For when you absolutely positively have to create an enum.

getOrCreateEnum.java

static <T extends Enum<T>> T getOrCreateEnum(Class<T> enumType,
    String name, int ordinal) {
  try {
    return Enum.valueOf(enumType, name);
  } catch (IllegalArgumentException createFascimileInstead) {
  }
  try {
    T enumValue = (T) getUnsafe().allocateInstance(enumType);

    Field nameField = Enum.class.getDeclaredField("name");
    nameField.setAccessible(true);
    nameField.set(enumValue, name);

    Field ordinalField = Enum.class.getDeclaredField("ordinal");
    ordinalField.setAccessible(true);
    ordinalField.set(enumValue, ordinal);

    return enumValue;

  } catch (SecurityException e) {
    // return null for degraded results.
    return null;
  } catch (ReflectiveOperationException e) {
    throw new LinkageError(e.toString());
  }
}

static Unsafe getUnsafe() {
  try {
    return Unsafe.getUnsafe();
  } catch (SecurityException tryReflectionInstead) {
  }
  try {
    Field theUnsafeField = Unsafe.class.getDeclaredField("theUnsafe");
    theUnsafeField.setAccessible(true);
    return (Unsafe) theUnsafeField.get(null);
  } catch (ReflectiveOperationException e) {
    throw new LinkageError(e.toString());
  }
}