| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.lang.enums; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * Color enumeration which demonstrates how to define the constants in a |
| * different class to the Enum. The extra <code>static{}</code> block is |
| * needed to ensure that the enum constants are created before the |
| * static methods on the ColorEnum are used. |
| * <p> |
| * The class loader sees the two classes here as independent - the enum |
| * class is nested, not an inner class. The static block thus forces the |
| * class load of the outer class, which is needed to initialise the enums. |
| * |
| * @author Apache Software Foundation |
| * @version $Id$ |
| */ |
| |
| public final class NestLinked { |
| |
| public static final ColorEnum RED = new ColorEnum("Red"); |
| public static final ColorEnum GREEN = new ColorEnum("Green"); |
| public static final ColorEnum BLUE = new ColorEnum("Blue"); |
| |
| public NestLinked() { |
| super(); |
| } |
| |
| public static final class ColorEnum extends Enum { |
| |
| static { |
| // Explicitly reference the class where the enums are defined |
| Object obj = NestLinked.RED; |
| } |
| |
| private ColorEnum(String color) { |
| super(color); |
| } |
| |
| public static ColorEnum getEnum(String color) { |
| return (ColorEnum) getEnum(ColorEnum.class, color); |
| } |
| |
| public static Map getEnumMap() { |
| return getEnumMap(ColorEnum.class); |
| } |
| |
| public static List getEnumList() { |
| return getEnumList(ColorEnum.class); |
| } |
| |
| public static Iterator iterator() { |
| return iterator(ColorEnum.class); |
| } |
| } |
| } |