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.jexl2.internal; 018 019 import java.lang.reflect.Array; 020 import java.util.AbstractList; 021 022 /** 023 * A class that wraps an array with a List interface. 024 * 025 * @author Chris Schultz <chris@christopherschultz.net$gt; 026 * @version $Revision$ $Date: 2006-04-14 19:40:41 $ 027 */ 028 public class ArrayListWrapper extends AbstractList<Object> { 029 /** the array to wrap. */ 030 private final Object array; 031 032 /** 033 * Create the wrapper. 034 * @param anArray {@link #array} 035 */ 036 public ArrayListWrapper(Object anArray) { 037 if (!anArray.getClass().isArray()) { 038 throw new IllegalArgumentException(anArray.getClass() + " is not an array"); 039 } 040 this.array = anArray; 041 } 042 043 /** {@inheritDoc} */ 044 @Override 045 public Object get(int index) { 046 return Array.get(array, index); 047 } 048 049 /** {@inheritDoc} */ 050 @Override 051 public Object set(int index, Object element) { 052 Object old = get(index); 053 Array.set(array, index, element); 054 return old; 055 } 056 057 /** {@inheritDoc} */ 058 @Override 059 public int size() { 060 return Array.getLength(array); 061 } 062 }