 |
> |
* loInclusive) and (toEnd, hi, hiInclusive). If fromStart is |
1249 |
> |
* true, then the low (absolute) bound is the start of the |
1250 |
> |
* backing map, and the other values are ignored. Otherwise, |
1251 |
> |
* if loInclusive is true, lo is the inclusive bound, else lo |
1252 |
> |
* is the exclusive bound. Similarly for the upper bound. |
1253 |
|
*/ |
1254 |
< |
private boolean fromStart = false, toEnd = false; |
1255 |
< |
private K fromKey, toKey; |
1254 |
> |
final K lo, hi; |
1255 |
> |
final boolean fromStart, toEnd; |
1256 |
> |
final boolean loInclusive, hiInclusive; |
1257 |
> |
|
1258 |
> |
NavigableSubMap(TreeMap<K,V> m, |
1259 |
> |
boolean fromStart, K lo, boolean loInclusive, |
1260 |
> |
boolean toEnd, K hi, boolean hiInclusive) { |
1261 |
> |
if (!fromStart && !toEnd) { |
1262 |
> |
if (m.compare(lo, hi) > 0) |
1263 |
> |
throw new IllegalArgumentException("fromKey > toKey"); |
1264 |
> |
} else { |
1265 |
> |
if (!fromStart) // type check |
1266 |
> |
m.compare(lo, lo); |
1267 |
> |
if (!toEnd) |
1268 |
> |
m.compare(hi, hi); |
1269 |
> |
} |
1270 |
|
|
1271 |
< |
SubMap(K fromKey, K toKey) { |
1272 |
< |
if (compare(fromKey, toKey) > 0) |
1273 |
< |
throw new IllegalArgumentException("fromKey > toKey"); |
1274 |
< |
this.fromKey = fromKey; |
1275 |
< |
this.toKey = toKey; |
1271 |
> |
this.m = m; |
1272 |
> |
this.fromStart = fromStart; |
1273 |
> |
this.lo = lo; |
1274 |
> |
this.loInclusive = loInclusive; |
1275 |
> |
this.toEnd = toEnd; |
1276 |
> |
this.hi = hi; |
1277 |
> |
this.hiInclusive = hiInclusive; |
1278 |
|
} |
1279 |
|
|
1280 |
< |
SubMap(K key, boolean headMap) { |
1281 |
< |
compare(key, key); // Type-check key |
1282 |
< |
|
1283 |
< |
if (headMap) { |
1284 |
< |
fromStart = true; |
1285 |
< |
toKey = key; |
1286 |
< |
} else { |
1287 |
< |
toEnd = true; |
1288 |
< |
fromKey = key; |
1280 |
> |
// internal utilities |
1281 |
> |
|
1282 |
> |
final boolean tooLow(Object key) { |
1283 |
> |
if (!fromStart) { |
1284 |
> |
int c = m.compare(key, lo); |
1285 |
> |
if (c < 0 || (c == 0 && !loInclusive)) |
1286 |
> |
return true; |
1287 |
> |
} |
1288 |
> |
return false; |
1289 |
> |
} |
1290 |
> |
|
1291 |
> |
final boolean tooHigh(Object key) { |
1292 |
> |
if (!toEnd) { |
1293 |
> |
int c = m.compare(key, hi); |
1294 |
> |
if (c > 0 || (c == 0 && !hiInclusive)) |
1295 |
> |
return true; |
1296 |
|
} |
1297 |
+ |
return false; |
1298 |
|
} |
1299 |
|
|
1300 |
< |
SubMap(boolean fromStart, K fromKey, boolean toEnd, K toKey) { |
1301 |
< |
this.fromStart = fromStart; |
1302 |
< |
this.fromKey= fromKey; |
1303 |
< |
this.toEnd = toEnd; |
1304 |
< |
this.toKey = toKey; |
1300 |
> |
final boolean inRange(Object key) { |
1301 |
> |
return !tooLow(key) && !tooHigh(key); |
1302 |
> |
} |
1303 |
> |
|
1304 |
> |
final boolean inClosedRange(Object key) { |
1305 |
> |
return (fromStart || m.compare(key, lo) >= 0) |
1306 |
> |
&& (toEnd || m.compare(hi, key) >= 0); |
1307 |
> |
} |
1308 |
> |
|
1309 |
> |
final boolean inRange(Object key, boolean inclusive) { |
1310 |
> |
return inclusive ? inRange(key) : inClosedRange(key); |
1311 |
> |
} |
1312 |
> |
|
1313 |
> |
/* |
1314 |
> |
* Absolute versions of relation operations. |
1315 |
> |
* Subclasses map to these using like-named "sub" |
1316 |
> |
* versions that invert senses for descending maps |
1317 |
> |
*/ |
1318 |
> |
|
1319 |
> |
final TreeMap.Entry<K,V> absLowest() { |
1320 |
> |
TreeMap.Entry<K,V> e = |
1321 |
> |
(fromStart ? m.getFirstEntry() : |
1322 |
> |
(loInclusive ? m.getCeilingEntry(lo) : |
1323 |
> |
m.getHigherEntry(lo))); |
1324 |
> |
return (e == null || tooHigh(e.key)) ? null : e; |
1325 |
> |
} |
1326 |
> |
|
1327 |
> |
final TreeMap.Entry<K,V> absHighest() { |
1328 |
> |
TreeMap.Entry<K,V> e = |
1329 |
> |
(toEnd ? m.getLastEntry() : |
1330 |
> |
(hiInclusive ? m.getFloorEntry(hi) : |
1331 |
> |
m.getLowerEntry(hi))); |
1332 |
> |
return (e == null || tooLow(e.key)) ? null : e; |
1333 |
> |
} |
1334 |
> |
|
1335 |
> |
final TreeMap.Entry<K,V> absCeiling(K key) { |
1336 |
> |
if (tooLow(key)) |
1337 |
> |
return absLowest(); |
1338 |
> |
TreeMap.Entry<K,V> e = m.getCeilingEntry(key); |
1339 |
> |
return (e == null || tooHigh(e.key)) ? null : e; |
1340 |
> |
} |
1341 |
> |
|
1342 |
> |
final TreeMap.Entry<K,V> absHigher(K key) { |
1343 |
> |
if (tooLow(key)) |
1344 |
> |
return absLowest(); |
1345 |
> |
TreeMap.Entry<K,V> e = m.getHigherEntry(key); |
1346 |
> |
return (e == null || tooHigh(e.key)) ? null : e; |
1347 |
> |
} |
1348 |
> |
|
1349 |
> |
final TreeMap.Entry<K,V> absFloor(K key) { |
1350 |
> |
if (tooHigh(key)) |
1351 |
> |
return absHighest(); |
1352 |
> |
TreeMap.Entry<K,V> e = m.getFloorEntry(key); |
1353 |
> |
return (e == null || tooLow(e.key)) ? null : e; |
1354 |
> |
} |
1355 |
> |
|
1356 |
> |
final TreeMap.Entry<K,V> absLower(K key) { |
1357 |
> |
if (tooHigh(key)) |
1358 |
> |
return absHighest(); |
1359 |
> |
TreeMap.Entry<K,V> e = m.getLowerEntry(key); |
1360 |
> |
return (e == null || tooLow(e.key)) ? null : e; |
1361 |
|
} |
1362 |
|
|
1363 |
+ |
/** Returns the absolute high fence for ascending traversal */ |
1364 |
+ |
final TreeMap.Entry<K,V> absHighFence() { |
1365 |
+ |
return (toEnd ? null : (hiInclusive ? |
1366 |
+ |
m.getHigherEntry(hi) : |
1367 |
+ |
m.getCeilingEntry(hi))); |
1368 |
+ |
} |
1369 |
+ |
|
1370 |
+ |
/** Return the absolute low fence for descending traversal */ |
1371 |
+ |
final TreeMap.Entry<K,V> absLowFence() { |
1372 |
+ |
return (fromStart ? null : (loInclusive ? |
1373 |
+ |
m.getLowerEntry(lo) : |
1374 |
+ |
m.getFloorEntry(lo))); |
1375 |
+ |
} |
1376 |
+ |
|
1377 |
+ |
// Abstract methods defined in ascending vs descending classes |
1378 |
+ |
// These relay to the appropriate absolute versions |
1379 |
+ |
|
1380 |
+ |
abstract TreeMap.Entry<K,V> subLowest(); |
1381 |
+ |
abstract TreeMap.Entry<K,V> subHighest(); |
1382 |
+ |
abstract TreeMap.Entry<K,V> subCeiling(K key); |
1383 |
+ |
abstract TreeMap.Entry<K,V> subHigher(K key); |
1384 |
+ |
abstract TreeMap.Entry<K,V> subFloor(K key); |
1385 |
+ |
abstract TreeMap.Entry<K,V> subLower(K key); |
1386 |
+ |
|
1387 |
+ |
/** Returns ascending iterator from the perspective of this submap */ |
1388 |
+ |
abstract Iterator<K> keyIterator(); |
1389 |
+ |
|
1390 |
+ |
/** Returns descending iterator from the perspective of this submap */ |
1391 |
+ |
abstract Iterator<K> descendingKeyIterator(); |
1392 |
+ |
|
1393 |
+ |
// public methods |
1394 |
+ |
|
1395 |
|
public boolean isEmpty() { |
1396 |
< |
return entrySet().isEmpty(); |
1396 |
> |
return (fromStart && toEnd) ? m.isEmpty() : entrySet().isEmpty(); |
1397 |
|
} |
1398 |
|
|
1399 |
< |
public boolean containsKey(Object key) { |
1400 |
< |
return inRange(key) && TreeMap.this.containsKey(key); |
1399 |
> |
public int size() { |
1400 |
> |
return (fromStart && toEnd) ? m.size() : entrySet().size(); |
1401 |
|
} |
1402 |
|
|
1403 |
< |
public V get(Object key) { |
1404 |
< |
if (!inRange(key)) |
1075 |
< |
return null; |
1076 |
< |
return TreeMap.this.get(key); |
1403 |
> |
public final boolean containsKey(Object key) { |
1404 |
> |
return inRange(key) && m.containsKey(key); |
1405 |
|
} |
1406 |
|
|
1407 |
< |
public V put(K key, V value) { |
1407 |
> |
public final V put(K key, V value) { |
1408 |
|
if (!inRange(key)) |
1409 |
|
throw new IllegalArgumentException("key out of range"); |
1410 |
< |
return TreeMap.this.put(key, value); |
1410 |
> |
return m.put(key, value); |
1411 |
|
} |
1412 |
|
|
1413 |
< |
public V remove(Object key) { |
1414 |
< |
if (!inRange(key)) |
1087 |
< |
return null; |
1088 |
< |
return TreeMap.this.remove(key); |
1413 |
> |
public final V get(Object key) { |
1414 |
> |
return !inRange(key)? null : m.get(key); |
1415 |
|
} |
1416 |
|
|
1417 |
< |
public Comparator<? super K> comparator() { |
1418 |
< |
return comparator; |
1417 |
> |
public final V remove(Object key) { |
1418 |
> |
return !inRange(key)? null : m.remove(key); |
1419 |
|
} |
1420 |
|
|
1421 |
< |
public K firstKey() { |
1422 |
< |
TreeMap.Entry<K,V> e = fromStart ? getFirstEntry() : getCeilingEntry(fromKey); |
1097 |
< |
K first = key(e); |
1098 |
< |
if (!toEnd && compare(first, toKey) >= 0) |
1099 |
< |
throw new NoSuchElementException(); |
1100 |
< |
return first; |
1421 |
> |
public final Map.Entry<K,V> ceilingEntry(K key) { |
1422 |
> |
return exportEntry(subCeiling(key)); |
1423 |
|
} |
1424 |
|
|
1425 |
< |
public K lastKey() { |
1426 |
< |
TreeMap.Entry<K,V> e = toEnd ? getLastEntry() : getLowerEntry(toKey); |
1105 |
< |
K last = key(e); |
1106 |
< |
if (!fromStart && compare(last, fromKey) < 0) |
1107 |
< |
throw new NoSuchElementException(); |
1108 |
< |
return last; |
1425 |
> |
public final K ceilingKey(K key) { |
1426 |
> |
return keyOrNull(subCeiling(key)); |
1427 |
|
} |
1428 |
|
|
1429 |
< |
public Map.Entry<K,V> firstEntry() { |
1430 |
< |
TreeMap.Entry<K,V> e = fromStart ? |
1113 |
< |
getFirstEntry() : getCeilingEntry(fromKey); |
1114 |
< |
if (e == null || (!toEnd && compare(e.key, toKey) >= 0)) |
1115 |
< |
return null; |
1116 |
< |
return e; |
1429 |
> |
public final Map.Entry<K,V> higherEntry(K key) { |
1430 |
> |
return exportEntry(subHigher(key)); |
1431 |
|
} |
1432 |
|
|
1433 |
< |
public Map.Entry<K,V> lastEntry() { |
1434 |
< |
TreeMap.Entry<K,V> e = toEnd ? |
1121 |
< |
getLastEntry() : getLowerEntry(toKey); |
1122 |
< |
if (e == null || (!fromStart && compare(e.key, fromKey) < 0)) |
1123 |
< |
return null; |
1124 |
< |
return e; |
1433 |
> |
public final K higherKey(K key) { |
1434 |
> |
return keyOrNull(subHigher(key)); |
1435 |
|
} |
1436 |
|
|
1437 |
< |
public Map.Entry<K,V> pollFirstEntry() { |
1438 |
< |
TreeMap.Entry<K,V> e = fromStart ? |
1129 |
< |
getFirstEntry() : getCeilingEntry(fromKey); |
1130 |
< |
if (e == null || (!toEnd && compare(e.key, toKey) >= 0)) |
1131 |
< |
return null; |
1132 |
< |
Map.Entry<K,V> result = new AbstractMap.SimpleImmutableEntry<K,V>(e); |
1133 |
< |
deleteEntry(e); |
1134 |
< |
return result; |
1437 |
> |
public final Map.Entry<K,V> floorEntry(K key) { |
1438 |
> |
return exportEntry(subFloor(key)); |
1439 |
|
} |
1440 |
|
|
1441 |
< |
public Map.Entry<K,V> pollLastEntry() { |
1442 |
< |
TreeMap.Entry<K,V> e = toEnd ? |
1139 |
< |
getLastEntry() : getLowerEntry(toKey); |
1140 |
< |
if (e == null || (!fromStart && compare(e.key, fromKey) < 0)) |
1141 |
< |
return null; |
1142 |
< |
Map.Entry<K,V> result = new AbstractMap.SimpleImmutableEntry<K,V>(e); |
1143 |
< |
deleteEntry(e); |
1144 |
< |
return result; |
1441 |
> |
public final K floorKey(K key) { |
1442 |
> |
return keyOrNull(subFloor(key)); |
1443 |
|
} |
1444 |
|
|
1445 |
< |
private TreeMap.Entry<K,V> subceiling(K key) { |
1446 |
< |
TreeMap.Entry<K,V> e = (!fromStart && compare(key, fromKey) < 0)? |
1149 |
< |
getCeilingEntry(fromKey) : getCeilingEntry(key); |
1150 |
< |
if (e == null || (!toEnd && compare(e.key, toKey) >= 0)) |
1151 |
< |
return null; |
1152 |
< |
return e; |
1445 |
> |
public final Map.Entry<K,V> lowerEntry(K key) { |
1446 |
> |
return exportEntry(subLower(key)); |
1447 |
|
} |
1448 |
|
|
1449 |
< |
public Map.Entry<K,V> ceilingEntry(K key) { |
1450 |
< |
TreeMap.Entry<K,V> e = subceiling(key); |
1157 |
< |
return e == null? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
1449 |
> |
public final K lowerKey(K key) { |
1450 |
> |
return keyOrNull(subLower(key)); |
1451 |
|
} |
1452 |
|
|
1453 |
< |
public K ceilingKey(K key) { |
1454 |
< |
TreeMap.Entry<K,V> e = subceiling(key); |
1162 |
< |
return e == null? null : e.key; |
1453 |
> |
public final K firstKey() { |
1454 |
> |
return key(subLowest()); |
1455 |
|
} |
1456 |
|
|
1457 |
< |
|
1458 |
< |
private TreeMap.Entry<K,V> subhigher(K key) { |
1167 |
< |
TreeMap.Entry<K,V> e = (!fromStart && compare(key, fromKey) < 0)? |
1168 |
< |
getCeilingEntry(fromKey) : getHigherEntry(key); |
1169 |
< |
if (e == null || (!toEnd && compare(e.key, toKey) >= 0)) |
1170 |
< |
return null; |
1171 |
< |
return e; |
1457 |
> |
public final K lastKey() { |
1458 |
> |
return key(subHighest()); |
1459 |
|
} |
1460 |
|
|
1461 |
< |
public Map.Entry<K,V> higherEntry(K key) { |
1462 |
< |
TreeMap.Entry<K,V> e = subhigher(key); |
1176 |
< |
return e == null? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
1461 |
> |
public final Map.Entry<K,V> firstEntry() { |
1462 |
> |
return exportEntry(subLowest()); |
1463 |
|
} |
1464 |
|
|
1465 |
< |
public K higherKey(K key) { |
1466 |
< |
TreeMap.Entry<K,V> e = subhigher(key); |
1181 |
< |
return e == null? null : e.key; |
1465 |
> |
public final Map.Entry<K,V> lastEntry() { |
1466 |
> |
return exportEntry(subHighest()); |
1467 |
|
} |
1468 |
|
|
1469 |
< |
private TreeMap.Entry<K,V> subfloor(K key) { |
1470 |
< |
TreeMap.Entry<K,V> e = (!toEnd && compare(key, toKey) >= 0)? |
1471 |
< |
getLowerEntry(toKey) : getFloorEntry(key); |
1472 |
< |
if (e == null || (!fromStart && compare(e.key, fromKey) < 0)) |
1473 |
< |
return null; |
1474 |
< |
return e; |
1469 |
> |
public final Map.Entry<K,V> pollFirstEntry() { |
1470 |
> |
TreeMap.Entry<K,V> e = subLowest(); |
1471 |
> |
Map.Entry<K,V> result = exportEntry(e); |
1472 |
> |
if (e != null) |
1473 |
> |
m.deleteEntry(e); |
1474 |
> |
return result; |
1475 |
|
} |
1476 |
|
|
1477 |
< |
public Map.Entry<K,V> floorEntry(K key) { |
1478 |
< |
TreeMap.Entry<K,V> e = subfloor(key); |
1479 |
< |
return e == null? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
1477 |
> |
public final Map.Entry<K,V> pollLastEntry() { |
1478 |
> |
TreeMap.Entry<K,V> e = subHighest(); |
1479 |
> |
Map.Entry<K,V> result = exportEntry(e); |
1480 |
> |
if (e != null) |
1481 |
> |
m.deleteEntry(e); |
1482 |
> |
return result; |
1483 |
|
} |
1484 |
|
|
1485 |
< |
public K floorKey(K key) { |
1486 |
< |
TreeMap.Entry<K,V> e = subfloor(key); |
1487 |
< |
return e == null? null : e.key; |
1485 |
> |
// Views |
1486 |
> |
transient NavigableMap<K,V> descendingMapView = null; |
1487 |
> |
transient EntrySetView entrySetView = null; |
1488 |
> |
transient KeySet<K> navigableKeySetView = null; |
1489 |
> |
|
1490 |
> |
public final NavigableSet<K> navigableKeySet() { |
1491 |
> |
KeySet<K> nksv = navigableKeySetView; |
1492 |
> |
return (nksv != null) ? nksv : |
1493 |
> |
(navigableKeySetView = new TreeMap.KeySet(this)); |
1494 |
|
} |
1495 |
|
|
1496 |
< |
private TreeMap.Entry<K,V> sublower(K key) { |
1497 |
< |
TreeMap.Entry<K,V> e = (!toEnd && compare(key, toKey) >= 0)? |
1204 |
< |
getLowerEntry(toKey) : getLowerEntry(key); |
1205 |
< |
if (e == null || (!fromStart && compare(e.key, fromKey) < 0)) |
1206 |
< |
return null; |
1207 |
< |
return e; |
1496 |
> |
public final Set<K> keySet() { |
1497 |
> |
return navigableKeySet(); |
1498 |
|
} |
1499 |
|
|
1500 |
< |
public Map.Entry<K,V> lowerEntry(K key) { |
1501 |
< |
TreeMap.Entry<K,V> e = sublower(key); |
1212 |
< |
return e == null? null : new AbstractMap.SimpleImmutableEntry<K,V>(e); |
1500 |
> |
public NavigableSet<K> descendingKeySet() { |
1501 |
> |
return descendingMap().navigableKeySet(); |
1502 |
|
} |
1503 |
|
|
1504 |
< |
public K lowerKey(K key) { |
1505 |
< |
TreeMap.Entry<K,V> e = sublower(key); |
1217 |
< |
return e == null? null : e.key; |
1504 |
> |
public final SortedMap<K,V> subMap(K fromKey, K toKey) { |
1505 |
> |
return subMap(fromKey, true, toKey, false); |
1506 |
|
} |
1507 |
|
|
1508 |
< |
private transient Set<Map.Entry<K,V>> entrySet = null; |
1508 |
> |
public final SortedMap<K,V> headMap(K toKey) { |
1509 |
> |
return headMap(toKey, false); |
1510 |
> |
} |
1511 |
|
|
1512 |
< |
public Set<Map.Entry<K,V>> entrySet() { |
1513 |
< |
Set<Map.Entry<K,V>> es = entrySet; |
1224 |
< |
return (es != null)? es : (entrySet = new EntrySetView()); |
1512 |
> |
public final SortedMap<K,V> tailMap(K fromKey) { |
1513 |
> |
return tailMap(fromKey, true); |
1514 |
|
} |
1515 |
|
|
1516 |
< |
private class EntrySetView extends AbstractSet<Map.Entry<K,V>> { |
1516 |
> |
// View classes |
1517 |
> |
|
1518 |
> |
abstract class EntrySetView extends AbstractSet<Map.Entry<K,V>> { |
1519 |
|
private transient int size = -1, sizeModCount; |
1520 |
|
|
1521 |
|
public int size() { |
1522 |
< |
if (size == -1 || sizeModCount != TreeMap.this.modCount) { |
1523 |
< |
size = 0; sizeModCount = TreeMap.this.modCount; |
1522 |
> |
if (fromStart && toEnd) |
1523 |
> |
return m.size(); |
1524 |
> |
if (size == -1 || sizeModCount != m.modCount) { |
1525 |
> |
sizeModCount = m.modCount; |
1526 |
> |
size = 0; |
1527 |
|
Iterator i = iterator(); |
1528 |
|
while (i.hasNext()) { |
1529 |
|
size++; |
1534 |
|
} |
1535 |
|
|
1536 |
|
public boolean isEmpty() { |
1537 |
< |
return !iterator().hasNext(); |
1537 |
> |
TreeMap.Entry<K,V> n = absLowest(); |
1538 |
> |
return n == null || tooHigh(n.key); |
1539 |
|
} |
1540 |
|
|
1541 |
|
public boolean contains(Object o) { |
1545 |
|
K key = entry.getKey(); |
1546 |
|
if (!inRange(key)) |
1547 |
|
return false; |
1548 |
< |
TreeMap.Entry node = getEntry(key); |
1548 |
> |
TreeMap.Entry node = m.getEntry(key); |
1549 |
|
return node != null && |
1550 |
< |
valEquals(node.getValue(), entry.getValue()); |
1550 |
> |
valEquals(node.getValue(), entry.getValue()); |
1551 |
|
} |
1552 |
|
|
1553 |
|
public boolean remove(Object o) { |
1557 |
|
K key = entry.getKey(); |
1558 |
|
if (!inRange(key)) |
1559 |
|
return false; |
1560 |
< |
TreeMap.Entry<K,V> node = getEntry(key); |
1560 |
> |
TreeMap.Entry<K,V> node = m.getEntry(key); |
1561 |
|
if (node!=null && valEquals(node.getValue(),entry.getValue())){ |
1562 |
< |
deleteEntry(node); |
1562 |
> |
m.deleteEntry(node); |
1563 |
|
return true; |
1564 |
|
} |
1565 |
|
return false; |
1566 |
|
} |
1272 |
– |
|
1273 |
– |
public Iterator<Map.Entry<K,V>> iterator() { |
1274 |
– |
return new SubMapEntryIterator( |
1275 |
– |
(fromStart ? getFirstEntry() : getCeilingEntry(fromKey)), |
1276 |
– |
(toEnd ? null : getCeilingEntry(toKey))); |
1277 |
– |
} |
1278 |
– |
} |
1279 |
– |
|
1280 |
– |
private transient Set<Map.Entry<K,V>> descendingEntrySetView = null; |
1281 |
– |
private transient Set<K> descendingKeySetView = null; |
1282 |
– |
|
1283 |
– |
public Set<Map.Entry<K,V>> descendingEntrySet() { |
1284 |
– |
Set<Map.Entry<K,V>> es = descendingEntrySetView; |
1285 |
– |
return (es != null) ? es : |
1286 |
– |
(descendingEntrySetView = new DescendingEntrySetView()); |
1567 |
|
} |
1568 |
|
|
1569 |
< |
public Set<K> descendingKeySet() { |
1570 |
< |
Set<K> ks = descendingKeySetView; |
1571 |
< |
return (ks != null) ? ks : |
1572 |
< |
(descendingKeySetView = new DescendingKeySetView()); |
1573 |
< |
} |
1569 |
> |
/** |
1570 |
> |
* Iterators for SubMaps |
1571 |
> |
*/ |
1572 |
> |
abstract class SubMapIterator<T> implements Iterator<T> { |
1573 |
> |
TreeMap.Entry<K,V> lastReturned; |
1574 |
> |
TreeMap.Entry<K,V> next; |
1575 |
> |
final Object fenceKey; |
1576 |
> |
int expectedModCount; |
1577 |
|
|
1578 |
< |
private class DescendingEntrySetView extends EntrySetView { |
1579 |
< |
public Iterator<Map.Entry<K,V>> iterator() { |
1580 |
< |
return new DescendingSubMapEntryIterator |
1581 |
< |
((toEnd ? getLastEntry() : getLowerEntry(toKey)), |
1582 |
< |
(fromStart ? null : getLowerEntry(fromKey))); |
1578 |
> |
SubMapIterator(TreeMap.Entry<K,V> first, |
1579 |
> |
TreeMap.Entry<K,V> fence) { |
1580 |
> |
expectedModCount = m.modCount; |
1581 |
> |
lastReturned = null; |
1582 |
> |
next = first; |
1583 |
> |
fenceKey = fence == null ? UNBOUNDED : fence.key; |
1584 |
|
} |
1301 |
– |
} |
1302 |
– |
|
1303 |
– |
private class DescendingKeySetView extends AbstractSet<K> { |
1304 |
– |
public Iterator<K> iterator() { |
1305 |
– |
return new Iterator<K>() { |
1306 |
– |
private Iterator<Entry<K,V>> i = descendingEntrySet().iterator(); |
1585 |
|
|
1586 |
< |
public boolean hasNext() { return i.hasNext(); } |
1587 |
< |
public K next() { return i.next().getKey(); } |
1310 |
< |
public void remove() { i.remove(); } |
1311 |
< |
}; |
1586 |
> |
public final boolean hasNext() { |
1587 |
> |
return next != null && next.key != fenceKey; |
1588 |
|
} |
1589 |
|
|
1590 |
< |
public int size() { |
1591 |
< |
return SubMap.this.size(); |
1590 |
> |
final TreeMap.Entry<K,V> nextEntry() { |
1591 |
> |
TreeMap.Entry<K,V> e = next; |
1592 |
> |
if (e == null || e.key == fenceKey) |
1593 |
> |
throw new NoSuchElementException(); |
1594 |
> |
if (m.modCount != expectedModCount) |
1595 |
> |
throw new ConcurrentModificationException(); |
1596 |
> |
next = successor(e); |
1597 |
> |
lastReturned = e; |
1598 |
> |
return e; |
1599 |
|
} |
1600 |
|
|
1601 |
< |
public boolean contains(Object k) { |
1602 |
< |
return SubMap.this.containsKey(k); |
1601 |
> |
final TreeMap.Entry<K,V> prevEntry() { |
1602 |
> |
TreeMap.Entry<K,V> e = next; |
1603 |
> |
if (e == null || e.key == fenceKey) |
1604 |
> |
throw new NoSuchElementException(); |
1605 |
> |
if (m.modCount != expectedModCount) |
1606 |
> |
throw new ConcurrentModificationException(); |
1607 |
> |
next = predecessor(e); |
1608 |
> |
lastReturned = e; |
1609 |
> |
return e; |
1610 |
|
} |
1321 |
– |
} |
1611 |
|
|
1612 |
< |
public NavigableMap<K,V> navigableSubMap(K fromKey, K toKey) { |
1613 |
< |
if (!inRange2(fromKey)) |
1614 |
< |
throw new IllegalArgumentException("fromKey out of range"); |
1615 |
< |
if (!inRange2(toKey)) |
1616 |
< |
throw new IllegalArgumentException("toKey out of range"); |
1617 |
< |
return new SubMap(fromKey, toKey); |
1618 |
< |
} |
1612 |
> |
final void removeAscending() { |
1613 |
> |
if (lastReturned == null) |
1614 |
> |
throw new IllegalStateException(); |
1615 |
> |
if (m.modCount != expectedModCount) |
1616 |
> |
throw new ConcurrentModificationException(); |
1617 |
> |
// deleted entries are replaced by their successors |
1618 |
> |
if (lastReturned.left != null && lastReturned.right != null) |
1619 |
> |
next = lastReturned; |
1620 |
> |
m.deleteEntry(lastReturned); |
1621 |
> |
lastReturned = null; |
1622 |
> |
expectedModCount = m.modCount; |
1623 |
> |
} |
1624 |
|
|
1625 |
< |
public NavigableMap<K,V> navigableHeadMap(K toKey) { |
1626 |
< |
if (!inRange2(toKey)) |
1627 |
< |
throw new IllegalArgumentException("toKey out of range"); |
1628 |
< |
return new SubMap(fromStart, fromKey, false, toKey); |
1629 |
< |
} |
1625 |
> |
final void removeDescending() { |
1626 |
> |
if (lastReturned == null) |
1627 |
> |
throw new IllegalStateException(); |
1628 |
> |
if (m.modCount != expectedModCount) |
1629 |
> |
throw new ConcurrentModificationException(); |
1630 |
> |
m.deleteEntry(lastReturned); |
1631 |
> |
lastReturned = null; |
1632 |
> |
expectedModCount = m.modCount; |
1633 |
> |
} |
1634 |
|
|
1337 |
– |
public NavigableMap<K,V> navigableTailMap(K fromKey) { |
1338 |
– |
if (!inRange2(fromKey)) |
1339 |
– |
throw new IllegalArgumentException("fromKey out of range"); |
1340 |
– |
return new SubMap(false, fromKey, toEnd, toKey); |
1635 |
|
} |
1636 |
|
|
1637 |
< |
public SortedMap<K,V> subMap(K fromKey, K toKey) { |
1638 |
< |
return navigableSubMap(fromKey, toKey); |
1637 |
> |
final class SubMapEntryIterator extends SubMapIterator<Map.Entry<K,V>> { |
1638 |
> |
SubMapEntryIterator(TreeMap.Entry<K,V> first, |
1639 |
> |
TreeMap.Entry<K,V> fence) { |
1640 |
> |
super(first, fence); |
1641 |
> |
} |
1642 |
> |
public Map.Entry<K,V> next() { |
1643 |
> |
return nextEntry(); |
1644 |
> |
} |
1645 |
> |
public void remove() { |
1646 |
> |
removeAscending(); |
1647 |
> |
} |
1648 |
|
} |
1649 |
|
|
1650 |
< |
public SortedMap<K,V> headMap(K toKey) { |
1651 |
< |
return navigableHeadMap(toKey); |
1650 |
> |
final class SubMapKeyIterator extends SubMapIterator<K> { |
1651 |
> |
SubMapKeyIterator(TreeMap.Entry<K,V> first, |
1652 |
> |
TreeMap.Entry<K,V> fence) { |
1653 |
> |
super(first, fence); |
1654 |
> |
} |
1655 |
> |
public K next() { |
1656 |
> |
return nextEntry().key; |
1657 |
> |
} |
1658 |
> |
public void remove() { |
1659 |
> |
removeAscending(); |
1660 |
> |
} |
1661 |
|
} |
1662 |
|
|
1663 |
< |
public SortedMap<K,V> tailMap(K fromKey) { |
1664 |
< |
return navigableTailMap(fromKey); |
1665 |
< |
} |
1663 |
> |
final class DescendingSubMapEntryIterator extends SubMapIterator<Map.Entry<K,V>> { |
1664 |
> |
DescendingSubMapEntryIterator(TreeMap.Entry<K,V> last, |
1665 |
> |
TreeMap.Entry<K,V> fence) { |
1666 |
> |
super(last, fence); |
1667 |
> |
} |
1668 |
|
|
1669 |
< |
private boolean inRange(Object key) { |
1670 |
< |
return (fromStart || compare(key, fromKey) >= 0) && |
1671 |
< |
(toEnd || compare(key, toKey) < 0); |
1669 |
> |
public Map.Entry<K,V> next() { |
1670 |
> |
return prevEntry(); |
1671 |
> |
} |
1672 |
> |
public void remove() { |
1673 |
> |
removeDescending(); |
1674 |
> |
} |
1675 |
|
} |
1676 |
|
|
1677 |
< |
// This form allows the high endpoint (as well as all legit keys) |
1678 |
< |
private boolean inRange2(Object key) { |
1679 |
< |
return (fromStart || compare(key, fromKey) >= 0) && |
1680 |
< |
(toEnd || compare(key, toKey) <= 0); |
1677 |
> |
final class DescendingSubMapKeyIterator extends SubMapIterator<K> { |
1678 |
> |
DescendingSubMapKeyIterator(TreeMap.Entry<K,V> last, |
1679 |
> |
TreeMap.Entry<K,V> fence) { |
1680 |
> |
super(last, fence); |
1681 |
> |
} |
1682 |
> |
public K next() { |
1683 |
> |
return prevEntry().key; |
1684 |
> |
} |
1685 |
> |
public void remove() { |
1686 |
> |
removeDescending(); |
1687 |
> |
} |
1688 |
|
} |
1689 |
|
} |
1690 |
|
|
1691 |
|
/** |
1692 |
< |
* TreeMap Iterator. |
1692 |
> |
* @serial include |
1693 |
|
*/ |
1694 |
< |
abstract class PrivateEntryIterator<T> implements Iterator<T> { |
1695 |
< |
int expectedModCount = TreeMap.this.modCount; |
1372 |
< |
Entry<K,V> lastReturned = null; |
1373 |
< |
Entry<K,V> next; |
1694 |
> |
static final class AscendingSubMap<K,V> extends NavigableSubMap<K,V> { |
1695 |
> |
private static final long serialVersionUID = 912986545866124060L; |
1696 |
|
|
1697 |
< |
PrivateEntryIterator(Entry<K,V> first) { |
1698 |
< |
next = first; |
1697 |
> |
AscendingSubMap(TreeMap<K,V> m, |
1698 |
> |
boolean fromStart, K lo, boolean loInclusive, |
1699 |
> |
boolean toEnd, K hi, boolean hiInclusive) { |
1700 |
> |
super(m, fromStart, lo, loInclusive, toEnd, hi, hiInclusive); |
1701 |
|
} |
1702 |
|
|
1703 |
< |
public boolean hasNext() { |
1704 |
< |
return next != null; |
1703 |
> |
public Comparator<? super K> comparator() { |
1704 |
> |
return m.comparator(); |
1705 |
|
} |
1706 |
|
|
1707 |
< |
Entry<K,V> nextEntry() { |
1708 |
< |
if (next == null) |
1709 |
< |
throw new NoSuchElementException(); |
1710 |
< |
if (modCount != expectedModCount) |
1711 |
< |
throw new ConcurrentModificationException(); |
1712 |
< |
lastReturned = next; |
1713 |
< |
next = successor(next); |
1714 |
< |
return lastReturned; |
1707 |
> |
public NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive, |
1708 |
> |
K toKey, boolean toInclusive) { |
1709 |
> |
if (!inRange(fromKey, fromInclusive)) |
1710 |
> |
throw new IllegalArgumentException("fromKey out of range"); |
1711 |
> |
if (!inRange(toKey, toInclusive)) |
1712 |
> |
throw new IllegalArgumentException("toKey out of range"); |
1713 |
> |
return new AscendingSubMap(m, |
1714 |
> |
false, fromKey, fromInclusive, |
1715 |
> |
false, toKey, toInclusive); |
1716 |
|
} |
1717 |
|
|
1718 |
< |
public void remove() { |
1719 |
< |
if (lastReturned == null) |
1720 |
< |
throw new IllegalStateException(); |
1721 |
< |
if (modCount != expectedModCount) |
1722 |
< |
throw new ConcurrentModificationException(); |
1723 |
< |
if (lastReturned.left != null && lastReturned.right != null) |
1399 |
< |
next = lastReturned; |
1400 |
< |
deleteEntry(lastReturned); |
1401 |
< |
expectedModCount++; |
1402 |
< |
lastReturned = null; |
1718 |
> |
public NavigableMap<K,V> headMap(K toKey, boolean inclusive) { |
1719 |
> |
if (!inRange(toKey, inclusive)) |
1720 |
> |
throw new IllegalArgumentException("toKey out of range"); |
1721 |
> |
return new AscendingSubMap(m, |
1722 |
> |
fromStart, lo, loInclusive, |
1723 |
> |
false, toKey, inclusive); |
1724 |
|
} |
1404 |
– |
} |
1725 |
|
|
1726 |
< |
class EntryIterator extends PrivateEntryIterator<Map.Entry<K,V>> { |
1727 |
< |
EntryIterator(Entry<K,V> first) { |
1728 |
< |
super(first); |
1729 |
< |
} |
1730 |
< |
public Map.Entry<K,V> next() { |
1731 |
< |
return nextEntry(); |
1726 |
> |
public NavigableMap<K,V> tailMap(K fromKey, boolean inclusive){ |
1727 |
> |
if (!inRange(fromKey, inclusive)) |
1728 |
> |
throw new IllegalArgumentException("fromKey out of range"); |
1729 |
> |
return new AscendingSubMap(m, |
1730 |
> |
false, fromKey, inclusive, |
1731 |
> |
toEnd, hi, hiInclusive); |
1732 |
|
} |
1413 |
– |
} |
1733 |
|
|
1734 |
< |
class KeyIterator extends PrivateEntryIterator<K> { |
1735 |
< |
KeyIterator(Entry<K,V> first) { |
1736 |
< |
super(first); |
1734 |
> |
public NavigableMap<K,V> descendingMap() { |
1735 |
> |
NavigableMap<K,V> mv = descendingMapView; |
1736 |
> |
return (mv != null) ? mv : |
1737 |
> |
(descendingMapView = |
1738 |
> |
new DescendingSubMap(m, |
1739 |
> |
fromStart, lo, loInclusive, |
1740 |
> |
toEnd, hi, hiInclusive)); |
1741 |
|
} |
1419 |
– |
public K next() { |
1420 |
– |
return nextEntry().key; |
1421 |
– |
} |
1422 |
– |
} |
1742 |
|
|
1743 |
< |
class ValueIterator extends PrivateEntryIterator<V> { |
1744 |
< |
ValueIterator(Entry<K,V> first) { |
1426 |
< |
super(first); |
1427 |
< |
} |
1428 |
< |
public V next() { |
1429 |
< |
return nextEntry().value; |
1743 |
> |
Iterator<K> keyIterator() { |
1744 |
> |
return new SubMapKeyIterator(absLowest(), absHighFence()); |
1745 |
|
} |
1431 |
– |
} |
1432 |
– |
|
1433 |
– |
class SubMapEntryIterator extends PrivateEntryIterator<Map.Entry<K,V>> { |
1434 |
– |
private final K firstExcludedKey; |
1746 |
|
|
1747 |
< |
SubMapEntryIterator(Entry<K,V> first, Entry<K,V> firstExcluded) { |
1748 |
< |
super(first); |
1438 |
< |
firstExcludedKey = (firstExcluded == null |
1439 |
< |
? null |
1440 |
< |
: firstExcluded.key); |
1747 |
> |
Iterator<K> descendingKeyIterator() { |
1748 |
> |
return new DescendingSubMapKeyIterator(absHighest(), absLowFence()); |
1749 |
|
} |
1750 |
|
|
1751 |
< |
public boolean hasNext() { |
1752 |
< |
return next != null && next.key != firstExcludedKey; |
1751 |
> |
final class AscendingEntrySetView extends EntrySetView { |
1752 |
> |
public Iterator<Map.Entry<K,V>> iterator() { |
1753 |
> |
return new SubMapEntryIterator(absLowest(), absHighFence()); |
1754 |
> |
} |
1755 |
|
} |
1756 |
|
|
1757 |
< |
public Map.Entry<K,V> next() { |
1758 |
< |
if (next == null || next.key == firstExcludedKey) |
1759 |
< |
throw new NoSuchElementException(); |
1450 |
< |
return nextEntry(); |
1757 |
> |
public Set<Map.Entry<K,V>> entrySet() { |
1758 |
> |
EntrySetView es = entrySetView; |
1759 |
> |
return (es != null) ? es : new AscendingEntrySetView(); |
1760 |
|
} |
1761 |
+ |
|
1762 |
+ |
TreeMap.Entry<K,V> subLowest() { return absLowest(); } |
1763 |
+ |
TreeMap.Entry<K,V> subHighest() { return absHighest(); } |
1764 |
+ |
TreeMap.Entry<K,V> subCeiling(K key) { return absCeiling(key); } |
1765 |
+ |
TreeMap.Entry<K,V> subHigher(K key) { return absHigher(key); } |
1766 |
+ |
TreeMap.Entry<K,V> subFloor(K key) { return absFloor(key); } |
1767 |
+ |
TreeMap.Entry<K,V> subLower(K key) { return absLower(key); } |
1768 |
|
} |
1769 |
|
|
1770 |
|
/** |
1771 |
< |
* Base for Descending Iterators. |
1771 |
> |
* @serial include |
1772 |
|
*/ |
1773 |
< |
abstract class DescendingPrivateEntryIterator<T> extends PrivateEntryIterator<T> { |
1774 |
< |
DescendingPrivateEntryIterator(Entry<K,V> first) { |
1775 |
< |
super(first); |
1773 |
> |
static final class DescendingSubMap<K,V> extends NavigableSubMap<K,V> { |
1774 |
> |
private static final long serialVersionUID = 912986545866120460L; |
1775 |
> |
DescendingSubMap(TreeMap<K,V> m, |
1776 |
> |
boolean fromStart, K lo, boolean loInclusive, |
1777 |
> |
boolean toEnd, K hi, boolean hiInclusive) { |
1778 |
> |
super(m, fromStart, lo, loInclusive, toEnd, hi, hiInclusive); |
1779 |
|
} |
1780 |
|
|
1781 |
< |
Entry<K,V> nextEntry() { |
1782 |
< |
if (next == null) |
1464 |
< |
throw new NoSuchElementException(); |
1465 |
< |
if (modCount != expectedModCount) |
1466 |
< |
throw new ConcurrentModificationException(); |
1467 |
< |
lastReturned = next; |
1468 |
< |
next = predecessor(next); |
1469 |
< |
return lastReturned; |
1470 |
< |
} |
1471 |
< |
} |
1781 |
> |
private final Comparator<? super K> reverseComparator = |
1782 |
> |
Collections.reverseOrder(m.comparator); |
1783 |
|
|
1784 |
< |
class DescendingEntryIterator extends DescendingPrivateEntryIterator<Map.Entry<K,V>> { |
1785 |
< |
DescendingEntryIterator(Entry<K,V> first) { |
1475 |
< |
super(first); |
1784 |
> |
public Comparator<? super K> comparator() { |
1785 |
> |
return reverseComparator; |
1786 |
|
} |
1787 |
< |
public Map.Entry<K,V> next() { |
1788 |
< |
return nextEntry(); |
1787 |
> |
|
1788 |
> |
public NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive, |
1789 |
> |
K toKey, boolean toInclusive) { |
1790 |
> |
if (!inRange(fromKey, fromInclusive)) |
1791 |
> |
throw new IllegalArgumentException("fromKey out of range"); |
1792 |
> |
if (!inRange(toKey, toInclusive)) |
1793 |
> |
throw new IllegalArgumentException("toKey out of range"); |
1794 |
> |
return new DescendingSubMap(m, |
1795 |
> |
false, toKey, toInclusive, |
1796 |
> |
false, fromKey, fromInclusive); |
1797 |
|
} |
1480 |
– |
} |
1798 |
|
|
1799 |
< |
class DescendingKeyIterator extends DescendingPrivateEntryIterator<K> { |
1800 |
< |
DescendingKeyIterator(Entry<K,V> first) { |
1801 |
< |
super(first); |
1799 |
> |
public NavigableMap<K,V> headMap(K toKey, boolean inclusive) { |
1800 |
> |
if (!inRange(toKey, inclusive)) |
1801 |
> |
throw new IllegalArgumentException("toKey out of range"); |
1802 |
> |
return new DescendingSubMap(m, |
1803 |
> |
false, toKey, inclusive, |
1804 |
> |
toEnd, hi, hiInclusive); |
1805 |
|
} |
1806 |
< |
public K next() { |
1807 |
< |
return nextEntry().key; |
1806 |
> |
|
1807 |
> |
public NavigableMap<K,V> tailMap(K fromKey, boolean inclusive){ |
1808 |
> |
if (!inRange(fromKey, inclusive)) |
1809 |
> |
throw new IllegalArgumentException("fromKey out of range"); |
1810 |
> |
return new DescendingSubMap(m, |
1811 |
> |
fromStart, lo, loInclusive, |
1812 |
> |
false, fromKey, inclusive); |
1813 |
|
} |
1489 |
– |
} |
1814 |
|
|
1815 |
+ |
public NavigableMap<K,V> descendingMap() { |
1816 |
+ |
NavigableMap<K,V> mv = descendingMapView; |
1817 |
+ |
return (mv != null) ? mv : |
1818 |
+ |
(descendingMapView = |
1819 |
+ |
new AscendingSubMap(m, |
1820 |
+ |
fromStart, lo, loInclusive, |
1821 |
+ |
toEnd, hi, hiInclusive)); |
1822 |
+ |
} |
1823 |
|
|
1824 |
< |
class DescendingSubMapEntryIterator extends DescendingPrivateEntryIterator<Map.Entry<K,V>> { |
1825 |
< |
private final K lastExcludedKey; |
1824 |
> |
Iterator<K> keyIterator() { |
1825 |
> |
return new DescendingSubMapKeyIterator(absHighest(), absLowFence()); |
1826 |
> |
} |
1827 |
|
|
1828 |
< |
DescendingSubMapEntryIterator(Entry<K,V> last, Entry<K,V> lastExcluded) { |
1829 |
< |
super(last); |
1497 |
< |
lastExcludedKey = (lastExcluded == null |
1498 |
< |
? null |
1499 |
< |
: lastExcluded.key); |
1828 |
> |
Iterator<K> descendingKeyIterator() { |
1829 |
> |
return new SubMapKeyIterator(absLowest(), absHighFence()); |
1830 |
|
} |
1831 |
|
|
1832 |
< |
public boolean hasNext() { |
1833 |
< |
return next != null && next.key != lastExcludedKey; |
1832 |
> |
final class DescendingEntrySetView extends EntrySetView { |
1833 |
> |
public Iterator<Map.Entry<K,V>> iterator() { |
1834 |
> |
return new DescendingSubMapEntryIterator(absHighest(), absLowFence()); |
1835 |
> |
} |
1836 |
|
} |
1837 |
|
|
1838 |
< |
public Map.Entry<K,V> next() { |
1839 |
< |
if (next == null || next.key == lastExcludedKey) |
1840 |
< |
throw new NoSuchElementException(); |
1509 |
< |
return nextEntry(); |
1838 |
> |
public Set<Map.Entry<K,V>> entrySet() { |
1839 |
> |
EntrySetView es = entrySetView; |
1840 |
> |
return (es != null) ? es : new DescendingEntrySetView(); |
1841 |
|
} |
1842 |
|
|
1843 |
+ |
TreeMap.Entry<K,V> subLowest() { return absHighest(); } |
1844 |
+ |
TreeMap.Entry<K,V> subHighest() { return absLowest(); } |
1845 |
+ |
TreeMap.Entry<K,V> subCeiling(K key) { return absFloor(key); } |
1846 |
+ |
TreeMap.Entry<K,V> subHigher(K key) { return absLower(key); } |
1847 |
+ |
TreeMap.Entry<K,V> subFloor(K key) { return absCeiling(key); } |
1848 |
+ |
TreeMap.Entry<K,V> subLower(K key) { return absHigher(key); } |
1849 |
|
} |
1850 |
|
|
1851 |
|
/** |
1852 |
< |
* Compares two keys using the correct comparison method for this TreeMap. |
1852 |
> |
* This class exists solely for the sake of serialization |
1853 |
> |
* compatibility with previous releases of TreeMap that did not |
1854 |
> |
* support NavigableMap. It translates an old-version SubMap into |
1855 |
> |
* a new-version AscendingSubMap. This class is never otherwise |
1856 |
> |
* used. |
1857 |
> |
* |
1858 |
> |
* @serial include |
1859 |
|
*/ |
1860 |
< |
private int compare(Object k1, Object k2) { |
1861 |
< |
return comparator==null ? ((Comparable<? super K>)k1).compareTo((K)k2) |
1862 |
< |
: comparator.compare((K)k1, (K)k2); |
1860 |
> |
private class SubMap extends AbstractMap<K,V> |
1861 |
> |
implements SortedMap<K,V>, java.io.Serializable { |
1862 |
> |
private static final long serialVersionUID = -6520786458950516097L; |
1863 |
> |
private boolean fromStart = false, toEnd = false; |
1864 |
> |
private K fromKey, toKey; |
1865 |
> |
private Object readResolve() { |
1866 |
> |
return new AscendingSubMap(TreeMap.this, |
1867 |
> |
fromStart, fromKey, true, |
1868 |
> |
toEnd, toKey, false); |
1869 |
> |
} |
1870 |
> |
public Set<Map.Entry<K,V>> entrySet() { throw new InternalError(); } |
1871 |
> |
public K lastKey() { throw new InternalError(); } |
1872 |
> |
public K firstKey() { throw new InternalError(); } |
1873 |
> |
public SortedMap<K,V> subMap(K fromKey, K toKey) { throw new InternalError(); } |
1874 |
> |
public SortedMap<K,V> headMap(K toKey) { throw new InternalError(); } |
1875 |
> |
public SortedMap<K,V> tailMap(K fromKey) { throw new InternalError(); } |
1876 |
> |
public Comparator<? super K> comparator() { throw new InternalError(); } |
1877 |
|
} |
1878 |
|
|
1879 |
< |
/** |
1880 |
< |
* Test two values for equality. Differs from o1.equals(o2) only in |
1524 |
< |
* that it copes with <tt>null</tt> o1 properly. |
1525 |
< |
*/ |
1526 |
< |
private static boolean valEquals(Object o1, Object o2) { |
1527 |
< |
return (o1==null ? o2==null : o1.equals(o2)); |
1528 |
< |
} |
1879 |
> |
|
1880 |
> |
// Red-black mechanics |
1881 |
|
|
1882 |
|
private static final boolean RED = false; |
1883 |
|
private static final boolean BLACK = true; |
1887 |
|
* user (see Map.Entry). |
1888 |
|
*/ |
1889 |
|
|
1890 |
< |
static class Entry<K,V> implements Map.Entry<K,V> { |
1891 |
< |
K key; |
1890 |
> |
static final class Entry<K,V> implements Map.Entry<K,V> { |
1891 |
> |
K key; |
1892 |
|
V value; |
1893 |
|
Entry<K,V> left = null; |
1894 |
|
Entry<K,V> right = null; |
1939 |
|
public boolean equals(Object o) { |
1940 |
|
if (!(o instanceof Map.Entry)) |
1941 |
|
return false; |
1942 |
< |
Map.Entry e = (Map.Entry)o; |
1942 |
> |
Map.Entry<?,?> e = (Map.Entry<?,?>)o; |
1943 |
|
|
1944 |
|
return valEquals(key,e.getKey()) && valEquals(value,e.getValue()); |
1945 |
|
} |
1959 |
|
* Returns the first Entry in the TreeMap (according to the TreeMap's |
1960 |
|
* key-sort function). Returns null if the TreeMap is empty. |
1961 |
|
*/ |
1962 |
< |
private Entry<K,V> getFirstEntry() { |
1962 |
> |
final Entry<K,V> getFirstEntry() { |
1963 |
|
Entry<K,V> p = root; |
1964 |
|
if (p != null) |
1965 |
|
while (p.left != null) |
1971 |
|
* Returns the last Entry in the TreeMap (according to the TreeMap's |
1972 |
|
* key-sort function). Returns null if the TreeMap is empty. |
1973 |
|
*/ |
1974 |
< |
private Entry<K,V> getLastEntry() { |
1974 |
> |
final Entry<K,V> getLastEntry() { |
1975 |
|
Entry<K,V> p = root; |
1976 |
|
if (p != null) |
1977 |
|
while (p.right != null) |
1982 |
|
/** |
1983 |
|
* Returns the successor of the specified Entry, or null if no such. |
1984 |
|
*/ |
1985 |
< |
private Entry<K,V> successor(Entry<K,V> t) { |
1985 |
> |
static <K,V> TreeMap.Entry<K,V> successor(Entry<K,V> t) { |
1986 |
|
if (t == null) |
1987 |
|
return null; |
1988 |
|
else if (t.right != null) { |
2004 |
|
/** |
2005 |
|
* Returns the predecessor of the specified Entry, or null if no such. |
2006 |
|
*/ |
2007 |
< |
private Entry<K,V> predecessor(Entry<K,V> t) { |
2007 |
> |
static <K,V> Entry<K,V> predecessor(Entry<K,V> t) { |
2008 |
|
if (t == null) |
2009 |
|
return null; |
2010 |
|
else if (t.left != null) { |
2043 |
|
|
2044 |
|
private static <K,V> void setColor(Entry<K,V> p, boolean c) { |
2045 |
|
if (p != null) |
2046 |
< |
p.color = c; |
2046 |
> |
p.color = c; |
2047 |
|
} |
2048 |
|
|
2049 |
|
private static <K,V> Entry<K,V> leftOf(Entry<K,V> p) { |
2054 |
|
return (p == null) ? null: p.right; |
2055 |
|
} |
2056 |
|
|
2057 |
< |
/** From CLR **/ |
2057 |
> |
/** From CLR */ |
2058 |
|
private void rotateLeft(Entry<K,V> p) { |
2059 |
< |
Entry<K,V> r = p.right; |
2060 |
< |
p.right = r.left; |
2061 |
< |
if (r.left != null) |
2062 |
< |
r.left.parent = p; |
2063 |
< |
r.parent = p.parent; |
2064 |
< |
if (p.parent == null) |
2065 |
< |
root = r; |
2066 |
< |
else if (p.parent.left == p) |
2067 |
< |
p.parent.left = r; |
2068 |
< |
else |
2069 |
< |
p.parent.right = r; |
2070 |
< |
r.left = p; |
2071 |
< |
p.parent = r; |
2059 |
> |
if (p != null) { |
2060 |
> |
Entry<K,V> r = p.right; |
2061 |
> |
p.right = r.left; |
2062 |
> |
if (r.left != null) |
2063 |
> |
r.left.parent = p; |
2064 |
> |
r.parent = p.parent; |
2065 |
> |
if (p.parent == null) |
2066 |
> |
root = r; |
2067 |
> |
else if (p.parent.left == p) |
2068 |
> |
p.parent.left = r; |
2069 |
> |
else |
2070 |
> |
p.parent.right = r; |
2071 |
> |
r.left = p; |
2072 |
> |
p.parent = r; |
2073 |
> |
} |
2074 |
|
} |
2075 |
|
|
2076 |
< |
/** From CLR **/ |
2076 |
> |
/** From CLR */ |
2077 |
|
private void rotateRight(Entry<K,V> p) { |
2078 |
< |
Entry<K,V> l = p.left; |
2079 |
< |
p.left = l.right; |
2080 |
< |
if (l.right != null) l.right.parent = p; |
2081 |
< |
l.parent = p.parent; |
2082 |
< |
if (p.parent == null) |
2083 |
< |
root = l; |
2084 |
< |
else if (p.parent.right == p) |
2085 |
< |
p.parent.right = l; |
2086 |
< |
else p.parent.left = l; |
2087 |
< |
l.right = p; |
2088 |
< |
p.parent = l; |
2078 |
> |
if (p != null) { |
2079 |
> |
Entry<K,V> l = p.left; |
2080 |
> |
p.left = l.right; |
2081 |
> |
if (l.right != null) l.right.parent = p; |
2082 |
> |
l.parent = p.parent; |
2083 |
> |
if (p.parent == null) |
2084 |
> |
root = l; |
2085 |
> |
else if (p.parent.right == p) |
2086 |
> |
p.parent.right = l; |
2087 |
> |
else p.parent.left = l; |
2088 |
> |
l.right = p; |
2089 |
> |
p.parent = l; |
2090 |
> |
} |
2091 |
|
} |
2092 |
|
|
2093 |
< |
|
1738 |
< |
/** From CLR **/ |
2093 |
> |
/** From CLR */ |
2094 |
|
private void fixAfterInsertion(Entry<K,V> x) { |
2095 |
|
x.color = RED; |
2096 |
|
|
2109 |
|
} |
2110 |
|
setColor(parentOf(x), BLACK); |
2111 |
|
setColor(parentOf(parentOf(x)), RED); |
2112 |
< |
if (parentOf(parentOf(x)) != null) |
1758 |
< |
rotateRight(parentOf(parentOf(x))); |
2112 |
> |
rotateRight(parentOf(parentOf(x))); |
2113 |
|
} |
2114 |
|
} else { |
2115 |
|
Entry<K,V> y = leftOf(parentOf(parentOf(x))); |
2123 |
|
x = parentOf(x); |
2124 |
|
rotateRight(x); |
2125 |
|
} |
2126 |
< |
setColor(parentOf(x), BLACK); |
2126 |
> |
setColor(parentOf(x), BLACK); |
2127 |
|
setColor(parentOf(parentOf(x)), RED); |
2128 |
< |
if (parentOf(parentOf(x)) != null) |
1775 |
< |
rotateLeft(parentOf(parentOf(x))); |
2128 |
> |
rotateLeft(parentOf(parentOf(x))); |
2129 |
|
} |
2130 |
|
} |
2131 |
|
} |
2135 |
|
/** |
2136 |
|
* Delete node p, and then rebalance the tree. |
2137 |
|
*/ |
1785 |
– |
|
2138 |
|
private void deleteEntry(Entry<K,V> p) { |
2139 |
< |
decrementSize(); |
2139 |
> |
modCount++; |
2140 |
> |
size--; |
2141 |
|
|
2142 |
|
// If strictly internal, copy successor's element to p and then make p |
2143 |
|
// point to successor. |
2183 |
|
} |
2184 |
|
} |
2185 |
|
|
2186 |
< |
/** From CLR **/ |
2186 |
> |
/** From CLR */ |
2187 |
|
private void fixAfterDeletion(Entry<K,V> x) { |
2188 |
|
while (x != root && colorOf(x) == BLACK) { |
2189 |
|
if (x == leftOf(parentOf(x))) { |
2198 |
|
|
2199 |
|
if (colorOf(leftOf(sib)) == BLACK && |
2200 |
|
colorOf(rightOf(sib)) == BLACK) { |
2201 |
< |
setColor(sib, RED); |
2201 |
> |
setColor(sib, RED); |
2202 |
|
x = parentOf(x); |
2203 |
|
} else { |
2204 |
|
if (colorOf(rightOf(sib)) == BLACK) { |
2225 |
|
|
2226 |
|
if (colorOf(rightOf(sib)) == BLACK && |
2227 |
|
colorOf(leftOf(sib)) == BLACK) { |
2228 |
< |
setColor(sib, RED); |
2228 |
> |
setColor(sib, RED); |
2229 |
|
x = parentOf(x); |
2230 |
|
} else { |
2231 |
|
if (colorOf(leftOf(sib)) == BLACK) { |
2276 |
|
} |
2277 |
|
} |
2278 |
|
|
1926 |
– |
|
1927 |
– |
|
2279 |
|
/** |
2280 |
|
* Reconstitute the <tt>TreeMap</tt> instance from a stream (i.e., |
2281 |
|
* deserialize it). |
2291 |
|
buildFromSorted(size, null, s, null); |
2292 |
|
} |
2293 |
|
|
2294 |
< |
/** Intended to be called only from TreeSet.readObject **/ |
2294 |
> |
/** Intended to be called only from TreeSet.readObject */ |
2295 |
|
void readTreeSet(int size, java.io.ObjectInputStream s, V defaultVal) |
2296 |
|
throws java.io.IOException, ClassNotFoundException { |
2297 |
|
buildFromSorted(size, null, s, defaultVal); |
2298 |
|
} |
2299 |
|
|
2300 |
< |
/** Intended to be called only from TreeSet.addAll **/ |
2300 |
> |
/** Intended to be called only from TreeSet.addAll */ |
2301 |
|
void addAllForTreeSet(SortedSet<? extends K> set, V defaultVal) { |
2302 |
< |
try { |
2303 |
< |
buildFromSorted(set.size(), set.iterator(), null, defaultVal); |
2304 |
< |
} catch (java.io.IOException cannotHappen) { |
2305 |
< |
} catch (ClassNotFoundException cannotHappen) { |
2306 |
< |
} |
2302 |
> |
try { |
2303 |
> |
buildFromSorted(set.size(), set.iterator(), null, defaultVal); |
2304 |
> |
} catch (java.io.IOException cannotHappen) { |
2305 |
> |
} catch (ClassNotFoundException cannotHappen) { |
2306 |
> |
} |
2307 |
|
} |
2308 |
|
|
2309 |
|
|
2337 |
|
* @throws ClassNotFoundException propagated from readObject. |
2338 |
|
* This cannot occur if str is null. |
2339 |
|
*/ |
2340 |
< |
private |
2341 |
< |
void buildFromSorted(int size, Iterator it, |
2342 |
< |
java.io.ObjectInputStream str, |
1992 |
< |
V defaultVal) |
2340 |
> |
private void buildFromSorted(int size, Iterator it, |
2341 |
> |
java.io.ObjectInputStream str, |
2342 |
> |
V defaultVal) |
2343 |
|
throws java.io.IOException, ClassNotFoundException { |
2344 |
|
this.size = size; |
2345 |
< |
root = |
2346 |
< |
buildFromSorted(0, 0, size-1, computeRedLevel(size), |
1997 |
< |
it, str, defaultVal); |
2345 |
> |
root = buildFromSorted(0, 0, size-1, computeRedLevel(size), |
2346 |
> |
it, str, defaultVal); |
2347 |
|
} |
2348 |
|
|
2349 |
|
/** |
2350 |
|
* Recursive "helper method" that does the real work of the |
2351 |
< |
* of the previous method. Identically named parameters have |
2351 |
> |
* previous method. Identically named parameters have |
2352 |
|
* identical definitions. Additional parameters are documented below. |
2353 |
|
* It is assumed that the comparator and size fields of the TreeMap are |
2354 |
|
* already set prior to calling this method. (It ignores both fields.) |
2361 |
|
* Must be equal to computeRedLevel for tree of this size. |
2362 |
|
*/ |
2363 |
|
private final Entry<K,V> buildFromSorted(int level, int lo, int hi, |
2364 |
< |
int redLevel, |
2365 |
< |
Iterator it, |
2366 |
< |
java.io.ObjectInputStream str, |
2367 |
< |
V defaultVal) |
2364 |
> |
int redLevel, |
2365 |
> |
Iterator it, |
2366 |
> |
java.io.ObjectInputStream str, |
2367 |
> |
V defaultVal) |
2368 |
|
throws java.io.IOException, ClassNotFoundException { |
2369 |
|
/* |
2370 |
|
* Strategy: The root is the middlemost element. To get to it, we |
2380 |
|
|
2381 |
|
if (hi < lo) return null; |
2382 |
|
|
2383 |
< |
int mid = (lo + hi) / 2; |
2383 |
> |
int mid = (lo + hi) >>> 1; |
2384 |
|
|
2385 |
|
Entry<K,V> left = null; |
2386 |
|
if (lo < mid) |
2387 |
|
left = buildFromSorted(level+1, lo, mid - 1, redLevel, |
2388 |
< |
it, str, defaultVal); |
2388 |
> |
it, str, defaultVal); |
2389 |
|
|
2390 |
|
// extract key and/or value from iterator or stream |
2391 |
|
K key; |
2417 |
|
|
2418 |
|
if (mid < hi) { |
2419 |
|
Entry<K,V> right = buildFromSorted(level+1, mid+1, hi, redLevel, |
2420 |
< |
it, str, defaultVal); |
2420 |
> |
it, str, defaultVal); |
2421 |
|
middle.right = right; |
2422 |
|
right.parent = middle; |
2423 |
|
} |