ForwardingNavigableMap (Guava: Google Core Libraries for Java 19.0 API)

java.lang.Object
- com.google.common.collect.ForwardingObject
- - com.google.common.collect.ForwardingMap<K,V>
  - - com.google.common.collect.ForwardingSortedMap<K,V>
    - - com.google.common.collect.ForwardingNavigableMap<K,V>

All Implemented Interfaces:

Map<K,V>, NavigableMap<K,V>, SortedMap<K,V>
```
public abstract class ForwardingNavigableMap<K,V>
extends ForwardingSortedMap<K,V>
implements NavigableMap<K,V>
```
A navigable map which forwards all its method calls to another navigable map. Subclasses should override one or more methods to modify the behavior of the backing map as desired per the decorator pattern.
Warning: The methods of ForwardingNavigableMap 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 uses the map's comparator (or the natural ordering of the elements, if there is no comparator) to test element equality. As a result, if the comparator is not consistent with equals, some of the standard implementations may violate the Map contract.
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.

Since:

12.0

Author:

Louis Wasserman

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`protected class`	`ForwardingNavigableMap.StandardDescendingMap` A sensible implementation of `NavigableMap.descendingMap()` in terms of the methods of this `NavigableMap`.
`protected class`	`ForwardingNavigableMap.StandardNavigableKeySet` A sensible implementation of `NavigableMap.navigableKeySet()` in terms of the methods of this `NavigableMap`.

Nested classes/interfaces inherited from class com.google.common.collect.ForwardingSortedMap
ForwardingSortedMap.StandardKeySet

Nested classes/interfaces inherited from class com.google.common.collect.ForwardingMap
ForwardingMap.StandardEntrySet, ForwardingMap.StandardValues

Nested classes/interfaces inherited from interface java.util.Map
Map.Entry<K,V>

Constructor Summary

Constructors
Modifier Constructor and Description

protected ForwardingNavigableMap()
Constructor for use by subclasses.

Constructors
Modifier	Constructor and Description
`protected`	`ForwardingNavigableMap()` Constructor for use by subclasses.

Method Summary

Methods
Modifier and Type	Method and Description
`Map.Entry<K,V>`	`ceilingEntry(K key)`
`K`	`ceilingKey(K key)`
`protected abstract NavigableMap<K,V>`	`delegate()` Returns the backing delegate instance that methods are forwarded to.
`NavigableSet<K>`	`descendingKeySet()`
`NavigableMap<K,V>`	`descendingMap()`
`Map.Entry<K,V>`	`firstEntry()`
`Map.Entry<K,V>`	`floorEntry(K key)`
`K`	`floorKey(K key)`
`NavigableMap<K,V>`	`headMap(K toKey, boolean inclusive)`
`Map.Entry<K,V>`	`higherEntry(K key)`
`K`	`higherKey(K key)`
`Map.Entry<K,V>`	`lastEntry()`
`Map.Entry<K,V>`	`lowerEntry(K key)`
`K`	`lowerKey(K key)`
`NavigableSet<K>`	`navigableKeySet()`
`Map.Entry<K,V>`	`pollFirstEntry()`
`Map.Entry<K,V>`	`pollLastEntry()`
`protected Map.Entry<K,V>`	`standardCeilingEntry(K key)` A sensible definition of `ceilingEntry(K)` in terms of the `firstEntry()` of `tailMap(Object, boolean)`.
`protected K`	`standardCeilingKey(K key)` A sensible definition of `ceilingKey(K)` in terms of `ceilingEntry`.
`protected NavigableSet<K>`	`standardDescendingKeySet()` A sensible definition of `descendingKeySet()` as the `navigableKeySet` of `descendingMap()`.
`protected Map.Entry<K,V>`	`standardFirstEntry()` A sensible definition of `firstEntry()` in terms of the `iterator()` of `ForwardingMap.entrySet()`.
`protected K`	`standardFirstKey()` A sensible definition of `ForwardingSortedMap.firstKey()` in terms of `firstEntry`.
`protected Map.Entry<K,V>`	`standardFloorEntry(K key)` A sensible definition of `floorEntry(K)` in terms of the `lastEntry()` of `headMap(Object, boolean)`.
`protected K`	`standardFloorKey(K key)` A sensible definition of `floorKey(K)` in terms of `floorEntry`.
`protected SortedMap<K,V>`	`standardHeadMap(K toKey)` A sensible definition of `ForwardingSortedMap.headMap(Object)` in terms of `headMap(Object, boolean)`.
`protected Map.Entry<K,V>`	`standardHigherEntry(K key)` A sensible definition of `higherEntry(K)` in terms of the `firstEntry()` of `tailMap(Object, boolean)`.
`protected K`	`standardHigherKey(K key)` A sensible definition of `higherKey(K)` in terms of `higherEntry`.
`protected Map.Entry<K,V>`	`standardLastEntry()` A sensible definition of `lastEntry()` in terms of the `iterator()` of the `ForwardingMap.entrySet()` of `descendingMap()`.
`protected K`	`standardLastKey()` A sensible definition of `ForwardingSortedMap.lastKey()` in terms of `lastEntry`.
`protected Map.Entry<K,V>`	`standardLowerEntry(K key)` A sensible definition of `lowerEntry(K)` in terms of the `lastEntry()` of `headMap(Object, boolean)`.
`protected K`	`standardLowerKey(K key)` A sensible definition of `lowerKey(K)` in terms of `lowerEntry`.
`protected Map.Entry<K,V>`	`standardPollFirstEntry()` A sensible definition of `pollFirstEntry()` in terms of the `iterator` of `entrySet`.
`protected Map.Entry<K,V>`	`standardPollLastEntry()` A sensible definition of `pollFirstEntry()` in terms of the `iterator` of the `entrySet` of `descendingMap`.
`protected SortedMap<K,V>`	`standardSubMap(K fromKey, K toKey)` A sensible definition of `ForwardingSortedMap.subMap(Object, Object)` in terms of `subMap(Object, boolean, Object, boolean)`.
`protected SortedMap<K,V>`	`standardTailMap(K fromKey)` A sensible definition of `ForwardingSortedMap.tailMap(Object)` in terms of `tailMap(Object, boolean)`.
`NavigableMap<K,V>`	`subMap(K fromKey, boolean fromInclusive, K toKey, boolean toInclusive)`
`NavigableMap<K,V>`	`tailMap(K fromKey, boolean inclusive)`

Methods inherited from class com.google.common.collect.ForwardingSortedMap
comparator, firstKey, headMap, lastKey, standardContainsKey, subMap, tailMap

Methods inherited from class com.google.common.collect.ForwardingMap
clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, putAll, remove, size, standardClear, standardContainsValue, standardEquals, standardHashCode, standardIsEmpty, standardPutAll, standardRemove, standardToString, values

Methods inherited from class com.google.common.collect.ForwardingObject
toString

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.NavigableMap
headMap, subMap, tailMap

Methods inherited from interface java.util.SortedMap
comparator, entrySet, firstKey, keySet, lastKey, values

Methods inherited from interface java.util.Map
clear, containsKey, containsValue, equals, get, hashCode, isEmpty, put, putAll, remove, size

- Constructor Detail
  - ForwardingNavigableMap
```
protected ForwardingNavigableMap()
```
    Constructor for use by subclasses.
- Method Detail
  - delegate
```
protected abstract NavigableMap<K,V> delegate()
```
    Description copied from class: ForwardingObject
    
    Returns the backing delegate instance that methods are forwarded to. Abstract subclasses generally override this method with an abstract method that has a more specific return type, such as ForwardingSet.delegate(). Concrete subclasses override this method to supply the instance being decorated.
    
    Specified by:
    
    delegate in class ForwardingSortedMap<K,V>
  - lowerEntry
```
public Map.Entry<K,V> lowerEntry(K key)
```
    Specified by:
    
    lowerEntry in interface NavigableMap<K,V>
  - standardLowerEntry
```
protected Map.Entry<K,V> standardLowerEntry(K key)
```
    A sensible definition of lowerEntry(K) in terms of the lastEntry() of headMap(Object, boolean). If you override headMap, you may wish to override lowerEntry to forward to this implementation.
  - lowerKey
```
public K lowerKey(K key)
```
    Specified by:
    
    lowerKey in interface NavigableMap<K,V>
  - standardLowerKey
```
protected K standardLowerKey(K key)
```
    A sensible definition of lowerKey(K) in terms of lowerEntry. If you override lowerEntry(K), you may wish to override lowerKey to forward to this implementation.
  - floorEntry
```
public Map.Entry<K,V> floorEntry(K key)
```
    Specified by:
    
    floorEntry in interface NavigableMap<K,V>
  - standardFloorEntry
```
protected Map.Entry<K,V> standardFloorEntry(K key)
```
    A sensible definition of floorEntry(K) in terms of the lastEntry() of headMap(Object, boolean). If you override headMap, you may wish to override floorEntry to forward to this implementation.
  - floorKey
```
public K floorKey(K key)
```
    Specified by:
    
    floorKey in interface NavigableMap<K,V>
  - standardFloorKey
```
protected K standardFloorKey(K key)
```
    A sensible definition of floorKey(K) in terms of floorEntry. If you override floorEntry, you may wish to override floorKey to forward to this implementation.
  - ceilingEntry
```
public Map.Entry<K,V> ceilingEntry(K key)
```
    Specified by:
    
    ceilingEntry in interface NavigableMap<K,V>
  - standardCeilingEntry
```
protected Map.Entry<K,V> standardCeilingEntry(K key)
```
    A sensible definition of ceilingEntry(K) in terms of the firstEntry() of tailMap(Object, boolean). If you override tailMap, you may wish to override ceilingEntry to forward to this implementation.
  - ceilingKey
```
public K ceilingKey(K key)
```
    Specified by:
    
    ceilingKey in interface NavigableMap<K,V>
  - standardCeilingKey
```
protected K standardCeilingKey(K key)
```
    A sensible definition of ceilingKey(K) in terms of ceilingEntry. If you override ceilingEntry, you may wish to override ceilingKey to forward to this implementation.
  - higherEntry
```
public Map.Entry<K,V> higherEntry(K key)
```
    Specified by:
    
    higherEntry in interface NavigableMap<K,V>
  - standardHigherEntry
```
protected Map.Entry<K,V> standardHigherEntry(K key)
```
    A sensible definition of higherEntry(K) in terms of the firstEntry() of tailMap(Object, boolean). If you override tailMap, you may wish to override higherEntry to forward to this implementation.
  - higherKey
```
public K higherKey(K key)
```
    Specified by:
    
    higherKey in interface NavigableMap<K,V>
  - standardHigherKey
```
protected K standardHigherKey(K key)
```
    A sensible definition of higherKey(K) in terms of higherEntry. If you override higherEntry, you may wish to override higherKey to forward to this implementation.
  - firstEntry
```
public Map.Entry<K,V> firstEntry()
```
    Specified by:
    
    firstEntry in interface NavigableMap<K,V>
  - standardFirstEntry
```
protected Map.Entry<K,V> standardFirstEntry()
```
    A sensible definition of firstEntry() in terms of the iterator() of ForwardingMap.entrySet(). If you override entrySet, you may wish to override firstEntry to forward to this implementation.
  - standardFirstKey
```
protected K standardFirstKey()
```
    A sensible definition of ForwardingSortedMap.firstKey() in terms of firstEntry. If you override firstEntry, you may wish to override firstKey to forward to this implementation.
  - lastEntry
```
public Map.Entry<K,V> lastEntry()
```
    Specified by:
    
    lastEntry in interface NavigableMap<K,V>
  - standardLastEntry
```
protected Map.Entry<K,V> standardLastEntry()
```
    A sensible definition of lastEntry() in terms of the iterator() of the ForwardingMap.entrySet() of descendingMap(). If you override descendingMap, you may wish to override lastEntry to forward to this implementation.
  - standardLastKey
```
protected K standardLastKey()
```
    A sensible definition of ForwardingSortedMap.lastKey() in terms of lastEntry. If you override lastEntry, you may wish to override lastKey to forward to this implementation.
  - pollFirstEntry
```
public Map.Entry<K,V> pollFirstEntry()
```
    Specified by:
    
    pollFirstEntry in interface NavigableMap<K,V>
  - standardPollFirstEntry
```
protected Map.Entry<K,V> standardPollFirstEntry()
```
    A sensible definition of pollFirstEntry() in terms of the iterator of entrySet. If you override entrySet, you may wish to override pollFirstEntry to forward to this implementation.
  - pollLastEntry
```
public Map.Entry<K,V> pollLastEntry()
```
    Specified by:
    
    pollLastEntry in interface NavigableMap<K,V>
  - standardPollLastEntry
```
protected Map.Entry<K,V> standardPollLastEntry()
```
    A sensible definition of pollFirstEntry() in terms of the iterator of the entrySet of descendingMap. If you override descendingMap, you may wish to override pollFirstEntry to forward to this implementation.
  - descendingMap
```
public NavigableMap<K,V> descendingMap()
```
    Specified by:
    
    descendingMap in interface NavigableMap<K,V>
  - navigableKeySet
```
public NavigableSet<K> navigableKeySet()
```
    Specified by:
    
    navigableKeySet in interface NavigableMap<K,V>
  - descendingKeySet
```
public NavigableSet<K> descendingKeySet()
```
    Specified by:
    
    descendingKeySet in interface NavigableMap<K,V>
  - standardDescendingKeySet
```
@Beta
protected NavigableSet<K> standardDescendingKeySet()
```
    A sensible definition of descendingKeySet() as the navigableKeySet of descendingMap(). (The ForwardingNavigableMap.StandardDescendingMap implementation implements navigableKeySet on its own, so as not to cause an infinite loop.) If you override descendingMap, you may wish to override descendingKeySet to forward to this implementation.
  - standardSubMap
```
protected SortedMap<K,V> standardSubMap(K fromKey,
                            K toKey)
```
    A sensible definition of ForwardingSortedMap.subMap(Object, Object) in terms of subMap(Object, boolean, Object, boolean). If you override subMap(K, boolean, K, boolean), you may wish to override subMap to forward to this implementation.
    
    Overrides:
    
    standardSubMap in class ForwardingSortedMap<K,V>
  - subMap
```
public NavigableMap<K,V> subMap(K fromKey,
                       boolean fromInclusive,
                       K toKey,
                       boolean toInclusive)
```
    Specified by:
    
    subMap in interface NavigableMap<K,V>
  - headMap
```
public NavigableMap<K,V> headMap(K toKey,
                        boolean inclusive)
```
    Specified by:
    
    headMap in interface NavigableMap<K,V>
  - tailMap
```
public NavigableMap<K,V> tailMap(K fromKey,
                        boolean inclusive)
```
    Specified by:
    
    tailMap in interface NavigableMap<K,V>
  - standardHeadMap
```
protected SortedMap<K,V> standardHeadMap(K toKey)
```
    A sensible definition of ForwardingSortedMap.headMap(Object) in terms of headMap(Object, boolean). If you override headMap(K, boolean), you may wish to override headMap to forward to this implementation.
  - standardTailMap
```
protected SortedMap<K,V> standardTailMap(K fromKey)
```
    A sensible definition of ForwardingSortedMap.tailMap(Object) in terms of tailMap(Object, boolean). If you override tailMap(K, boolean), you may wish to override tailMap to forward to this implementation.

Class ForwardingNavigableMap<K,V>

Nested Class Summary

Nested classes/interfaces inherited from class com.google.common.collect.ForwardingSortedMap

Nested classes/interfaces inherited from class com.google.common.collect.ForwardingMap

Nested classes/interfaces inherited from interface java.util.Map

Constructor Summary

Method Summary

Methods inherited from class com.google.common.collect.ForwardingSortedMap

Methods inherited from class com.google.common.collect.ForwardingMap

Methods inherited from class com.google.common.collect.ForwardingObject

Methods inherited from class java.lang.Object

Methods inherited from interface java.util.NavigableMap

Methods inherited from interface java.util.SortedMap

Methods inherited from interface java.util.Map

Constructor Detail

ForwardingNavigableMap

Method Detail

delegate

lowerEntry

standardLowerEntry

lowerKey

standardLowerKey

floorEntry

standardFloorEntry

floorKey

standardFloorKey

ceilingEntry

standardCeilingEntry

ceilingKey

standardCeilingKey

higherEntry

standardHigherEntry

higherKey

standardHigherKey

firstEntry

standardFirstEntry

standardFirstKey

lastEntry

standardLastEntry

standardLastKey

pollFirstEntry

standardPollFirstEntry

pollLastEntry

standardPollLastEntry

descendingMap

navigableKeySet

descendingKeySet

standardDescendingKeySet

standardSubMap

subMap

headMap

tailMap

standardHeadMap

standardTailMap