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| 1 | /* | ||
| 2 | * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | package com.sun.beans.decoder; | ||
| 26 | |||
| 27 | import java.beans.Expression; | ||
| 28 | |||
| 29 | import static java.util.Locale.ENGLISH; | ||
| 30 | |||
| 31 | /** | ||
| 32 | * This class is intended to handle <object> element. | ||
| 33 | * This element looks like <void> element, | ||
| 34 | * but its value is always used as an argument for element | ||
| 35 | * that contains this one. | ||
| 36 | * <p>The following atributes are supported: | ||
| 37 | * <dl> | ||
| 38 | * <dt>class | ||
| 39 | * <dd>the type is used for static methods and fields | ||
| 40 | * <dt>method | ||
| 41 | * <dd>the method name | ||
| 42 | * <dt>property | ||
| 43 | * <dd>the property name | ||
| 44 | * <dt>index | ||
| 45 | * <dd>the property index | ||
| 46 | * <dt>field | ||
| 47 | * <dd>the field name | ||
| 48 | * <dt>idref | ||
| 49 | * <dd>the identifier to refer to the variable | ||
| 50 | * <dt>id | ||
| 51 | * <dd>the identifier of the variable that is intended to store the result | ||
| 52 | * </dl> | ||
| 53 | * | ||
| 54 | * @since 1.7 | ||
| 55 | * | ||
| 56 | * @author Sergey A. Malenkov | ||
| 57 | */ | ||
| 58 | class ObjectElementHandler extends NewElementHandler { | ||
| 59 | private String idref; | ||
| 60 | private String field; | ||
| 61 | private Integer index; | ||
| 62 | private String property; | ||
| 63 | private String method; | ||
| 64 | |||
| 65 | /** | ||
| 66 | * Parses attributes of the element. | ||
| 67 | * The following atributes are supported: | ||
| 68 | * <dl> | ||
| 69 | * <dt>class | ||
| 70 | * <dd>the type is used for static methods and fields | ||
| 71 | * <dt>method | ||
| 72 | * <dd>the method name | ||
| 73 | * <dt>property | ||
| 74 | * <dd>the property name | ||
| 75 | * <dt>index | ||
| 76 | * <dd>the property index | ||
| 77 | * <dt>field | ||
| 78 | * <dd>the field name | ||
| 79 | * <dt>idref | ||
| 80 | * <dd>the identifier to refer to the variable | ||
| 81 | * <dt>id | ||
| 82 | * <dd>the identifier of the variable that is intended to store the result | ||
| 83 | * </dl> | ||
| 84 | * | ||
| 85 | * @param name the attribute name | ||
| 86 | * @param value the attribute value | ||
| 87 | */ | ||
| 88 | @Override | ||
| 89 | public final void addAttribute(String name, String value) { | ||
| 90 | if (name.equals("idref")) { // NON-NLS: the attribute name | ||
| 91 | this.idref = value; | ||
| 92 | } else if (name.equals("field")) { // NON-NLS: the attribute name | ||
| 93 | this.field = value; | ||
| 94 | } else if (name.equals("index")) { // NON-NLS: the attribute name | ||
| 95 | this.index = Integer.valueOf(value); | ||
| 96 | addArgument(this.index); // hack for compatibility | ||
| 97 | } else if (name.equals("property")) { // NON-NLS: the attribute name | ||
| 98 | this.property = value; | ||
| 99 | } else if (name.equals("method")) { // NON-NLS: the attribute name | ||
| 100 | this.method = value; | ||
| 101 | } else { | ||
| 102 | super.addAttribute(name, value); | ||
| 103 | } | ||
| 104 | } | ||
| 105 | |||
| 106 | /** | ||
| 107 | * Calculates the value of this element | ||
| 108 | * if the field attribute or the idref attribute is set. | ||
| 109 | */ | ||
| 110 | @Override | ||
| 111 | public final void startElement() { | ||
| 112 | if ((this.field != null) || (this.idref != null)) { | ||
| 113 | getValueObject(); | ||
| 114 | } | ||
| 115 | } | ||
| 116 | |||
| 117 | /** | ||
| 118 | * Tests whether the value of this element can be used | ||
| 119 | * as an argument of the element that contained in this one. | ||
| 120 | * | ||
| 121 | * @return {@code true} if the value of this element can be used | ||
| 122 | * as an argument of the element that contained in this one, | ||
| 123 | * {@code false} otherwise | ||
| 124 | */ | ||
| 125 | @Override | ||
| 126 | protected boolean isArgument() { | ||
| 127 | return true; // hack for compatibility | ||
| 128 | } | ||
| 129 | |||
| 130 | /** | ||
| 131 | * Creates the value of this element. | ||
| 132 | * | ||
| 133 | * @param type the base class | ||
| 134 | * @param args the array of arguments | ||
| 135 | * @return the value of this element | ||
| 136 | * @throws Exception if calculation is failed | ||
| 137 | */ | ||
| 138 | @Override | ||
| 139 | protected final ValueObject getValueObject(Class<?> type, Object[] args) throws Exception { | ||
| 140 | if (this.field != null) { | ||
| 141 | return ValueObjectImpl.create(FieldElementHandler.getFieldValue(getContextBean(), this.field)); | ||
| 142 | } | ||
| 143 | if (this.idref != null) { | ||
| 144 | return ValueObjectImpl.create(getVariable(this.idref)); | ||
| 145 | } | ||
| 146 | Object bean = getContextBean(); | ||
| 147 | String name; | ||
| 148 | if (this.index != null) { | ||
| 149 | name = (args.length == 2) | ||
| 150 | ? PropertyElementHandler.SETTER | ||
| 151 | : PropertyElementHandler.GETTER; | ||
| 152 | } else if (this.property != null) { | ||
| 153 | name = (args.length == 1) | ||
| 154 | ? PropertyElementHandler.SETTER | ||
| 155 | : PropertyElementHandler.GETTER; | ||
| 156 | |||
| 157 | if (0 < this.property.length()) { | ||
| 158 | name += this.property.substring(0, 1).toUpperCase(ENGLISH) + this.property.substring(1); | ||
| 159 | } | ||
| 160 | } else { | ||
| 161 | name = (this.method != null) && (0 < this.method.length()) | ||
| 162 | ? this.method | ||
| 163 | : "new"; // NON-NLS: the constructor marker | ||
| 164 | } | ||
| 165 | Expression expression = new Expression(bean, name, args); | ||
| 166 | return ValueObjectImpl.create(expression.getValue()); | ||
| 167 | } | ||
| 168 | } | ||