de.hpi.fgis.dude.util
Class ChainedIterator<T>

java.lang.Object
  de.hpi.fgis.dude.util.AbstractIterator<T>
      de.hpi.fgis.dude.util.ChainedIterator<T>

Type Parameters:

T - the type of the Iterator

All Implemented Interfaces:

Iterator<T>

public class ChainedIterator<T>
extends AbstractIterator<T>

Logically concatenates several Iterators to one big iterator.

Author:

Arvid.Heise

Constructor Summary

ChainedIterator(Iterable<Iterator<T>> iterators)
Initializes the chained iterator from multiple single iterators.

ChainedIterator(Iterator<Iterator<T>> iterators)
Initializes the chained iterator from multiple single iterators.

ChainedIterator(Iterator<T>... iterators)
Initializes the chained iterator from multiple single iterators.

Method Summary

static <T> ChainedIterator<T>	fromIterables(Iterable<Iterable<T>> iterables) Creates a chained iterator from Iterables.
protected T	loadNextElement() Returns the element of the next iteration step.

Methods inherited from class de.hpi.fgis.dude.util.AbstractIterator

hasNext, next, remove

Methods inherited from class java.lang.Object

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

Constructor Detail

ChainedIterator

public ChainedIterator(Iterable<Iterator<T>> iterators)

Initializes the chained iterator from multiple single iterators.

Parameters:

iterators - the iterators to chain

ChainedIterator

public ChainedIterator(Iterator<Iterator<T>> iterators)

Initializes the chained iterator from multiple single iterators.

Parameters:

iterators - the iterators to chain

ChainedIterator

public ChainedIterator(Iterator<T>... iterators)

Initializes the chained iterator from multiple single iterators.

Parameters:

iterators - the iterators to chain

Method Detail

fromIterables

public static <T> ChainedIterator<T> fromIterables(Iterable<Iterable<T>> iterables)

Creates a chained iterator from Iterables.

Type Parameters:

T - the type of the Iterables

Parameters:

iterables - the iterables from which to create a ChainedIterator.

Returns:

a ChainedIterator iterating over all iterables

loadNextElement

protected T loadNextElement()

Description copied from class: AbstractIterator

Returns the element of the next iteration step. This method needs to be implemented by each sub-class.

Specified by:

loadNextElement in class AbstractIterator<T>

Returns:

The next element.