org.apache.log4j.helpers.NullEnumeration Maven / Gradle / Ivy
/*
* 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.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();
}
}