org.entityfs.util.itr
Class FilteringIterator<T>

java.lang.Object
  org.entityfs.util.itr.FilteringIterator<T>

All Implemented Interfaces:

Iterator<T>

public class FilteringIterator<T>
extends Object
implements Iterator<T>

An iterator that filters the results from another iterator. It can be used to filter returned entities from other iterators.

For instance, if you want all XML files in a directory hierarchy, create a recursive iterator on the root directory of the hierarchy, and filter the returned entities through an EFileNameExtensionFilter.

EntityFS iterators are not thread safe. Don't use them concurrently from several threads without synchronizing access to them.

Since:

1.0

Author:

Karl Gustafsson

Constructor Summary

FilteringIterator(Iterator<? extends T> itr, Filter<? super T> filter)
Create a filtering iterator that filters elements from the iterator through the filter.

Method Summary

boolean	hasNext()
T	next()
void	remove()

Methods inherited from class java.lang.Object

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

Constructor Detail

FilteringIterator

public FilteringIterator(Iterator<? extends T> itr,
                         Filter<? super T> filter)

Create a filtering iterator that filters elements from the iterator through the filter.

Parameters:

itr - The iterator.

filter - The filter.

Method Detail

next

public T next()

Specified by:

next in interface Iterator<T>

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<T>

remove

public void remove()

Specified by:

remove in interface Iterator<T>

Throws:

UnsupportedOperationException - Always.