Is there dedicated DDIC structure generated for each CDS entity
作者：互联网
Xiumei has already made a good analysis on what artifacts will be automatically generated when a CDS view is activated, see her research here:
And Xiumei raised a question: is there dedicated DDIC structure generated for each CDS entity during view activation?
Answer is NO. Even if you publish your CDS view into a odata service, there is still not DDIC structure generated for OData metadata model. Instead, transient structure are generated for each entity. You can execute and debug this report ZCDS_GET_METADATA_BY_SRV_NAME in AG3/001 to study yourself:
By default I use the Odata service developed for smart template POC this March. You can replace it with your own Odata service.
Execute report, check mt_entities to get a understanding about generated entity type:
And for step how to publish your CDS view into OData service, you can simply create a project in SEGW and include your CDS view as a reference.
I just attach the source code of report in case any one is interested in the implementation detail.
REPORT zcds_get_metadata_by_srv_name.
PARAMETERS: srv_name TYPE string OBLIGATORY DEFAULT 'ZSERVICE_POC_SRV'.
DATA(lo_tool) = NEW zcl_sadl_tool( ).
TRY.
DATA(ro_meta_model) = CAST /IWBEP/CL_MGW_ODATA_MODEL( lo_tool->get_metadata_by_srv_name( srv_name ) ).
CATCH cx_root INTO DATA(cx_root).
WRITE: / 'Metadata retrieve failed: ' , cx_root->get_text( ).
RETURN.
ENDTRY.
CHECK ro_meta_model->mt_entities IS NOT INITIAL.
BREAK-POINT.
class ZCL_SADL_TOOL definition
public
final
create public .
public section.
methods GET_METADATA_BY_SRV_NAME
importing
!IV_SRV_NAME type STRING
returning
value(RO_META_MODEL) type ref to /IWBEP/IF_MGW_ODATA_RE_MODEL .
methods GET_VIEW_CONSUMPTION_INFO
importing
!IV_VIEW_NAME type STRING
returning
value(RO_INFO) type IF_SADL_ENTITY_CONSUMP_INFO=>TY_CONSUMPTION_INFORMATION .
methods GET_VIEW_ENTITIES
importing
!IV_VIEW_NAME type STRING
returning
value(RT_ENTITIES) type IF_SADL_ENTITY=>TT_ENTITIES .
methods GET_MODEL_BY_SRV_NAME
importing
!IV_SRV_NAME type /IWBEP/MED_GRP_TECHNICAL_NAME
exporting
!ET_OBJECT_MODELS type /IWBEP/T_OBJECT_MODEL
!ET_MSG_CONTAINER type /IWBEP/T_MESSAGE_CONTAINER
!ES_MSG_CONTAINER_H type /IWBEP/S_MESSAGE_CONTAINER_H
!ES_MODEL_USAGE type /IWBEP/S_MED_MDL_USAGE .
methods GET_LAST_MODIFIED
importing
!IV_VIEW_NAME type STRING
returning
value(RV_LAST_MODIFIED) type TIMESTAMP .
methods GET_SADL_DEFINITION
importing
!IV_VIEW_NAME type STRING
returning
value(RS_SADL_DEFINITION) type IF_SADL_TYPES=>TY_SADL_DEFINITION .
protected section.
private section.
methods GET_MP_BY_VIEW_NAME
importing
!IV_VIEW_NAME type STRING
returning
value(RO_MP) type ref to CL_SADL_MP_ENTITY_EXPOSURE .
ENDCLASS.
CLASS ZCL_SADL_TOOL IMPLEMENTATION.
* <SIGNATURE>---------------------------------------------------------------------------------------+
* | Instance Public Method ZCL_SADL_TOOL->GET_LAST_MODIFIED
* +-------------------------------------------------------------------------------------------------+
* | [--->] IV_VIEW_NAME TYPE STRING
* | [<-()] RV_LAST_MODIFIED TYPE TIMESTAMP
* +--------------------------------------------------------------------------------------</SIGNATURE>
METHOD get_last_modified.
DATA lt_paths TYPE string_table.
DATA(lv_path) = 'CDS~' && iv_view_name.
APPEND lv_path TO lt_paths.
DATA: lo_mp TYPE REF TO cl_sadl_mp_entity_exposure.
lo_mp = CAST #( NEW cl_sadl_mp_entity_exposure( it_paths = lt_paths
iv_timestamp = 20160319014636 iv_expose_associations = abap_true ) ).
cl_sadl_entity_mp_registry=>register_mp( lo_mp ).
rv_last_modified = cl_sadl_entity_load_handler=>get_latest_timestamp( lo_mp ).
ENDMETHOD.
* <SIGNATURE>---------------------------------------------------------------------------------------+
* | Instance Public Method ZCL_SADL_TOOL->GET_METADATA_BY_SRV_NAME
* +-------------------------------------------------------------------------------------------------+
* | [--->] IV_SRV_NAME TYPE STRING
* | [<-()] RO_META_MODEL TYPE REF TO /IWBEP/IF_MGW_ODATA_RE_MODEL
* +--------------------------------------------------------------------------------------</SIGNATURE>
method GET_METADATA_BY_SRV_NAME.
data(lo_metadata_provider) = /iwbep/cl_mgw_med_provider=>get_med_provider( ).
ro_meta_model ?= lo_metadata_provider->get_service_metadata(
iv_internal_service_name = conv #( iv_srv_name )
iv_internal_service_version = '0001'
).
endmethod.
* <SIGNATURE>---------------------------------------------------------------------------------------+
* | Instance Public Method ZCL_SADL_TOOL->GET_MODEL_BY_SRV_NAME
* +-------------------------------------------------------------------------------------------------+
* | [--->] IV_SRV_NAME TYPE /IWBEP/MED_GRP_TECHNICAL_NAME
* | [<---] ET_OBJECT_MODELS TYPE /IWBEP/T_OBJECT_MODEL
* | [<---] ET_MSG_CONTAINER TYPE /IWBEP/T_MESSAGE_CONTAINER
* | [<---] ES_MSG_CONTAINER_H TYPE /IWBEP/S_MESSAGE_CONTAINER_H
* | [<---] ES_MODEL_USAGE TYPE /IWBEP/S_MED_MDL_USAGE
* +--------------------------------------------------------------------------------------</SIGNATURE>
method GET_MODEL_BY_SRV_NAME.
CALL FUNCTION '/IWBEP/FM_MGW_GET_OBJ_MODELS'
EXPORTING
IV_LANGUAGE = 'E'
IV_SERVICE_GROUP_NAME = iv_srv_name
IV_SERVICE_GROUP_VERSION = '0001'
"IV_CONTEXT =
IV_INCLUDE_MODEL_USAGE = 'X'
IMPORTING
RT_OBJECT_MODELS = eT_OBJECT_MODELS
ET_MSG_CONTAINER = ET_MSG_CONTAINER
ES_MSG_CONTAINER_H = ES_MSG_CONTAINER_H
ES_MODEL_USAGE = ES_MODEL_USAGE.
.
endmethod.
* <SIGNATURE>---------------------------------------------------------------------------------------+
* | Instance Private Method ZCL_SADL_TOOL->GET_MP_BY_VIEW_NAME
* +-------------------------------------------------------------------------------------------------+
* | [--->] IV_VIEW_NAME TYPE STRING
* | [<-()] RO_MP TYPE REF TO CL_SADL_MP_ENTITY_EXPOSURE
* +--------------------------------------------------------------------------------------</SIGNATURE>
method GET_MP_BY_VIEW_NAME.
DATA: lt_paths TYPE string_table.
" APPEND | { `CDS~Z_C_Service_Order_View` CASE = UPPER }| TO lt_paths.
APPEND |{ `CDS~` && iv_view_name case = upper }| TO lt_paths.
DATA: lo_mp TYPE REF TO cl_sadl_mp_entity_exposure.
lo_mp = CAST #( NEW cl_sadl_mp_entity_exposure( it_paths = lt_paths
"iv_timestamp = 20160319014636
iv_expose_associations = abap_true ) ).
ro_mp = lo_mp.
endmethod.
* <SIGNATURE>---------------------------------------------------------------------------------------+
* | Instance Public Method ZCL_SADL_TOOL->GET_SADL_DEFINITION
* +-------------------------------------------------------------------------------------------------+
* | [--->] IV_VIEW_NAME TYPE STRING
* | [<-()] RS_SADL_DEFINITION TYPE IF_SADL_TYPES=>TY_SADL_DEFINITION
* +--------------------------------------------------------------------------------------</SIGNATURE>
method GET_SADL_DEFINITION.
DATA: lt_paths TYPE string_table,
lo_Context TYPE REF TO IF_BSA_SADL_MP_CONTEXT.
DATA: ls_sadl_definition_orig TYPE if_sadl_types=>ty_sadl_definition.
" APPEND | { `CDS~Z_C_Service_Order_View` CASE = UPPER }| TO lt_paths.
APPEND |{ `CDS~` && iv_view_name case = upper }| TO lt_paths.
DATA: lo_mp TYPE REF TO cl_sadl_mp_entity_exposure.
lo_mp = CAST #( NEW cl_sadl_mp_entity_exposure( it_paths = lt_paths
"iv_timestamp = 20160319014636
iv_expose_associations = abap_true ) ).
"cl_sadl_entity_mp_registry=>register_mp( lo_mp ).
lo_context ?= lo_mp.
lo_context->get_sadl_definition( IMPORTING
es_sadl_definition = rs_sadl_definition ).
"DATA(rv_last_modified) = cl_sadl_entity_load_handler=>get_latest_timestamp( lo_mp ).
endmethod.
* <SIGNATURE>---------------------------------------------------------------------------------------+
* | Instance Public Method ZCL_SADL_TOOL->GET_VIEW_CONSUMPTION_INFO
* +-------------------------------------------------------------------------------------------------+
* | [--->] IV_VIEW_NAME TYPE STRING
* | [<-()] RO_INFO TYPE IF_SADL_ENTITY_CONSUMP_INFO=>TY_CONSUMPTION_INFORMATION
* +--------------------------------------------------------------------------------------</SIGNATURE>
METHOD get_view_consumption_info.
ro_info = cl_sadl_entity_factory=>get_instance(
)->get_entity_consumption_info( iv_id = CONV #( iv_view_name )
iv_type = 'CDS' )->get_consumption_information( ).
ENDMETHOD.
* <SIGNATURE>---------------------------------------------------------------------------------------+
* | Instance Public Method ZCL_SADL_TOOL->GET_VIEW_ENTITIES
* +-------------------------------------------------------------------------------------------------+
* | [--->] IV_VIEW_NAME TYPE STRING
* | [<-()] RT_ENTITIES TYPE IF_SADL_ENTITY=>TT_ENTITIES
* +--------------------------------------------------------------------------------------</SIGNATURE>
method GET_VIEW_ENTITIES.
data(lo_mp) = GET_MP_BY_VIEW_NAME( iv_view_name ).
data(lo_common_runtime) = NEW cl_sadl_gw_odata_runtime( ).
data(lo_sadl_api) = cl_sadl_entity_api_factory=>create( CAST #( lo_mp ) ).
CALL METHOD lo_sadl_api->get_entities
IMPORTING
et_entities = rt_entities.
endmethod.
ENDCLASS.
要获取更多Jerry的原创文章，请关注公众号"汪子熙":
标签：dedicated,NAME,GET,lo,there,sadl,mp,CDS,SADL 来源： https://blog.csdn.net/i042416/article/details/100044443