Get Example source ABAP code based on a different SAP table
ABAP_RAP - BDEF Projection Extension, Field Extension This example demonstrates how extension fields are added and behavior-enabled in a projection BDEF extension scenario.
Original Base RAP BO DDIC data model The DDIC data model consists of one database table: DEMO_ROOT_EXT: DDIC DEMO_ROOT_EXT This database table includes structure DEMO_EXTENSION. DDIC DEMO_EXTENSION CDS data model The CDS data model consists of one root entity without child entities: DEMO_RAP_FIELD_EXT: DDLS DEMO_RAP_FIELD_EXT Behavior definition The RAP behavior definition DEMO_RAP_FIELD_EXT is defined in RAP BDL as shown below. It defines global authorization control and adds field attributes to several fields. BDEF DEMO_RAP_FIELD_EXT Behavior implementation For the RAP behavior definition, one ABAP behavior pool (ABP) is created. The global class of the behavior pool is BP_DEMO_RAP_FIELD_EXT, see BP_DEMO_RAP_FIELD_EXT=========CCIMP. This global class implements two methods:
get_instance_features: Implements dynamic feature control for field DataField: If field CharField has value A, then field DataField is read-only. If field CharField has any other value, then field DataField can be accessed without any restrictions.
get_global_auth: Defines global feature control for the complete RAP BO: Update requests are generally authorized and delete requests are generally unauthorized.
Extension RAP BO DDIC data model extension Extension fields are added to the DDIC data model via the structure extension DEMO_EXTEND_STR: DDIC DEMO_EXTEND_STR CDS data model extension The extension fields are added to the CDS data model via the CDS view entity extension DEMO_EXTENSION_RAP_BO : DDLS DEMO_EXTENSION_RAP_BO BDEF extension The BDEF extension DEMO_EXTENSION_RAP_BO adds field attributes to the extension fields. BDEF DEMO_EXTENSION_RAP_BO ABP extension The ABP extension is implemented in the global class BP_DEMO_EXTENSION_RAP_BO, see BP_DEMO_EXTENSION_RAP_BO======CCIMP. This global class implements dynamic feature control for the extension field NumFieldExt: If the value of field IntFieldExt is greater than 1000, then field NumFieldExt is read-only. If the value of field IntFieldExt is less than or equal to 1000, access to field NumFieldExt is unrestricted.
Projection Layer Data model projection The projection view DEMO_RAP_PROJ_EXT_FIELD projects the root node: DDLS DEMO_RAP_PROJ_EXT_FIELD View entity extension The CDS view entity extension DEMO_RAP_PV_EX extends the original CDS projection view. It includes the extension fields in the projection layer. DDLS DEMO_RAP_PV_EX Behavior projection The RAP projection behavior definition DEMO_RAP_PROJ_EXT_FIELD projects the base BDEF. BDEF DEMO_RAP_PROJ_EXT_FIELD BDEF projection extension The BDEF projection extension DEMO_RAP_PROJ_BDEF_EXT extends the projection behavior definition. Its adds field attributes to the extension fields. BDEF DEMO_RAP_PROJ_BDEF_EXT
ABAP_SOURCE_CODE DEMO CL_DEMO_RAP_PROJ_EXT_FIELD
ABAP_DESCRIPTION Access with ABAP using EML The source code above uses ABAP EML to access the RAP business object from an ABAP class:
It inserts two entity instances using MODIFY ENTITIES CREATE.
It updates both entity instances using MODIFY ENTITIES UPDATE. Field attributes from the original base BO, from the projection BO, and from the extensions are respected. Fields declared as read-only on any layer must not be updated. CharFieldExt is not available in the derived types, since it has been suppressed.
