com.google.common.collect
Class AbstractLinkedIterator<T>

java.lang.Object
  com.google.common.collect.UnmodifiableIterator<T>
      com.google.common.collect.AbstractLinkedIterator<T>

All Implemented Interfaces:

Iterator<T>

@Beta
@GwtCompatible
public abstract class AbstractLinkedIterator<T>
extends UnmodifiableIterator<T>

This class provides a skeletal implementation of the Iterator interface for sequences whose next element can always be derived from the previous element. Null elements are not supported, nor is the UnmodifiableIterator.remove() method.

Since:

8

Author:

Chris Povirk

AbstractLinkedIterator

protected AbstractLinkedIterator(@Nullable
                                 T firstOrNull)

Creates a new iterator with the given first element, or, if firstOrNull is null, creates a new empty iterator.

computeNext

protected abstract T computeNext(T previous)

Returns the element that follows previous, or returns null if no elements remain. This method is invoked during each call to next() in order to compute the result of a future call to next().

hasNext

public final boolean hasNext()

Description copied from interface: java.util.Iterator

Returns true if the iteration has more elements. (In other words, returns true if Iterator.next() would return an element rather than throwing an exception.)

Returns:

true if the iteration has more elements

next

public final T next()

Description copied from interface: java.util.Iterator

Returns the next element in the iteration.

Returns:

the next element in the iteration