Enhancement using BAdIs

As of release 7.0, BAdIs can be created in the Enhancement Builder as a part of the enhancement concept of the ABAP Workbench. These BAdIs, together with their calling points in ABAP programs, form explicit enhancement options of these programs are assigned to enhancement spots.

If BAdIs and their calling points have been defined in a system, enhancements can be made in follow-on systems by creating BAdI implementations in these systems. A BAdI mainly consists of a BAdI implementation class, whose instances functionally enhance an ABAP program at runtime in the form of an object plug-in. Within the enhancement concept, a BAdI implementation is an enhancement implementation element and is administrated by enhancement implementations.

A BAdI primarily consists of a BAdI interface that contains the declaration of BAdI methods and of a set of filters. The filters enable certain BAdI implementations to be selected for use. In the definition of a BAdI, in addition to the selection of the BAdI interface and the definition of filters, the following settings can be made:

• Whether a BAdI is intended for single or multiple use. If a BAdI is intended for single use, only a single BAdI implementation can be used in one internal session, and one BAdI implementation must be available for each use.

• A standard BAdI implementation class can be specified that is used if no BAdI implementation is found to match the filter conditions.

• A BAdI can be defined as context-free or context-dependent. This setting controls the instantiation of the object plug-ins. In context-free BAdIs, it is possible to define whether an object plug-in can be generated only once or several times within an internal session. For context-dependent BAdIs, the object plug-ins are linked with a context object.

In contrast to previous BAdIs, the new BAdIs are supported directly by the ABAP runtime environment with the following ABAP statements:

• GET BADI
  
  Generation of a BAdI object as a Handle for object plug-ins.
  

• CALL BADI
  
  Call of BAdI methods in object plug-ins.

The BAdIs of the enhancement concept are also freely switchable using switches of the Switch Framework.

Notes

• For a BAdI that is intended for single use, it is recommended to always enter a standard implementation class and to implement it in the same system as the BAdI.

• See also Enhancements with BAdIs.