Package com.google.common.collect
Class ForwardingListIterator<E extends @Nullable Object>
- java.lang.Object
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- com.google.common.collect.ForwardingObject
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- com.google.common.collect.ForwardingIterator<E>
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- com.google.common.collect.ForwardingListIterator<E>
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- All Implemented Interfaces:
Iterator<E>,ListIterator<E>
@GwtCompatible public abstract class ForwardingListIterator<E extends @Nullable Object> extends ForwardingIterator<E> implements ListIterator<E>
A list iterator which forwards all its method calls to another list iterator. Subclasses should override one or more methods to modify the behavior of the backing iterator as desired per the decorator pattern.defaultmethod warning: This class forwards calls to only somedefaultmethods. Specifically, it forwards calls only for methods that existed beforedefaultmethods were introduced. For newer methods, likeforEachRemaining, it inherits their default implementations. When those implementations invoke methods, they invoke methods on theForwardingListIterator.- Since:
- 2.0
- Author:
- Mike Bostock
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Constructor Summary
Constructors Modifier Constructor Description protectedForwardingListIterator()Constructor for use by subclasses.
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description voidadd(E element)protected abstract ListIterator<E>delegate()Returns the backing delegate instance that methods are forwarded to.booleanhasPrevious()intnextIndex()Eprevious()intpreviousIndex()voidset(E element)-
Methods inherited from class com.google.common.collect.ForwardingIterator
hasNext, next, remove
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Methods inherited from class com.google.common.collect.ForwardingObject
toString
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface java.util.Iterator
forEachRemaining
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Methods inherited from interface java.util.ListIterator
hasNext, next, remove
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Constructor Detail
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ForwardingListIterator
protected ForwardingListIterator()
Constructor for use by subclasses.
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Method Detail
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delegate
protected abstract ListIterator<E> delegate()
Description copied from class:ForwardingObjectReturns 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 asForwardingSet.delegate(). Concrete subclasses override this method to supply the instance being decorated.- Specified by:
delegatein classForwardingIterator<E extends @Nullable Object>
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add
public void add(E element)
- Specified by:
addin interfaceListIterator<E extends @Nullable Object>
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hasPrevious
public boolean hasPrevious()
- Specified by:
hasPreviousin interfaceListIterator<E extends @Nullable Object>
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nextIndex
public int nextIndex()
- Specified by:
nextIndexin interfaceListIterator<E extends @Nullable Object>
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previous
@CanIgnoreReturnValue public E previous()
- Specified by:
previousin interfaceListIterator<E extends @Nullable Object>
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previousIndex
public int previousIndex()
- Specified by:
previousIndexin interfaceListIterator<E extends @Nullable Object>
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