| /* |
| * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package com.sun.beans.decoder; |
| |
| import java.lang.reflect.Array; |
| |
| /** |
| * This class is intended to handle <array> element, |
| * that is used to array creation. |
| * The {@code length} attribute specifies the length of the array. |
| * The {@code class} attribute specifies the elements type. |
| * The {@link Object} type is used by default. |
| * For example:<pre> |
| * <array length="10"/></pre> |
| * is equivalent to {@code new Component[10]} in Java code. |
| * The {@code set} and {@code get} methods, |
| * as defined in the {@link java.util.List} interface, |
| * can be used as if they could be applied to array instances. |
| * The {@code index} attribute can thus be used with arrays. |
| * For example:<pre> |
| * <array length="3" class="java.lang.String"> |
| * <void index="1"> |
| * <string>Hello, world</string> |
| * </void> |
| * </array></pre> |
| * is equivalent to the following Java code:<pre> |
| * String[] s = new String[3]; |
| * s[1] = "Hello, world";</pre> |
| * It is possible to omit the {@code length} attribute and |
| * specify the values directly, without using {@code void} tags. |
| * The length of the array is equal to the number of values specified. |
| * For example:<pre> |
| * <array id="array" class="int"> |
| * <int>123</int> |
| * <int>456</int> |
| * </array></pre> |
| * is equivalent to {@code int[] array = {123, 456}} in Java code. |
| * <p>The following attributes are supported: |
| * <dl> |
| * <dt>length |
| * <dd>the array length |
| * <dt>class |
| * <dd>the type of object for instantiation |
| * <dt>id |
| * <dd>the identifier of the variable that is intended to store the result |
| * </dl> |
| * |
| * @since 1.7 |
| * |
| * @author Sergey A. Malenkov |
| */ |
| final class ArrayElementHandler extends NewElementHandler { |
| private Integer length; |
| |
| /** |
| * Parses attributes of the element. |
| * The following attributes are supported: |
| * <dl> |
| * <dt>length |
| * <dd>the array length |
| * <dt>class |
| * <dd>the type of object for instantiation |
| * <dt>id |
| * <dd>the identifier of the variable that is intended to store the result |
| * </dl> |
| * |
| * @param name the attribute name |
| * @param value the attribute value |
| */ |
| @Override |
| public void addAttribute(String name, String value) { |
| if (name.equals("length")) { // NON-NLS: the attribute name |
| this.length = Integer.valueOf(value); |
| } else { |
| super.addAttribute(name, value); |
| } |
| } |
| |
| /** |
| * Calculates the value of this element |
| * if the lentgh attribute is set. |
| */ |
| @Override |
| public void startElement() { |
| if (this.length != null) { |
| getValueObject(); |
| } |
| } |
| |
| /** |
| * Tests whether the value of this element can be used |
| * as an argument of the element that contained in this one. |
| * |
| * @return {@code true} if the value of this element can be used |
| * as an argument of the element that contained in this one, |
| * {@code false} otherwise |
| */ |
| @Override |
| protected boolean isArgument() { |
| return true; // hack for compatibility |
| } |
| |
| |
| /** |
| * Creates an instance of the array. |
| * |
| * @param type the base class |
| * @param args the array of arguments |
| * @return the value of this element |
| */ |
| @Override |
| protected ValueObject getValueObject(Class<?> type, Object[] args) { |
| if (type == null) { |
| type = Object.class; |
| } |
| if (this.length != null) { |
| return ValueObjectImpl.create(Array.newInstance(type, this.length)); |
| } |
| Object array = Array.newInstance(type, args.length); |
| for (int i = 0; i < args.length; i++) { |
| Array.set(array, i, args[i]); |
| } |
| return ValueObjectImpl.create(array); |
| } |
| } |