A global internal table - retaing values of internal table

Question

Hi,
I needed some help in the creation of a internal table whose content don't change in the recursive call to the method.
I call a method  M1 which returns me an standard internal table (i1) as an import parameter and has two export parameters ( exp_p1,exp_p2).
I call this method(m1) recursively in the method m1 itself. I find that when i call this mehtod m1 , second time the data that was there in the internal table M1 on first call of the method is cleared out.
what shoudl i do , so that i can to reatin the the value of the internal table.
Like for example , i have one record in the internal table in the first call to the method M1 and before the second call of method is made.
Once the call to method M1 is made ( meaning to say a second call is made) ,the internal table contains zero records.
while creating the internal table i use a the append keyword to add rows in the method.
In Programming language 'C', for recursion function , if any variable is made as static, that variable retains it value during successive calls to the function.I am looking for something similar to it.
Regards,
Om

Answer 1

Use a static class. 
report zrich_0002.
*       CLASS lcl_app DEFINITION
class lcl_app definition.
  public section.
    <b>class-data:</b> it001 type table of t001.
    <b>class-data:</b> xt001 type t001.
    <b>class-methods:</b> get_data,
                   write_data.
endclass.
start-of-selection.
  call method lcl_app=>get_data.
  do 2 times.
    call method lcl_app=>write_data.
    skip 1.
  enddo.
*       CLASS lcl_app IMPLEMENTATION
class lcl_app implementation.
  method get_data.
    select * into table it001 from t001.
  endmethod.
  method write_data.
    loop at it001 into xt001.
      write:/ xt001-bukrs, xt001-butxt.
    endloop..
  endmethod.
endclass.
REgards,
Rich Heilman