1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.collections.keyvalue;
18  
19  import java.util.Map;
20  
21  import org.apache.commons.collections.KeyValue;
22  
23  /***
24   * A restricted implementation of {@link java.util.Map.Entry} that prevents
25   * the MapEntry contract from being broken.
26   *
27   * @since Commons Collections 3.0
28   * @version $Revision: 438363 $ $Date: 2006-08-30 05:48:00 +0100 (Wed, 30 Aug 2006) $
29   * 
30   * @author James Strachan
31   * @author Michael A. Smith
32   * @author Neil O'Toole
33   * @author Stephen Colebourne
34   */
35  public final class DefaultMapEntry extends AbstractMapEntry {
36      
37      /***
38       * Constructs a new entry with the specified key and given value.
39       *
40       * @param key  the key for the entry, may be null
41       * @param value  the value for the entry, may be null
42       */
43      public DefaultMapEntry(final Object key, final Object value) {
44          super(key, value);
45      }
46  
47      /***
48       * Constructs a new entry from the specified KeyValue.
49       *
50       * @param pair  the pair to copy, must not be null
51       * @throws NullPointerException if the entry is null
52       */
53      public DefaultMapEntry(final KeyValue pair) {
54          super(pair.getKey(), pair.getValue());
55      }
56  
57      /***
58       * Constructs a new entry from the specified MapEntry.
59       *
60       * @param entry  the entry to copy, must not be null
61       * @throws NullPointerException if the entry is null
62       */
63      public DefaultMapEntry(final Map.Entry entry) {
64          super(entry.getKey(), entry.getValue());
65      }
66  
67  }