common
Class FilteredIterator

java.lang.Object
  common.FilteredIterator

All Implemented Interfaces:

java.util.Iterator

Direct Known Subclasses:

FilteredMapIterator

public abstract class FilteredIterator
extends java.lang.Object
implements java.util.Iterator

Abstract class for Iterator objects that filter or transform the objects returned by an underlying iterator. Subclasses must implement the filter method, which takes an object returned by the underlying iterator, and either:

• returns null, in which case the FilteredIterator skips this object;
• returns a non-null object, which will be returned by the FilteredIterator.

Constructor Summary

FilteredIterator(java.util.Iterator underlying)
Creates a new FilteredIterator on the given underlying iterator.

Method Summary

protected abstract java.lang.Object	filter(int index, java.lang.Object obj)
boolean	hasNext()
java.lang.Object	next()
void	remove()

Methods inherited from class java.lang.Object

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

Constructor Detail

FilteredIterator

public FilteredIterator(java.util.Iterator underlying)

Creates a new FilteredIterator on the given underlying iterator.

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator

next

public java.lang.Object next()

Specified by:

next in interface java.util.Iterator

remove

public void remove()

Specified by:

remove in interface java.util.Iterator

filter

protected abstract java.lang.Object filter(int index,
                                           java.lang.Object obj)