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 */ 017 package org.apache.commons.collections.primitives.decorators; 018 019 import org.apache.commons.collections.primitives.DoubleIterator; 020 021 /** 022 * 023 * @since Commons Primitives 1.0 024 * @version $Revision: 480463 $ $Date: 2006-11-29 09:15:23 +0100 (Wed, 29 Nov 2006) $ 025 * 026 * @author Rodney Waldhoff 027 */ 028 public final class UnmodifiableDoubleIterator extends ProxyDoubleIterator { 029 UnmodifiableDoubleIterator(DoubleIterator iterator) { 030 this.proxied = iterator; 031 } 032 033 public void remove() { 034 throw new UnsupportedOperationException("This DoubleIterator is not modifiable."); 035 } 036 037 protected DoubleIterator getIterator() { 038 return proxied; 039 } 040 041 public static final DoubleIterator wrap(DoubleIterator iterator) { 042 if(null == iterator) { 043 return null; 044 } else if(iterator instanceof UnmodifiableDoubleIterator) { 045 return iterator; 046 } else { 047 return new UnmodifiableDoubleIterator(iterator); 048 } 049 } 050 051 private DoubleIterator proxied = null; 052 }