@GwtCompatible public abstract class ForwardingSortedMap<K,V> extends ForwardingMap<K,V> implements SortedMap<K,V>
Warning: The methods of ForwardingSortedMap forward
indiscriminately to the methods of the delegate. For example,
overriding ForwardingMap.put(K, V) alone will not change the behavior of ForwardingMap.putAll(java.util.Map<? extends K, ? extends V>), which can lead to unexpected behavior. In this case, you should
override putAll as well, either providing your own implementation, or
delegating to the provided standardPutAll method.
Each of the standard methods, where appropriate, use the
comparator of the map to test equality for both keys and values, unlike
ForwardingMap.
The standard methods and the collection views they return are not
guaranteed to be thread-safe, even when all of the methods that they depend
on are thread-safe.
| Modifier and Type | Class and Description |
|---|---|
protected class |
ForwardingSortedMap.StandardKeySet
A sensible implementation of
SortedMap.keySet() in terms of the methods of
ForwardingSortedMap. |
ForwardingMap.StandardEntrySet, ForwardingMap.StandardValues| Modifier | Constructor and Description |
|---|---|
protected |
ForwardingSortedMap()
Constructor for use by subclasses.
|
| Modifier and Type | Method and Description |
|---|---|
Comparator<? super K> |
comparator() |
protected abstract SortedMap<K,V> |
delegate()
Returns the backing delegate instance that methods are forwarded to.
|
K |
firstKey() |
SortedMap<K,V> |
headMap(K toKey) |
K |
lastKey() |
protected boolean |
standardContainsKey(Object key)
A sensible definition of
ForwardingMap.containsKey(java.lang.Object) in terms of the firstKey() method of tailMap(K). |
protected SortedMap<K,V> |
standardSubMap(K fromKey,
K toKey)
A sensible default implementation of
subMap(Object, Object) in
terms of headMap(Object) and tailMap(Object). |
SortedMap<K,V> |
subMap(K fromKey,
K toKey) |
SortedMap<K,V> |
tailMap(K fromKey) |
clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, putAll, remove, size, standardClear, standardContainsValue, standardEquals, standardHashCode, standardIsEmpty, standardPutAll, standardRemove, standardToString, valuestoStringprotected ForwardingSortedMap()
protected abstract SortedMap<K,V> delegate()
ForwardingObjectForwardingSet.delegate(). Concrete subclasses override this method to supply
the instance being decorated.delegate in class ForwardingMap<K,V>public Comparator<? super K> comparator()
comparator in interface SortedMap<K,V>@Beta protected boolean standardContainsKey(@Nullable Object key)
ForwardingMap.containsKey(java.lang.Object) in terms of the firstKey() method of tailMap(K). If you override tailMap(K),
you may wish to override ForwardingMap.containsKey(java.lang.Object) to forward to this
implementation.standardContainsKey in class ForwardingMap<K,V>@Beta protected SortedMap<K,V> standardSubMap(K fromKey, K toKey)
subMap(Object, Object) in
terms of headMap(Object) and tailMap(Object). In some
situations, you may wish to override subMap(Object, Object) to
forward to this implementation.Copyright © 2010-2015. All Rights Reserved.