jlibs.core.util.EmptyIterator Maven / Gradle / Ivy
/**
* Copyright 2015 Santhosh Kumar Tekuri
*
* The JLibs authors license 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 jlibs.core.util;
import java.util.Iterator;
import java.util.NoSuchElementException;
/**
* @author Santhosh Kumar T
*/
public class EmptyIterator implements Iterator{
private static final EmptyIterator INSTANCE = new EmptyIterator();
@SuppressWarnings({"unchecked"})
public static Iterator instance(){
return INSTANCE;
}
private EmptyIterator(){}
@Override
public boolean hasNext(){
return false;
}
@Override
public Object next(){
throw new NoSuchElementException();
}
@Override
public void remove(){
throw new IllegalStateException();
}
}