BOR Types and ABAP Classes

[Alon Raskin]

Guys,

 

Most likely you can not instantiate either class because they are
probably both marked as Create Private. There is most likely a static
method that will return an instance of the class. Its probably called
something like 'GetInstance', 'Open' or even 'Select'... sniff around
the class methods you will find it.

 

Alon Raskin

e: araskin at 3i-consulting.com <mailto:araskin at 3i-consulting.com> 

w: http://www.3i-consulting.com <http://www.3i-consulting.com/> 

________________________________

From: sap-wug-bounces at mit.edu [mailto:sap-wug-bounces at mit.edu] On Behalf
Of Bibby, David
Sent: Monday, June 13, 2005 5:38 AM
To: SAP Workflow Users' Group
Subject: RE: BOR Types and ABAP Classes

 

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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