public Object construct(JSFunction function, Object... args) {
if (!function.isConstructor()) {
throw new ThrowException(this, createTypeError("not a constructor"));
}
// 13.2.2
// 1. create the new object
JSObject obj = function.createNewObject(this);
// 2. set internal methods per 8.12 [DynObject]
// 3. set class name [DynObject subclass (defaults true)]
// 4. Set Extensible [DynObject subclass (defaults true)]
// 5. Get the function's prototype
// 6. If prototype is an object make that the new object's prototype
// 7. If prototype is not an object set to the standard builtin object prototype 15.2.4
// [AbstractJavascriptFunction]
// [AbstractJavascriptFunction] handles #7, subclasses may handle #6 if necessary (see
// BuiltinArray#createNewObject)
Object p = function.get(this, "prototype");
if (p != Types.UNDEFINED && p instanceof JSObject) {
obj.setPrototype((JSObject) p);
} else {
JSObject defaultObjectProto = getPrototypeFor("Object");
obj.setPrototype(defaultObjectProto);
}
// 8. Call the function with obj as self
Object result = internalCall(null, function, obj, args);
// 9. If result is a JSObject return it
if (result instanceof JSObject) {
return (JSObject) result;
}
// Otherwise return obj
return obj;
}
