/*

 * 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 org.apache.commons.collections4.MapIterator;

import org.apache.commons.collections4.ResettableIterator;

/**

 * Provides an implementation of an empty map iterator.

 *

 * @param <K> the type of keys

 * @param <V> the type of mapped values

 * @since 3.1

 */

public class EmptyMapIterator<K, V> extends AbstractEmptyMapIterator<K, V> implements

        MapIterator<K, V>, ResettableIterator<K> {

    /**

     * Singleton instance of the iterator.

     * @since 3.1

     */

    @SuppressWarnings("rawtypes")

    public static final MapIterator INSTANCE = new EmptyMapIterator<>();

    /**

     * Get a typed instance of the iterator.

     * @param <K> the key type

     * @param <V> the value type

     * @return {@link MapIterator}<K, V>

     */

    public static <K, V> MapIterator<K, V> emptyMapIterator() {

        return INSTANCE;

    }

    /**

     * Constructor.

     */

    protected EmptyMapIterator() {

        super();

    }

}