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.keyvalue;
018    
019    import java.util.Map;
020    
021    import org.apache.commons.collections.KeyValue;
022    
023    /**
024     * A restricted implementation of {@link java.util.Map.Entry} that prevents
025     * the <code>Map.Entry</code> contract from being broken.
026     *
027     * @since Commons Collections 3.0
028     * @version $Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $
029     * 
030     * @author James Strachan
031     * @author Michael A. Smith
032     * @author Neil O'Toole
033     * @author Stephen Colebourne
034     */
035    public final class DefaultMapEntry extends AbstractMapEntry {
036    
037        /**
038         * Constructs a new entry with the specified key and given value.
039         *
040         * @param key  the key for the entry, may be null
041         * @param value  the value for the entry, may be null
042         */
043        public DefaultMapEntry(final Object key, final Object value) {
044            super(key, value);
045        }
046    
047        /**
048         * Constructs a new entry from the specified <code>KeyValue</code>.
049         *
050         * @param pair  the pair to copy, must not be null
051         * @throws NullPointerException if the entry is null
052         */
053        public DefaultMapEntry(final KeyValue pair) {
054            super(pair.getKey(), pair.getValue());
055        }
056    
057        /**
058         * Constructs a new entry from the specified <code>Map.Entry</code>.
059         *
060         * @param entry  the entry to copy, must not be null
061         * @throws NullPointerException if the entry is null
062         */
063        public DefaultMapEntry(final Map.Entry entry) {
064            super(entry.getKey(), entry.getValue());
065        }
066    
067    }