@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.
default
method warning: This class does not forward calls to default
methods. Instead, it inherits their default implementations. When those implementations
invoke methods, they invoke methods on the ForwardingSortedMap
.
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, values
toString
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
clear, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, equals, forEach, get, getOrDefault, hashCode, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, replaceAll, size
protected ForwardingSortedMap()
protected abstract SortedMap<K,V> delegate()
ForwardingObject
ForwardingSet.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(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 © 2010–2019. All rights reserved.