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 static jdk.nashorn.internal.runtime.ScriptRuntime.sameValue;
  29 
  30 import java.util.Objects;
  31 import jdk.nashorn.internal.objects.annotations.Property;
  32 import jdk.nashorn.internal.objects.annotations.ScriptClass;
  33 import jdk.nashorn.internal.runtime.JSType;
  34 import jdk.nashorn.internal.runtime.PropertyDescriptor;
  35 import jdk.nashorn.internal.runtime.PropertyMap;
  36 import jdk.nashorn.internal.runtime.ScriptFunction;
  37 import jdk.nashorn.internal.runtime.ScriptObject;
  38 
  39 /**
  40  * Data Property descriptor is used to represent attributes an object property
  41  * that has data value (instead of a getter or setter function).
  42  *
  43  * See ECMA 8.10 The Property Descriptor and Property Identifier Specification Types
  44  *
  45  */
  46 @ScriptClass("DataPropertyDescriptor")
  47 public final class DataPropertyDescriptor extends ScriptObject implements PropertyDescriptor {
  48     /** is this property configurable */
  49     @Property
  50     public Object configurable;
  51 
  52     /** is this property enumerable */
  53     @Property
  54     public Object enumerable;
  55 
  56     /** is this property writable */
  57     @Property
  58     public Object writable;
  59 
  60     /** value of this property */
  61     @Property
  62     public Object value;
  63 
  64     // initialized by nasgen
  65     private static PropertyMap $nasgenmap$;
  66 
  67     DataPropertyDescriptor(final boolean configurable, final boolean enumerable, final boolean writable, final Object value, final Global global) {
  68         super(global.getObjectPrototype(), $nasgenmap$);
  69         this.configurable = configurable;
  70         this.enumerable   = enumerable;
  71         this.writable     = writable;
  72         this.value        = value;
  73     }
  74 
  75 
  76     @Override
  77     public boolean isConfigurable() {
  78         return JSType.toBoolean(configurable);
  79     }
  80 
  81     @Override
  82     public boolean isEnumerable() {
  83         return JSType.toBoolean(enumerable);
  84     }
  85 
  86     @Override
  87     public boolean isWritable() {
  88         return JSType.toBoolean(writable);
  89     }
  90 
  91     @Override
  92     public Object getValue() {
  93         return value;
  94     }
  95 
  96     @Override
  97     public ScriptFunction getGetter() {
  98         throw new UnsupportedOperationException("getter");
  99     }
 100 
 101     @Override
 102     public ScriptFunction getSetter() {
 103         throw new UnsupportedOperationException("setter");
 104     }
 105 
 106     @Override
 107     public void setConfigurable(final boolean flag) {
 108         this.configurable = flag;
 109     }
 110 
 111     @Override
 112     public void setEnumerable(final boolean flag) {
 113         this.enumerable = flag;
 114     }
 115 
 116     @Override
 117     public void setWritable(final boolean flag) {
 118         this.writable = flag;
 119     }
 120 
 121     @Override
 122     public void setValue(final Object value) {
 123         this.value = value;
 124     }
 125 
 126     @Override
 127     public void setGetter(final Object getter) {
 128         throw new UnsupportedOperationException("set getter");
 129     }
 130 
 131     @Override
 132     public void setSetter(final Object setter) {
 133         throw new UnsupportedOperationException("set setter");
 134     }
 135 
 136     @Override
 137     public PropertyDescriptor fillFrom(final ScriptObject sobj) {
 138         if (sobj.has(CONFIGURABLE)) {
 139             this.configurable = JSType.toBoolean(sobj.get(CONFIGURABLE));
 140         } else {
 141             delete(CONFIGURABLE, false);
 142         }
 143 
 144         if (sobj.has(ENUMERABLE)) {
 145             this.enumerable = JSType.toBoolean(sobj.get(ENUMERABLE));
 146         } else {
 147             delete(ENUMERABLE, false);
 148         }
 149 
 150         if (sobj.has(WRITABLE)) {
 151             this.writable = JSType.toBoolean(sobj.get(WRITABLE));
 152         } else {
 153             delete(WRITABLE, false);
 154         }
 155 
 156         if (sobj.has(VALUE)) {
 157             this.value = sobj.get(VALUE);
 158         } else {
 159             delete(VALUE, false);
 160         }
 161 
 162         return this;
 163     }
 164 
 165     @Override
 166     public int type() {
 167         return DATA;
 168     }
 169 
 170     @Override
 171     public boolean hasAndEquals(final PropertyDescriptor otherDesc) {
 172         if (! (otherDesc instanceof DataPropertyDescriptor)) {
 173             return false;
 174         }
 175 
 176         final DataPropertyDescriptor other = (DataPropertyDescriptor)otherDesc;
 177         return (!has(CONFIGURABLE) || sameValue(configurable, other.configurable)) &&
 178                (!has(ENUMERABLE) || sameValue(enumerable, other.enumerable)) &&
 179                (!has(WRITABLE) || sameValue(writable, other.writable)) &&
 180                (!has(VALUE) || sameValue(value, other.value));
 181     }
 182 
 183     @Override
 184     public boolean equals(final Object obj) {
 185         if (this == obj) {
 186             return true;
 187         }
 188         if (! (obj instanceof DataPropertyDescriptor)) {
 189             return false;
 190         }
 191 
 192         final DataPropertyDescriptor other = (DataPropertyDescriptor)obj;
 193         return sameValue(configurable, other.configurable) &&
 194                sameValue(enumerable, other.enumerable) &&
 195                sameValue(writable, other.writable) &&
 196                sameValue(value, other.value);
 197     }
 198 
 199     @Override
 200     public int hashCode() {
 201         int hash = 5;
 202         hash = 43 * hash + Objects.hashCode(this.configurable);
 203         hash = 43 * hash + Objects.hashCode(this.enumerable);
 204         hash = 43 * hash + Objects.hashCode(this.writable);
 205         hash = 43 * hash + Objects.hashCode(this.value);
 206         return hash;
 207     }
 208 }