topic Re: Creating a variable of specified type dynamically in Application Development and Automation Discussions

Creating a variable of specified type dynamically

raghavendra_subhash — Fri, 02 Feb 2007 10:22:46 GMT

Hi,

I have requirement where in I need to return a variable of specified data type either through a method or function call.

DATA: var_typ type char30 value 'I',

var_val type char30 value '123'.

To create a generic function or method which would return a variable of type 'I' with value '123', taking the var_typ and var_val as input parameter.

This is just an example, actual I have a internal table with multiple records and each record has a different data type, for each record a different variable needs to be created i.e. variable should be a return type and not a exporting type.

More information about the requirement

Invoke methods dynamically.

Given:

1) You have a table with 2 fields (data type and value)

2) You have the class name and the method name (assume that method has one importing parameter).

3) Not to declare a variable of type importing or exporting in the program.

Information already gathered.

1) Knows how to create objects dynamically (CREATE OBJECT obj_add TYPE (class_name)).

2) Knows how to invoke a method dynamically (CALL METHOD obj_add->(method_name) PARAMETER-TABLE ptab).

It would be helpful if you can provide the piece of code or guide me on how this can be implemented in ABAP.

Thanks,

Raghavendra

Re: Creating a variable of specified type dynamically

Former Member — Fri, 02 Feb 2007 10:30:05 GMT

Why dont you use a field symbol

e.g FIELD-SYMBOLS : value type any.

You can assign any value to this variable.

Check this link for more information.

http://help.sap.com/saphelp_47x200/helpdata/en/fc/eb3860358411d1829f0000e829fbfe/frameset.htm

Re: Creating a variable of specified type dynamically

Former Member — Fri, 02 Feb 2007 10:54:45 GMT

DATA:

ref_itab TYPE REF TO data,

ref_wa TYPE REF TO data.

FIELD-SYMBOLS:

<fs_itab> TYPE ANY TABLE,

<fs_wa> TYPE ANY,

<fs_comp> TYPE ANY.

PARAMETERS:

pa_tab TYPE dd02l-tabname.

Start-of-Selection.

CREATE DATA ref_itab TYPE STANDARD TABLE OF (pa_tab) WITH NON-UNIQUE DEFAULT KEY.

ASSIGN ref_itab->* to <fs_itab>.

SELECT * FROM (pa_tab) INTO TABLE <fs_itab>.

CREATE DATA ref_wa LIKE LINE OF <fs_itab>.

ASSIGN ref_wa to <fs_wa>

LOOP AT <fs_itab> into <fs_wa>.

DO.

ASSIGN COMPONENT sy-index OF STRUCTURE <fs_wa> TO <fs_comp>.

IF sy-subrc NE 0.

NEW-LINE.

EXIT.

ENDIF.

WRITE <fs_comp>.

ENDDO.

ENDLOOP.

Re: Creating a variable of specified type dynamically

raghavendra_subhash — Fri, 02 Feb 2007 11:35:10 GMT

Hi,

Thanks for quick responce. I tried using the field symbols, but was not possible. I pasted a sinp of the code that actual work i.e. without using the field symbol.

DATA: ptab type abap_parmbind_tab,

ptab_line TYPE abap_parmbind.

DATA: class_name type CHAR30 VALUE 'ZCL_ADD,

method_name type CHAR30 VALUE 'ADD'.

DATA: obj type ref to OBJECT.

DATA: IV_var1 TYPE I.

DATA: IV_var2 TYPE I.

DATA: EV_OUT TYPE I.

IV_var1 = 1.

IV_var2 = 2.

EV_OUT = 0.

create object obj type (class_name).

ptab_line-name = 'IV_var1'.

ptab_line-kind = CL_ABAP_OBJECTDESCR=>EXPORTING.

GET REFERENCE OF IV_var1 INTO ptab_line-value.

INSERT ptab_line into table ptab.

ptab_line-name = 'IV_var2'.

ptab_line-kind = CL_ABAP_OBJECTDESCR=>EXPORTING.

GET REFERENCE OF IV_var2 INTO ptab_line-value.

INSERT ptab_line into table ptab.

ptab_line-name = 'EV_out'.

ptab_line-kind = CL_ABAP_OBJECTDESCR=>IMPORTING.

GET REFERENCE OF EV_out INTO ptab_line-value.

INSERT ptab_line into table ptab.

*Then you can use

CALL METHOD obj->(method_name) PARAMETER-TABLE ptab.

WRITE: 'this test program'.

WRITE: EV_out.

Here I have declared a variables (iv_var1, iv_var2, ev_out) of the method ADD. Instead of declaring the variable, I need a generic function which can read from data from the table and return me variable with value., so that I can insert it to the ptab.

Thanks,

Raghavendra