1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.commons.collections4.iterators; 18 19 /** 20 * Provides an implementation of an empty map iterator. 21 * 22 * @param <K> the type of keys 23 * @param <V> the type of mapped values 24 * @since 4.0 25 */ 26 public abstract class AbstractEmptyMapIterator<K, V> extends AbstractEmptyIterator<K> { 27 28 /** 29 * Create a new AbstractEmptyMapIterator. 30 */ 31 public AbstractEmptyMapIterator() { 32 } 33 34 public K getKey() { 35 throw new IllegalStateException("Iterator contains no elements"); 36 } 37 38 public V getValue() { 39 throw new IllegalStateException("Iterator contains no elements"); 40 } 41 42 public V setValue(final V value) { 43 throw new IllegalStateException("Iterator contains no elements"); 44 } 45 46 }