1 /*
2 * Copyright (c) 2010, 2013, 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
26 package jdk.nashorn.internal.objects;
27
28 import java.util.Objects;
29 import jdk.nashorn.internal.objects.annotations.Property;
30 import jdk.nashorn.internal.objects.annotations.ScriptClass;
31 import jdk.nashorn.internal.runtime.JSType;
32 import jdk.nashorn.internal.runtime.PropertyDescriptor;
33 import jdk.nashorn.internal.runtime.PropertyMap;
34 import jdk.nashorn.internal.runtime.ScriptFunction;
35 import jdk.nashorn.internal.runtime.ScriptObject;
36 import jdk.nashorn.internal.runtime.ScriptRuntime;
37
38 /**
39 * Generic Property descriptor is used to represent attributes an object property
40 * that is neither a data property descriptor nor an accessor property descriptor.
41 *
42 * See ECMA 8.10 The Property Descriptor and Property Identifier Specification Types
43 *
44 */
45 @ScriptClass("GenericPropertyDescriptor")
46 public final class GenericPropertyDescriptor extends ScriptObject implements PropertyDescriptor {
47 /** Is the property configurable? */
48 @Property
49 public Object configurable;
50
51 /** Is the property writable? */
52 @Property
53 public Object enumerable;
54
55 // initialized by nasgen
56 private static PropertyMap $nasgenmap$;
57
58 GenericPropertyDescriptor(final boolean configurable, final boolean enumerable, final Global global) {
59 super(global.getObjectPrototype(), $nasgenmap$);
60 this.configurable = configurable;
61 this.enumerable = enumerable;
62 }
63
64 @Override
65 public boolean isConfigurable() {
66 return JSType.toBoolean(configurable);
67 }
68
69 @Override
70 public boolean isEnumerable() {
71 return JSType.toBoolean(enumerable);
72 }
73
74 @Override
75 public boolean isWritable() {
76 // Not applicable for this. But simplifies flag calculations.
77 return false;
78 }
79
80 @Override
81 public Object getValue() {
82 throw new UnsupportedOperationException("value");
83 }
84
85 @Override
86 public ScriptFunction getGetter() {
87 throw new UnsupportedOperationException("get");
88 }
89
90 @Override
91 public ScriptFunction getSetter() {
92 throw new UnsupportedOperationException("set");
93 }
94
95 @Override
96 public void setConfigurable(final boolean flag) {
97 this.configurable = flag;
98 }
99
100 @Override
101 public void setEnumerable(final boolean flag) {
102 this.enumerable = flag;
103 }
104
105 @Override
106 public void setWritable(final boolean flag) {
107 throw new UnsupportedOperationException("set writable");
108 }
109
110 @Override
111 public void setValue(final Object value) {
112 throw new UnsupportedOperationException("set value");
113 }
114
115 @Override
116 public void setGetter(final Object getter) {
117 throw new UnsupportedOperationException("set getter");
118 }
119
120 @Override
121 public void setSetter(final Object setter) {
122 throw new UnsupportedOperationException("set setter");
123 }
124
125 @Override
126 public PropertyDescriptor fillFrom(final ScriptObject sobj) {
127 if (sobj.has(CONFIGURABLE)) {
128 this.configurable = JSType.toBoolean(sobj.get(CONFIGURABLE));
129 } else {
130 delete(CONFIGURABLE, false);
131 }
132
133 if (sobj.has(ENUMERABLE)) {
134 this.enumerable = JSType.toBoolean(sobj.get(ENUMERABLE));
135 } else {
136 delete(ENUMERABLE, false);
137 }
138
139 return this;
140 }
141
142 @Override
143 public int type() {
144 return GENERIC;
145 }
146
147 @Override
148 public boolean hasAndEquals(final PropertyDescriptor other) {
149 if (has(CONFIGURABLE) && other.has(CONFIGURABLE)) {
150 if (isConfigurable() != other.isConfigurable()) {
151 return false;
152 }
153 }
154
155 if (has(ENUMERABLE) && other.has(ENUMERABLE)) {
156 if (isEnumerable() != other.isEnumerable()) {
157 return false;
158 }
159 }
160
161 return true;
162 }
163
164 @Override
165 public boolean equals(final Object obj) {
166 if (this == obj) {
167 return true;
168 }
169 if (!(obj instanceof GenericPropertyDescriptor)) {
170 return false;
171 }
172
173 final GenericPropertyDescriptor other = (GenericPropertyDescriptor)obj;
174 return ScriptRuntime.sameValue(configurable, other.configurable) &&
175 ScriptRuntime.sameValue(enumerable, other.enumerable);
176 }
177
178 @Override
179 public int hashCode() {
180 int hash = 7;
181 hash = 97 * hash + Objects.hashCode(this.configurable);
182 hash = 97 * hash + Objects.hashCode(this.enumerable);
183 return hash;
184 }
185 }