01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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: }
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