    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.bidimap;
    018
    019import java.util.Comparator;
    020import java.util.SortedMap;
    021
    022import org.apache.commons.collections4.SortedBidiMap;
    023
    024/**
    025 * Provides a base decorator that enables additional functionality to be added
    026 * to a SortedBidiMap via decoration.
    027 * <p>
    028 * Methods are forwarded directly to the decorated map.
    029 * </p>
    030 * <p>
    031 * This implementation does not perform any special processing with the map views.
    032 * Instead it simply returns the inverse from the wrapped map. This may be
    033 * undesirable, for example if you are trying to write a validating implementation
    034 * it would provide a loophole around the validation.
    035 * But, you might want that loophole, so this class is kept simple.
    036 * </p>
    037 *
    038 * @param <K> the type of the keys in this map
    039 * @param <V> the type of the values in this map
    040 * @since 3.0
    041 */
    042public abstract class AbstractSortedBidiMapDecorator<K, V>
    043        extends AbstractOrderedBidiMapDecorator<K, V> implements SortedBidiMap<K, V> {
    044
    045    /**
    046     * Constructor that wraps (not copies).
    047     *
    048     * @param map  the map to decorate, must not be null
    049     * @throws NullPointerException if the collection is null
    050     */
    051    public AbstractSortedBidiMapDecorator(final SortedBidiMap<K, V> map) {
    052        super(map);
    053    }
    054
    055    /**
    056     * Gets the map being decorated.
    057     *
    058     * @return the decorated map
    059     */
    060    @Override
    061    protected SortedBidiMap<K, V> decorated() {
    062        return (SortedBidiMap<K, V>) super.decorated();
    063    }
    064
    065    //-----------------------------------------------------------------------
    066    @Override
    067    public SortedBidiMap<V, K> inverseBidiMap() {
    068        return decorated().inverseBidiMap();
    069    }
    070
    071    @Override
    072    public Comparator<? super K> comparator() {
    073        return decorated().comparator();
    074    }
    075
    076    @Override
    077    public Comparator<? super V> valueComparator() {
    078        return decorated().valueComparator();
    079    }
    080
    081    @Override
    082    public SortedMap<K, V> subMap(final K fromKey, final K toKey) {
    083        return decorated().subMap(fromKey, toKey);
    084    }
    085
    086    @Override
    087    public SortedMap<K, V> headMap(final K toKey) {
    088        return decorated().headMap(toKey);
    089    }
    090
    091    @Override
    092    public SortedMap<K, V> tailMap(final K fromKey) {
    093        return decorated().tailMap(fromKey);
    094    }
    095
    096}