/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package jdk.nashorn.internal.objects;
import static jdk.nashorn.internal.lookup.Lookup.MH;
import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import jdk.dynalink.linker.GuardedInvocation;
import jdk.dynalink.linker.LinkRequest;
import jdk.nashorn.internal.objects.annotations.Attribute;
import jdk.nashorn.internal.objects.annotations.Constructor;
import jdk.nashorn.internal.objects.annotations.Function;
import jdk.nashorn.internal.objects.annotations.ScriptClass;
import jdk.nashorn.internal.runtime.JSType;
import jdk.nashorn.internal.runtime.PropertyMap;
import jdk.nashorn.internal.runtime.ScriptObject;
import jdk.nashorn.internal.runtime.ScriptRuntime;
import jdk.nashorn.internal.runtime.linker.PrimitiveLookup;
/**
* ECMA 15.6 Boolean Objects.
*/
@ScriptClass("Boolean")
public final class NativeBoolean extends ScriptObject {
private final boolean value;
/** Method handle to create an object wrapper for a primitive boolean. */
static final MethodHandle WRAPFILTER = findOwnMH("wrapFilter", MH.type(NativeBoolean.class, Object.class));
/** Method handle to retrieve the Boolean prototype object. */
private static final MethodHandle PROTOFILTER = findOwnMH("protoFilter", MH.type(Object.class, Object.class));
// initialized by nasgen
private static PropertyMap $nasgenmap$;
private NativeBoolean(final boolean value, final ScriptObject proto, final PropertyMap map) {
super(proto, map);
this.value = value;
}
NativeBoolean(final boolean flag, final Global global) {
this(flag, global.getBooleanPrototype(), $nasgenmap$);
}
NativeBoolean(final boolean flag) {
this(flag, Global.instance());
}
@Override
public String safeToString() {
return "[Boolean " + toString() + "]";
}
@Override
public String toString() {
return Boolean.toString(getValue());
}
/**
* Get the value for this NativeBoolean
* @return true or false
*/
public boolean getValue() {
return booleanValue();
}
/**
* Get the value for this NativeBoolean
* @return true or false
*/
public boolean booleanValue() {
return value;
}
@Override
public String getClassName() {
return "Boolean";
}
/**
* ECMA 15.6.4.2 Boolean.prototype.toString ( )
*
* @param self self reference
* @return string representation of this boolean
*/
@Function(attributes = Attribute.NOT_ENUMERABLE)
public static String toString(final Object self) {
return getBoolean(self).toString();
}
/**
* ECMA 15.6.4.3 Boolean.prototype.valueOf ( )
*
* @param self self reference
* @return value of this boolean
*/
@Function(attributes = Attribute.NOT_ENUMERABLE)
public static boolean valueOf(final Object self) {
return getBoolean(self);
}
/**
* ECMA 15.6.2.1 new Boolean (value)
*
* @param newObj is the new operator used to instantiate this NativeBoolean
* @param self self reference
* @param value value of boolean
* @return the new NativeBoolean
*/
@Constructor(arity = 1)
public static Object constructor(final boolean newObj, final Object self, final Object value) {
final boolean flag = JSType.toBoolean(value);
if (newObj) {
return new NativeBoolean(flag);
}
return flag;
}
private static Boolean getBoolean(final Object self) {
if (self instanceof Boolean) {
return ((Boolean)self);
} else if (self instanceof NativeBoolean) {
return ((NativeBoolean)self).getValue();
} else if (self != null && self == Global.instance().getBooleanPrototype()) {
return false;
} else {
throw typeError("not.a.boolean", ScriptRuntime.safeToString(self));
}
}
/**
* Lookup the appropriate method for an invoke dynamic call.
*
* @param request The link request
* @param receiver The receiver for the call
* @return Link to be invoked at call site.
*/
public static GuardedInvocation lookupPrimitive(final LinkRequest request, final Object receiver) {
return PrimitiveLookup.lookupPrimitive(request, Boolean.class, new NativeBoolean((Boolean)receiver), WRAPFILTER, PROTOFILTER);
}
/**
* Wrap a native boolean in a NativeBoolean object.
*
* @param receiver Native boolean.
* @return Wrapped object.
*/
@SuppressWarnings("unused")
private static NativeBoolean wrapFilter(final Object receiver) {
return new NativeBoolean((Boolean)receiver);
}
@SuppressWarnings("unused")
private static Object protoFilter(final Object object) {
return Global.instance().getBooleanPrototype();
}
private static MethodHandle findOwnMH(final String name, final MethodType type) {
return MH.findStatic(MethodHandles.lookup(), NativeBoolean.class, name, type);
}
}