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 */ 017package org.apache.commons.collections4.multiset; 018 019import java.util.Set; 020 021import org.apache.commons.collections4.MultiSet; 022import org.apache.commons.collections4.collection.AbstractCollectionDecorator; 023 024/** 025 * Decorates another <code>MultSet</code> to provide additional behaviour. 026 * <p> 027 * Methods are forwarded directly to the decorated multiset. 028 * 029 * @param <E> the type held in the multiset 030 * @since 4.1 031 */ 032public abstract class AbstractMultiSetDecorator<E> 033 extends AbstractCollectionDecorator<E> implements MultiSet<E> { 034 035 /** Serialization version */ 036 private static final long serialVersionUID = 20150610L; 037 038 /** 039 * Constructor only used in deserialization, do not use otherwise. 040 */ 041 protected AbstractMultiSetDecorator() { 042 super(); 043 } 044 045 /** 046 * Constructor that wraps (not copies). 047 * 048 * @param multiset the multiset to decorate, must not be null 049 * @throws NullPointerException if multiset is null 050 */ 051 protected AbstractMultiSetDecorator(final MultiSet<E> multiset) { 052 super(multiset); 053 } 054 055 /** 056 * Gets the multiset being decorated. 057 * 058 * @return the decorated multiset 059 */ 060 @Override 061 protected MultiSet<E> decorated() { 062 return (MultiSet<E>) super.decorated(); 063 } 064 065 @Override 066 public boolean equals(final Object object) { 067 return object == this || decorated().equals(object); 068 } 069 070 @Override 071 public int hashCode() { 072 return decorated().hashCode(); 073 } 074 075 //----------------------------------------------------------------------- 076 077 @Override 078 public int getCount(final Object object) { 079 return decorated().getCount(object); 080 } 081 082 @Override 083 public int setCount(final E object, final int count) { 084 return decorated().setCount(object, count); 085 } 086 087 @Override 088 public int add(final E object, final int count) { 089 return decorated().add(object, count); 090 } 091 092 @Override 093 public int remove(final Object object, final int count) { 094 return decorated().remove(object, count); 095 } 096 097 @Override 098 public Set<E> uniqueSet() { 099 return decorated().uniqueSet(); 100 } 101 102 @Override 103 public Set<Entry<E>> entrySet() { 104 return decorated().entrySet(); 105 } 106 107}