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From scolebou...@apache.org
Subject cvs commit: jakarta-commons/lang/src/test/org/apache/commons/lang/enum NestReferenced.java NestLinked.java NestBroken.java Nest.java EnumTest.java
Date Sat, 29 Nov 2003 15:03:54 GMT
scolebourne    2003/11/29 07:03:54

  Modified:    lang/src/java/org/apache/commons/lang/enum Enum.java
               lang/src/test/org/apache/commons/lang/enum EnumTest.java
  Added:       lang/src/test/org/apache/commons/lang/enum
                        NestReferenced.java NestLinked.java NestBroken.java
                        Nest.java
  Log:
  Add description and tests about the perils of nested enums
  bug 23374
  
  Revision  Changes    Path
  1.23      +48 -1     jakarta-commons/lang/src/java/org/apache/commons/lang/enum/Enum.java
  
  Index: Enum.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/lang/src/java/org/apache/commons/lang/enum/Enum.java,v
  retrieving revision 1.22
  retrieving revision 1.23
  diff -u -r1.22 -r1.23
  --- Enum.java	7 Sep 2003 14:32:34 -0000	1.22
  +++ Enum.java	29 Nov 2003 15:03:54 -0000	1.23
  @@ -214,7 +214,54 @@
    * </pre>
    * <p>The code above will work on JDK 1.2. If JDK1.3 and later is used,
    * the subclasses may be defined as anonymous.</p>
  + * 
  + * <h4>Nested class Enums</h4>
    *
  + * <p>Care must be taken with class loading when defining a static nested class
  + * for enums. The static nested class can be loaded without the surrounding outer
  + * class being loaded. This can result in an empty list/map/iterator being returned.
  + * One solution is to define a static block that references the outer class where
  + * the constants are defined. For example:</p>
  + *
  + * <pre>
  + * public final class Outer {
  + *   public static final BWEnum BLACK = new BWEnum("Black");
  + *   public static final BWEnum WHITE = new BWEnum("White");
  + *
  + *   // static nested enum class
  + *   public static final class BWEnum extends Enum {
  + * 
  + *     static {
  + *       // explicitly reference BWEnum class to force constants to load
  + *       Object obj = Outer.BLACK;
  + *     }
  + * 
  + *     // ... other methods omitted
  + *   }
  + * }
  + * </pre>
  + * 
  + * <p>Although the above solves the problem, it is not recommended. The best solution
  + * is to define the constants in the enum class, and hold references in the outer class:
  + *
  + * <pre>
  + * public final class Outer {
  + *   public static final BWEnum BLACK = BWEnum.BLACK;
  + *   public static final BWEnum WHITE = BWEnum.WHITE;
  + *
  + *   // static nested enum class
  + *   public static final class BWEnum extends Enum {
  + *     // only define constants in enum classes - private if desired
  + *     private static final BWEnum BLACK = new BWEnum("Black");
  + *     private static final BWEnum WHITE = new BWEnum("White");
  + * 
  + *     // ... other methods omitted
  + *   }
  + * }
  + * </pre>
  + * 
  + * <p>For more details, see the 'Nested' test cases.
  + * 
    * @author Apache Avalon project
    * @author Stephen Colebourne
    * @author Chris Webb
  
  
  
  1.12      +57 -7     jakarta-commons/lang/src/test/org/apache/commons/lang/enum/EnumTest.java
  
  Index: EnumTest.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/lang/src/test/org/apache/commons/lang/enum/EnumTest.java,v
  retrieving revision 1.11
  retrieving revision 1.12
  diff -u -r1.11 -r1.12
  --- EnumTest.java	18 Aug 2003 02:22:27 -0000	1.11
  +++ EnumTest.java	29 Nov 2003 15:03:54 -0000	1.12
  @@ -53,6 +53,8 @@
    */
   package org.apache.commons.lang.enum;
   
  +import java.util.ArrayList;
  +import java.util.HashMap;
   import java.util.Iterator;
   import java.util.List;
   import java.util.Map;
  @@ -132,7 +134,7 @@
       }
   
       public void testList() {
  -        List list = ColorEnum.getEnumList();
  +        List list = new ArrayList(ColorEnum.getEnumList());
           
           assertNotNull(list);
           
  @@ -146,19 +148,17 @@
       }
   
       public void testMap() {
  -        Map map = ColorEnum.getEnumMap();
  +        Map map = new HashMap(ColorEnum.getEnumMap());
           
           assertNotNull(map);
  -        
  -        assertEquals( map.keySet().size(),
  -        				ColorEnum.getEnumList().size());
  -        
           assertTrue(map.containsValue(ColorEnum.RED));
           assertTrue(map.containsValue(ColorEnum.GREEN));
           assertTrue(map.containsValue(ColorEnum.BLUE));
           assertSame(ColorEnum.RED, map.get("Red"));
           assertSame(ColorEnum.GREEN, map.get("Green"));
           assertSame(ColorEnum.BLUE, map.get("Blue"));
  +        assertEquals( map.keySet().size(),
  +                        ColorEnum.getEnumList().size());
       }
   
       public void testGet() {
  @@ -413,6 +413,56 @@
           assertSame(Extended3Enum.BETA, map.get("Beta"));
           assertSame(Extended3Enum.GAMMA, map.get("Gamma"));
           assertSame(Extended3Enum.DELTA, map.get("Delta"));
  +    }
  +
  +    //-----------------------------------------------------------------------
  +    public void testNested() {
  +        List list = new ArrayList(Nest.ColorEnum.getEnumList());
  +        assertEquals(3, list.size());  // all is well
  +        Iterator it = list.iterator();
  +        assertSame(Nest.ColorEnum.RED, it.next());
  +        assertSame(Nest.ColorEnum.GREEN, it.next());
  +        assertSame(Nest.ColorEnum.BLUE, it.next());
  +        // This nesting works because the enum constants are defined in the SAME
  +        // class as the getEnumList(). It just acts as a normal enum.
  +    }
  +
  +    public void testNestedBroken() {
  +        List list = new ArrayList(NestBroken.ColorEnum.getEnumList());
  +        assertEquals(0, list.size());  // no enums!!! 
  +        // this is BROKEN because the enum constants are defined in a DIFFERENT
  +        // class from getEnumList(). Once NestBroken class is referenced,
  +        // and thus class loaded with its enum constants, the getEnumList works:
  +        new NestBroken();
  +        list = new ArrayList(NestBroken.ColorEnum.getEnumList());
  +        assertEquals(3, list.size());  // all is well!!!
  +        Iterator it = list.iterator();
  +        assertSame(NestBroken.RED, it.next());
  +        assertSame(NestBroken.GREEN, it.next());
  +        assertSame(NestBroken.BLUE, it.next());
  +    }
  +
  +    public void testNestedLinked() {
  +        List list = new ArrayList(NestLinked.ColorEnum.getEnumList());
  +        assertEquals(3, list.size());  // all is well
  +        Iterator it = list.iterator();
  +        assertSame(NestLinked.RED, it.next());
  +        assertSame(NestLinked.GREEN, it.next());
  +        assertSame(NestLinked.BLUE, it.next());
  +        // This nesting works because a static block in the enum class forces a
  +        // class load of the outer class which defines the enum constants.
  +    }
  +
  +    public void testNestedReferenced() {
  +        List list = new ArrayList(NestReferenced.ColorEnum.getEnumList());
  +        assertEquals(3, list.size());  // all is well
  +        Iterator it = list.iterator();
  +        assertSame(NestReferenced.RED, it.next());
  +        assertSame(NestReferenced.GREEN, it.next());
  +        assertSame(NestReferenced.BLUE, it.next());
  +        // This nesting works because the enum constants are actually defined in
  +        // the SAME class as the getEnumList(). The references in the outer class
  +        // are just extra references.
       }
   
   }
  
  
  
  1.1                  jakarta-commons/lang/src/test/org/apache/commons/lang/enum/NestReferenced.java
  
  Index: NestReferenced.java
  ===================================================================
  /* ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2002-2003 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowledgement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgement may appear in the software itself,
   *    if and wherever such third-party acknowledgements normally appear.
   *
   * 4. The names "The Jakarta Project", "Commons", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  package org.apache.commons.lang.enum;
  
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
  
  /**
   * Color enumeration which demonstrates how to provide a view of the constants
   * in a different class to the Enum. This technique is the safest, however it
   * is obviously inconvenient as it involves defining two sets of constants.
   * See NestedLinked for an alternative.
   *
   * @author Stephen Colebourne
   * @version $Id: NestReferenced.java,v 1.1 2003/11/29 15:03:54 scolebourne Exp $
   */
  
  public final class NestReferenced {
      
      public static final ColorEnum RED = ColorEnum.RED;
      public static final ColorEnum GREEN = ColorEnum.GREEN;
      public static final ColorEnum BLUE = ColorEnum.BLUE;
      
      public NestReferenced() {
          super();
      }
      
      public static final class ColorEnum extends Enum {
  
          // must be defined here, not just in outer class
          private static final ColorEnum RED = new ColorEnum("Red");
          private static final ColorEnum GREEN = new ColorEnum("Green");
          private static final ColorEnum BLUE = new ColorEnum("Blue");
          
          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);
          }
      }
  }
  
  
  
  1.1                  jakarta-commons/lang/src/test/org/apache/commons/lang/enum/NestLinked.java
  
  Index: NestLinked.java
  ===================================================================
  /* ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2002-2003 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowledgement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgement may appear in the software itself,
   *    if and wherever such third-party acknowledgements normally appear.
   *
   * 4. The names "The Jakarta Project", "Commons", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  package org.apache.commons.lang.enum;
  
  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 Stephen Colebourne
   * @version $Id: NestLinked.java,v 1.1 2003/11/29 15:03:54 scolebourne Exp $
   */
  
  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);
          }
      }
  }
  
  
  
  1.1                  jakarta-commons/lang/src/test/org/apache/commons/lang/enum/NestBroken.java
  
  Index: NestBroken.java
  ===================================================================
  /* ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2002-2003 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowledgement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgement may appear in the software itself,
   *    if and wherever such third-party acknowledgements normally appear.
   *
   * 4. The names "The Jakarta Project", "Commons", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  package org.apache.commons.lang.enum;
  
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
  
  /**
   * Color enumeration which demonstrates how to break the enum system.
   * <p>
   * The class loader sees the two classes here as independent - the enum
   * class is nested, not an inner class. Calling getEnumList() on ColorEnum
   * will return an empty list, unless and until the NestBroken class is
   * referenced.
   *
   * @author Stephen Colebourne
   * @version $Id: NestBroken.java,v 1.1 2003/11/29 15:03:54 scolebourne Exp $
   */
  
  public final class NestBroken {
      
      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 NestBroken() {
          super();
      }
      
      public static final class ColorEnum extends Enum {
  
          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);
          }
      }
  }
  
  
  
  1.1                  jakarta-commons/lang/src/test/org/apache/commons/lang/enum/Nest.java
  
  Index: Nest.java
  ===================================================================
  /* ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2002-2003 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowledgement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgement may appear in the software itself,
   *    if and wherever such third-party acknowledgements normally appear.
   *
   * 4. The names "The Jakarta Project", "Commons", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  package org.apache.commons.lang.enum;
  
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
  
  /**
   * Color enumeration demonstrating a normal simple nesting case.
   * All is well here as the nested enum class is really no different
   * to any other class.
   *
   * @author Stephen Colebourne
   * @version $Id: Nest.java,v 1.1 2003/11/29 15:03:54 scolebourne Exp $
   */
  
  public final class Nest {
      
      public Nest() {
          super();
      }
      
      public static final class ColorEnum extends Enum {
          public static final ColorEnum RED = new ColorEnum("Red");
          public static final ColorEnum GREEN = new ColorEnum("Green");
          public static final ColorEnum BLUE = new ColorEnum("Blue");
  
          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);
          }
      }
  }
  
  
  

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