org.apache.solr.common.util

Class IteratorChain<E>

java.lang.Object

org.apache.solr.common.util.IteratorChain<E>

All Implemented Interfaces:

java.util.Iterator<E>

Direct Known Subclasses:

IteratorChain

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

Chain several Iterators, so that this iterates over all of them in sequence.

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.Iterator<E>	current
private java.util.List<java.util.Iterator<E>>	iterators
private java.util.Iterator<java.util.Iterator<E>>	itit

Constructor Summary

Constructors

Constructor and Description
IteratorChain()

Method Summary

Modifier and Type	Method and Description
void	addIterator(java.util.Iterator<E> it)
boolean	hasNext()
E	next() hasNext() must ALWAYS be called before calling this otherwise it's a bit hard to keep track of what's happening
private boolean	recursiveHasNext() test if current iterator hasNext(), and if not try the next one in sequence, recursively
void	remove()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Field Detail

iterators

private final java.util.List<java.util.Iterator<E>> iterators

itit

private java.util.Iterator<java.util.Iterator<E>> itit

current

private java.util.Iterator<E> current

Constructor Detail

IteratorChain

public IteratorChain()

Method Detail

addIterator

public void addIterator(java.util.Iterator<E> it)

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<E>

recursiveHasNext

private boolean recursiveHasNext()

test if current iterator hasNext(), and if not try the next one in sequence, recursively

next

public E next()

hasNext() must ALWAYS be called before calling this otherwise it's a bit hard to keep track of what's happening

Specified by:

next in interface java.util.Iterator<E>

remove

public void remove()

Specified by:

remove in interface java.util.Iterator<E>