1 |
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/* |
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* %W% %E% |
3 |
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* |
4 |
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* Copyright 2005 Sun Microsystems, Inc. All rights reserved. |
4 |
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* Copyright 2006 Sun Microsystems, Inc. All rights reserved. |
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* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. |
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*/ |
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|
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* <i>is</i> well-defined even if its ordering is inconsistent with equals; it |
31 |
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* just fails to obey the general contract of the <tt>Map</tt> interface. |
32 |
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* |
33 |
< |
* <p><b>Note that this implementation is not synchronized.</b> If multiple |
34 |
< |
* threads access a map concurrently, and at least one of the threads modifies |
35 |
< |
* the map structurally, it <i>must</i> be synchronized externally. (A |
36 |
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* structural modification is any operation that adds or deletes one or more |
37 |
< |
* mappings; merely changing the value associated with an existing key is not |
38 |
< |
* a structural modification.) This is typically accomplished by |
39 |
< |
* synchronizing on some object that naturally encapsulates the map. If no |
40 |
< |
* such object exists, the map should be "wrapped" using the |
41 |
< |
* <tt>Collections.synchronizedMap</tt> method. This is best done at creation |
42 |
< |
* time, to prevent accidental unsynchronized access to the map: |
43 |
< |
* <pre> |
44 |
< |
* Map m = Collections.synchronizedMap(new TreeMap(...)); |
45 |
< |
* </pre> |
33 |
> |
* <p><strong>Note that this implementation is not synchronized.</strong> |
34 |
> |
* If multiple threads access a map concurrently, and at least one of the |
35 |
> |
* threads modifies the map structurally, it <i>must</i> be synchronized |
36 |
> |
* externally. (A structural modification is any operation that adds or |
37 |
> |
* deletes one or more mappings; merely changing the value associated |
38 |
> |
* with an existing key is not a structural modification.) This is |
39 |
> |
* typically accomplished by synchronizing on some object that naturally |
40 |
> |
* encapsulates the map. |
41 |
> |
* If no such object exists, the map should be "wrapped" using the |
42 |
> |
* {@link Collections#synchronizedSortedMap Collections.synchronizedSortedMap} |
43 |
> |
* method. This is best done at creation time, to prevent accidental |
44 |
> |
* unsynchronized access to the map: <pre> |
45 |
> |
* SortedMap m = Collections.synchronizedSortedMap(new TreeMap(...));</pre> |
46 |
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* |
47 |
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* <p>The iterators returned by the <tt>iterator</tt> method of the collections |
48 |
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* returned by all of this class's "collection view methods" are |
68 |
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* associated map using <tt>put</tt>.) |
69 |
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* |
70 |
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* <p>This class is a member of the |
71 |
< |
* <a href="{@docRoot}/../guide/collections/index.html"> |
71 |
> |
* <a href="{@docRoot}/../technotes/guides/collections/index.html"> |
72 |
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* Java Collections Framework</a>. |
73 |
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* |
74 |
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* @param <K> the type of keys maintained by this map |
82 |
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* @see Comparable |
83 |
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* @see Comparator |
84 |
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* @see Collection |
85 |
– |
* @see Collections#synchronizedMap(Map) |
85 |
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* @since 1.2 |
86 |
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*/ |
87 |
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|
95 |
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* |
96 |
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* @serial |
97 |
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*/ |
98 |
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private Comparator<? super K> comparator = null; |
98 |
> |
private final Comparator<? super K> comparator; |
99 |
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|
100 |
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private transient Entry<K,V> root = null; |
101 |
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|
109 |
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*/ |
110 |
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private transient int modCount = 0; |
111 |
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|
113 |
– |
private void incrementSize() { modCount++; size++; } |
114 |
– |
private void decrementSize() { modCount++; size--; } |
115 |
– |
|
112 |
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/** |
113 |
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* Constructs a new, empty tree map, using the natural ordering of its |
114 |
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* keys. All keys inserted into the map must implement the {@link |
122 |
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* <tt>ClassCastException</tt>. |
123 |
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*/ |
124 |
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public TreeMap() { |
125 |
+ |
comparator = null; |
126 |
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} |
127 |
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|
128 |
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/** |
158 |
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* @throws NullPointerException if the specified map is null |
159 |
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*/ |
160 |
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public TreeMap(Map<? extends K, ? extends V> m) { |
161 |
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comparator = null; |
162 |
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putAll(m); |
163 |
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} |
164 |
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|
214 |
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* specified value. More formally, returns <tt>true</tt> if and only if |
215 |
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* this map contains at least one mapping to a value <tt>v</tt> such |
216 |
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* that <tt>(value==null ? v==null : value.equals(v))</tt>. This |
217 |
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* operation requires time linear in the map size. |
217 |
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* operation will probably require time linear in the map size for |
218 |
> |
* most implementations. |
219 |
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* |
220 |
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* @param value value whose presence in this map is to be tested |
221 |
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* @return <tt>true</tt> if a mapping to <tt>value</tt> exists; |
223 |
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* @since 1.2 |
224 |
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*/ |
225 |
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public boolean containsValue(Object value) { |
226 |
< |
return (root==null ? false : |
227 |
< |
(value==null ? valueSearchNull(root) |
228 |
< |
: valueSearchNonNull(root, value))); |
229 |
< |
} |
231 |
< |
|
232 |
< |
private boolean valueSearchNull(Entry n) { |
233 |
< |
if (n.value == null) |
234 |
< |
return true; |
235 |
< |
|
236 |
< |
// Check left and right subtrees for value |
237 |
< |
return (n.left != null && valueSearchNull(n.left)) || |
238 |
< |
(n.right != null && valueSearchNull(n.right)); |
239 |
< |
} |
240 |
< |
|
241 |
< |
private boolean valueSearchNonNull(Entry n, Object value) { |
242 |
< |
// Check this node for the value |
243 |
< |
if (value.equals(n.value)) |
244 |
< |
return true; |
245 |
< |
|
246 |
< |
// Check left and right subtrees for value |
247 |
< |
return (n.left != null && valueSearchNonNull(n.left, value)) || |
248 |
< |
(n.right != null && valueSearchNonNull(n.right, value)); |
226 |
> |
for (Entry<K,V> e = getFirstEntry(); e != null; e = successor(e)) |
227 |
> |
if (valEquals(value, e.value)) |
228 |
> |
return true; |
229 |
> |
return false; |
230 |
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} |
231 |
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|
232 |
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/** |
233 |
< |
* Returns the value to which this map maps the specified key, or |
234 |
< |
* <tt>null</tt> if the map contains no mapping for the key. A return |
235 |
< |
* value of <tt>null</tt> does not <i>necessarily</i> indicate that the |
236 |
< |
* map contains no mapping for the key; it's also possible that the map |
237 |
< |
* explicitly maps the key to <tt>null</tt>. The {@link #containsKey} |
238 |
< |
* operation may be used to distinguish these two cases. |
233 |
> |
* Returns the value to which the specified key is mapped, |
234 |
> |
* or {@code null} if this map contains no mapping for the key. |
235 |
> |
* |
236 |
> |
* <p>More formally, if this map contains a mapping from a key |
237 |
> |
* {@code k} to a value {@code v} such that {@code key} compares |
238 |
> |
* equal to {@code k} according to the map's ordering, then this |
239 |
> |
* method returns {@code v}; otherwise it returns {@code null}. |
240 |
> |
* (There can be at most one such mapping.) |
241 |
> |
* |
242 |
> |
* <p>A return value of {@code null} does not <i>necessarily</i> |
243 |
> |
* indicate that the map contains no mapping for the key; it's also |
244 |
> |
* possible that the map explicitly maps the key to {@code null}. |
245 |
> |
* The {@link #containsKey containsKey} operation may be used to |
246 |
> |
* distinguish these two cases. |
247 |
|
* |
259 |
– |
* @param key key whose associated value is to be returned |
260 |
– |
* @return the value to which this map maps the specified key, or |
261 |
– |
* <tt>null</tt> if the map contains no mapping for the key |
248 |
|
* @throws ClassCastException if the specified key cannot be compared |
249 |
|
* with the keys currently in the map |
250 |
|
* @throws NullPointerException if the specified key is null |
316 |
|
* and this map uses natural ordering, or its comparator |
317 |
|
* does not permit null keys |
318 |
|
*/ |
319 |
< |
private Entry<K,V> getEntry(Object key) { |
319 |
> |
final Entry<K,V> getEntry(Object key) { |
320 |
|
// Offload comparator-based version for sake of performance |
321 |
|
if (comparator != null) |
322 |
|
return getEntryUsingComparator(key); |
323 |
+ |
if (key == null) |
324 |
+ |
throw new NullPointerException(); |
325 |
|
Comparable<? super K> k = (Comparable<? super K>) key; |
326 |
|
Entry<K,V> p = root; |
327 |
|
while (p != null) { |
342 |
|
* that are less dependent on comparator performance, but is |
343 |
|
* worthwhile here.) |
344 |
|
*/ |
345 |
< |
private Entry<K,V> getEntryUsingComparator(Object key) { |
345 |
> |
final Entry<K,V> getEntryUsingComparator(Object key) { |
346 |
|
K k = (K) key; |
347 |
|
Comparator<? super K> cpr = comparator; |
348 |
< |
Entry<K,V> p = root; |
349 |
< |
while (p != null) { |
350 |
< |
int cmp = cpr.compare(k, p.key); |
351 |
< |
if (cmp < 0) |
352 |
< |
p = p.left; |
353 |
< |
else if (cmp > 0) |
354 |
< |
p = p.right; |
355 |
< |
else |
356 |
< |
return p; |
348 |
> |
if (cpr != null) { |
349 |
> |
Entry<K,V> p = root; |
350 |
> |
while (p != null) { |
351 |
> |
int cmp = cpr.compare(k, p.key); |
352 |
> |
if (cmp < 0) |
353 |
> |
p = p.left; |
354 |
> |
else if (cmp > 0) |
355 |
> |
p = p.right; |
356 |
> |
else |
357 |
> |
return p; |
358 |
> |
} |
359 |
|
} |
360 |
|
return null; |
361 |
|
} |
366 |
|
* key; if no such entry exists (i.e., the greatest key in the Tree is less |
367 |
|
* than the specified key), returns <tt>null</tt>. |
368 |
|
*/ |
369 |
< |
private Entry<K,V> getCeilingEntry(K key) { |
369 |
> |
final Entry<K,V> getCeilingEntry(K key) { |
370 |
|
Entry<K,V> p = root; |
371 |
< |
if (p==null) |
382 |
< |
return null; |
383 |
< |
|
384 |
< |
while (true) { |
371 |
> |
while (p != null) { |
372 |
|
int cmp = compare(key, p.key); |
373 |
|
if (cmp < 0) { |
374 |
|
if (p.left != null) |
390 |
|
} else |
391 |
|
return p; |
392 |
|
} |
393 |
+ |
return null; |
394 |
|
} |
395 |
|
|
396 |
|
/** |
398 |
|
* exists, returns the entry for the greatest key less than the specified |
399 |
|
* key; if no such entry exists, returns <tt>null</tt>. |
400 |
|
*/ |
401 |
< |
private Entry<K,V> getFloorEntry(K key) { |
401 |
> |
final Entry<K,V> getFloorEntry(K key) { |
402 |
|
Entry<K,V> p = root; |
403 |
< |
if (p==null) |
416 |
< |
return null; |
417 |
< |
|
418 |
< |
while (true) { |
403 |
> |
while (p != null) { |
404 |
|
int cmp = compare(key, p.key); |
405 |
|
if (cmp > 0) { |
406 |
|
if (p.right != null) |
423 |
|
return p; |
424 |
|
|
425 |
|
} |
426 |
+ |
return null; |
427 |
|
} |
428 |
|
|
429 |
|
/** |
432 |
|
* key greater than the specified key; if no such entry exists |
433 |
|
* returns <tt>null</tt>. |
434 |
|
*/ |
435 |
< |
private Entry<K,V> getHigherEntry(K key) { |
435 |
> |
final Entry<K,V> getHigherEntry(K key) { |
436 |
|
Entry<K,V> p = root; |
437 |
< |
if (p==null) |
452 |
< |
return null; |
453 |
< |
|
454 |
< |
while (true) { |
437 |
> |
while (p != null) { |
438 |
|
int cmp = compare(key, p.key); |
439 |
|
if (cmp < 0) { |
440 |
|
if (p.left != null) |
455 |
|
} |
456 |
|
} |
457 |
|
} |
458 |
+ |
return null; |
459 |
|
} |
460 |
|
|
461 |
|
/** |
463 |
|
* no such entry exists (i.e., the least key in the Tree is greater than |
464 |
|
* the specified key), returns <tt>null</tt>. |
465 |
|
*/ |
466 |
< |
private Entry<K,V> getLowerEntry(K key) { |
466 |
> |
final Entry<K,V> getLowerEntry(K key) { |
467 |
|
Entry<K,V> p = root; |
468 |
< |
if (p==null) |
485 |
< |
return null; |
486 |
< |
|
487 |
< |
while (true) { |
468 |
> |
while (p != null) { |
469 |
|
int cmp = compare(key, p.key); |
470 |
|
if (cmp > 0) { |
471 |
|
if (p.right != null) |
486 |
|
} |
487 |
|
} |
488 |
|
} |
489 |
< |
} |
509 |
< |
|
510 |
< |
/** |
511 |
< |
* Returns the key corresponding to the specified Entry. |
512 |
< |
* @throws NoSuchElementException if the Entry is null |
513 |
< |
*/ |
514 |
< |
private static <K> K key(Entry<K,?> e) { |
515 |
< |
if (e==null) |
516 |
< |
throw new NoSuchElementException(); |
517 |
< |
return e.key; |
489 |
> |
return null; |
490 |
|
} |
491 |
|
|
492 |
|
/** |
493 |
|
* Associates the specified value with the specified key in this map. |
494 |
< |
* If the map previously contained a mapping for this key, the old |
494 |
> |
* If the map previously contained a mapping for the key, the old |
495 |
|
* value is replaced. |
496 |
|
* |
497 |
|
* @param key key with which the specified value is to be associated |
509 |
|
*/ |
510 |
|
public V put(K key, V value) { |
511 |
|
Entry<K,V> t = root; |
540 |
– |
|
512 |
|
if (t == null) { |
513 |
< |
if (key == null) { |
514 |
< |
if (comparator == null) |
515 |
< |
throw new NullPointerException(); |
516 |
< |
comparator.compare(key, key); |
517 |
< |
} |
547 |
< |
incrementSize(); |
513 |
> |
// TBD: |
514 |
> |
// 5045147: (coll) Adding null to an empty TreeSet should |
515 |
> |
// throw NullPointerException |
516 |
> |
// |
517 |
> |
// compare(key, key); // type check |
518 |
|
root = new Entry<K,V>(key, value, null); |
519 |
+ |
size = 1; |
520 |
+ |
modCount++; |
521 |
|
return null; |
522 |
|
} |
523 |
< |
|
524 |
< |
while (true) { |
525 |
< |
int cmp = compare(key, t.key); |
526 |
< |
if (cmp == 0) { |
527 |
< |
return t.setValue(value); |
528 |
< |
} else if (cmp < 0) { |
529 |
< |
if (t.left != null) { |
523 |
> |
int cmp; |
524 |
> |
Entry<K,V> parent; |
525 |
> |
// split comparator and comparable paths |
526 |
> |
Comparator<? super K> cpr = comparator; |
527 |
> |
if (cpr != null) { |
528 |
> |
do { |
529 |
> |
parent = t; |
530 |
> |
cmp = cpr.compare(key, t.key); |
531 |
> |
if (cmp < 0) |
532 |
|
t = t.left; |
533 |
< |
} else { |
560 |
< |
incrementSize(); |
561 |
< |
t.left = new Entry<K,V>(key, value, t); |
562 |
< |
fixAfterInsertion(t.left); |
563 |
< |
return null; |
564 |
< |
} |
565 |
< |
} else { // cmp > 0 |
566 |
< |
if (t.right != null) { |
533 |
> |
else if (cmp > 0) |
534 |
|
t = t.right; |
535 |
< |
} else { |
536 |
< |
incrementSize(); |
537 |
< |
t.right = new Entry<K,V>(key, value, t); |
571 |
< |
fixAfterInsertion(t.right); |
572 |
< |
return null; |
573 |
< |
} |
574 |
< |
} |
535 |
> |
else |
536 |
> |
return t.setValue(value); |
537 |
> |
} while (t != null); |
538 |
|
} |
539 |
+ |
else { |
540 |
+ |
if (key == null) |
541 |
+ |
throw new NullPointerException(); |
542 |
+ |
Comparable<? super K> k = (Comparable<? super K>) key; |
543 |
+ |
do { |
544 |
+ |
parent = t; |
545 |
+ |
cmp = k.compareTo(t.key); |
546 |
+ |
if (cmp < 0) |
547 |
+ |
t = t.left; |
548 |
+ |
else if (cmp > 0) |
549 |
+ |
t = t.right; |
550 |
+ |
else |
551 |
+ |
return t.setValue(value); |
552 |
+ |
} while (t != null); |
553 |
+ |
} |
554 |
+ |
Entry<K,V> e = new Entry<K,V>(key, value, parent); |
555 |
+ |
if (cmp < 0) |
556 |
+ |
parent.left = e; |
557 |
+ |
else |
558 |
+ |
parent.right = e; |
559 |
+ |
fixAfterInsertion(e); |
560 |
+ |
size++; |
561 |
+ |
modCount++; |
562 |
+ |
return null; |
563 |
|
} |
564 |
|
|
565 |
|
/** |
615 |
|
clone.size = 0; |
616 |
|
clone.modCount = 0; |
617 |
|
clone.entrySet = null; |
618 |
< |
clone.descendingEntrySet = null; |
619 |
< |
clone.descendingKeySet = null; |
618 |
> |
clone.navigableKeySet = null; |
619 |
> |
clone.descendingMap = null; |
620 |
|
|
621 |
|
// Initialize clone with our mappings |
622 |
|
try { |
630 |
|
|
631 |
|
// NavigableMap API methods |
632 |
|
|
633 |
+ |
/** |
634 |
+ |
* @since 1.6 |
635 |
+ |
*/ |
636 |
|
public Map.Entry<K,V> firstEntry() { |
637 |
< |
Entry<K,V> e = getFirstEntry(); |
648 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry(e); |
637 |
> |
return exportEntry(getFirstEntry()); |
638 |
|
} |
639 |
|
|
640 |
+ |
/** |
641 |
+ |
* @since 1.6 |
642 |
+ |
*/ |
643 |
|
public Map.Entry<K,V> lastEntry() { |
644 |
< |
Entry<K,V> e = getLastEntry(); |
653 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry(e); |
644 |
> |
return exportEntry(getLastEntry()); |
645 |
|
} |
646 |
|
|
647 |
+ |
/** |
648 |
+ |
* @since 1.6 |
649 |
+ |
*/ |
650 |
|
public Map.Entry<K,V> pollFirstEntry() { |
651 |
|
Entry<K,V> p = getFirstEntry(); |
652 |
< |
if (p == null) |
653 |
< |
return null; |
654 |
< |
Map.Entry result = new AbstractMap.SimpleImmutableEntry(p); |
661 |
< |
deleteEntry(p); |
652 |
> |
Map.Entry<K,V> result = exportEntry(p); |
653 |
> |
if (p != null) |
654 |
> |
deleteEntry(p); |
655 |
|
return result; |
656 |
|
} |
657 |
|
|
658 |
+ |
/** |
659 |
+ |
* @since 1.6 |
660 |
+ |
*/ |
661 |
|
public Map.Entry<K,V> pollLastEntry() { |
662 |
|
Entry<K,V> p = getLastEntry(); |
663 |
< |
if (p == null) |
664 |
< |
return null; |
665 |
< |
Map.Entry result = new AbstractMap.SimpleImmutableEntry(p); |
670 |
< |
deleteEntry(p); |
663 |
> |
Map.Entry<K,V> result = exportEntry(p); |
664 |
> |
if (p != null) |
665 |
> |
deleteEntry(p); |
666 |
|
return result; |
667 |
|
} |
668 |
|
|
671 |
|
* @throws NullPointerException if the specified key is null |
672 |
|
* and this map uses natural ordering, or its comparator |
673 |
|
* does not permit null keys |
674 |
+ |
* @since 1.6 |
675 |
|
*/ |
676 |
|
public Map.Entry<K,V> lowerEntry(K key) { |
677 |
< |
Entry<K,V> e = getLowerEntry(key); |
682 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry(e); |
677 |
> |
return exportEntry(getLowerEntry(key)); |
678 |
|
} |
679 |
|
|
680 |
|
/** |
682 |
|
* @throws NullPointerException if the specified key is null |
683 |
|
* and this map uses natural ordering, or its comparator |
684 |
|
* does not permit null keys |
685 |
+ |
* @since 1.6 |
686 |
|
*/ |
687 |
|
public K lowerKey(K key) { |
688 |
< |
Entry<K,V> e = getLowerEntry(key); |
693 |
< |
return (e == null)? null : e.key; |
688 |
> |
return keyOrNull(getLowerEntry(key)); |
689 |
|
} |
690 |
|
|
691 |
|
/** |
693 |
|
* @throws NullPointerException if the specified key is null |
694 |
|
* and this map uses natural ordering, or its comparator |
695 |
|
* does not permit null keys |
696 |
+ |
* @since 1.6 |
697 |
|
*/ |
698 |
|
public Map.Entry<K,V> floorEntry(K key) { |
699 |
< |
Entry<K,V> e = getFloorEntry(key); |
704 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry(e); |
699 |
> |
return exportEntry(getFloorEntry(key)); |
700 |
|
} |
701 |
|
|
702 |
|
/** |
704 |
|
* @throws NullPointerException if the specified key is null |
705 |
|
* and this map uses natural ordering, or its comparator |
706 |
|
* does not permit null keys |
707 |
+ |
* @since 1.6 |
708 |
|
*/ |
709 |
|
public K floorKey(K key) { |
710 |
< |
Entry<K,V> e = getFloorEntry(key); |
715 |
< |
return (e == null)? null : e.key; |
710 |
> |
return keyOrNull(getFloorEntry(key)); |
711 |
|
} |
712 |
|
|
713 |
|
/** |
715 |
|
* @throws NullPointerException if the specified key is null |
716 |
|
* and this map uses natural ordering, or its comparator |
717 |
|
* does not permit null keys |
718 |
+ |
* @since 1.6 |
719 |
|
*/ |
720 |
|
public Map.Entry<K,V> ceilingEntry(K key) { |
721 |
< |
Entry<K,V> e = getCeilingEntry(key); |
726 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry(e); |
721 |
> |
return exportEntry(getCeilingEntry(key)); |
722 |
|
} |
723 |
|
|
724 |
|
/** |
726 |
|
* @throws NullPointerException if the specified key is null |
727 |
|
* and this map uses natural ordering, or its comparator |
728 |
|
* does not permit null keys |
729 |
+ |
* @since 1.6 |
730 |
|
*/ |
731 |
|
public K ceilingKey(K key) { |
732 |
< |
Entry<K,V> e = getCeilingEntry(key); |
737 |
< |
return (e == null)? null : e.key; |
732 |
> |
return keyOrNull(getCeilingEntry(key)); |
733 |
|
} |
734 |
|
|
735 |
|
/** |
737 |
|
* @throws NullPointerException if the specified key is null |
738 |
|
* and this map uses natural ordering, or its comparator |
739 |
|
* does not permit null keys |
740 |
+ |
* @since 1.6 |
741 |
|
*/ |
742 |
|
public Map.Entry<K,V> higherEntry(K key) { |
743 |
< |
Entry<K,V> e = getHigherEntry(key); |
748 |
< |
return (e == null)? null : new AbstractMap.SimpleImmutableEntry(e); |
743 |
> |
return exportEntry(getHigherEntry(key)); |
744 |
|
} |
745 |
|
|
746 |
|
/** |
748 |
|
* @throws NullPointerException if the specified key is null |
749 |
|
* and this map uses natural ordering, or its comparator |
750 |
|
* does not permit null keys |
751 |
+ |
* @since 1.6 |
752 |
|
*/ |
753 |
|
public K higherKey(K key) { |
754 |
< |
Entry<K,V> e = getHigherEntry(key); |
759 |
< |
return (e == null)? null : e.key; |
754 |
> |
return keyOrNull(getHigherEntry(key)); |
755 |
|
} |
756 |
|
|
757 |
|
// Views |
761 |
|
* the first time this view is requested. Views are stateless, so |
762 |
|
* there's no reason to create more than one. |
763 |
|
*/ |
764 |
< |
private transient Set<Map.Entry<K,V>> entrySet = null; |
765 |
< |
private transient Set<Map.Entry<K,V>> descendingEntrySet = null; |
766 |
< |
private transient Set<K> descendingKeySet = null; |
764 |
> |
private transient EntrySet entrySet = null; |
765 |
> |
private transient KeySet<K> navigableKeySet = null; |
766 |
> |
private transient NavigableMap<K,V> descendingMap = null; |
767 |
|
|
768 |
|
/** |
769 |
|
* Returns a {@link Set} view of the keys contained in this map. |
775 |
|
* the iteration are undefined. The set supports element removal, |
776 |
|
* which removes the corresponding mapping from the map, via the |
777 |
|
* <tt>Iterator.remove</tt>, <tt>Set.remove</tt>, |
778 |
< |
* <tt>removeAll</tt> <tt>retainAll</tt>, and <tt>clear</tt> |
779 |
< |
* operations. It does not support the add or <tt>addAll</tt> |
778 |
> |
* <tt>removeAll</tt>, <tt>retainAll</tt>, and <tt>clear</tt> |
779 |
> |
* operations. It does not support the <tt>add</tt> or <tt>addAll</tt> |
780 |
|
* operations. |
781 |
|
*/ |
782 |
|
public Set<K> keySet() { |
783 |
< |
Set<K> ks = keySet; |
789 |
< |
return (ks != null) ? ks : (keySet = new KeySet()); |
783 |
> |
return navigableKeySet(); |
784 |
|
} |
785 |
|
|
786 |
< |
class KeySet extends AbstractSet<K> { |
787 |
< |
public Iterator<K> iterator() { |
788 |
< |
return new KeyIterator(getFirstEntry()); |
789 |
< |
} |
790 |
< |
|
791 |
< |
public int size() { |
792 |
< |
return TreeMap.this.size(); |
799 |
< |
} |
800 |
< |
|
801 |
< |
public boolean contains(Object o) { |
802 |
< |
return containsKey(o); |
803 |
< |
} |
804 |
< |
|
805 |
< |
public boolean remove(Object o) { |
806 |
< |
int oldSize = size; |
807 |
< |
TreeMap.this.remove(o); |
808 |
< |
return size != oldSize; |
809 |
< |
} |
786 |
> |
/** |
787 |
> |
* @since 1.6 |
788 |
> |
*/ |
789 |
> |
public NavigableSet<K> navigableKeySet() { |
790 |
> |
KeySet<K> nks = navigableKeySet; |
791 |
> |
return (nks != null) ? nks : (navigableKeySet = new KeySet(this)); |
792 |
> |
} |
793 |
|
|
794 |
< |
public void clear() { |
795 |
< |
TreeMap.this.clear(); |
796 |
< |
} |
794 |
> |
/** |
795 |
> |
* @since 1.6 |
796 |
> |
*/ |
797 |
> |
public NavigableSet<K> descendingKeySet() { |
798 |
> |
return descendingMap().navigableKeySet(); |
799 |
|
} |
800 |
|
|
801 |
|
/** |
811 |
|
* mapping from the map, via the <tt>Iterator.remove</tt>, |
812 |
|
* <tt>Collection.remove</tt>, <tt>removeAll</tt>, |
813 |
|
* <tt>retainAll</tt> and <tt>clear</tt> operations. It does not |
814 |
< |
* support the add or <tt>addAll</tt> operations. |
814 |
> |
* support the <tt>add</tt> or <tt>addAll</tt> operations. |
815 |
|
*/ |
816 |
|
public Collection<V> values() { |
817 |
|
Collection<V> vs = values; |
818 |
|
return (vs != null) ? vs : (values = new Values()); |
819 |
|
} |
820 |
|
|
821 |
+ |
/** |
822 |
+ |
* Returns a {@link Set} view of the mappings contained in this map. |
823 |
+ |
* The set's iterator returns the entries in ascending key order. |
824 |
+ |
* The set is backed by the map, so changes to the map are |
825 |
+ |
* reflected in the set, and vice-versa. If the map is modified |
826 |
+ |
* while an iteration over the set is in progress (except through |
827 |
+ |
* the iterator's own <tt>remove</tt> operation, or through the |
828 |
+ |
* <tt>setValue</tt> operation on a map entry returned by the |
829 |
+ |
* iterator) the results of the iteration are undefined. The set |
830 |
+ |
* supports element removal, which removes the corresponding |
831 |
+ |
* mapping from the map, via the <tt>Iterator.remove</tt>, |
832 |
+ |
* <tt>Set.remove</tt>, <tt>removeAll</tt>, <tt>retainAll</tt> and |
833 |
+ |
* <tt>clear</tt> operations. It does not support the |
834 |
+ |
* <tt>add</tt> or <tt>addAll</tt> operations. |
835 |
+ |
*/ |
836 |
+ |
public Set<Map.Entry<K,V>> entrySet() { |
837 |
+ |
EntrySet es = entrySet; |
838 |
+ |
return (es != null) ? es : (entrySet = new EntrySet()); |
839 |
+ |
} |
840 |
+ |
|
841 |
+ |
/** |
842 |
+ |
* @since 1.6 |
843 |
+ |
*/ |
844 |
+ |
public NavigableMap<K, V> descendingMap() { |
845 |
+ |
NavigableMap<K, V> km = descendingMap; |
846 |
+ |
return (km != null) ? km : |
847 |
+ |
(descendingMap = new DescendingSubMap(this, |
848 |
+ |
true, null, true, |
849 |
+ |
true, null, true)); |
850 |
+ |
} |
851 |
+ |
|
852 |
+ |
/** |
853 |
+ |
* @throws ClassCastException {@inheritDoc} |
854 |
+ |
* @throws NullPointerException if <tt>fromKey</tt> or <tt>toKey</tt> is |
855 |
+ |
* null and this map uses natural ordering, or its comparator |
856 |
+ |
* does not permit null keys |
857 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
858 |
+ |
* @since 1.6 |
859 |
+ |
*/ |
860 |
+ |
public NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive, |
861 |
+ |
K toKey, boolean toInclusive) { |
862 |
+ |
return new AscendingSubMap(this, |
863 |
+ |
false, fromKey, fromInclusive, |
864 |
+ |
false, toKey, toInclusive); |
865 |
+ |
} |
866 |
+ |
|
867 |
+ |
/** |
868 |
+ |
* @throws ClassCastException {@inheritDoc} |
869 |
+ |
* @throws NullPointerException if <tt>toKey</tt> is null |
870 |
+ |
* and this map uses natural ordering, or its comparator |
871 |
+ |
* does not permit null keys |
872 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
873 |
+ |
* @since 1.6 |
874 |
+ |
*/ |
875 |
+ |
public NavigableMap<K,V> headMap(K toKey, boolean inclusive) { |
876 |
+ |
return new AscendingSubMap(this, |
877 |
+ |
true, null, true, |
878 |
+ |
false, toKey, inclusive); |
879 |
+ |
} |
880 |
+ |
|
881 |
+ |
/** |
882 |
+ |
* @throws ClassCastException {@inheritDoc} |
883 |
+ |
* @throws NullPointerException if <tt>fromKey</tt> is null |
884 |
+ |
* and this map uses natural ordering, or its comparator |
885 |
+ |
* does not permit null keys |
886 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
887 |
+ |
* @since 1.6 |
888 |
+ |
*/ |
889 |
+ |
public NavigableMap<K,V> tailMap(K fromKey, boolean inclusive) { |
890 |
+ |
return new AscendingSubMap(this, |
891 |
+ |
false, fromKey, inclusive, |
892 |
+ |
true, null, true); |
893 |
+ |
} |
894 |
+ |
|
895 |
+ |
/** |
896 |
+ |
* @throws ClassCastException {@inheritDoc} |
897 |
+ |
* @throws NullPointerException if <tt>fromKey</tt> or <tt>toKey</tt> is |
898 |
+ |
* null and this map uses natural ordering, or its comparator |
899 |
+ |
* does not permit null keys |
900 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
901 |
+ |
*/ |
902 |
+ |
public SortedMap<K,V> subMap(K fromKey, K toKey) { |
903 |
+ |
return subMap(fromKey, true, toKey, false); |
904 |
+ |
} |
905 |
+ |
|
906 |
+ |
/** |
907 |
+ |
* @throws ClassCastException {@inheritDoc} |
908 |
+ |
* @throws NullPointerException if <tt>toKey</tt> is null |
909 |
+ |
* and this map uses natural ordering, or its comparator |
910 |
+ |
* does not permit null keys |
911 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
912 |
+ |
*/ |
913 |
+ |
public SortedMap<K,V> headMap(K toKey) { |
914 |
+ |
return headMap(toKey, false); |
915 |
+ |
} |
916 |
+ |
|
917 |
+ |
/** |
918 |
+ |
* @throws ClassCastException {@inheritDoc} |
919 |
+ |
* @throws NullPointerException if <tt>fromKey</tt> is null |
920 |
+ |
* and this map uses natural ordering, or its comparator |
921 |
+ |
* does not permit null keys |
922 |
+ |
* @throws IllegalArgumentException {@inheritDoc} |
923 |
+ |
*/ |
924 |
+ |
public SortedMap<K,V> tailMap(K fromKey) { |
925 |
+ |
return tailMap(fromKey, true); |
926 |
+ |
} |
927 |
+ |
|
928 |
+ |
// View class support |
929 |
+ |
|
930 |
|
class Values extends AbstractCollection<V> { |
931 |
|
public Iterator<V> iterator() { |
932 |
|
return new ValueIterator(getFirstEntry()); |
937 |
|
} |
938 |
|
|
939 |
|
public boolean contains(Object o) { |
940 |
< |
for (Entry<K,V> e = getFirstEntry(); e != null; e = successor(e)) |
847 |
< |
if (valEquals(e.getValue(), o)) |
848 |
< |
return true; |
849 |
< |
return false; |
940 |
> |
return TreeMap.this.containsValue(o); |
941 |
|
} |
942 |
|
|
943 |
|
public boolean remove(Object o) { |
955 |
|
} |
956 |
|
} |
957 |
|
|
867 |
– |
/** |
868 |
– |
* Returns a {@link Set} view of the mappings contained in this map. |
869 |
– |
* The set's iterator returns the entries in ascending key order. |
870 |
– |
* The set is backed by the map, so changes to the map are |
871 |
– |
* reflected in the set, and vice-versa. If the map is modified |
872 |
– |
* while an iteration over the set is in progress (except through |
873 |
– |
* the iterator's own <tt>remove</tt> operation, or through the |
874 |
– |
* <tt>setValue</tt> operation on a map entry returned by the |
875 |
– |
* iterator) the results of the iteration are undefined. The set |
876 |
– |
* supports element removal, which removes the corresponding |
877 |
– |
* mapping from the map, via the <tt>Iterator.remove</tt>, |
878 |
– |
* <tt>Set.remove</tt>, <tt>removeAll</tt>, <tt>retainAll</tt> and |
879 |
– |
* <tt>clear</tt> operations. It does not support the |
880 |
– |
* <tt>add</tt> or <tt>addAll</tt> operations. |
881 |
– |
*/ |
882 |
– |
public Set<Map.Entry<K,V>> entrySet() { |
883 |
– |
Set<Map.Entry<K,V>> es = entrySet; |
884 |
– |
return (es != null) ? es : (entrySet = new EntrySet()); |
885 |
– |
} |
886 |
– |
|
958 |
|
class EntrySet extends AbstractSet<Map.Entry<K,V>> { |
959 |
|
public Iterator<Map.Entry<K,V>> iterator() { |
960 |
|
return new EntryIterator(getFirstEntry()); |
991 |
|
} |
992 |
|
} |
993 |
|
|
994 |
< |
public Set<Map.Entry<K,V>> descendingEntrySet() { |
995 |
< |
Set<Map.Entry<K,V>> es = descendingEntrySet; |
996 |
< |
return (es != null) ? es : (descendingEntrySet = new DescendingEntrySet()); |
997 |
< |
} |
994 |
> |
/* |
995 |
> |
* Unlike Values and EntrySet, the KeySet class is static, |
996 |
> |
* delegating to a NavigableMap to allow use by SubMaps, which |
997 |
> |
* outweighs the ugliness of needing type-tests for the following |
998 |
> |
* Iterator methods that are defined appropriately in main versus |
999 |
> |
* submap classes. |
1000 |
> |
*/ |
1001 |
|
|
1002 |
< |
class DescendingEntrySet extends EntrySet { |
1003 |
< |
public Iterator<Map.Entry<K,V>> iterator() { |
930 |
< |
return new DescendingEntryIterator(getLastEntry()); |
931 |
< |
} |
1002 |
> |
Iterator<K> keyIterator() { |
1003 |
> |
return new KeyIterator(getFirstEntry()); |
1004 |
|
} |
1005 |
|
|
1006 |
< |
public Set<K> descendingKeySet() { |
1007 |
< |
Set<K> ks = descendingKeySet; |
936 |
< |
return (ks != null) ? ks : (descendingKeySet = new DescendingKeySet()); |
1006 |
> |
Iterator<K> descendingKeyIterator() { |
1007 |
> |
return new DescendingKeyIterator(getFirstEntry()); |
1008 |
|
} |
1009 |
|
|
1010 |
< |
class DescendingKeySet extends KeySet { |
1011 |
< |
public Iterator<K> iterator() { |
1012 |
< |
return new DescendingKeyIterator(getLastEntry()); |
1010 |
> |
static final class KeySet<E> extends AbstractSet<E> implements NavigableSet<E> { |
1011 |
> |
private final NavigableMap<E, Object> m; |
1012 |
> |
KeySet(NavigableMap<E,Object> map) { m = map; } |
1013 |
> |
|
1014 |
> |
public Iterator<E> iterator() { |
1015 |
> |
if (m instanceof TreeMap) |
1016 |
> |
return ((TreeMap<E,Object>)m).keyIterator(); |
1017 |
> |
else |
1018 |
> |
return (Iterator<E>)(((TreeMap.NavigableSubMap)m).keyIterator()); |
1019 |
> |
} |
1020 |
> |
|
1021 |
> |
public Iterator<E> descendingIterator() { |
1022 |
> |
if (m instanceof TreeMap) |
1023 |
> |
return ((TreeMap<E,Object>)m).descendingKeyIterator(); |
1024 |
> |
else |
1025 |
> |
return (Iterator<E>)(((TreeMap.NavigableSubMap)m).descendingKeyIterator()); |
1026 |
> |
} |
1027 |
> |
|
1028 |
> |
public int size() { return m.size(); } |
1029 |
> |
public boolean isEmpty() { return m.isEmpty(); } |
1030 |
> |
public boolean contains(Object o) { return m.containsKey(o); } |
1031 |
> |
public void clear() { m.clear(); } |
1032 |
> |
public E lower(E e) { return m.lowerKey(e); } |
1033 |
> |
public E floor(E e) { return m.floorKey(e); } |
1034 |
> |
public E ceiling(E e) { return m.ceilingKey(e); } |
1035 |
> |
public E higher(E e) { return m.higherKey(e); } |
1036 |
> |
public E first() { return m.firstKey(); } |
1037 |
> |
public E last() { return m.lastKey(); } |
1038 |
> |
public Comparator<? super E> comparator() { return m.comparator(); } |
1039 |
> |
public E pollFirst() { |
1040 |
> |
Map.Entry<E,Object> e = m.pollFirstEntry(); |
1041 |
> |
return e == null? null : e.getKey(); |
1042 |
> |
} |
1043 |
> |
public E pollLast() { |
1044 |
> |
Map.Entry<E,Object> e = m.pollLastEntry(); |
1045 |
> |
return e == null? null : e.getKey(); |
1046 |
> |
} |
1047 |
> |
public boolean remove(Object o) { |
1048 |
> |
int oldSize = size(); |
1049 |
> |
m.remove(o); |
1050 |
> |
return size() != oldSize; |
1051 |
> |
} |
1052 |
> |
public NavigableSet<E> subSet(E fromElement, boolean fromInclusive, |
1053 |
> |
E toElement, boolean toInclusive) { |
1054 |
> |
return new TreeSet<E>(m.subMap(fromElement, fromInclusive, |
1055 |
> |
toElement, toInclusive)); |
1056 |
> |
} |
1057 |
> |
public NavigableSet<E> headSet(E toElement, boolean inclusive) { |
1058 |
> |
return new TreeSet<E>(m.headMap(toElement, inclusive)); |
1059 |
> |
} |
1060 |
> |
public NavigableSet<E> tailSet(E fromElement, boolean inclusive) { |
1061 |
> |
return new TreeSet<E>(m.tailMap(fromElement, inclusive)); |
1062 |
> |
} |
1063 |
> |
public SortedSet<E> subSet(E fromElement, E toElement) { |
1064 |
> |
return subSet(fromElement, true, toElement, false); |
1065 |
> |
} |
1066 |
> |
public SortedSet<E> headSet(E toElement) { |
1067 |
> |
return headSet(toElement, false); |
1068 |
> |
} |
1069 |
> |
public SortedSet<E> tailSet(E fromElement) { |
1070 |
> |
return tailSet(fromElement, true); |
1071 |
> |
} |
1072 |
> |
public NavigableSet<E> descendingSet() { |
1073 |
> |
return new TreeSet(m.descendingMap()); |
1074 |
|
} |
1075 |
|
} |
1076 |
|
|
1077 |
|
/** |
1078 |
< |
* @throws ClassCastException {@inheritDoc} |
947 |
< |
* @throws NullPointerException if <tt>fromKey</tt> or <tt>toKey</tt> is |
948 |
< |
* null and this map uses natural ordering, or its comparator |
949 |
< |
* does not permit null keys |
950 |
< |
* @throws IllegalArgumentException {@inheritDoc} |
1078 |
> |
* Base class for TreeMap Iterators |
1079 |
|
*/ |
1080 |
< |
public NavigableMap<K,V> navigableSubMap(K fromKey, K toKey) { |
1081 |
< |
return new SubMap(fromKey, toKey); |
1080 |
> |
abstract class PrivateEntryIterator<T> implements Iterator<T> { |
1081 |
> |
Entry<K,V> next; |
1082 |
> |
Entry<K,V> lastReturned; |
1083 |
> |
int expectedModCount; |
1084 |
> |
|
1085 |
> |
PrivateEntryIterator(Entry<K,V> first) { |
1086 |
> |
expectedModCount = modCount; |
1087 |
> |
lastReturned = null; |
1088 |
> |
next = first; |
1089 |
> |
} |
1090 |
> |
|
1091 |
> |
public final boolean hasNext() { |
1092 |
> |
return next != null; |
1093 |
> |
} |
1094 |
> |
|
1095 |
> |
final Entry<K,V> nextEntry() { |
1096 |
> |
Entry<K,V> e = lastReturned = next; |
1097 |
> |
if (e == null) |
1098 |
> |
throw new NoSuchElementException(); |
1099 |
> |
if (modCount != expectedModCount) |
1100 |
> |
throw new ConcurrentModificationException(); |
1101 |
> |
next = successor(e); |
1102 |
> |
return e; |
1103 |
> |
} |
1104 |
> |
|
1105 |
> |
final Entry<K,V> prevEntry() { |
1106 |
> |
Entry<K,V> e = lastReturned= next; |
1107 |
> |
if (e == null) |
1108 |
> |
throw new NoSuchElementException(); |
1109 |
> |
if (modCount != expectedModCount) |
1110 |
> |
throw new ConcurrentModificationException(); |
1111 |
> |
next = predecessor(e); |
1112 |
> |
return e; |
1113 |
> |
} |
1114 |
> |
|
1115 |
> |
public void remove() { |
1116 |
> |
if (lastReturned == null) |
1117 |
> |
throw new IllegalStateException(); |
1118 |
> |
if (modCount != expectedModCount) |
1119 |
> |
throw new ConcurrentModificationException(); |
1120 |
> |
// deleted entries are replaced by their successors |
1121 |
> |
if (lastReturned.left != null && lastReturned.right != null) |
1122 |
> |
next = lastReturned; |
1123 |
> |
deleteEntry(lastReturned); |
1124 |
> |
expectedModCount = modCount; |
1125 |
> |
lastReturned = null; |
1126 |
> |
} |
1127 |
> |
} |
1128 |
> |
|
1129 |
> |
final class EntryIterator extends PrivateEntryIterator<Map.Entry<K,V>> { |
1130 |
> |
EntryIterator(Entry<K,V> first) { |
1131 |
> |
super(first); |
1132 |
> |
} |
1133 |
> |
public Map.Entry<K,V> next() { |
1134 |
> |
return nextEntry(); |
1135 |
> |
} |
1136 |
> |
} |
1137 |
> |
|
1138 |
> |
final class ValueIterator extends PrivateEntryIterator<V> { |
1139 |
> |
ValueIterator(Entry<K,V> first) { |
1140 |
> |
super(first); |
1141 |
> |
} |
1142 |
> |
public V next() { |
1143 |
> |
return nextEntry().value; |
1144 |
> |
} |
1145 |
> |
} |
1146 |
> |
|
1147 |
> |
final class KeyIterator extends PrivateEntryIterator<K> { |
1148 |
> |
KeyIterator(Entry<K,V> first) { |
1149 |
> |
super(first); |
1150 |
> |
} |
1151 |
> |
public K next() { |
1152 |
> |
return nextEntry().key; |
1153 |
> |
} |
1154 |
> |
} |
1155 |
> |
|
1156 |
> |
final class DescendingKeyIterator extends PrivateEntryIterator<K> { |
1157 |
> |
DescendingKeyIterator(Entry<K,V> first) { |
1158 |
> |
super(first); |
1159 |
> |
} |
1160 |
> |
public K next() { |
1161 |
> |
return prevEntry().key; |
1162 |
> |
} |
1163 |
|
} |
1164 |
|
|
1165 |
+ |
// Little utilities |
1166 |
+ |
|
1167 |
|
/** |
1168 |
< |
* @throws ClassCastException {@inheritDoc} |
958 |
< |
* @throws NullPointerException if <tt>toKey</tt> is null |
959 |
< |
* and this map uses natural ordering, or its comparator |
960 |
< |
* does not permit null keys |
961 |
< |
* @throws IllegalArgumentException {@inheritDoc} |
1168 |
> |
* Compares two keys using the correct comparison method for this TreeMap. |
1169 |
|
*/ |
1170 |
< |
public NavigableMap<K,V> navigableHeadMap(K toKey) { |
1171 |
< |
return new SubMap(toKey, true); |
1170 |
> |
final int compare(Object k1, Object k2) { |
1171 |
> |
return comparator==null ? ((Comparable<? super K>)k1).compareTo((K)k2) |
1172 |
> |
: comparator.compare((K)k1, (K)k2); |
1173 |
|
} |
1174 |
|
|
1175 |
|
/** |
1176 |
< |
* @throws ClassCastException {@inheritDoc} |
1177 |
< |
* @throws NullPointerException if <tt>fromKey</tt> is null |
970 |
< |
* and this map uses natural ordering, or its comparator |
971 |
< |
* does not permit null keys |
972 |
< |
* @throws IllegalArgumentException {@inheritDoc} |
1176 |
> |
* Test two values for equality. Differs from o1.equals(o2) only in |
1177 |
> |
* that it copes with <tt>null</tt> o1 properly. |
1178 |
|
*/ |
1179 |
< |
public NavigableMap<K,V> navigableTailMap(K fromKey) { |
1180 |
< |
return new SubMap(fromKey, false); |
1179 |
> |
final static boolean valEquals(Object o1, Object o2) { |
1180 |
> |
return (o1==null ? o2==null : o1.equals(o2)); |
1181 |
|
} |
1182 |
|
|
1183 |
|
/** |
1184 |
< |
* Equivalent to {@link #navigableSubMap} but with a return type |
980 |
< |
* conforming to the <tt>SortedMap</tt> interface. |
981 |
< |
* |
982 |
< |
* <p>{@inheritDoc} |
983 |
< |
* |
984 |
< |
* @throws ClassCastException {@inheritDoc} |
985 |
< |
* @throws NullPointerException if <tt>fromKey</tt> or <tt>toKey</tt> is |
986 |
< |
* null and this map uses natural ordering, or its comparator |
987 |
< |
* does not permit null keys |
988 |
< |
* @throws IllegalArgumentException {@inheritDoc} |
1184 |
> |
* Return SimpleImmutableEntry for entry, or null if null |
1185 |
|
*/ |
1186 |
< |
public SortedMap<K,V> subMap(K fromKey, K toKey) { |
1187 |
< |
return new SubMap(fromKey, toKey); |
1186 |
> |
static <K,V> Map.Entry<K,V> exportEntry(TreeMap.Entry<K,V> e) { |
1187 |
> |
return e == null? null : |
1188 |
> |
new AbstractMap.SimpleImmutableEntry<K,V>(e); |
1189 |
|
} |
1190 |
|
|
1191 |
|
/** |
1192 |
< |
* Equivalent to {@link #navigableHeadMap} but with a return type |
996 |
< |
* conforming to the <tt>SortedMap</tt> interface. |
997 |
< |
* |
998 |
< |
* <p>{@inheritDoc} |
999 |
< |
* |
1000 |
< |
* @throws ClassCastException {@inheritDoc} |
1001 |
< |
* @throws NullPointerException if <tt>toKey</tt> is null |
1002 |
< |
* and this map uses natural ordering, or its comparator |
1003 |
< |
* does not permit null keys |
1004 |
< |
* @throws IllegalArgumentException {@inheritDoc} |
1192 |
> |
* Return key for entry, or null if null |
1193 |
|
*/ |
1194 |
< |
public SortedMap<K,V> headMap(K toKey) { |
1195 |
< |
return new SubMap(toKey, true); |
1194 |
> |
static <K,V> K keyOrNull(TreeMap.Entry<K,V> e) { |
1195 |
> |
return e == null? null : e.key; |
1196 |
|
} |
1197 |
|
|
1198 |
|
/** |
1199 |
< |
* Equivalent to {@link #navigableTailMap} but with a return type |
1200 |
< |
* conforming to the <tt>SortedMap</tt> interface. |
1013 |
< |
* |
1014 |
< |
* <p>{@inheritDoc} |
1015 |
< |
* |
1016 |
< |
* @throws ClassCastException {@inheritDoc} |
1017 |
< |
* @throws NullPointerException if <tt>fromKey</tt> is null |
1018 |
< |
* and this map uses natural ordering, or its comparator |
1019 |
< |
* does not permit null keys |
1020 |
< |
* @throws IllegalArgumentException {@inheritDoc} |
1199 |
> |
* Returns the key corresponding to the specified Entry. |
1200 |
> |
* @throws NoSuchElementException if the Entry is null |
1201 |
|
*/ |
1202 |
< |
public SortedMap<K,V> tailMap(K fromKey) { |
1203 |
< |
return new SubMap(fromKey, false); |
1202 |
> |
static <K> K key(Entry<K,?> e) { |
1203 |
> |
if (e==null) |
1204 |
> |
throw new NoSuchElementException(); |
1205 |
> |
return e.key; |
1206 |
|
} |
1207 |
|
|
1208 |
< |
private class SubMap |
1209 |
< |
extends AbstractMap<K,V> |
1210 |
< |
implements NavigableMap<K,V>, java.io.Serializable { |
1211 |
< |
private static final long serialVersionUID = -6520786458950516097L; |
1208 |
> |
|
1209 |
> |
// SubMaps |
1210 |
> |
|
1211 |
> |
/** |
1212 |
> |
* @serial include |
1213 |
> |
*/ |
1214 |
> |
static abstract class NavigableSubMap<K,V> extends AbstractMap<K,V> |
1215 |
> |
implements NavigableMap<K,V>, java.io.Serializable { |
1216 |
> |
/** |
1217 |
> |
* The backing map. |
1218 |
> |
*/ |
1219 |
> |
final TreeMap<K,V> m; |
1220 |
|
|
1221 |
|
/** |
1222 |
< |
* fromKey is significant only if fromStart is false. Similarly, |
1223 |
< |
* toKey is significant only if toStart is false. |
1222 |
> |
* Endpoints are represented as triples (fromStart, lo, |
1223 |
> |
* loInclusive) and (toEnd, hi, hiInclusive). If fromStart is |
1224 |
> |
* true, then the low (absolute) bound is the start of the |
1225 |
> |
* backing map, and the other values are ignored. Otherwise, |
1226 |
> |
* if loInclusive is true, lo is the inclusive bound, else lo |
1227 |
> |
* is the exclusive bound. Similarly for the upper bound. |
1228 |
|
*/ |
1229 |
< |
private boolean fromStart = false, toEnd = false; |
1230 |
< |
private K fromKey, toKey; |
1229 |
> |
final K lo, hi; |
1230 |
> |
final boolean fromStart, toEnd; |
1231 |
> |
final boolean loInclusive, hiInclusive; |
1232 |
> |
|
1233 |
> |
NavigableSubMap(TreeMap<K,V> m, |
1234 |
> |
boolean fromStart, K lo, boolean loInclusive, |
1235 |
> |
boolean toEnd, K hi, boolean hiInclusive) { |
1236 |
> |
if (!fromStart && !toEnd) { |
1237 |
> |
if (m.compare(lo, hi) > 0) |
1238 |
> |
throw new IllegalArgumentException("fromKey > toKey"); |
1239 |
> |
} else { |
1240 |
> |
if (!fromStart) // type check |
1241 |
> |
m.compare(lo, lo); |
1242 |
> |
if (!toEnd) |
1243 |
> |
m.compare(hi, hi); |
1244 |
> |
} |
1245 |
|
|
1246 |
< |
SubMap(K fromKey, K toKey) { |
1247 |
< |
if (compare(fromKey, toKey) > 0) |
1248 |
< |
throw new IllegalArgumentException("fromKey > toKey"); |
1249 |
< |
this.fromKey = fromKey; |
1250 |
< |
this.toKey = toKey; |
1246 |
> |
this.m = m; |
1247 |
> |
this.fromStart = fromStart; |
1248 |
> |
this.lo = lo; |
1249 |
> |
this.loInclusive = loInclusive; |
1250 |
> |
this.toEnd = toEnd; |
1251 |
> |
this.hi = hi; |
1252 |
> |
this.hiInclusive = hiInclusive; |
1253 |
|
} |
1254 |
|
|
1255 |
< |
SubMap(K key, boolean headMap) { |
1256 |
< |
compare(key, key); // Type-check key |
1257 |
< |
|
1258 |
< |
if (headMap) { |
1259 |
< |
fromStart = true; |
1260 |
< |
toKey = key; |
1261 |
< |
} else { |
1052 |
< |
toEnd = true; |
1053 |
< |
fromKey = key; |
1255 |
> |
// internal utilities |
1256 |
> |
|
1257 |
> |
final boolean tooLow(Object key) { |
1258 |
> |
if (!fromStart) { |
1259 |
> |
int c = m.compare(key, lo); |
1260 |
> |
if (c < 0 || (c == 0 && !loInclusive)) |
1261 |
> |
return true; |
1262 |
|
} |
1263 |
+ |
return false; |
1264 |
|
} |
1265 |
|
|
1266 |
< |
SubMap(boolean fromStart, K fromKey, boolean toEnd, K toKey) { |
1267 |
< |
this.fromStart = fromStart; |
1268 |
< |
this.fromKey= fromKey; |
1269 |
< |
this.toEnd = toEnd; |
1270 |
< |
this.toKey = toKey; |
1266 |
> |
final boolean tooHigh(Object key) { |
1267 |
> |
if (!toEnd) { |
1268 |
> |
int c = m.compare(key, hi); |
1269 |
> |
if (c > 0 || (c == 0 && !hiInclusive)) |
1270 |
> |
return true; |
1271 |
> |
} |
1272 |
> |
return false; |
1273 |
> |
} |
1274 |
> |
|
1275 |
> |
final boolean inRange(Object key) { |
1276 |
> |
return !tooLow(key) && !tooHigh(key); |
1277 |
> |
} |
1278 |
> |
|
1279 |
> |
final boolean inClosedRange(Object key) { |
1280 |
> |
return (fromStart || m.compare(key, lo) >= 0) |
1281 |
> |
&& (toEnd || m.compare(hi, key) >= 0); |
1282 |
> |
} |
1283 |
> |
|
1284 |
> |
final boolean inRange(Object key, boolean inclusive) { |
1285 |
> |
return inclusive ? inRange(key) : inClosedRange(key); |
1286 |
> |
} |
1287 |
> |
|
1288 |
> |
/* |
1289 |
> |
* Absolute versions of relation operations. |
1290 |
> |
* Subclasses map to these using like-named "sub" |
1291 |
> |
* versions that invert senses for descending maps |
1292 |
> |
*/ |
1293 |
> |
|
1294 |
> |
final TreeMap.Entry<K,V> absLowest() { |
1295 |
> |
TreeMap.Entry<K,V> e = |
1296 |
> |
(fromStart ? m.getFirstEntry() : |
1297 |
> |
(loInclusive ? m.getCeilingEntry(lo) : |
1298 |
> |
m.getHigherEntry(lo))); |
1299 |
> |
return (e == null || tooHigh(e.key)) ? null : e; |
1300 |
> |
} |
1301 |
> |
|
1302 |
> |
final TreeMap.Entry<K,V> absHighest() { |
1303 |
> |
TreeMap.Entry<K,V> e = |
1304 |
> |
(toEnd ? m.getLastEntry() : |
1305 |
> |
(hiInclusive ? m.getFloorEntry(hi) : |
1306 |
> |
m.getLowerEntry(hi))); |
1307 |
> |
return (e == null || tooLow(e.key)) ? null : e; |
1308 |
> |
} |
1309 |
> |
|
1310 |
> |
final TreeMap.Entry<K,V> absCeiling(K key) { |
1311 |
> |
if (tooLow(key)) |
1312 |
> |
return absLowest(); |
1313 |
> |
TreeMap.Entry<K,V> e = m.getCeilingEntry(key); |
1314 |
> |
return (e == null || tooHigh(e.key)) ? null : e; |
1315 |
> |
} |
1316 |
> |
|
1317 |
> |
final TreeMap.Entry<K,V> absHigher(K key) { |
1318 |
> |
if (tooLow(key)) |
1319 |
> |
return absLowest(); |
1320 |
> |
TreeMap.Entry<K,V> e = m.getHigherEntry(key); |
1321 |
> |
return (e == null || tooHigh(e.key)) ? null : e; |
1322 |
|
} |
1323 |
|
|
1324 |
+ |
final TreeMap.Entry<K,V> absFloor(K key) { |
1325 |
+ |
if (tooHigh(key)) |
1326 |
+ |
return absHighest(); |
1327 |
+ |
TreeMap.Entry<K,V> e = m.getFloorEntry(key); |
1328 |
+ |
return (e == null || tooLow(e.key)) ? null : e; |
1329 |
+ |
} |
1330 |
+ |
|
1331 |
+ |
final TreeMap.Entry<K,V> absLower(K key) { |
1332 |
+ |
if (tooHigh(key)) |
1333 |
+ |
return absHighest(); |
1334 |
+ |
TreeMap.Entry<K,V> e = m.getLowerEntry(key); |
1335 |
+ |
return (e == null || tooLow(e.key)) ? null : e; |
1336 |
+ |
} |
1337 |
+ |
|
1338 |
+ |
/** Returns the absolute high fence for ascending traversal */ |
1339 |
+ |
final TreeMap.Entry<K,V> absHighFence() { |
1340 |
+ |
return (toEnd ? null : (hiInclusive ? |
1341 |
+ |
m.getHigherEntry(hi) : |
1342 |
+ |
m.getCeilingEntry(hi))); |
1343 |
+ |
} |
1344 |
+ |
|
1345 |
+ |
/** Return the absolute low fence for descending traversal */ |
1346 |
+ |
final TreeMap.Entry<K,V> absLowFence() { |
1347 |
+ |
return (fromStart ? null : (loInclusive ? |
1348 |
+ |
m.getLowerEntry(lo) : |
1349 |
+ |
m.getFloorEntry(lo))); |
1350 |
+ |
} |
1351 |
+ |
|
1352 |
+ |
// Abstract methods defined in ascending vs descending classes |
1353 |
+ |
// These relay to the appropriate absolute versions |
1354 |
+ |
|
1355 |
+ |
abstract TreeMap.Entry<K,V> subLowest(); |
1356 |
+ |
abstract TreeMap.Entry<K,V> subHighest(); |
1357 |
+ |
abstract TreeMap.Entry<K,V> subCeiling(K key); |
1358 |
+ |
abstract TreeMap.Entry<K,V> subHigher(K key); |
1359 |
+ |
abstract TreeMap.Entry<K,V> subFloor(K key); |
1360 |
+ |
abstract TreeMap.Entry<K,V> subLower(K key); |
1361 |
+ |
|
1362 |
+ |
/** Returns ascending iterator from the perspective of this submap */ |
1363 |
+ |
abstract Iterator<K> keyIterator(); |
1364 |
+ |
|
1365 |
+ |
/** Returns descending iterator from the perspective of this submap */ |
1366 |
+ |
abstract Iterator<K> descendingKeyIterator(); |
1367 |
+ |
|
1368 |
+ |
// public methods |
1369 |
+ |
|
1370 |
|
public boolean isEmpty() { |
1371 |
< |
return entrySet().isEmpty(); |
1371 |
> |
return (fromStart && toEnd) ? m.isEmpty() : entrySet().isEmpty(); |
1372 |
|
} |
1373 |
|
|
1374 |
< |
public boolean containsKey(Object key) { |
1375 |
< |
return inRange((K) key) && TreeMap.this.containsKey(key); |
1374 |
> |
public int size() { |
1375 |
> |
return (fromStart && toEnd) ? m.size() : entrySet().size(); |
1376 |
|
} |
1377 |
|
|
1378 |
< |
public V get(Object key) { |
1379 |
< |
if (!inRange((K) key)) |
1074 |
< |
return null; |
1075 |
< |
return TreeMap.this.get(key); |
1378 |
> |
public final boolean containsKey(Object key) { |
1379 |
> |
return inRange(key) && m.containsKey(key); |
1380 |
|
} |
1381 |
|
|
1382 |
< |
public V put(K key, V value) { |
1382 |
> |
public final V put(K key, V value) { |
1383 |
|
if (!inRange(key)) |
1384 |
|
throw new IllegalArgumentException("key out of range"); |
1385 |
< |
return TreeMap.this.put(key, value); |
1385 |
> |
return m.put(key, value); |
1386 |
|
} |
1387 |
|
|
1388 |
< |
public V remove(Object key) { |
1389 |
< |
if (!inRange((K) key)) |
1086 |
< |
return null; |
1087 |
< |
return TreeMap.this.remove(key); |
1388 |
> |
public final V get(Object key) { |
1389 |
> |
return !inRange(key)? null : m.get(key); |
1390 |
|
} |
1391 |
|
|
1392 |
< |
public Comparator<? super K> comparator() { |
1393 |
< |
return comparator; |
1392 |
> |
public final V remove(Object key) { |
1393 |
> |
return !inRange(key)? null : m.remove(key); |
1394 |
|
} |
1395 |
|
|
1396 |
< |
public K firstKey() { |
1397 |
< |
TreeMap.Entry<K,V> e = fromStart ? getFirstEntry() : getCeilingEntry(fromKey); |
1096 |
< |
K first = key(e); |
1097 |
< |
if (!toEnd && compare(first, toKey) >= 0) |
1098 |
< |
throw new NoSuchElementException(); |
1099 |
< |
return first; |
1396 |
> |
public final Map.Entry<K,V> ceilingEntry(K key) { |
1397 |
> |
return exportEntry(subCeiling(key)); |
1398 |
|
} |
1399 |
|
|
1400 |
< |
public K lastKey() { |
1401 |
< |
TreeMap.Entry<K,V> e = toEnd ? getLastEntry() : getLowerEntry(toKey); |
1104 |
< |
K last = key(e); |
1105 |
< |
if (!fromStart && compare(last, fromKey) < 0) |
1106 |
< |
throw new NoSuchElementException(); |
1107 |
< |
return last; |
1400 |
> |
public final K ceilingKey(K key) { |
1401 |
> |
return keyOrNull(subCeiling(key)); |
1402 |
|
} |
1403 |
|
|
1404 |
< |
public Map.Entry<K,V> firstEntry() { |
1405 |
< |
TreeMap.Entry<K,V> e = fromStart ? |
1112 |
< |
getFirstEntry() : getCeilingEntry(fromKey); |
1113 |
< |
if (e == null || (!toEnd && compare(e.key, toKey) >= 0)) |
1114 |
< |
return null; |
1115 |
< |
return e; |
1404 |
> |
public final Map.Entry<K,V> higherEntry(K key) { |
1405 |
> |
return exportEntry(subHigher(key)); |
1406 |
|
} |
1407 |
|
|
1408 |
< |
public Map.Entry<K,V> lastEntry() { |
1409 |
< |
TreeMap.Entry<K,V> e = toEnd ? |
1120 |
< |
getLastEntry() : getLowerEntry(toKey); |
1121 |
< |
if (e == null || (!fromStart && compare(e.key, fromKey) < 0)) |
1122 |
< |
return null; |
1123 |
< |
return e; |
1408 |
> |
public final K higherKey(K key) { |
1409 |
> |
return keyOrNull(subHigher(key)); |
1410 |
|
} |
1411 |
|
|
1412 |
< |
public Map.Entry<K,V> pollFirstEntry() { |
1413 |
< |
TreeMap.Entry<K,V> e = fromStart ? |
1128 |
< |
getFirstEntry() : getCeilingEntry(fromKey); |
1129 |
< |
if (e == null || (!toEnd && compare(e.key, toKey) >= 0)) |
1130 |
< |
return null; |
1131 |
< |
Map.Entry result = new AbstractMap.SimpleImmutableEntry(e); |
1132 |
< |
deleteEntry(e); |
1133 |
< |
return result; |
1412 |
> |
public final Map.Entry<K,V> floorEntry(K key) { |
1413 |
> |
return exportEntry(subFloor(key)); |
1414 |
|
} |
1415 |
|
|
1416 |
< |
public Map.Entry<K,V> pollLastEntry() { |
1417 |
< |
TreeMap.Entry<K,V> e = toEnd ? |
1138 |
< |
getLastEntry() : getLowerEntry(toKey); |
1139 |
< |
if (e == null || (!fromStart && compare(e.key, fromKey) < 0)) |
1140 |
< |
return null; |
1141 |
< |
Map.Entry result = new AbstractMap.SimpleImmutableEntry(e); |
1142 |
< |
deleteEntry(e); |
1143 |
< |
return result; |
1416 |
> |
public final K floorKey(K key) { |
1417 |
> |
return keyOrNull(subFloor(key)); |
1418 |
|
} |
1419 |
|
|
1420 |
< |
private TreeMap.Entry<K,V> subceiling(K key) { |
1421 |
< |
TreeMap.Entry<K,V> e = (!fromStart && compare(key, fromKey) < 0)? |
1148 |
< |
getCeilingEntry(fromKey) : getCeilingEntry(key); |
1149 |
< |
if (e == null || (!toEnd && compare(e.key, toKey) >= 0)) |
1150 |
< |
return null; |
1151 |
< |
return e; |
1420 |
> |
public final Map.Entry<K,V> lowerEntry(K key) { |
1421 |
> |
return exportEntry(subLower(key)); |
1422 |
|
} |
1423 |
|
|
1424 |
< |
public Map.Entry<K,V> ceilingEntry(K key) { |
1425 |
< |
TreeMap.Entry<K,V> e = subceiling(key); |
1156 |
< |
return e == null? null : new AbstractMap.SimpleImmutableEntry(e); |
1424 |
> |
public final K lowerKey(K key) { |
1425 |
> |
return keyOrNull(subLower(key)); |
1426 |
|
} |
1427 |
|
|
1428 |
< |
public K ceilingKey(K key) { |
1429 |
< |
TreeMap.Entry<K,V> e = subceiling(key); |
1161 |
< |
return e == null? null : e.key; |
1428 |
> |
public final K firstKey() { |
1429 |
> |
return key(subLowest()); |
1430 |
|
} |
1431 |
|
|
1432 |
< |
|
1433 |
< |
private TreeMap.Entry<K,V> subhigher(K key) { |
1166 |
< |
TreeMap.Entry<K,V> e = (!fromStart && compare(key, fromKey) < 0)? |
1167 |
< |
getCeilingEntry(fromKey) : getHigherEntry(key); |
1168 |
< |
if (e == null || (!toEnd && compare(e.key, toKey) >= 0)) |
1169 |
< |
return null; |
1170 |
< |
return e; |
1432 |
> |
public final K lastKey() { |
1433 |
> |
return key(subHighest()); |
1434 |
|
} |
1435 |
|
|
1436 |
< |
public Map.Entry<K,V> higherEntry(K key) { |
1437 |
< |
TreeMap.Entry<K,V> e = subhigher(key); |
1175 |
< |
return e == null? null : new AbstractMap.SimpleImmutableEntry(e); |
1436 |
> |
public final Map.Entry<K,V> firstEntry() { |
1437 |
> |
return exportEntry(subLowest()); |
1438 |
|
} |
1439 |
|
|
1440 |
< |
public K higherKey(K key) { |
1441 |
< |
TreeMap.Entry<K,V> e = subhigher(key); |
1180 |
< |
return e == null? null : e.key; |
1440 |
> |
public final Map.Entry<K,V> lastEntry() { |
1441 |
> |
return exportEntry(subHighest()); |
1442 |
|
} |
1443 |
|
|
1444 |
< |
private TreeMap.Entry<K,V> subfloor(K key) { |
1445 |
< |
TreeMap.Entry<K,V> e = (!toEnd && compare(key, toKey) >= 0)? |
1446 |
< |
getLowerEntry(toKey) : getFloorEntry(key); |
1447 |
< |
if (e == null || (!fromStart && compare(e.key, fromKey) < 0)) |
1448 |
< |
return null; |
1449 |
< |
return e; |
1444 |
> |
public final Map.Entry<K,V> pollFirstEntry() { |
1445 |
> |
TreeMap.Entry<K,V> e = subLowest(); |
1446 |
> |
Map.Entry<K,V> result = exportEntry(e); |
1447 |
> |
if (e != null) |
1448 |
> |
m.deleteEntry(e); |
1449 |
> |
return result; |
1450 |
|
} |
1451 |
|
|
1452 |
< |
public Map.Entry<K,V> floorEntry(K key) { |
1453 |
< |
TreeMap.Entry<K,V> e = subfloor(key); |
1454 |
< |
return e == null? null : new AbstractMap.SimpleImmutableEntry(e); |
1452 |
> |
public final Map.Entry<K,V> pollLastEntry() { |
1453 |
> |
TreeMap.Entry<K,V> e = subHighest(); |
1454 |
> |
Map.Entry<K,V> result = exportEntry(e); |
1455 |
> |
if (e != null) |
1456 |
> |
m.deleteEntry(e); |
1457 |
> |
return result; |
1458 |
|
} |
1459 |
|
|
1460 |
< |
public K floorKey(K key) { |
1461 |
< |
TreeMap.Entry<K,V> e = subfloor(key); |
1462 |
< |
return e == null? null : e.key; |
1460 |
> |
// Views |
1461 |
> |
transient NavigableMap<K,V> descendingMapView = null; |
1462 |
> |
transient EntrySetView entrySetView = null; |
1463 |
> |
transient KeySet<K> navigableKeySetView = null; |
1464 |
> |
|
1465 |
> |
public final NavigableSet<K> navigableKeySet() { |
1466 |
> |
KeySet<K> nksv = navigableKeySetView; |
1467 |
> |
return (nksv != null) ? nksv : |
1468 |
> |
(navigableKeySetView = new TreeMap.KeySet(this)); |
1469 |
|
} |
1470 |
|
|
1471 |
< |
private TreeMap.Entry<K,V> sublower(K key) { |
1472 |
< |
TreeMap.Entry<K,V> e = (!toEnd && compare(key, toKey) >= 0)? |
1203 |
< |
getLowerEntry(toKey) : getLowerEntry(key); |
1204 |
< |
if (e == null || (!fromStart && compare(e.key, fromKey) < 0)) |
1205 |
< |
return null; |
1206 |
< |
return e; |
1471 |
> |
public final Set<K> keySet() { |
1472 |
> |
return navigableKeySet(); |
1473 |
|
} |
1474 |
|
|
1475 |
< |
public Map.Entry<K,V> lowerEntry(K key) { |
1476 |
< |
TreeMap.Entry<K,V> e = sublower(key); |
1211 |
< |
return e == null? null : new AbstractMap.SimpleImmutableEntry(e); |
1475 |
> |
public NavigableSet<K> descendingKeySet() { |
1476 |
> |
return descendingMap().navigableKeySet(); |
1477 |
|
} |
1478 |
|
|
1479 |
< |
public K lowerKey(K key) { |
1480 |
< |
TreeMap.Entry<K,V> e = sublower(key); |
1216 |
< |
return e == null? null : e.key; |
1479 |
> |
public final SortedMap<K,V> subMap(K fromKey, K toKey) { |
1480 |
> |
return subMap(fromKey, true, toKey, false); |
1481 |
|
} |
1482 |
|
|
1483 |
< |
private transient Set<Map.Entry<K,V>> entrySet = null; |
1483 |
> |
public final SortedMap<K,V> headMap(K toKey) { |
1484 |
> |
return headMap(toKey, false); |
1485 |
> |
} |
1486 |
|
|
1487 |
< |
public Set<Map.Entry<K,V>> entrySet() { |
1488 |
< |
Set<Map.Entry<K,V>> es = entrySet; |
1223 |
< |
return (es != null)? es : (entrySet = new EntrySetView()); |
1487 |
> |
public final SortedMap<K,V> tailMap(K fromKey) { |
1488 |
> |
return tailMap(fromKey, true); |
1489 |
|
} |
1490 |
|
|
1491 |
< |
private class EntrySetView extends AbstractSet<Map.Entry<K,V>> { |
1491 |
> |
// View classes |
1492 |
> |
|
1493 |
> |
abstract class EntrySetView extends AbstractSet<Map.Entry<K,V>> { |
1494 |
|
private transient int size = -1, sizeModCount; |
1495 |
|
|
1496 |
|
public int size() { |
1497 |
< |
if (size == -1 || sizeModCount != TreeMap.this.modCount) { |
1498 |
< |
size = 0; sizeModCount = TreeMap.this.modCount; |
1497 |
> |
if (fromStart && toEnd) |
1498 |
> |
return m.size(); |
1499 |
> |
if (size == -1 || sizeModCount != m.modCount) { |
1500 |
> |
sizeModCount = m.modCount; |
1501 |
> |
size = 0; |
1502 |
|
Iterator i = iterator(); |
1503 |
|
while (i.hasNext()) { |
1504 |
|
size++; |
1509 |
|
} |
1510 |
|
|
1511 |
|
public boolean isEmpty() { |
1512 |
< |
return !iterator().hasNext(); |
1512 |
> |
TreeMap.Entry<K,V> n = absLowest(); |
1513 |
> |
return n == null || tooHigh(n.key); |
1514 |
|
} |
1515 |
|
|
1516 |
|
public boolean contains(Object o) { |
1520 |
|
K key = entry.getKey(); |
1521 |
|
if (!inRange(key)) |
1522 |
|
return false; |
1523 |
< |
TreeMap.Entry node = getEntry(key); |
1523 |
> |
TreeMap.Entry node = m.getEntry(key); |
1524 |
|
return node != null && |
1525 |
< |
valEquals(node.getValue(), entry.getValue()); |
1525 |
> |
valEquals(node.getValue(), entry.getValue()); |
1526 |
|
} |
1527 |
|
|
1528 |
|
public boolean remove(Object o) { |
1532 |
|
K key = entry.getKey(); |
1533 |
|
if (!inRange(key)) |
1534 |
|
return false; |
1535 |
< |
TreeMap.Entry<K,V> node = getEntry(key); |
1535 |
> |
TreeMap.Entry<K,V> node = m.getEntry(key); |
1536 |
|
if (node!=null && valEquals(node.getValue(),entry.getValue())){ |
1537 |
< |
deleteEntry(node); |
1537 |
> |
m.deleteEntry(node); |
1538 |
|
return true; |
1539 |
|
} |
1540 |
|
return false; |
1541 |
|
} |
1271 |
– |
|
1272 |
– |
public Iterator<Map.Entry<K,V>> iterator() { |
1273 |
– |
return new SubMapEntryIterator( |
1274 |
– |
(fromStart ? getFirstEntry() : getCeilingEntry(fromKey)), |
1275 |
– |
(toEnd ? null : getCeilingEntry(toKey))); |
1276 |
– |
} |
1542 |
|
} |
1543 |
|
|
1544 |
< |
private transient Set<Map.Entry<K,V>> descendingEntrySetView = null; |
1545 |
< |
private transient Set<K> descendingKeySetView = null; |
1546 |
< |
|
1547 |
< |
public Set<Map.Entry<K,V>> descendingEntrySet() { |
1548 |
< |
Set<Map.Entry<K,V>> es = descendingEntrySetView; |
1549 |
< |
return (es != null) ? es : |
1550 |
< |
(descendingEntrySetView = new DescendingEntrySetView()); |
1551 |
< |
} |
1287 |
< |
|
1288 |
< |
public Set<K> descendingKeySet() { |
1289 |
< |
Set<K> ks = descendingKeySetView; |
1290 |
< |
return (ks != null) ? ks : |
1291 |
< |
(descendingKeySetView = new DescendingKeySetView()); |
1292 |
< |
} |
1544 |
> |
/** |
1545 |
> |
* Iterators for SubMaps |
1546 |
> |
*/ |
1547 |
> |
abstract class SubMapIterator<T> implements Iterator<T> { |
1548 |
> |
TreeMap.Entry<K,V> lastReturned; |
1549 |
> |
TreeMap.Entry<K,V> next; |
1550 |
> |
final K fenceKey; |
1551 |
> |
int expectedModCount; |
1552 |
|
|
1553 |
< |
private class DescendingEntrySetView extends EntrySetView { |
1554 |
< |
public Iterator<Map.Entry<K,V>> iterator() { |
1555 |
< |
return new DescendingSubMapEntryIterator |
1556 |
< |
((toEnd ? getLastEntry() : getLowerEntry(toKey)), |
1557 |
< |
(fromStart ? null : getLowerEntry(fromKey))); |
1553 |
> |
SubMapIterator(TreeMap.Entry<K,V> first, |
1554 |
> |
TreeMap.Entry<K,V> fence) { |
1555 |
> |
expectedModCount = m.modCount; |
1556 |
> |
lastReturned = null; |
1557 |
> |
next = first; |
1558 |
> |
fenceKey = fence == null ? null : fence.key; |
1559 |
|
} |
1300 |
– |
} |
1560 |
|
|
1561 |
< |
private class DescendingKeySetView extends AbstractSet<K> { |
1562 |
< |
public Iterator<K> iterator() { |
1304 |
< |
return new Iterator<K>() { |
1305 |
< |
private Iterator<Entry<K,V>> i = descendingEntrySet().iterator(); |
1306 |
< |
|
1307 |
< |
public boolean hasNext() { return i.hasNext(); } |
1308 |
< |
public K next() { return i.next().getKey(); } |
1309 |
< |
public void remove() { i.remove(); } |
1310 |
< |
}; |
1561 |
> |
public final boolean hasNext() { |
1562 |
> |
return next != null && next.key != fenceKey; |
1563 |
|
} |
1564 |
|
|
1565 |
< |
public int size() { |
1566 |
< |
return SubMap.this.size(); |
1565 |
> |
final TreeMap.Entry<K,V> nextEntry() { |
1566 |
> |
TreeMap.Entry<K,V> e = lastReturned = next; |
1567 |
> |
if (e == null || e.key == fenceKey) |
1568 |
> |
throw new NoSuchElementException(); |
1569 |
> |
if (m.modCount != expectedModCount) |
1570 |
> |
throw new ConcurrentModificationException(); |
1571 |
> |
next = successor(e); |
1572 |
> |
return e; |
1573 |
|
} |
1574 |
|
|
1575 |
< |
public boolean contains(Object k) { |
1576 |
< |
return SubMap.this.containsKey(k); |
1575 |
> |
final TreeMap.Entry<K,V> prevEntry() { |
1576 |
> |
TreeMap.Entry<K,V> e = lastReturned = next; |
1577 |
> |
if (e == null || e.key == fenceKey) |
1578 |
> |
throw new NoSuchElementException(); |
1579 |
> |
if (m.modCount != expectedModCount) |
1580 |
> |
throw new ConcurrentModificationException(); |
1581 |
> |
next = predecessor(e); |
1582 |
> |
return e; |
1583 |
|
} |
1320 |
– |
} |
1584 |
|
|
1585 |
< |
public NavigableMap<K,V> navigableSubMap(K fromKey, K toKey) { |
1586 |
< |
if (!inRange2(fromKey)) |
1587 |
< |
throw new IllegalArgumentException("fromKey out of range"); |
1588 |
< |
if (!inRange2(toKey)) |
1589 |
< |
throw new IllegalArgumentException("toKey out of range"); |
1590 |
< |
return new SubMap(fromKey, toKey); |
1591 |
< |
} |
1585 |
> |
final void removeAscending() { |
1586 |
> |
if (lastReturned == null) |
1587 |
> |
throw new IllegalStateException(); |
1588 |
> |
if (m.modCount != expectedModCount) |
1589 |
> |
throw new ConcurrentModificationException(); |
1590 |
> |
// deleted entries are replaced by their successors |
1591 |
> |
if (lastReturned.left != null && lastReturned.right != null) |
1592 |
> |
next = lastReturned; |
1593 |
> |
m.deleteEntry(lastReturned); |
1594 |
> |
lastReturned = null; |
1595 |
> |
expectedModCount = m.modCount; |
1596 |
> |
} |
1597 |
|
|
1598 |
< |
public NavigableMap<K,V> navigableHeadMap(K toKey) { |
1599 |
< |
if (!inRange2(toKey)) |
1600 |
< |
throw new IllegalArgumentException("toKey out of range"); |
1601 |
< |
return new SubMap(fromStart, fromKey, false, toKey); |
1602 |
< |
} |
1598 |
> |
final void removeDescending() { |
1599 |
> |
if (lastReturned == null) |
1600 |
> |
throw new IllegalStateException(); |
1601 |
> |
if (m.modCount != expectedModCount) |
1602 |
> |
throw new ConcurrentModificationException(); |
1603 |
> |
m.deleteEntry(lastReturned); |
1604 |
> |
lastReturned = null; |
1605 |
> |
expectedModCount = m.modCount; |
1606 |
> |
} |
1607 |
|
|
1336 |
– |
public NavigableMap<K,V> navigableTailMap(K fromKey) { |
1337 |
– |
if (!inRange2(fromKey)) |
1338 |
– |
throw new IllegalArgumentException("fromKey out of range"); |
1339 |
– |
return new SubMap(false, fromKey, toEnd, toKey); |
1608 |
|
} |
1609 |
|
|
1610 |
< |
public SortedMap<K,V> subMap(K fromKey, K toKey) { |
1611 |
< |
return navigableSubMap(fromKey, toKey); |
1610 |
> |
final class SubMapEntryIterator extends SubMapIterator<Map.Entry<K,V>> { |
1611 |
> |
SubMapEntryIterator(TreeMap.Entry<K,V> first, |
1612 |
> |
TreeMap.Entry<K,V> fence) { |
1613 |
> |
super(first, fence); |
1614 |
> |
} |
1615 |
> |
public Map.Entry<K,V> next() { |
1616 |
> |
return nextEntry(); |
1617 |
> |
} |
1618 |
> |
public void remove() { |
1619 |
> |
removeAscending(); |
1620 |
> |
} |
1621 |
|
} |
1622 |
|
|
1623 |
< |
public SortedMap<K,V> headMap(K toKey) { |
1624 |
< |
return navigableHeadMap(toKey); |
1623 |
> |
final class SubMapKeyIterator extends SubMapIterator<K> { |
1624 |
> |
SubMapKeyIterator(TreeMap.Entry<K,V> first, |
1625 |
> |
TreeMap.Entry<K,V> fence) { |
1626 |
> |
super(first, fence); |
1627 |
> |
} |
1628 |
> |
public K next() { |
1629 |
> |
return nextEntry().key; |
1630 |
> |
} |
1631 |
> |
public void remove() { |
1632 |
> |
removeAscending(); |
1633 |
> |
} |
1634 |
|
} |
1635 |
|
|
1636 |
< |
public SortedMap<K,V> tailMap(K fromKey) { |
1637 |
< |
return navigableTailMap(fromKey); |
1638 |
< |
} |
1636 |
> |
final class DescendingSubMapEntryIterator extends SubMapIterator<Map.Entry<K,V>> { |
1637 |
> |
DescendingSubMapEntryIterator(TreeMap.Entry<K,V> last, |
1638 |
> |
TreeMap.Entry<K,V> fence) { |
1639 |
> |
super(last, fence); |
1640 |
> |
} |
1641 |
|
|
1642 |
< |
private boolean inRange(K key) { |
1643 |
< |
return (fromStart || compare(key, fromKey) >= 0) && |
1644 |
< |
(toEnd || compare(key, toKey) < 0); |
1642 |
> |
public Map.Entry<K,V> next() { |
1643 |
> |
return prevEntry(); |
1644 |
> |
} |
1645 |
> |
public void remove() { |
1646 |
> |
removeDescending(); |
1647 |
> |
} |
1648 |
|
} |
1649 |
|
|
1650 |
< |
// This form allows the high endpoint (as well as all legit keys) |
1651 |
< |
private boolean inRange2(K key) { |
1652 |
< |
return (fromStart || compare(key, fromKey) >= 0) && |
1653 |
< |
(toEnd || compare(key, toKey) <= 0); |
1650 |
> |
final class DescendingSubMapKeyIterator extends SubMapIterator<K> { |
1651 |
> |
DescendingSubMapKeyIterator(TreeMap.Entry<K,V> last, |
1652 |
> |
TreeMap.Entry<K,V> fence) { |
1653 |
> |
super(last, fence); |
1654 |
> |
} |
1655 |
> |
public K next() { |
1656 |
> |
return prevEntry().key; |
1657 |
> |
} |
1658 |
> |
public void remove() { |
1659 |
> |
removeDescending(); |
1660 |
> |
} |
1661 |
|
} |
1662 |
|
} |
1663 |
|
|
1664 |
|
/** |
1665 |
< |
* TreeMap Iterator. |
1665 |
> |
* @serial include |
1666 |
|
*/ |
1667 |
< |
abstract class PrivateEntryIterator<T> implements Iterator<T> { |
1668 |
< |
int expectedModCount = TreeMap.this.modCount; |
1371 |
< |
Entry<K,V> lastReturned = null; |
1372 |
< |
Entry<K,V> next; |
1667 |
> |
static final class AscendingSubMap<K,V> extends NavigableSubMap<K,V> { |
1668 |
> |
private static final long serialVersionUID = 912986545866124060L; |
1669 |
|
|
1670 |
< |
PrivateEntryIterator(Entry<K,V> first) { |
1671 |
< |
next = first; |
1670 |
> |
AscendingSubMap(TreeMap<K,V> m, |
1671 |
> |
boolean fromStart, K lo, boolean loInclusive, |
1672 |
> |
boolean toEnd, K hi, boolean hiInclusive) { |
1673 |
> |
super(m, fromStart, lo, loInclusive, toEnd, hi, hiInclusive); |
1674 |
|
} |
1675 |
|
|
1676 |
< |
public boolean hasNext() { |
1677 |
< |
return next != null; |
1676 |
> |
public Comparator<? super K> comparator() { |
1677 |
> |
return m.comparator(); |
1678 |
|
} |
1679 |
|
|
1680 |
< |
Entry<K,V> nextEntry() { |
1681 |
< |
if (next == null) |
1682 |
< |
throw new NoSuchElementException(); |
1683 |
< |
if (modCount != expectedModCount) |
1684 |
< |
throw new ConcurrentModificationException(); |
1685 |
< |
lastReturned = next; |
1686 |
< |
next = successor(next); |
1687 |
< |
return lastReturned; |
1680 |
> |
public NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive, |
1681 |
> |
K toKey, boolean toInclusive) { |
1682 |
> |
if (!inRange(fromKey, fromInclusive)) |
1683 |
> |
throw new IllegalArgumentException("fromKey out of range"); |
1684 |
> |
if (!inRange(toKey, toInclusive)) |
1685 |
> |
throw new IllegalArgumentException("toKey out of range"); |
1686 |
> |
return new AscendingSubMap(m, |
1687 |
> |
false, fromKey, fromInclusive, |
1688 |
> |
false, toKey, toInclusive); |
1689 |
|
} |
1690 |
|
|
1691 |
< |
public void remove() { |
1692 |
< |
if (lastReturned == null) |
1693 |
< |
throw new IllegalStateException(); |
1694 |
< |
if (modCount != expectedModCount) |
1695 |
< |
throw new ConcurrentModificationException(); |
1696 |
< |
if (lastReturned.left != null && lastReturned.right != null) |
1398 |
< |
next = lastReturned; |
1399 |
< |
deleteEntry(lastReturned); |
1400 |
< |
expectedModCount++; |
1401 |
< |
lastReturned = null; |
1691 |
> |
public NavigableMap<K,V> headMap(K toKey, boolean inclusive) { |
1692 |
> |
if (!inClosedRange(toKey)) |
1693 |
> |
throw new IllegalArgumentException("toKey out of range"); |
1694 |
> |
return new AscendingSubMap(m, |
1695 |
> |
fromStart, lo, loInclusive, |
1696 |
> |
false, toKey, inclusive); |
1697 |
|
} |
1403 |
– |
} |
1698 |
|
|
1699 |
< |
class EntryIterator extends PrivateEntryIterator<Map.Entry<K,V>> { |
1700 |
< |
EntryIterator(Entry<K,V> first) { |
1701 |
< |
super(first); |
1702 |
< |
} |
1703 |
< |
public Map.Entry<K,V> next() { |
1704 |
< |
return nextEntry(); |
1699 |
> |
public NavigableMap<K,V> tailMap(K fromKey, boolean inclusive){ |
1700 |
> |
if (!inRange(fromKey, inclusive)) |
1701 |
> |
throw new IllegalArgumentException("fromKey out of range"); |
1702 |
> |
return new AscendingSubMap(m, |
1703 |
> |
false, fromKey, inclusive, |
1704 |
> |
toEnd, hi, hiInclusive); |
1705 |
|
} |
1412 |
– |
} |
1706 |
|
|
1707 |
< |
class KeyIterator extends PrivateEntryIterator<K> { |
1708 |
< |
KeyIterator(Entry<K,V> first) { |
1709 |
< |
super(first); |
1707 |
> |
public NavigableMap<K,V> descendingMap() { |
1708 |
> |
NavigableMap<K,V> mv = descendingMapView; |
1709 |
> |
return (mv != null) ? mv : |
1710 |
> |
(descendingMapView = |
1711 |
> |
new DescendingSubMap(m, |
1712 |
> |
fromStart, lo, loInclusive, |
1713 |
> |
toEnd, hi, hiInclusive)); |
1714 |
|
} |
1418 |
– |
public K next() { |
1419 |
– |
return nextEntry().key; |
1420 |
– |
} |
1421 |
– |
} |
1715 |
|
|
1716 |
< |
class ValueIterator extends PrivateEntryIterator<V> { |
1717 |
< |
ValueIterator(Entry<K,V> first) { |
1425 |
< |
super(first); |
1426 |
< |
} |
1427 |
< |
public V next() { |
1428 |
< |
return nextEntry().value; |
1716 |
> |
Iterator<K> keyIterator() { |
1717 |
> |
return new SubMapKeyIterator(absLowest(), absHighFence()); |
1718 |
|
} |
1430 |
– |
} |
1431 |
– |
|
1432 |
– |
class SubMapEntryIterator extends PrivateEntryIterator<Map.Entry<K,V>> { |
1433 |
– |
private final K firstExcludedKey; |
1719 |
|
|
1720 |
< |
SubMapEntryIterator(Entry<K,V> first, Entry<K,V> firstExcluded) { |
1721 |
< |
super(first); |
1437 |
< |
firstExcludedKey = (firstExcluded == null |
1438 |
< |
? null |
1439 |
< |
: firstExcluded.key); |
1720 |
> |
Iterator<K> descendingKeyIterator() { |
1721 |
> |
return new DescendingSubMapKeyIterator(absHighest(), absLowFence()); |
1722 |
|
} |
1723 |
|
|
1724 |
< |
public boolean hasNext() { |
1725 |
< |
return next != null && next.key != firstExcludedKey; |
1724 |
> |
final class AscendingEntrySetView extends EntrySetView { |
1725 |
> |
public Iterator<Map.Entry<K,V>> iterator() { |
1726 |
> |
return new SubMapEntryIterator(absLowest(), absHighFence()); |
1727 |
> |
} |
1728 |
|
} |
1729 |
|
|
1730 |
< |
public Map.Entry<K,V> next() { |
1731 |
< |
if (next == null || next.key == firstExcludedKey) |
1732 |
< |
throw new NoSuchElementException(); |
1449 |
< |
return nextEntry(); |
1730 |
> |
public Set<Map.Entry<K,V>> entrySet() { |
1731 |
> |
EntrySetView es = entrySetView; |
1732 |
> |
return (es != null) ? es : new AscendingEntrySetView(); |
1733 |
|
} |
1734 |
+ |
|
1735 |
+ |
TreeMap.Entry<K,V> subLowest() { return absLowest(); } |
1736 |
+ |
TreeMap.Entry<K,V> subHighest() { return absHighest(); } |
1737 |
+ |
TreeMap.Entry<K,V> subCeiling(K key) { return absCeiling(key); } |
1738 |
+ |
TreeMap.Entry<K,V> subHigher(K key) { return absHigher(key); } |
1739 |
+ |
TreeMap.Entry<K,V> subFloor(K key) { return absFloor(key); } |
1740 |
+ |
TreeMap.Entry<K,V> subLower(K key) { return absLower(key); } |
1741 |
|
} |
1742 |
|
|
1743 |
|
/** |
1744 |
< |
* Base for Descending Iterators. |
1744 |
> |
* @serial include |
1745 |
|
*/ |
1746 |
< |
abstract class DescendingPrivateEntryIterator<T> extends PrivateEntryIterator<T> { |
1747 |
< |
DescendingPrivateEntryIterator(Entry<K,V> first) { |
1748 |
< |
super(first); |
1746 |
> |
static final class DescendingSubMap<K,V> extends NavigableSubMap<K,V> { |
1747 |
> |
private static final long serialVersionUID = 912986545866120460L; |
1748 |
> |
DescendingSubMap(TreeMap<K,V> m, |
1749 |
> |
boolean fromStart, K lo, boolean loInclusive, |
1750 |
> |
boolean toEnd, K hi, boolean hiInclusive) { |
1751 |
> |
super(m, fromStart, lo, loInclusive, toEnd, hi, hiInclusive); |
1752 |
|
} |
1753 |
|
|
1754 |
< |
Entry<K,V> nextEntry() { |
1755 |
< |
if (next == null) |
1463 |
< |
throw new NoSuchElementException(); |
1464 |
< |
if (modCount != expectedModCount) |
1465 |
< |
throw new ConcurrentModificationException(); |
1466 |
< |
lastReturned = next; |
1467 |
< |
next = predecessor(next); |
1468 |
< |
return lastReturned; |
1469 |
< |
} |
1470 |
< |
} |
1754 |
> |
private final Comparator<? super K> reverseComparator = |
1755 |
> |
Collections.reverseOrder(m.comparator); |
1756 |
|
|
1757 |
< |
class DescendingEntryIterator extends DescendingPrivateEntryIterator<Map.Entry<K,V>> { |
1758 |
< |
DescendingEntryIterator(Entry<K,V> first) { |
1474 |
< |
super(first); |
1757 |
> |
public Comparator<? super K> comparator() { |
1758 |
> |
return reverseComparator; |
1759 |
|
} |
1760 |
< |
public Map.Entry<K,V> next() { |
1761 |
< |
return nextEntry(); |
1760 |
> |
|
1761 |
> |
public NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive, |
1762 |
> |
K toKey, boolean toInclusive) { |
1763 |
> |
if (!inRange(fromKey, fromInclusive)) |
1764 |
> |
throw new IllegalArgumentException("fromKey out of range"); |
1765 |
> |
if (!inRange(toKey, toInclusive)) |
1766 |
> |
throw new IllegalArgumentException("toKey out of range"); |
1767 |
> |
return new DescendingSubMap(m, |
1768 |
> |
false, toKey, toInclusive, |
1769 |
> |
false, fromKey, fromInclusive); |
1770 |
|
} |
1479 |
– |
} |
1771 |
|
|
1772 |
< |
class DescendingKeyIterator extends DescendingPrivateEntryIterator<K> { |
1773 |
< |
DescendingKeyIterator(Entry<K,V> first) { |
1774 |
< |
super(first); |
1772 |
> |
public NavigableMap<K,V> headMap(K toKey, boolean inclusive) { |
1773 |
> |
if (!inRange(toKey, inclusive)) |
1774 |
> |
throw new IllegalArgumentException("toKey out of range"); |
1775 |
> |
return new DescendingSubMap(m, |
1776 |
> |
false, toKey, inclusive, |
1777 |
> |
toEnd, hi, hiInclusive); |
1778 |
|
} |
1779 |
< |
public K next() { |
1780 |
< |
return nextEntry().key; |
1779 |
> |
|
1780 |
> |
public NavigableMap<K,V> tailMap(K fromKey, boolean inclusive){ |
1781 |
> |
if (!inRange(fromKey, inclusive)) |
1782 |
> |
throw new IllegalArgumentException("fromKey out of range"); |
1783 |
> |
return new DescendingSubMap(m, |
1784 |
> |
fromStart, lo, loInclusive, |
1785 |
> |
false, fromKey, inclusive); |
1786 |
|
} |
1488 |
– |
} |
1787 |
|
|
1788 |
+ |
public NavigableMap<K,V> descendingMap() { |
1789 |
+ |
NavigableMap<K,V> mv = descendingMapView; |
1790 |
+ |
return (mv != null) ? mv : |
1791 |
+ |
(descendingMapView = |
1792 |
+ |
new AscendingSubMap(m, |
1793 |
+ |
fromStart, lo, loInclusive, |
1794 |
+ |
toEnd, hi, hiInclusive)); |
1795 |
+ |
} |
1796 |
|
|
1797 |
< |
class DescendingSubMapEntryIterator extends DescendingPrivateEntryIterator<Map.Entry<K,V>> { |
1798 |
< |
private final K lastExcludedKey; |
1797 |
> |
Iterator<K> keyIterator() { |
1798 |
> |
return new DescendingSubMapKeyIterator(absHighest(), absLowFence()); |
1799 |
> |
} |
1800 |
|
|
1801 |
< |
DescendingSubMapEntryIterator(Entry<K,V> last, Entry<K,V> lastExcluded) { |
1802 |
< |
super(last); |
1496 |
< |
lastExcludedKey = (lastExcluded == null |
1497 |
< |
? null |
1498 |
< |
: lastExcluded.key); |
1801 |
> |
Iterator<K> descendingKeyIterator() { |
1802 |
> |
return new SubMapKeyIterator(absLowest(), absHighFence()); |
1803 |
|
} |
1804 |
|
|
1805 |
< |
public boolean hasNext() { |
1806 |
< |
return next != null && next.key != lastExcludedKey; |
1805 |
> |
final class DescendingEntrySetView extends EntrySetView { |
1806 |
> |
public Iterator<Map.Entry<K,V>> iterator() { |
1807 |
> |
return new DescendingSubMapEntryIterator(absHighest(), absLowFence()); |
1808 |
> |
} |
1809 |
|
} |
1810 |
|
|
1811 |
< |
public Map.Entry<K,V> next() { |
1812 |
< |
if (next == null || next.key == lastExcludedKey) |
1813 |
< |
throw new NoSuchElementException(); |
1508 |
< |
return nextEntry(); |
1811 |
> |
public Set<Map.Entry<K,V>> entrySet() { |
1812 |
> |
EntrySetView es = entrySetView; |
1813 |
> |
return (es != null) ? es : new DescendingEntrySetView(); |
1814 |
|
} |
1815 |
|
|
1816 |
+ |
TreeMap.Entry<K,V> subLowest() { return absHighest(); } |
1817 |
+ |
TreeMap.Entry<K,V> subHighest() { return absLowest(); } |
1818 |
+ |
TreeMap.Entry<K,V> subCeiling(K key) { return absFloor(key); } |
1819 |
+ |
TreeMap.Entry<K,V> subHigher(K key) { return absLower(key); } |
1820 |
+ |
TreeMap.Entry<K,V> subFloor(K key) { return absCeiling(key); } |
1821 |
+ |
TreeMap.Entry<K,V> subLower(K key) { return absHigher(key); } |
1822 |
|
} |
1823 |
|
|
1824 |
|
/** |
1825 |
< |
* Compares two keys using the correct comparison method for this TreeMap. |
1825 |
> |
* This class exists solely for the sake of serialization |
1826 |
> |
* compatibility with previous releases of TreeMap that did not |
1827 |
> |
* support NavigableMap. It translates an old-version SubMap into |
1828 |
> |
* a new-version AscendingSubMap. This class is never otherwise |
1829 |
> |
* used. |
1830 |
> |
* |
1831 |
> |
* @serial include |
1832 |
|
*/ |
1833 |
< |
private int compare(K k1, K k2) { |
1834 |
< |
return comparator==null ? ((Comparable<? super K>)k1).compareTo(k2) |
1835 |
< |
: comparator.compare(k1, k2); |
1833 |
> |
private class SubMap extends AbstractMap<K,V> |
1834 |
> |
implements SortedMap<K,V>, java.io.Serializable { |
1835 |
> |
private static final long serialVersionUID = -6520786458950516097L; |
1836 |
> |
private boolean fromStart = false, toEnd = false; |
1837 |
> |
private K fromKey, toKey; |
1838 |
> |
private Object readResolve() { |
1839 |
> |
return new AscendingSubMap(TreeMap.this, |
1840 |
> |
fromStart, fromKey, true, |
1841 |
> |
toEnd, toKey, false); |
1842 |
> |
} |
1843 |
> |
public Set<Map.Entry<K,V>> entrySet() { throw new InternalError(); } |
1844 |
> |
public K lastKey() { throw new InternalError(); } |
1845 |
> |
public K firstKey() { throw new InternalError(); } |
1846 |
> |
public SortedMap<K,V> subMap(K fromKey, K toKey) { throw new InternalError(); } |
1847 |
> |
public SortedMap<K,V> headMap(K toKey) { throw new InternalError(); } |
1848 |
> |
public SortedMap<K,V> tailMap(K fromKey) { throw new InternalError(); } |
1849 |
> |
public Comparator<? super K> comparator() { throw new InternalError(); } |
1850 |
|
} |
1851 |
|
|
1852 |
< |
/** |
1853 |
< |
* Test two values for equality. Differs from o1.equals(o2) only in |
1523 |
< |
* that it copes with <tt>null</tt> o1 properly. |
1524 |
< |
*/ |
1525 |
< |
private static boolean valEquals(Object o1, Object o2) { |
1526 |
< |
return (o1==null ? o2==null : o1.equals(o2)); |
1527 |
< |
} |
1852 |
> |
|
1853 |
> |
// Red-black mechanics |
1854 |
|
|
1855 |
|
private static final boolean RED = false; |
1856 |
|
private static final boolean BLACK = true; |
1860 |
|
* user (see Map.Entry). |
1861 |
|
*/ |
1862 |
|
|
1863 |
< |
static class Entry<K,V> implements Map.Entry<K,V> { |
1863 |
> |
static final class Entry<K,V> implements Map.Entry<K,V> { |
1864 |
|
K key; |
1865 |
|
V value; |
1866 |
|
Entry<K,V> left = null; |
1912 |
|
public boolean equals(Object o) { |
1913 |
|
if (!(o instanceof Map.Entry)) |
1914 |
|
return false; |
1915 |
< |
Map.Entry e = (Map.Entry)o; |
1915 |
> |
Map.Entry<?,?> e = (Map.Entry<?,?>)o; |
1916 |
|
|
1917 |
|
return valEquals(key,e.getKey()) && valEquals(value,e.getValue()); |
1918 |
|
} |
1932 |
|
* Returns the first Entry in the TreeMap (according to the TreeMap's |
1933 |
|
* key-sort function). Returns null if the TreeMap is empty. |
1934 |
|
*/ |
1935 |
< |
private Entry<K,V> getFirstEntry() { |
1935 |
> |
final Entry<K,V> getFirstEntry() { |
1936 |
|
Entry<K,V> p = root; |
1937 |
|
if (p != null) |
1938 |
|
while (p.left != null) |
1944 |
|
* Returns the last Entry in the TreeMap (according to the TreeMap's |
1945 |
|
* key-sort function). Returns null if the TreeMap is empty. |
1946 |
|
*/ |
1947 |
< |
private Entry<K,V> getLastEntry() { |
1947 |
> |
final Entry<K,V> getLastEntry() { |
1948 |
|
Entry<K,V> p = root; |
1949 |
|
if (p != null) |
1950 |
|
while (p.right != null) |
1955 |
|
/** |
1956 |
|
* Returns the successor of the specified Entry, or null if no such. |
1957 |
|
*/ |
1958 |
< |
private Entry<K,V> successor(Entry<K,V> t) { |
1958 |
> |
static <K,V> TreeMap.Entry<K,V> successor(Entry<K,V> t) { |
1959 |
|
if (t == null) |
1960 |
|
return null; |
1961 |
|
else if (t.right != null) { |
1977 |
|
/** |
1978 |
|
* Returns the predecessor of the specified Entry, or null if no such. |
1979 |
|
*/ |
1980 |
< |
private Entry<K,V> predecessor(Entry<K,V> t) { |
1980 |
> |
static <K,V> Entry<K,V> predecessor(Entry<K,V> t) { |
1981 |
|
if (t == null) |
1982 |
|
return null; |
1983 |
|
else if (t.left != null) { |
2027 |
|
return (p == null) ? null: p.right; |
2028 |
|
} |
2029 |
|
|
2030 |
< |
/** From CLR **/ |
2030 |
> |
/** From CLR */ |
2031 |
|
private void rotateLeft(Entry<K,V> p) { |
2032 |
< |
Entry<K,V> r = p.right; |
2033 |
< |
p.right = r.left; |
2034 |
< |
if (r.left != null) |
2035 |
< |
r.left.parent = p; |
2036 |
< |
r.parent = p.parent; |
2037 |
< |
if (p.parent == null) |
2038 |
< |
root = r; |
2039 |
< |
else if (p.parent.left == p) |
2040 |
< |
p.parent.left = r; |
2041 |
< |
else |
2042 |
< |
p.parent.right = r; |
2043 |
< |
r.left = p; |
2044 |
< |
p.parent = r; |
2032 |
> |
if (p != null) { |
2033 |
> |
Entry<K,V> r = p.right; |
2034 |
> |
p.right = r.left; |
2035 |
> |
if (r.left != null) |
2036 |
> |
r.left.parent = p; |
2037 |
> |
r.parent = p.parent; |
2038 |
> |
if (p.parent == null) |
2039 |
> |
root = r; |
2040 |
> |
else if (p.parent.left == p) |
2041 |
> |
p.parent.left = r; |
2042 |
> |
else |
2043 |
> |
p.parent.right = r; |
2044 |
> |
r.left = p; |
2045 |
> |
p.parent = r; |
2046 |
> |
} |
2047 |
|
} |
2048 |
|
|
2049 |
< |
/** From CLR **/ |
2049 |
> |
/** From CLR */ |
2050 |
|
private void rotateRight(Entry<K,V> p) { |
2051 |
< |
Entry<K,V> l = p.left; |
2052 |
< |
p.left = l.right; |
2053 |
< |
if (l.right != null) l.right.parent = p; |
2054 |
< |
l.parent = p.parent; |
2055 |
< |
if (p.parent == null) |
2056 |
< |
root = l; |
2057 |
< |
else if (p.parent.right == p) |
2058 |
< |
p.parent.right = l; |
2059 |
< |
else p.parent.left = l; |
2060 |
< |
l.right = p; |
2061 |
< |
p.parent = l; |
2051 |
> |
if (p != null) { |
2052 |
> |
Entry<K,V> l = p.left; |
2053 |
> |
p.left = l.right; |
2054 |
> |
if (l.right != null) l.right.parent = p; |
2055 |
> |
l.parent = p.parent; |
2056 |
> |
if (p.parent == null) |
2057 |
> |
root = l; |
2058 |
> |
else if (p.parent.right == p) |
2059 |
> |
p.parent.right = l; |
2060 |
> |
else p.parent.left = l; |
2061 |
> |
l.right = p; |
2062 |
> |
p.parent = l; |
2063 |
> |
} |
2064 |
|
} |
2065 |
|
|
2066 |
< |
|
1737 |
< |
/** From CLR **/ |
2066 |
> |
/** From CLR */ |
2067 |
|
private void fixAfterInsertion(Entry<K,V> x) { |
2068 |
|
x.color = RED; |
2069 |
|
|
2082 |
|
} |
2083 |
|
setColor(parentOf(x), BLACK); |
2084 |
|
setColor(parentOf(parentOf(x)), RED); |
2085 |
< |
if (parentOf(parentOf(x)) != null) |
1757 |
< |
rotateRight(parentOf(parentOf(x))); |
2085 |
> |
rotateRight(parentOf(parentOf(x))); |
2086 |
|
} |
2087 |
|
} else { |
2088 |
|
Entry<K,V> y = leftOf(parentOf(parentOf(x))); |
2096 |
|
x = parentOf(x); |
2097 |
|
rotateRight(x); |
2098 |
|
} |
2099 |
< |
setColor(parentOf(x), BLACK); |
2099 |
> |
setColor(parentOf(x), BLACK); |
2100 |
|
setColor(parentOf(parentOf(x)), RED); |
2101 |
< |
if (parentOf(parentOf(x)) != null) |
1774 |
< |
rotateLeft(parentOf(parentOf(x))); |
2101 |
> |
rotateLeft(parentOf(parentOf(x))); |
2102 |
|
} |
2103 |
|
} |
2104 |
|
} |
2108 |
|
/** |
2109 |
|
* Delete node p, and then rebalance the tree. |
2110 |
|
*/ |
1784 |
– |
|
2111 |
|
private void deleteEntry(Entry<K,V> p) { |
2112 |
< |
decrementSize(); |
2112 |
> |
modCount++; |
2113 |
> |
size--; |
2114 |
|
|
2115 |
|
// If strictly internal, copy successor's element to p and then make p |
2116 |
|
// point to successor. |
2156 |
|
} |
2157 |
|
} |
2158 |
|
|
2159 |
< |
/** From CLR **/ |
2159 |
> |
/** From CLR */ |
2160 |
|
private void fixAfterDeletion(Entry<K,V> x) { |
2161 |
|
while (x != root && colorOf(x) == BLACK) { |
2162 |
|
if (x == leftOf(parentOf(x))) { |
2171 |
|
|
2172 |
|
if (colorOf(leftOf(sib)) == BLACK && |
2173 |
|
colorOf(rightOf(sib)) == BLACK) { |
2174 |
< |
setColor(sib, RED); |
2174 |
> |
setColor(sib, RED); |
2175 |
|
x = parentOf(x); |
2176 |
|
} else { |
2177 |
|
if (colorOf(rightOf(sib)) == BLACK) { |
2198 |
|
|
2199 |
|
if (colorOf(rightOf(sib)) == BLACK && |
2200 |
|
colorOf(leftOf(sib)) == BLACK) { |
2201 |
< |
setColor(sib, RED); |
2201 |
> |
setColor(sib, RED); |
2202 |
|
x = parentOf(x); |
2203 |
|
} else { |
2204 |
|
if (colorOf(leftOf(sib)) == BLACK) { |
2249 |
|
} |
2250 |
|
} |
2251 |
|
|
1925 |
– |
|
1926 |
– |
|
2252 |
|
/** |
2253 |
|
* Reconstitute the <tt>TreeMap</tt> instance from a stream (i.e., |
2254 |
|
* deserialize it). |
2264 |
|
buildFromSorted(size, null, s, null); |
2265 |
|
} |
2266 |
|
|
2267 |
< |
/** Intended to be called only from TreeSet.readObject **/ |
2267 |
> |
/** Intended to be called only from TreeSet.readObject */ |
2268 |
|
void readTreeSet(int size, java.io.ObjectInputStream s, V defaultVal) |
2269 |
|
throws java.io.IOException, ClassNotFoundException { |
2270 |
|
buildFromSorted(size, null, s, defaultVal); |
2271 |
|
} |
2272 |
|
|
2273 |
< |
/** Intended to be called only from TreeSet.addAll **/ |
2273 |
> |
/** Intended to be called only from TreeSet.addAll */ |
2274 |
|
void addAllForTreeSet(SortedSet<? extends K> set, V defaultVal) { |
2275 |
|
try { |
2276 |
|
buildFromSorted(set.size(), set.iterator(), null, defaultVal); |
2310 |
|
* @throws ClassNotFoundException propagated from readObject. |
2311 |
|
* This cannot occur if str is null. |
2312 |
|
*/ |
2313 |
< |
private |
2314 |
< |
void buildFromSorted(int size, Iterator it, |
2315 |
< |
java.io.ObjectInputStream str, |
1991 |
< |
V defaultVal) |
2313 |
> |
private void buildFromSorted(int size, Iterator it, |
2314 |
> |
java.io.ObjectInputStream str, |
2315 |
> |
V defaultVal) |
2316 |
|
throws java.io.IOException, ClassNotFoundException { |
2317 |
|
this.size = size; |
2318 |
< |
root = |
2319 |
< |
buildFromSorted(0, 0, size-1, computeRedLevel(size), |
1996 |
< |
it, str, defaultVal); |
2318 |
> |
root = buildFromSorted(0, 0, size-1, computeRedLevel(size), |
2319 |
> |
it, str, defaultVal); |
2320 |
|
} |
2321 |
|
|
2322 |
|
/** |
2323 |
|
* Recursive "helper method" that does the real work of the |
2324 |
< |
* of the previous method. Identically named parameters have |
2324 |
> |
* previous method. Identically named parameters have |
2325 |
|
* identical definitions. Additional parameters are documented below. |
2326 |
|
* It is assumed that the comparator and size fields of the TreeMap are |
2327 |
|
* already set prior to calling this method. (It ignores both fields.) |