org.intermine.util
Class CombinedIterator<E>

java.lang.Object
  org.intermine.util.CombinedIterator<E>

Type Parameters:

E - the element type of the iterator

All Implemented Interfaces:

java.util.Iterator<E>

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

An Iterator that combines the contents of various other Iterators. The provided Iterators will be followed one by one, until the last Iterator has no remaining elements.

Field Summary

protected java.util.Iterator<? extends E>	currentIterator
protected java.util.Iterator<java.util.Iterator<? extends E>>	iteratorIterator

Constructor Summary

CombinedIterator(java.util.List<java.util.Iterator<? extends E>> iterators)
Constructs a CombinedIterator from a List of Iterators.

Method Summary

boolean	hasNext()
E	next()
void	remove() This operation is not supported.

Methods inherited from class java.lang.Object

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

Field Detail

iteratorIterator

protected java.util.Iterator<java.util.Iterator<? extends E>> iteratorIterator

currentIterator

protected java.util.Iterator<? extends E> currentIterator

Constructor Detail

CombinedIterator

public CombinedIterator(java.util.List<java.util.Iterator<? extends E>> iterators)

Constructs a CombinedIterator from a List of Iterators. The provided Iterators should be in a state where the desired elements are present. The act of iterating through this combined iterator will result in the provided Iterators being iterated.

Parameters:

iterators - a List of Iterators to be followed in order

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()

This operation is not supported.

Specified by:

remove in interface java.util.Iterator<E>