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.ECMAErrors.typeError;
  29 import static jdk.nashorn.internal.lookup.Lookup.MH;
  30 
  31 import java.lang.invoke.MethodHandle;
  32 import java.lang.invoke.MethodHandles;
  33 import java.lang.invoke.MethodType;
  34 import jdk.internal.dynalink.linker.GuardedInvocation;
  35 import jdk.internal.dynalink.linker.LinkRequest;
  36 import jdk.nashorn.internal.objects.annotations.Attribute;
  37 import jdk.nashorn.internal.objects.annotations.Constructor;
  38 import jdk.nashorn.internal.objects.annotations.Function;
  39 import jdk.nashorn.internal.objects.annotations.ScriptClass;
  40 import jdk.nashorn.internal.runtime.JSType;
  41 import jdk.nashorn.internal.runtime.PropertyMap;
  42 import jdk.nashorn.internal.runtime.ScriptObject;
  43 import jdk.nashorn.internal.runtime.ScriptRuntime;
  44 import jdk.nashorn.internal.runtime.linker.PrimitiveLookup;
  45 
  46 /**
  47  * ECMA 15.6 Boolean Objects.
  48  */
  49 
  50 @ScriptClass("Boolean")
  51 public final class NativeBoolean extends ScriptObject {
  52     private final boolean value;
  53 
  54     static final MethodHandle WRAPFILTER = findOwnMH("wrapFilter", MH.type(NativeBoolean.class, Object.class));
  55     static final MethodHandle PROTOFILTER = findOwnMH("protoFilter", MH.type(Object.class, Object.class));
  56 
  57     // initialized by nasgen
  58     private static PropertyMap $nasgenmap$;
  59 
  60     static PropertyMap getInitialMap() {
  61         return $nasgenmap$;
  62     }
  63 
  64     private NativeBoolean(final boolean value, final ScriptObject proto, final PropertyMap map) {
  65         super(proto, map);
  66         this.value = value;
  67     }
  68 
  69     NativeBoolean(final boolean flag, final Global global) {
  70         this(flag, global.getBooleanPrototype(), getInitialMap());
  71     }
  72 
  73     NativeBoolean(final boolean flag) {
  74         this(flag, Global.instance());
  75     }
  76 
  77     @Override
  78     public String safeToString() {
  79         return "[Boolean " + toString() + "]";
  80     }
  81 
  82     @Override
  83     public String toString() {
  84         return Boolean.toString(getValue());
  85     }
  86 
  87     /**
  88      * Get the value for this NativeBoolean
  89      * @return true or false
  90      */
  91     public boolean getValue() {
  92         return booleanValue();
  93     }
  94 
  95     /**
  96      * Get the value for this NativeBoolean
  97      * @return true or false
  98      */
  99     public boolean booleanValue() {
 100         return value;
 101     }
 102 
 103     @Override
 104     public String getClassName() {
 105         return "Boolean";
 106     }
 107 
 108     /**
 109      * ECMA 15.6.4.2 Boolean.prototype.toString ( )
 110      *
 111      * @param self self reference
 112      * @return string representation of this boolean
 113      */
 114     @Function(attributes = Attribute.NOT_ENUMERABLE)
 115     public static Object toString(final Object self) {
 116         return getBoolean(self).toString();
 117     }
 118 
 119     /**
 120      * ECMA 15.6.4.3 Boolean.prototype.valueOf ( )
 121      *
 122      * @param self self reference
 123      * @return value of this boolean
 124      */
 125     @Function(attributes = Attribute.NOT_ENUMERABLE)
 126     public static Object valueOf(final Object self) {
 127         return getBoolean(self);
 128     }
 129 
 130     /**
 131      * ECMA 15.6.2.1 new Boolean (value)
 132      *
 133      * @param newObj is the new operator used to instantiate this NativeBoolean
 134      * @param self   self reference
 135      * @param value  value of boolean
 136      * @return the new NativeBoolean
 137      */
 138     @Constructor(arity = 1)
 139     public static Object constructor(final boolean newObj, final Object self, final Object value) {
 140         final boolean flag = JSType.toBoolean(value);
 141 
 142         if (newObj) {
 143             return new NativeBoolean(flag);
 144         }
 145 
 146         return flag;
 147     }
 148 
 149     private static Boolean getBoolean(final Object self) {
 150         if (self instanceof Boolean) {
 151             return ((Boolean)self);
 152         } else if (self instanceof NativeBoolean) {
 153             return ((NativeBoolean)self).getValue();
 154         } else if (self != null && self == Global.instance().getBooleanPrototype()) {
 155             return false;
 156         } else {
 157             throw typeError("not.a.boolean", ScriptRuntime.safeToString(self));
 158         }
 159     }
 160 
 161     /**
 162      * Lookup the appropriate method for an invoke dynamic call.
 163      *
 164      * @param request  The link request
 165      * @param receiver The receiver for the call
 166      * @return Link to be invoked at call site.
 167      */
 168     public static GuardedInvocation lookupPrimitive(final LinkRequest request, final Object receiver) {
 169         return PrimitiveLookup.lookupPrimitive(request, Boolean.class, new NativeBoolean((Boolean)receiver), WRAPFILTER, PROTOFILTER);
 170     }
 171 
 172     /**
 173      * Wrap a native string in a NativeString object.
 174      *
 175      * @param receiver Native string.
 176      * @return Wrapped object.
 177      */
 178     @SuppressWarnings("unused")
 179     private static NativeBoolean wrapFilter(final Object receiver) {
 180         return new NativeBoolean((Boolean)receiver);
 181     }
 182 
 183     @SuppressWarnings("unused")
 184     private static Object protoFilter(final Object object) {
 185         return Global.instance().getBooleanPrototype();
 186     }
 187 
 188     private static MethodHandle findOwnMH(final String name, final MethodType type) {
 189         return MH.findStatic(MethodHandles.lookup(), NativeBoolean.class, name, type);
 190     }
 191 }