    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}