Use case wrappers with data
Use case wrappers allow defining reusable building blocks with a standard implementation and polymorphism to override the default behavior.
A use case wrapper may define a prototype, a virtual application prototype, a method definition or a virtual application.
- COOSYSTEM@1.1:ucwprototype
- FSCVAPP@1.1001:ucwprototype
- COOSYSTEM@1.1:ucwmethdefinition
- FSCVAPP@1.1001:ucwapplication
- Cloud profile note: The definition of use case wrappers is not allowed.
Example |
app.ducx Use Case Language /**
* Default implementation for signature wrappers. If no selection is supplied,
* it is applied to “sys_object”. If “signtype” is not available for any
* reason, an exception is thrown.
*/
usecase SignObjects(parameters as FSCVAPP@1.1001:MenuPrototype) {
variant Object {
application {
expression {
if (!sys_selobjects) {
sys_selobjects = sys_object;
}
Action sys_action;
SignatureType signtype = sys_action.signtype;
if (!signtype) {
throw #SIGNERR_IllegalType;
}
->SignSelectedObjectsApp(sys_object, sys_action, sys_view,
sys_selobjects, sys_selindices, sys_dynkey, signtype, null);
}
}
}
} app.ducx Object Model Language /**
* Defines a signature wrapper with a default virtual application
* implementation (“SignObjects”).
*/
class<UseCaseWrapper> SignatureWrapper : UseCase {
ucwapplication = ObjectSignObjects;
SignatureType signtype not null;
} app.ducx Use Case Language /**
* “SignWithMenuInitial” creates a menu use case; it is implemented as
* virtual application defined in “SignatureWrapper”
*/ menu usecase<SignatureWrapper> SignWithMenuInitial {
signtype = SIGN_INITIAL;
} |
