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}