[lang] ClassCastException in Enum.compareTo

[Samuel Fleischle]

Hi,
I updated from Commons Lang 2.1 to Commons Lang 2.3 and got some issues with 
the changed compareTo() method of Enum.

Here is my simplified Enum:

public class ItemStatus extends Enum {

      public static final ItemStatus CANCEL = new ItemStatus("CANCEL");
public static final ItemStatus SHIPPED = new ItemStatus("SHIPPED");
      public static final ItemStatus MOVED = new ItemStatus("MOVED");

/** Contains each status. */
      private static Set statuses;

// -------------------------------------------------------- Constructors

      protected ItemStatus(String name) {
            super(name);
            System.out.println(this.getClass().getName());
            buildStatusSet();
      }

      // -------------------------------------------------------- Static Methods

      /**
       * Returns the item status enumeration object for the given status name.
       *
       * @param itemStatus
       *            name of the item status
       * @return the enumeration object, or <code>null</code> if it does not
       *         exist
       */
      public static ItemStatus valueOf(String itemStatus) {
            return (ItemStatus) getEnum(ItemStatus.class, itemStatus);
      }

      // -------------------------------------------------------- Public Methods

      /**
       * [EMAIL PROTECTED]
       */
      // @Override
      public final Class getEnumClass() {
            return ItemStatus.class;
      }

      /**
       * Gets all defined ItemStatus.
       *
       * @return the enum object List
       * @see org.apache.commons.lang.enums.Enum#getEnumList(Class)
       */
      public static List getEnumList() {
            return getEnumList(ItemStatus.class);
      }

      // -------------------------------------------------------- Private 
Methods

      /**
       * Adds the status name to a Set of status names.
       */
      private void buildStatusSet() {
            if (statuses == null) {
                  statuses = new TreeSet();
            }
            statuses.add(this);
      }
}

And I got the ClassCastExcetion in the private "buildStatusSet()-Method if I 
try to add the status to the TreeSet. The TreeSet calls the compareTo-Method of 
the Enum. In Commons Lang 2.2 this method was changed with an additional 
comparison of the classes.
In my constructor I added a System.out.println of the instantiated classes and 
got the following output:

com.myapp.common.model.order.ItemStatus$1
com.myapp.common.model.order.ItemStatus$2
com.myapp.common.model.order.ItemStatus$3

The compareTo-Method now tries to compare ItemStatus$1 with ItemStatus$2 and 
says to me, that my ItemStatus-Enums are different classes.

I saw in JIRA there are some other issues in ValuedEnum.compareTo(). Is there a 
bug in the Enum.compareTo() implementation which got changed in Lang 2.2?

Thanks in advance for any help or comment on this issue.

Regards,
Sam