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CALL METHOD

Short Reference

Other versions: 7.31 | 7.40 | 7.54

Syntax

CALL METHOD dynamic_meth { parameter_list 

              
          | parameter_tables }. 

Effect

This statement calls the method dynamically specified in dynamic_meth(Dynamic Invoke). Actual parameters are assigned to formal parameters of the method, either statically using parameter_list or dynamically using parameter_tables. The syntax of parameter_list is the same as that in the explicit parameter specification for the static method call.

Notes

• In the dynamic method call, the parameters are not passed in parentheses. The syntax of the dynamic method call is like that of a function module call.
• The CALL_METHOD statement should now only be used for the dynamic method call. It is unnecessary, and therefore obsolete, for the static method call.
  

Security Note

If the name of a program unit is specified dynamically when it is called, and this name is passed to a program from outside, the result is a serious security risk. Any names passed to a program from outside must be checked thoroughly before being used in calls. The system class CL_ABAP_DYN_PRG, for example, can be used to do this. See Dynamic Calls.

System Fields

The system field sy-subrc is set to 0 when a method is called. If a non-class-based exception is raised that was handled by the assignment of a value, then sy-subrc is set to this value.

Example

Dynamic call of the static method GUI_DOWNLOAD of global class CL_GUI_FRONTEND_SERVICES for storing the content of an internal table in a file on the current presentation server. The names of the class and method are specified in the strings class and meth. The interface parameters are passed in the internal table ptab and return values are assigned to the exceptions of the method are assigned using table etab. Exceptions that occur at the method call itself are handled in a TRY control structure with statement CATCH.

DATA: line     TYPE c LENGTH 80, 
      text_tab LIKE STANDARD TABLE OF line, 
      filename TYPE string, 
      filetype TYPE c LENGTH 10, 
      fleng    TYPE i. 

DATA: meth  TYPE string, 
      class TYPE string, 
      ptab TYPE abap_parmbind_tab, 
      etab TYPE abap_excpbind_tab. 

DATA: exc_ref TYPE REF TO cx_sy_dyn_call_error. 

class    = 'CL_GUI_FRONTEND_SERVICES'. 
meth     = 'GUI_DOWNLOAD'. 
filename = 'c:\temp\text.txt'. 
filetype = 'ASC'. 

ptab = VALUE #( ( name  = 'FILENAME' 
                  kind  = cl_abap_objectdescr=>exporting 
                  value = REF #( filename ) ) 
                ( name  = 'FILETYPE' 
                  kind  = cl_abap_objectdescr=>exporting 
                  value = REF #( filetype ) ) 
                ( name  = 'DATA_TAB' 
                  kind  = cl_abap_objectdescr=>changing 
                  value = REF #( text_tab ) ) 
                ( name  = 'FILELENGTH' 
                  kind  = cl_abap_objectdescr=>importing 
                  value = REF #( fleng ) ) ). 

etab = VALUE #( ( name = 'OTHERS' value = 4 ) ). 

TRY. 
    CALL METHOD (class)=>(meth) 
      PARAMETER-TABLE 
        ptab 
      EXCEPTION-TABLE 
        etab. 
    CASE sy-subrc. 
      WHEN 1. 
        ... 
      ... 
    ENDCASE. 
  CATCH cx_sy_dyn_call_error INTO exc_ref. 
    MESSAGE exc_ref->get_text( ) TYPE 'I'. 
ENDTRY. 

Exceptions

Catchable Exceptions

CX_SY_DYN_CALL_EXCP_NOT_FOUND

• Cause: Exception does not exist
  Runtime Error: DYN_CALL_METH_EXCP_NOT_FOUND
  

CX_SY_DYN_CALL_ILLEGAL_CLASS

• Cause: Specified class does not exist
  Runtime Error: DYN_CALL_METH_CLASS_NOT_FOUND
  

CX_SY_DYN_CALL_ILLEGAL_METHOD

• Cause: Method cannot be accessed.
  Runtime Error: CALL_METHOD_NOT_ACCESSIBLE
• Cause: The called method is not implemented.
  Runtime Error: CALL_METHOD_NOT_IMPLEMENTED
• Cause: Calls the static constructor
  Runtime Error: DYN_CALL_METH_CLASSCONSTRUCTOR
• Cause: Calls the instance constructor
  Runtime Error: DYN_CALL_METH_CONSTRUCTOR
• Cause: Method does not exist
  Runtime Error: DYN_CALL_METH_NOT_FOUND
• Cause: Method is not static
  Runtime Error: DYN_CALL_METH_NO_CLASS_METHOD
• Cause: Calls a non-visible method
  Runtime Error: DYN_CALL_METH_PRIVATE
• Cause: Calls a non-visible method
  Runtime Error: DYN_CALL_METH_PROTECTED
  

CX_SY_DYN_CALL_ILLEGAL_TYPE

• Cause: Type conflict during method call.
  Runtime Error: CALL_METHOD_CONFLICT_GEN_TYPE
• Cause: Type conflict during method call.
  Runtime Error: CALL_METHOD_CONFLICT_TAB_TYPE
• Cause: Type conflict during method call.
  Runtime Error: CALL_METHOD_CONFLICT_TYPE
• Cause: Incorrect parameter type
  Runtime Error: DYN_CALL_METH_PARAM_KIND
• Cause: Actual parameter cannot be filled
  Runtime Error: DYN_CALL_METH_PARAM_LITL_MOVE
• Cause: Incorrect table type for a parameter
  Runtime Error: DYN_CALL_METH_PARAM_TAB_TYPE
• Cause: Incorrect parameter type
  Runtime Error: DYN_CALL_METH_PARAM_TYPE
  

CX_SY_DYN_CALL_PARAM_MISSING

• Cause: Missing actual parameter
  Runtime Error: DYN_CALL_METH_PARAM_MISSING
• Cause: Parameter reference is empty
  Runtime Error: DYN_CALL_METH_PARREF_INITIAL
  

CX_SY_DYN_CALL_PARAM_NOT_FOUND

• Cause: Incorrect parameter name
  Runtime Error: DYN_CALL_METH_PARAM_NOT_FOUND
  

CX_SY_REF_IS_INITIAL

• Cause: Reference variable is empty
  Runtime Error: DYN_CALL_METH_REF_IS_INITIAL
  

Non-Catchable Exceptions

• Cause: Invalid parameters for dynamic method call. Relevant for instance constructors when instantiated dynamically.
  Runtime Error: CALL_METHOD_PARMS_ILLEGAL
  

Continue

CALL METHOD - dynamic_meth