BOR Types and ABAP Classes

[Bibby, David]

Thanks Peter, I have tried instantiating the superclass by calling the superclasses constructor method inside my subclasses constructor method but I get the same error.

-----Original Message-----
From: sap-wug-bounces at mit.edu [mailto:sap-wug-bounces at mit.edu]On Behalf Of Peter Carroll
Sent: 13 June 2005 01:12
To: 'SAP Workflow Users' Group'
Subject: RE: BOR Types and ABAP Classes


David,
            ABAP objects are much easier to use than the BOR. They are, however, a bit diferent in that they are alomost OO in nature. The Create private error simply means that the Superclass has a method to create itself. This is a mechanism to control the creation of classes. You will find that the superclass will have a method to allow creation. Simply call this method and it will return, most likely, a reference to the object you need.
 
As for the private attributes - well they are private to the superclass and you cannot use them. You should really not need to if the superclass has been designed correctly - you will probably find that they can be accessed via methods. If you copy the class you can change anything but this is more than likely not the way to go.
 
Regards Peter Carroll

-----Original Message-----
From: sap-wug-bounces at mit.edu [mailto:sap-wug-bounces at mit.edu] On Behalf Of Bibby, David
Sent: Friday, 10 June 2005 23:36
To: SAP Workflow Users' Group
Subject: BOR Types and ABAP Classes



Hello All, 
I've never used workflows with ABAP classes before but I am currently implementing a SAP standard workflow that uses just such a thing.

However I need to make changes to this class. 
I have created a subclass and defined it's superclass as the one the workflow uses. 
However, as the attributes of the superclass are Private they seem to be unavailable to my subclass. 

Also when I try to activate my subclass I get the error 
"The superclass has the property 'CREATE PRIVATE'. You cannot create an 
instance of the subclass. This can only be changed if the subclass is a         
friend of the superclass.       "       

Making the subclass a friend of the superclass would be making a SAP modification. 

As there appears to be no delegation like there are with BOR Types, how are we supposed to use/extend standard SAP ABAP Classes ?

Many Thanks 
David 

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