org.jrdf.util
Class FlatteningThreeLongClosableIterator

java.lang.Object
  org.jrdf.util.FlatteningThreeLongClosableIterator

All Implemented Interfaces:

Iterator<Long[]>, ClosableIterator<Long[]>

public class FlatteningThreeLongClosableIterator
extends Object
implements ClosableIterator<Long[]>

Field Summary

protected Map.Entry<Long,ClosableMap<Long,Set<Long>>>	firstEntry
protected Iterator<Long>	itemIterator
protected ClosableIterator<Map.Entry<Long,ClosableMap<Long,Set<Long>>>>	iterator
protected Map.Entry<Long,Set<Long>>	secondEntry
protected Iterator<Map.Entry<Long,Set<Long>>>	subIterator

Constructor Summary

FlatteningThreeLongClosableIterator(ClosableIterator<Map.Entry<Long,ClosableMap<Long,Set<Long>>>> entryIterator)

Method Summary

boolean	close() Closes the iterator by freeing any resources that it current holds.
boolean	hasNext()
Long[]	next()
void	remove()
protected void	updatePosition() Helper method to move the iterators on to the next position.

Methods inherited from class java.lang.Object

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

Field Detail

iterator

protected ClosableIterator<Map.Entry<Long,ClosableMap<Long,Set<Long>>>> iterator

subIterator

protected Iterator<Map.Entry<Long,Set<Long>>> subIterator

itemIterator

protected Iterator<Long> itemIterator

firstEntry

protected Map.Entry<Long,ClosableMap<Long,Set<Long>>> firstEntry

secondEntry

protected Map.Entry<Long,Set<Long>> secondEntry

Constructor Detail

FlatteningThreeLongClosableIterator

public FlatteningThreeLongClosableIterator(ClosableIterator<Map.Entry<Long,ClosableMap<Long,Set<Long>>>> entryIterator)

Method Detail

close

public boolean close()

Description copied from interface: ClosableIterator

Closes the iterator by freeing any resources that it current holds.

This must be done as soon as possible. Once an iterator is closed none of the operations on a iterator will operate i.e. they will throw an exception.

Specified by:

close in interface ClosableIterator<Long[]>

Returns:

true if it was successfully closed.

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<Long[]>

next

public Long[] next()

Specified by:

next in interface Iterator<Long[]>

updatePosition

protected void updatePosition()

Helper method to move the iterators on to the next position. If there is no next position then itemIterator will be set to null, telling hasNext to return false.

remove

public void remove()

Specified by:

remove in interface Iterator<Long[]>