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.bag; 018 019 import java.util.Set; 020 021 import org.apache.commons.collections.Bag; 022 import org.apache.commons.collections.collection.AbstractCollectionDecorator; 023 024 /** 025 * Decorates another <code>Bag</code> to provide additional behaviour. 026 * <p> 027 * Methods are forwarded directly to the decorated bag. 028 * 029 * @since Commons Collections 3.0 030 * @version $Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $ 031 * 032 * @author Stephen Colebourne 033 */ 034 public abstract class AbstractBagDecorator 035 extends AbstractCollectionDecorator implements Bag { 036 037 /** 038 * Constructor only used in deserialization, do not use otherwise. 039 * @since Commons Collections 3.1 040 */ 041 protected AbstractBagDecorator() { 042 super(); 043 } 044 045 /** 046 * Constructor that wraps (not copies). 047 * 048 * @param bag the bag to decorate, must not be null 049 * @throws IllegalArgumentException if list is null 050 */ 051 protected AbstractBagDecorator(Bag bag) { 052 super(bag); 053 } 054 055 /** 056 * Gets the bag being decorated. 057 * 058 * @return the decorated bag 059 */ 060 protected Bag getBag() { 061 return (Bag) getCollection(); 062 } 063 064 //----------------------------------------------------------------------- 065 public int getCount(Object object) { 066 return getBag().getCount(object); 067 } 068 069 public boolean add(Object object, int count) { 070 return getBag().add(object, count); 071 } 072 073 public boolean remove(Object object, int count) { 074 return getBag().remove(object, count); 075 } 076 077 public Set uniqueSet() { 078 return getBag().uniqueSet(); 079 } 080 081 }