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/*
 * 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.commons.collections4.iterators;

import java.util.ListIterator;

import org.apache.commons.collections4.ResettableListIterator;

/**
 * Provides an implementation of an empty list iterator.
 * 

* This class provides an implementation of an empty list iterator. This class * provides for binary compatibility between Commons Collections 2.1.1 and 3.1 * due to issues with IteratorUtils. * * @since 2.1.1 and 3.1 * @version $Id: EmptyListIterator.java 1543955 2013-11-20 21:23:53Z tn $ */ public class EmptyListIterator extends AbstractEmptyIterator implements ResettableListIterator { /** * Singleton instance of the iterator. * @since 3.1 */ @SuppressWarnings("rawtypes") public static final ResettableListIterator RESETTABLE_INSTANCE = new EmptyListIterator(); /** * Singleton instance of the iterator. * @since 2.1.1 and 3.1 */ @SuppressWarnings("rawtypes") public static final ListIterator INSTANCE = RESETTABLE_INSTANCE; /** * Get a typed instance of the iterator. * @param the element type * @return {@link ResettableListIterator} */ @SuppressWarnings("unchecked") public static ResettableListIterator resettableEmptyListIterator() { return (ResettableListIterator) RESETTABLE_INSTANCE; } /** * Get a typed instance of the iterator. * @param the element type * @return {@link ListIterator} */ @SuppressWarnings("unchecked") public static ListIterator emptyListIterator() { return (ListIterator) INSTANCE; } /** * Constructor. */ protected EmptyListIterator() { super(); } }