    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      https://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017package org.apache.commons.collections4.iterators;
    018
    019import org.apache.commons.collections4.OrderedMapIterator;
    020
    021/**
    022 * Provides an implementation of an empty ordered map iterator.
    023 *
    024 * @param <K> The type of keys
    025 * @param <V> The type of mapped values
    026 * @since 3.1
    027 */
    028public class EmptyOrderedMapIterator<K, V> extends AbstractEmptyMapIterator<K, V>
    029        implements OrderedMapIterator<K, V> {
    030
    031    /**
    032     * Singleton instance of the iterator.
    033     *
    034     * @since 3.1
    035     */
    036    @SuppressWarnings("rawtypes")
    037    public static final OrderedMapIterator INSTANCE = new EmptyOrderedMapIterator<>();
    038
    039    /**
    040     * Gets a typed instance of the iterator.
    041     *
    042     * @param <K> The key type
    043     * @param <V> The value type
    044     * @return {@link OrderedMapIterator}&lt;K, V&gt;
    045     */
    046    public static <K, V> OrderedMapIterator<K, V> emptyOrderedMapIterator() {
    047        return INSTANCE;
    048    }
    049
    050    /**
    051     * Constructs a new instance.
    052     */
    053    protected EmptyOrderedMapIterator() {
    054    }
    055
    056}