/*
* Copyright 2014 NAVER Corp.
*
* 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 com.navercorp.pinpoint.common.util;
import java.util.Enumeration;
/**
* @author emeroad
*/
public class EmptyEnumeration<E> implements Enumeration<E> {
private static final NullNextElementAction NULL_NEXT_ELEMENT_ACTION = new NullNextElementAction();
private final NextElementAction<E> nextElementAction;
@SuppressWarnings("unchecked")
public EmptyEnumeration() {
this(NULL_NEXT_ELEMENT_ACTION);
}
public EmptyEnumeration(NextElementAction<E> nextElementAction) {
this.nextElementAction = nextElementAction;
}
@Override
public boolean hasMoreElements() {
return false;
}
@Override
public E nextElement() {
return nextElementAction.nextElement();
}
}