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 * </p> 029 * 030 * @param <E> the type held in the multiset 031 * @since 4.1 032 */ 033public abstract class AbstractMultiSetDecorator<E> 034 extends AbstractCollectionDecorator<E> implements MultiSet<E> { 035 036 /** Serialization version */ 037 private static final long serialVersionUID = 20150610L; 038 039 /** 040 * Constructor only used in deserialization, do not use otherwise. 041 */ 042 protected AbstractMultiSetDecorator() { 043 super(); 044 } 045 046 /** 047 * Constructor that wraps (not copies). 048 * 049 * @param multiset the multiset to decorate, must not be null 050 * @throws NullPointerException if multiset is null 051 */ 052 protected AbstractMultiSetDecorator(final MultiSet<E> multiset) { 053 super(multiset); 054 } 055 056 /** 057 * Gets the multiset being decorated. 058 * 059 * @return the decorated multiset 060 */ 061 @Override 062 protected MultiSet<E> decorated() { 063 return (MultiSet<E>) super.decorated(); 064 } 065 066 @Override 067 public boolean equals(final Object object) { 068 return object == this || decorated().equals(object); 069 } 070 071 @Override 072 public int hashCode() { 073 return decorated().hashCode(); 074 } 075 076 //----------------------------------------------------------------------- 077 078 @Override 079 public int getCount(final Object object) { 080 return decorated().getCount(object); 081 } 082 083 @Override 084 public int setCount(final E object, final int count) { 085 return decorated().setCount(object, count); 086 } 087 088 @Override 089 public int add(final E object, final int count) { 090 return decorated().add(object, count); 091 } 092 093 @Override 094 public int remove(final Object object, final int count) { 095 return decorated().remove(object, count); 096 } 097 098 @Override 099 public Set<E> uniqueSet() { 100 return decorated().uniqueSet(); 101 } 102 103 @Override 104 public Set<Entry<E>> entrySet() { 105 return decorated().entrySet(); 106 } 107 108}