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/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/scripting/mozjs/maxkey.h"
#include "mongo/scripting/mozjs/implscope.h"
#include "mongo/scripting/mozjs/objectwrapper.h"
#include "mongo/scripting/mozjs/valuereader.h"
namespace mongo {
namespace mozjs {
const JSFunctionSpec MaxKeyInfo::methods[2] = {
MONGO_ATTACH_JS_FUNCTION(tojson), JS_FS_END,
};
const char* const MaxKeyInfo::className = "MaxKey";
namespace {
const char* const kSingleton = "singleton";
} // namespace
void MaxKeyInfo::construct(JSContext* cx, JS::CallArgs args) {
call(cx, args);
}
/**
* The idea here is that MinKey and MaxKey are singleton callable objects that
* return the singleton when called. This enables all instances to compare
* == and === to MinKey even if created by "new MinKey()" in JS.
*/
void MaxKeyInfo::call(JSContext* cx, JS::CallArgs args) {
auto scope = getScope(cx);
ObjectWrapper o(cx, scope->getMaxKeyProto().getProto());
JS::RootedValue val(cx);
if (!o.hasField(kSingleton)) {
JS::RootedObject thisv(cx);
scope->getMaxKeyProto().newObject(&thisv);
val.setObjectOrNull(thisv);
o.setValue(kSingleton, val);
} else {
o.getValue(kSingleton, &val);
}
args.rval().setObjectOrNull(val.toObjectOrNull());
}
void MaxKeyInfo::Functions::tojson(JSContext* cx, JS::CallArgs args) {
ValueReader(cx, args.rval()).fromStringData("{ \"$maxKey\" : 1 }");
}
void MaxKeyInfo::postInstall(JSContext* cx, JS::HandleObject global, JS::HandleObject proto) {
ObjectWrapper protoWrapper(cx, proto);
JS::RootedValue value(cx);
getScope(cx)->getMaxKeyProto().newObject(&value);
ObjectWrapper(cx, global).setValue("MaxKey", value);
protoWrapper.setValue(kSingleton, value);
}
} // namespace mozjs
} // namespace mongo
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