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.collections.primitives.decorators;
018
019import org.apache.commons.collections.primitives.IntIterator;
020
021/**
022 * 
023 * @since Commons Primitives 1.0
024 * @version $Revision: 480463 $ $Date: 2006-11-29 03:15:23 -0500 (Wed, 29 Nov 2006) $
025 * 
026 * @author Rodney Waldhoff 
027 */
028public final class UnmodifiableIntIterator extends ProxyIntIterator {
029    UnmodifiableIntIterator(IntIterator iterator) {
030        this.proxied = iterator;
031    }
032    
033    public void remove() {
034        throw new UnsupportedOperationException("This IntIterator is not modifiable.");
035    }
036
037    protected IntIterator getIterator() {
038        return proxied;   
039    }
040    
041    
042    public static final IntIterator wrap(IntIterator iterator) {
043        if(null == iterator) {
044            return null; 
045        } else if(iterator instanceof UnmodifiableIntIterator) {
046            return iterator;
047        } else {
048            return new UnmodifiableIntIterator(iterator);
049        }
050    }
051
052    private IntIterator proxied = null;    
053}