    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 *      http://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;
    018
    019/**
    020 * The "read" subset of the {@link java.util.Map} interface.
    021 *
    022 * @param <K> the type of the keys in this map
    023 * @param <V> the type of the values in this map
    024 * @since 4.0
    025 * @see Put
    026 */
    027public interface IterableGet<K, V> extends Get<K, V> {
    028    /**
    029     * Obtains a {@code MapIterator} over the map.
    030     * <p>
    031     * A map iterator is an efficient way of iterating over maps.
    032     * There is no need to access the entry set or use Map Entry objects.
    033     * </p>
    034     * <pre>
    035     * IterableMap&lt;String,Integer&gt; map = new HashedMap&lt;String,Integer&gt;();
    036     * MapIterator&lt;String,Integer&gt; it = map.mapIterator();
    037     * while (it.hasNext()) {
    038     *   String key = it.next();
    039     *   Integer value = it.getValue();
    040     *   it.setValue(value + 1);
    041     * }
    042     * </pre>
    043     *
    044     * @return a map iterator
    045     */
    046    MapIterator<K, V> mapIterator();
    047
    048}