Remove as added after 2.0, and is now in subpackage
git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/collections/trunk@130821 13f79535-47bb-0310-9956-ffa450edef68
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/*
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* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/java/org/apache/commons/collections/Attic/UniqueFilterIterator.java,v 1.4 2002/10/12 22:15:18 scolebourne Exp $
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* $Revision: 1.4 $
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* $Date: 2002/10/12 22:15:18 $
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*
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* ====================================================================
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*
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* The Apache Software License, Version 1.1
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*
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* Copyright (c) 1999-2002 The Apache Software Foundation. All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. The end-user documentation included with the redistribution, if
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* any, must include the following acknowlegement:
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* "This product includes software developed by the
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* Apache Software Foundation (http://www.apache.org/)."
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* Alternately, this acknowlegement may appear in the software itself,
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* if and wherever such third-party acknowlegements normally appear.
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*
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* 4. The names "The Jakarta Project", "Commons", and "Apache Software
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* Foundation" must not be used to endorse or promote products derived
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* from this software without prior written permission. For written
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* permission, please contact apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache"
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* nor may "Apache" appear in their names without prior written
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* permission of the Apache Group.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package org.apache.commons.collections;
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import java.util.HashSet;
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import java.util.Iterator;
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/** A FilterIterator which only returns "unique" Objects. Internally,
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* the Iterator maintains a Set of objects it has already encountered,
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* and duplicate Objects are skipped.
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*
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* @author Morgan Delagrange
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* @version $Id: UniqueFilterIterator.java,v 1.4 2002/10/12 22:15:18 scolebourne Exp $
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* @since 2.1
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*/
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public class UniqueFilterIterator extends FilterIterator {
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//-------------------------------------------------------------------------
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/**
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* Constructs a new <Code>UniqueFilterIterator</Code>.
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*
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* @param iterator the iterator to use
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*/
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public UniqueFilterIterator( Iterator iterator ) {
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super( iterator, new UniquePredicate() );
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}
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private static class UniquePredicate implements Predicate {
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HashSet set = new HashSet();
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public boolean evaluate(Object object) {
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return set.add(object);
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}
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}
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}
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