| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.jexl3.internal.introspection; |
| |
| import java.lang.reflect.Array; |
| import java.util.AbstractList; |
| import java.util.RandomAccess; |
| |
| /** |
| * A class that wraps an array within an AbstractList. |
| * <p> |
| * It overrides some methods because introspection uses this class a a marker for wrapped arrays; the declared class |
| * for these method is thus ArrayListWrapper. |
| * The methods are get/set/size/contains and indexOf because it is used by contains. |
| * </p> |
| */ |
| public class ArrayListWrapper extends AbstractList<Object> implements RandomAccess { |
| /** the array to wrap. */ |
| private final Object array; |
| |
| /** |
| * Create the wrapper. |
| * @param anArray {@link #array} |
| */ |
| public ArrayListWrapper(final Object anArray) { |
| if (!anArray.getClass().isArray()) { |
| throw new IllegalArgumentException(anArray.getClass() + " is not an array"); |
| } |
| this.array = anArray; |
| } |
| |
| @Override |
| public Object get(final int index) { |
| return Array.get(array, index); |
| } |
| |
| @Override |
| public Object set(final int index, final Object element) { |
| final Object old = Array.get(array, index); |
| Array.set(array, index, element); |
| return old; |
| } |
| |
| @Override |
| public int size() { |
| return Array.getLength(array); |
| } |
| |
| @Override |
| public int indexOf(final Object o) { |
| final int size = size(); |
| if (o == null) { |
| for (int i = 0; i < size; i++) { |
| if (get(i) == null) { |
| return i; |
| } |
| } |
| } else { |
| for (int i = 0; i < size; i++) { |
| if (o.equals(get(i))) { |
| return i; |
| } |
| } |
| } |
| return -1; |
| } |
| |
| @Override |
| public boolean contains(final Object o) { |
| return indexOf(o) != -1; |
| } |
| } |