com.carrotsearch.hppc

Class AbstractIterator<E>

java.lang.Object

com.carrotsearch.hppc.AbstractIterator<E>

All Implemented Interfaces:

java.util.Iterator<E>

Direct Known Subclasses:

ByteHashSet.EntryIterator, CharHashSet.EntryIterator, DoubleHashSet.EntryIterator, FloatHashSet.EntryIterator, IntHashSet.EntryIterator, LongHashSet.EntryIterator, ObjectHashSet.EntryIterator, ShortHashSet.EntryIterator

public abstract class AbstractIterator<E>
extends java.lang.Object
implements java.util.Iterator<E>

Simplifies the implementation of iterators a bit. Modeled loosely after Google Guava's API.

Constructor Summary

Constructors

Constructor and Description
AbstractIterator()

Method Summary

Methods

Modifier and Type	Method and Description
protected E	done() Call when done.
protected abstract E	fetch() Fetch next element.
boolean	hasNext()
E	next()
void	remove() Default implementation throws UnsupportedOperationException.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractIterator

public AbstractIterator()

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<E>

next

public E next()

Specified by:

next in interface java.util.Iterator<E>

remove

public void remove()

Default implementation throws UnsupportedOperationException.

Specified by:

remove in interface java.util.Iterator<E>

fetch

protected abstract E fetch()

Fetch next element. The implementation must return done() when all elements have been fetched.

Returns:

Returns the next value for the iterator or chain-calls done().

done

protected final E done()

Call when done.

Returns:

Returns a unique sentinel value to indicate end-of-iteration.