| /* |
| * Copyright 1999-2006 The Apache Software Foundation. |
| * |
| * Licensed 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.log4j.helpers; |
| |
| import java.util.Enumeration; |
| import java.util.NoSuchElementException; |
| |
| /** |
| |
| An always-empty Enumerator. |
| |
| @author Anders Kristensen |
| @since version 1.0 |
| */ |
| public class NullEnumeration implements Enumeration { |
| private static final NullEnumeration instance = new NullEnumeration(); |
| |
| private |
| NullEnumeration() { |
| } |
| |
| public static NullEnumeration getInstance() { |
| return instance; |
| } |
| |
| public |
| boolean hasMoreElements() { |
| return false; |
| } |
| |
| public |
| Object nextElement() { |
| throw new NoSuchElementException(); |
| } |
| } |