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Java > Open Source Codes > org > apache > commons > lang > enum > NestBroken


1 /*
2  * Copyright 2002-2005 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.apache.commons.lang.enum;
17
18 import java.util.Iterator;
19 import java.util.List;
20 import java.util.Map;
21
22 /**
23  * Color enumeration which demonstrates how to break the enum system.
24  * <p>
25  * The class loader sees the two classes here as independent - the enum
26  * class is nested, not an inner class. Calling getEnumList() on ColorEnum
27  * will return an empty list, unless and until the NestBroken class is
28  * referenced.
29  *
30  * @author Stephen Colebourne
31  * @version $Id: NestBroken.java 161244 2005-04-14 06:16:36Z ggregory $
32  */
33
34 public final class NestBroken {
35     
36     public static final ColorEnum RED = new ColorEnum("Red");
37     public static final ColorEnum GREEN = new ColorEnum("Green");
38     public static final ColorEnum BLUE = new ColorEnum("Blue");
39     
40     public NestBroken() {
41         super();
42     }
43     
44     public static final class ColorEnum extends Enum {
45
46         private ColorEnum(String color) {
47             super(color);
48         }
49
50         public static ColorEnum getEnum(String color) {
51             return (ColorEnum) getEnum(ColorEnum.class, color);
52         }
53
54         public static Map getEnumMap() {
55             return getEnumMap(ColorEnum.class);
56         }
57
58         public static List getEnumList() {
59             return getEnumList(ColorEnum.class);
60         }
61
62         public static Iterator iterator() {
63             return iterator(ColorEnum.class);
64         }
65     }
66 }
67
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