001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.commons.collections.iterators; 018 019 import java.util.Iterator; 020 021 import org.apache.commons.collections.functors.UniquePredicate; 022 023 /** 024 * A FilterIterator which only returns "unique" Objects. Internally, 025 * the Iterator maintains a Set of objects it has already encountered, 026 * and duplicate Objects are skipped. 027 * 028 * @since Commons Collections 2.1 029 * @version $Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $ 030 * 031 * @author Morgan Delagrange 032 */ 033 public class UniqueFilterIterator extends FilterIterator { 034 035 //------------------------------------------------------------------------- 036 037 /** 038 * Constructs a new <code>UniqueFilterIterator</code>. 039 * 040 * @param iterator the iterator to use 041 */ 042 public UniqueFilterIterator( Iterator iterator ) { 043 super(iterator, UniquePredicate.getInstance()); 044 } 045 046 }