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.wicket.util.collections;
018
019import java.util.Iterator;
020
021/**
022 * Base class for read-only iterators. Calls to {@link #remove()} will result in an
023 * {@link UnsupportedOperationException}
024 * 
025 * @author Igor Vaynberg (ivaynberg)
026 * @param <T>
027 */
028public abstract class ReadOnlyIterator<T> implements Iterator<T>
029{
030        @Override
031        public final void remove()
032        {
033                throw new UnsupportedOperationException("Iterator " + getClass().getName() +
034                        " is a read-only iterator. Calls to remove() are not allowed");
035        }
036}