topic dynamic class loading and abap_parmbind in Application Development and Automation Discussions

dynamic class loading and abap_parmbind

Former Member — Mon, 07 Jun 2004 13:58:09 GMT

Hello,

I am using dynamic class loading with a

CREATE OBJECT obj TYPE (<classname>)

PARAMETER-TABLE <param_table>

statement. The objects I am trying to create have a constructor which expect a parameter called 'model' of type ref to cl_bsp_model, i.e. a simple object reference.

Now, as the structure of the parameter table is abap_parmbind, the value of a parameter needs to be of type ref to data - that is not a object reference.

How can I transfer my model object now to the class' constructor?

To put it more general: how can one transfer constructor parameters in dynamic class loading, when the parameters are not simple types (but references)?

Regards,

Sebastian Kamp

Re: dynamic class loading and abap_parmbind

Former Member — Wed, 09 Jun 2004 17:44:58 GMT

Hello Sebastian,

You can take the reference of the object to a data reference variable using command GET REFERENCE OF lv_object_ref INTO lv_data_ref.You can find a small program as an example below.I hope it helps.

REPORT YREF_TEST.

TYPE-POOLS: abap.

DATA: ls_parmbind TYPE abap_parmbind,

lt_parmbind LIKE HASHED TABLE OF ls_parmbind

WITH UNIQUE KEY name.

*----

CLASS lcl_test DEFINITION

*----

CLASS lcl_test DEFINITION.

PUBLIC SECTION.

DATA: av_int TYPE i VALUE 4 READ-ONLY.

ENDCLASS. "lcl_test DEFINITION

*----

CLASS lcl_main DEFINITION

*----

CLASS lcl_main DEFINITION.

PUBLIC SECTION.

METHODS: constructor

IMPORTING iv_obj TYPE REF TO lcl_test.

DATA: av_main_int TYPE i.

ENDCLASS. "lcl_main DEFINITION

*----

CLASS lcl_main IMPLEMENTATION

*----

CLASS lcl_main IMPLEMENTATION.

METHOD constructor.

av_main_int = iv_obj->av_int.

write av_main_int.

ENDMETHOD. "constructor

ENDCLASS. "lcl_main IMPLEMENTATION

START-OF-SELECTION.

DATA: lv_dref TYPE REF TO data.

DATA: lv_objref TYPE REF TO lcl_test,

lv_obj_dynref TYPE REF TO object,

lv_class_name TYPE string.

CREATE OBJECT lv_objref.

GET REFERENCE OF lv_objref INTO lv_dref.

lv_class_name = 'LCL_MAIN'.

ls_parmbind-name = 'IV_OBJ'.

ls_parmbind-kind = 'E'.

ls_parmbind-value = lv_dref.

INSERT ls_parmbind INTO TABLE lt_parmbind.

CREATE OBJECT lv_obj_dynref TYPE (lv_class_name)

PARAMETER-TABLE lt_parmbind .

Regards,

Sükrü

Re: dynamic class loading and abap_parmbind

Former Member — Thu, 10 Jun 2004 11:54:17 GMT

Hello Sükrü,

thanks for your answer. I had tested a variant of your solution, but it did not work and I think I know why.

The GET REFERENCE OF command will return a data reference to the variable - regardless of the type of this variable. If the variable is an object reference itself, the GET REFERENCE will return a data reference to this reference and not the actual object.

Regards,

Sebastian

Re: dynamic class loading and abap_parmbind

Vani_SR — Mon, 07 Oct 2024 17:06:30 GMT

Hello Sukru,

Could you please tell me what exactly the kind 'E' refers to in this,

ls_parmbind-kind = 'E'.