org.apache.myfaces.trinidadinternal.context.external.NullEnumeration Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of trinidad-impl Show documentation

Private implementation of the Apache MyFaces Trinidad project

The newest version!

/*
 *  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.myfaces.trinidadinternal.context.external;

import java.util.Enumeration;

/**
 * Enumeration without elements. This was origionally taken from MyFaces.
 *
 * @version $Revision$ $Date$
 */
final class NullEnumeration implements Enumeration
{
  static final NullEnumeration instance()
  {
    return s_nullEnumeration;
  }

  public boolean hasMoreElements()
  {
    return false;
  }

  public String nextElement()
  {
    throw new UnsupportedOperationException("NullEnumeration has no elements");
  }

  private static final NullEnumeration s_nullEnumeration = new NullEnumeration();
}