topic Re: Pass Table to Class Methods in Application Development and Automation Discussions

Pass Table to Class Methods

Former Member — Fri, 22 Feb 2008 14:38:08 GMT

Hi.

I want to pass the Standard and Hashed Table to Methods of CLass.

Can anyone please provide a code snippet ?

Currently it only has string as passed by value

My Class code is :



class ZCL_SHM definition
  public
  final
  create public .

public section.

    data STRING_ATTR type STRING .

Theses Statements does not work :



data z_Table type any table.

data z_Table type Hashed Table.

Re: Pass Table to Class Methods

Former Member — Fri, 22 Feb 2008 14:41:32 GMT

Please look at this example.


CLASS: c_biker DEFINITION DEFERRED,
       c_bicycle DEFINITION DEFERRED.

*-----------------------------------------------------------------------

CLASS c_team DEFINITION.
  PUBLIC SECTION.
    TYPES: biker_ref TYPE REF TO c_biker,
           biker_ref_tab TYPE STANDARD TABLE OF biker_ref
                                       WITH DEFAULT KEY,
           BEGIN OF status_line_type,
             flag(1)  TYPE c,
             text1(5) TYPE c,
             id       TYPE i,
             text2(7) TYPE c,
             text3(6) TYPE c,
             gear     TYPE i,
             text4(7) TYPE c,
             speed    TYPE i,
           END OF status_line_type.
    CLASS-METHODS: class_constructor.
    METHODS: constructor,
             create_team,
             selection,
             execution.
  PRIVATE SECTION.
    CLASS-DATA: team_members TYPE i,
                counter TYPE i.
    DATA: id TYPE i,
          status_line TYPE status_line_type,
          status_list TYPE SORTED TABLE OF status_line_type
                           WITH UNIQUE KEY id,
          biker_tab TYPE biker_ref_tab,
          biker_selection LIKE biker_tab,
          biker LIKE LINE OF biker_tab.
    METHODS: write_list.
ENDCLASS.

Edited by: Naren Someneni on Feb 22, 2008 8:43 AM

Re: Pass Table to Class Methods

Former Member — Fri, 22 Feb 2008 14:47:02 GMT

i wan to define a table so that i can store that in the public attribute by calling method and passing table to it .

????

Re: Pass Table to Class Methods

Former Member — Fri, 22 Feb 2008 15:02:05 GMT

If I understood you correctly, you want to declare a table in public section and want to populate it in a method of that class?

Re: Pass Table to Class Methods

Former Member — Fri, 22 Feb 2008 15:04:23 GMT

yes. because other programs will send the table to the method of that class as a parameter and then this method will update its instance of table type that is declared in class definition.

Re: Pass Table to Class Methods

matt — Fri, 22 Feb 2008 15:14:29 GMT

You can't use generic types in the way you want to. But there's a way round - pass references. So in your class, you want an attribute to be a table that can be any kind of table and any structure. What you do is instead have a class attribute my_table_ref TYPE REF TO DATA.

Now you need to work out how to set the class attribute my_table_ref. One way is to use a setter method, like SET_TABLE_REF, which has one importing parameter i_ref TYPE REF TO DATA. Body is me->my_table_ref = i_ref.

From the program using the class, assuming you've defined a table somewhere "t_my_table", you can set the attribute like this.

DATA: io TYPE REF TO myclass.
...
GET REFERENCE OF t_my_table INTO io->my_table_ref.

When you want to access the table within the class, you dereference to a field-symbol in the method.

FIELD-SYMBOLS: <my_table> TYPE ANY TABLE.
ASSIGN my_table_ref->* TO <my_table>.

You can then access <my_table> as you would any other dynamic table.

( Note - you can use generic table as IMPORTING and EXPORTING parameters of method. Just not as attributes or RETURNING parameters - for those, you just need to pass the reference instead ).

matt

Re: Pass Table to Class Methods

Former Member — Fri, 22 Feb 2008 15:41:19 GMT

have anyone of you worked with Shared Memory Object Classes ?

I am trying to store the table the way you have shown, its throwing a dump exception.

Re: Pass Table to Class Methods

matt — Fri, 22 Feb 2008 17:20:46 GMT

Seeing as you've said this question is answered, it's probably better to post a new one. And give details of precisely what the dump is...

regards

matt