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

java.lang.Object
- com.google.common.collect.ForwardingObject
- - com.google.common.collect.ForwardingCollection<E>
  - - com.google.common.collect.ForwardingSet<E>
    - - com.google.common.collect.ForwardingSortedSet<E>
      - com.google.common.collect.ForwardingNavigableSet<E>

All Implemented Interfaces:

Iterable<E>, Collection<E>, NavigableSet<E>, Set<E>, SortedSet<E>

Direct Known Subclasses:

ForwardingNavigableSet.StandardDescendingSet
```
public abstract class ForwardingNavigableSet<E>
extends ForwardingSortedSet<E>
implements NavigableSet<E>
```
A navigable set which forwards all its method calls to another navigable set. Subclasses should override one or more methods to modify the behavior of the backing set as desired per the decorator pattern.
Warning: The methods of ForwardingNavigableSet forward indiscriminately to the methods of the delegate. For example, overriding ForwardingCollection.add(E) alone will not change the behavior of ForwardingCollection.addAll(java.util.Collection<? extends E>), which can lead to unexpected behavior. In this case, you should override addAll as well, either providing your own implementation, or delegating to the provided standardAddAll method.
Each of the standard methods uses the set'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 Set 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`	`ForwardingNavigableSet.StandardDescendingSet` A sensible implementation of `NavigableSet.descendingSet()` in terms of the other methods of `NavigableSet`, notably including `NavigableSet.descendingIterator()`.

Constructor Summary

Constructors
Modifier Constructor and Description

protected ForwardingNavigableSet()
Constructor for use by subclasses.

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

Method Summary

Methods
Modifier and Type	Method and Description
`E`	`ceiling(E e)`
`protected abstract NavigableSet<E>`	`delegate()` Returns the backing delegate instance that methods are forwarded to.
`Iterator<E>`	`descendingIterator()`
`NavigableSet<E>`	`descendingSet()`
`E`	`floor(E e)`
`NavigableSet<E>`	`headSet(E toElement, boolean inclusive)`
`E`	`higher(E e)`
`E`	`lower(E e)`
`E`	`pollFirst()`
`E`	`pollLast()`
`protected E`	`standardCeiling(E e)` A sensible definition of `ceiling(E)` in terms of the `iterator` method of `tailSet(Object, boolean)`.
`protected E`	`standardFirst()`
`protected E`	`standardFloor(E e)` A sensible definition of `floor(E)` in terms of the `descendingIterator` method of `headSet(Object, boolean)`.
`protected SortedSet<E>`	`standardHeadSet(E toElement)` A sensible definition of `ForwardingSortedSet.headSet(Object)` in terms of the `headSet(Object, boolean)` method.
`protected E`	`standardHigher(E e)` A sensible definition of `higher(E)` in terms of the `iterator` method of `tailSet(Object, boolean)`.
`protected E`	`standardLast()`
`protected E`	`standardLower(E e)` A sensible definition of `lower(E)` in terms of the `descendingIterator` method of `headSet(Object, boolean)`.
`protected E`	`standardPollFirst()` A sensible definition of `pollFirst()` in terms of the `iterator` method.
`protected E`	`standardPollLast()` A sensible definition of `pollLast()` in terms of the `descendingIterator` method.
`protected NavigableSet<E>`	`standardSubSet(E fromElement, boolean fromInclusive, E toElement, boolean toInclusive)` A sensible definition of `subSet(Object, boolean, Object, boolean)` in terms of the `headSet` and `tailSet` methods.
`protected SortedSet<E>`	`standardSubSet(E fromElement, E toElement)` A sensible definition of `ForwardingSortedSet.subSet(Object, Object)` in terms of the `subSet(Object, boolean, Object, boolean)` method.
`protected SortedSet<E>`	`standardTailSet(E fromElement)` A sensible definition of `ForwardingSortedSet.tailSet(Object)` in terms of the `tailSet(Object, boolean)` method.
`NavigableSet<E>`	`subSet(E fromElement, boolean fromInclusive, E toElement, boolean toInclusive)`
`NavigableSet<E>`	`tailSet(E fromElement, boolean inclusive)`

Methods inherited from class com.google.common.collect.ForwardingSortedSet
comparator, first, headSet, last, standardContains, standardRemove, subSet, tailSet

Methods inherited from class com.google.common.collect.ForwardingSet
equals, hashCode, standardEquals, standardHashCode, standardRemoveAll

Methods inherited from class com.google.common.collect.ForwardingCollection
add, addAll, clear, contains, containsAll, isEmpty, iterator, remove, removeAll, retainAll, size, standardAddAll, standardClear, standardContainsAll, standardIsEmpty, standardRetainAll, standardToArray, standardToArray, standardToString, toArray, toArray

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.NavigableSet
headSet, iterator, subSet, tailSet

Methods inherited from interface java.util.SortedSet
comparator, first, last

Methods inherited from interface java.util.Set
add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, remove, removeAll, retainAll, size, toArray, toArray

- Constructor Detail
  - ForwardingNavigableSet
```
protected ForwardingNavigableSet()
```
    Constructor for use by subclasses.
- Method Detail
  - delegate
```
protected abstract NavigableSet<E> 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 ForwardingSortedSet<E>
  - lower
```
public E lower(E e)
```
    Specified by:
    
    lower in interface NavigableSet<E>
  - standardLower
```
protected E standardLower(E e)
```
    A sensible definition of lower(E) in terms of the descendingIterator method of headSet(Object, boolean). If you override headSet(Object, boolean), you may wish to override lower(E) to forward to this implementation.
  - floor
```
public E floor(E e)
```
    Specified by:
    
    floor in interface NavigableSet<E>
  - standardFloor
```
protected E standardFloor(E e)
```
    A sensible definition of floor(E) in terms of the descendingIterator method of headSet(Object, boolean). If you override headSet(Object, boolean), you may wish to override floor(E) to forward to this implementation.
  - ceiling
```
public E ceiling(E e)
```
    Specified by:
    
    ceiling in interface NavigableSet<E>
  - standardCeiling
```
protected E standardCeiling(E e)
```
    A sensible definition of ceiling(E) in terms of the iterator method of tailSet(Object, boolean). If you override tailSet(Object, boolean), you may wish to override ceiling(E) to forward to this implementation.
  - higher
```
public E higher(E e)
```
    Specified by:
    
    higher in interface NavigableSet<E>
  - standardHigher
```
protected E standardHigher(E e)
```
    A sensible definition of higher(E) in terms of the iterator method of tailSet(Object, boolean). If you override tailSet(Object, boolean), you may wish to override higher(E) to forward to this implementation.
  - pollFirst
```
public E pollFirst()
```
    Specified by:
    
    pollFirst in interface NavigableSet<E>
  - standardPollFirst
```
protected E standardPollFirst()
```
    A sensible definition of pollFirst() in terms of the iterator method. If you override ForwardingCollection.iterator() you may wish to override pollFirst() to forward to this implementation.
  - pollLast
```
public E pollLast()
```
    Specified by:
    
    pollLast in interface NavigableSet<E>
  - standardPollLast
```
protected E standardPollLast()
```
    A sensible definition of pollLast() in terms of the descendingIterator method. If you override descendingIterator() you may wish to override pollLast() to forward to this implementation.
  - standardFirst
```
protected E standardFirst()
```
  - standardLast
```
protected E standardLast()
```
  - descendingSet
```
public NavigableSet<E> descendingSet()
```
    Specified by:
    
    descendingSet in interface NavigableSet<E>
  - descendingIterator
```
public Iterator<E> descendingIterator()
```
    Specified by:
    
    descendingIterator in interface NavigableSet<E>
  - subSet
```
public NavigableSet<E> subSet(E fromElement,
                     boolean fromInclusive,
                     E toElement,
                     boolean toInclusive)
```
    Specified by:
    
    subSet in interface NavigableSet<E>
  - standardSubSet
```
@Beta
protected NavigableSet<E> standardSubSet(E fromElement,
                                  boolean fromInclusive,
                                  E toElement,
                                  boolean toInclusive)
```
    A sensible definition of subSet(Object, boolean, Object, boolean) in terms of the headSet and tailSet methods. In many cases, you may wish to override subSet(Object, boolean, Object, boolean) to forward to this implementation.
  - standardSubSet
```
protected SortedSet<E> standardSubSet(E fromElement,
                          E toElement)
```
    A sensible definition of ForwardingSortedSet.subSet(Object, Object) in terms of the subSet(Object, boolean, Object, boolean) method. If you override subSet(Object, boolean, Object, boolean), you may wish to override ForwardingSortedSet.subSet(Object, Object) to forward to this implementation.
    
    Overrides:
    
    standardSubSet in class ForwardingSortedSet<E>
  - headSet
```
public NavigableSet<E> headSet(E toElement,
                      boolean inclusive)
```
    Specified by:
    
    headSet in interface NavigableSet<E>
  - standardHeadSet
```
protected SortedSet<E> standardHeadSet(E toElement)
```
    A sensible definition of ForwardingSortedSet.headSet(Object) in terms of the headSet(Object, boolean) method. If you override headSet(Object, boolean), you may wish to override ForwardingSortedSet.headSet(Object) to forward to this implementation.
  - tailSet
```
public NavigableSet<E> tailSet(E fromElement,
                      boolean inclusive)
```
    Specified by:
    
    tailSet in interface NavigableSet<E>
  - standardTailSet
```
protected SortedSet<E> standardTailSet(E fromElement)
```
    A sensible definition of ForwardingSortedSet.tailSet(Object) in terms of the tailSet(Object, boolean) method. If you override tailSet(Object, boolean), you may wish to override ForwardingSortedSet.tailSet(Object) to forward to this implementation.

Class ForwardingNavigableSet<E>

Nested Class Summary

Constructor Summary

Method Summary

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

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

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

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

Methods inherited from class java.lang.Object

Methods inherited from interface java.util.NavigableSet

Methods inherited from interface java.util.SortedSet

Methods inherited from interface java.util.Set

Constructor Detail

ForwardingNavigableSet

Method Detail

delegate

lower

standardLower

floor

standardFloor

ceiling

standardCeiling

higher

standardHigher

pollFirst

standardPollFirst

pollLast

standardPollLast

standardFirst

standardLast

descendingSet

descendingIterator

subSet

standardSubSet

standardSubSet

headSet

standardHeadSet

tailSet

standardTailSet