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 static PropertyMap getInitialMap() {
59 return $nasgenmap$;
60 }
61
62 GenericPropertyDescriptor(final boolean configurable, final boolean enumerable, final Global global) {
63 super(global.getObjectPrototype(), getInitialMap());
64 this.configurable = configurable;
65 this.enumerable = enumerable;
66 }
67
68 @Override
69 public boolean isConfigurable() {
70 return JSType.toBoolean(configurable);
71 }
72
73 @Override
74 public boolean isEnumerable() {
75 return JSType.toBoolean(enumerable);
76 }
77
78 @Override
79 public boolean isWritable() {
80 // Not applicable for this. But simplifies flag calculations.
81 return false;
82 }
83
84 @Override
85 public Object getValue() {
86 throw new UnsupportedOperationException("value");
87 }
88
89 @Override
90 public ScriptFunction getGetter() {
91 throw new UnsupportedOperationException("get");
92 }
93
94 @Override
95 public ScriptFunction getSetter() {
96 throw new UnsupportedOperationException("set");
97 }
98
99 @Override
100 public void setConfigurable(final boolean flag) {
101 this.configurable = flag;
102 }
103
104 @Override
105 public void setEnumerable(final boolean flag) {
106 this.enumerable = flag;
107 }
108
109 @Override
110 public void setWritable(final boolean flag) {
111 throw new UnsupportedOperationException("set writable");
112 }
113
114 @Override
115 public void setValue(final Object value) {
116 throw new UnsupportedOperationException("set value");
117 }
118
119 @Override
120 public void setGetter(final Object getter) {
121 throw new UnsupportedOperationException("set getter");
122 }
123
124 @Override
125 public void setSetter(final Object setter) {
126 throw new UnsupportedOperationException("set setter");
127 }
128
129 @Override
130 public PropertyDescriptor fillFrom(final ScriptObject sobj) {
131 if (sobj.has(CONFIGURABLE)) {
132 this.configurable = JSType.toBoolean(sobj.get(CONFIGURABLE));
133 } else {
134 delete(CONFIGURABLE, false);
135 }
136
137 if (sobj.has(ENUMERABLE)) {
138 this.enumerable = JSType.toBoolean(sobj.get(ENUMERABLE));
139 } else {
140 delete(ENUMERABLE, false);
141 }
142
143 return this;
144 }
145
146 @Override
147 public int type() {
148 return GENERIC;
149 }
150
151 @Override
152 public boolean hasAndEquals(final PropertyDescriptor other) {
153 if (has(CONFIGURABLE) && other.has(CONFIGURABLE)) {
154 if (isConfigurable() != other.isConfigurable()) {
155 return false;
156 }
157 }
158
159 if (has(ENUMERABLE) && other.has(ENUMERABLE)) {
160 if (isEnumerable() != other.isEnumerable()) {
161 return false;
162 }
163 }
164
165 return true;
166 }
167
168 @Override
169 public boolean equals(final Object obj) {
170 if (this == obj) {
171 return true;
172 }
173 if (!(obj instanceof GenericPropertyDescriptor)) {
174 return false;
175 }
176
177 final GenericPropertyDescriptor other = (GenericPropertyDescriptor)obj;
178 return ScriptRuntime.sameValue(configurable, other.configurable) &&
179 ScriptRuntime.sameValue(enumerable, other.enumerable);
180 }
181
182 @Override
183 public int hashCode() {
184 int hash = 7;
185 hash = 97 * hash + Objects.hashCode(this.configurable);
186 hash = 97 * hash + Objects.hashCode(this.enumerable);
187 return hash;
188 }
189 }