public static object NewInstance(VAL val, object[] args)
{
object instance = HostType.NewInstance(val.Class, args);
Val2Host(val, instance);
return(instance);
}
/*
*
* .net object format/protocol:
*
* (1) new className(args,...)
* 如 new System.Windows.Form.TextBox()
* new Tie.VAL(20)
*
*
* (2) new SerializedObject(string className, string value.ToString(), string SerializedValue);
* 请看Encode()生成的格式
*
* 例如:
* 前提:
* System.Windows.Form.Label的值是Type, 已经用Register函数登记在数据字典Computer.DS中.
*
* 求:
* new System.Windows.Form.Label(); 转化为 new Label(System.Window.Form);
*
* */
public static VAL Decode(string className, VAL args, VAL scope, Context context)
{
VAL clss = new VAL();
/*
* 如果是注册过的class, 那么它的namespace是定义在Computer.DS中
* 譬如
* A= new NS.CLSS();
* scope[className] --> clss;
*
* 如果没有定义namespace,那么直接到Computer.DS中去取值
* 譬如
* A= CLSS();
* Computer.DS[className] --> clss
*
* */
clss = scope[className];
if (clss.Undefined)
{
clss = context.GetVAL(className, true); //如果没有找到val.Class, context.GetVAL(...)返回new VAL()
}
//返回注册过的class名字
if (clss.Defined && clss.value is Type)
{
Type type = (Type)clss.value;
object instance = Activator.CreateInstance(type, ConstructorArguments(args));
return(VAL.Boxing1(instance)); //返回实例
}
//throw new RuntimeException(string.Format("class [{0}]has not registered yet.", scope.name + "." + val.Class));
//如果没有注册过
if (scope.name != null)
{
object instance = HostType.NewInstance(scope.name + "." + className, ConstructorArguments(args));
if (instance != null)
{
//把HostType类型注册到CPU.DS2中去
VAL hostType = VAL.NewHostType(instance.GetType());
scope[className] = hostType;
return(VAL.Boxing1(instance)); //返回实例
}
}
if (clss.IsNull)
{
throw new HostTypeException("class {0} is not defined.", className);
}
if (clss.value != null)
{
Type type;
if (clss.value is Type)
{
type = (Type)clss.value;
}
else
{
type = clss.value.GetType();
}
object instance = Activator.CreateInstance(type, ConstructorArguments(args));
return(VAL.NewHostType(instance));
}
return(args);
}
