Code snippet for adding annotations to your Gateway Service

Now that annotations are making UI5 development easier by using Smart controls, it is important to learn how to add these annotations to your service. SEGW does not yet allow you to add most of the annotations. Till SEGW inherently provides that feature, here is how you can do it using code.

Step 1. Goto you MPC_EXT class
Step 2. Redefine Define method.
Step 3. Write this code.

  METHOD define.

    DATA: lo_entity_type TYPE REF TO /iwbep/if_mgw_odata_entity_typ,
          lo_property    TYPE REF TO /iwbep/cl_mgw_odata_property,
          lo_annotation  TYPE REF TO /iwbep/if_mgw_odata_annotation.

    super->define( ). "Ensure you call the parent metadata

    lo_entity_type = model->get_entity_type( iv_entity_name = 'SESItem'). "Your Entity Name

    lo_property ?= lo_entity_type->get_property( iv_property_name = 'Date'). "Property inside your Entity

    CALL METHOD lo_property->/iwbep/if_mgw_odata_annotatabl~create_annotation
      EXPORTING
        iv_annotation_namespace = /iwbep/if_mgw_med_odata_types=>gc_sap_namespace
      RECEIVING
        ro_annotation           = lo_annotation.

    lo_annotation->add( iv_key = 'display-format' iv_value = 'Date' ). "Specific annotation you want to add.

  ENDMETHOD.

This will result in