Re : Dynamic instanciation

Question

Manuel,
The only way to do a dynamic insantiation of a class using a string is to
use dynamic libraries in R3. You will probably also need to create a Forte
interface for the object you want to instantiate. Here is an example to
get an idea:
myClassName : string = 'MyClass';
aLib : Library = task.part.findLibrary(...);
aType = aLib.FindClass(className = myClassName);
myObject : MyClassInterface = MyClassInterface(aType.InstanceAlloc());
Hope this helps,
Dustin Breese
Supervising Technical Consultant
Per-Se Technologies
From: DEVEAUX Manuel [SMTP:[email protected]]
Sent: 16 February 1998 17:56
To: 'Forte-Users'
Subject: Dynamic instanciation
Hello Forte Users !
A simple problem (I hope).
I have a name of a class (string) and I want to do a dynamic
instanciation of this class.
I tried to use ClassType.InstanceAlloc() but the attribute Name of
ClassType seems to be not settable. So it doesn't work.
Ex :
MyClassName : String = 'MyClass';
CT : ClassType = new(Name = MyClassName);
CT.InstanceAlloc();
Is there another way of doing dynamic instanciations ?
Bye.
- - Manuel -

Answer 1

Here is a correction which works :
CT : ClassType = MyClass;
CT.InstanceAlloc();
The classtype has to be from your partition. So if you want to ask and
instance
from outsite you should use a case :
aResult : Object;
Case MyClassCode is
When 1 do
CT = MyClass1
aResult = CT.instanceAlloc();
When 2 do
CT = MyClass2
aResult = CT.instanceAlloc();
End case;
Hope this helps.
Daniel Nguyen
DEVEAUX Manuel wrote:
>
Hello Forte Users !
A simple problem (I hope).
I have a name of a class (string) and I want to do a dynamic
instanciation of this class.
I tried to use ClassType.InstanceAlloc() but the attribute Name of
ClassType seems to be not settable. So it doesn't work.
Ex :
MyClassName : String = 'MyClass';
CT : ClassType = new(Name = MyClassName);
CT.InstanceAlloc();
Is there another way of doing dynamic instanciations ?
Bye.
- Manuel -
Manuel Deveaux
Forte Developer
Previade
FRANCE
E-Mail : [email protected]