Comments
SAP ST TT CALL-METHOD INSTANCE documentation, setup help and example usage
ARTICLE
ST - tt:call-method , Calling Instance Methods
Syntax
[writer = "writer_para"]
[reader = "reader_para"] >
[<(><<)>tt:with-parameter [s-|d-]name="para1"
[ref="node1"|val="val1"|var="var1"] /
<(><<)>tt:with-parameter [s-|d-]name="para2"
[ref="node2"|val="val2"|var="var2"] /
...]
/tt:call-method
Effect
Using this variant of the tt:call-method statement, you can call an instance method of a global ABAP Objects class in an ST program as follows: You can use var to declare a variable or a parameter of the ST program. The ref-type addition must have been used to create the variable or parameter as a class reference variable or interface reference variable. When called, the variable or parameter must point to the object of a class. The object can have been generated either in the
ST program using tt:create-object , or it is referred to a corresponding ABAP reference variable.
You can use meth to declare a visible method that exists in the static type of the reference variable, that is, in the class or interface. The declaration of the method is not case-sensitive.
Method execution, parameter passing, and optional attributes are subject to the same conditions as static method calls .
Example
The following transformation calls an instance method convert in an object that is referenced by the parameter OPAR . This is transferred to the input parameter input of the method, and its return code result is assigned to a variable with the same name. The variable result is then serialized using tt:write . Note that no data root can be assigned to the return code of the method during serialization.
xmlns:tt="http://www.sap.com/transformation-templates">
tt:root name="ROOT"/
tt:parameter name="OPAR" ref-type="cls"/
tt:variable name="result"/
<(><<)>tt:template>
<(><<)>tt:call-method s-name="convert" var="OPAR">
tt:with-parameter name="input" ref="ROOT"/
tt:with-parameter name="result" var="result"/
<(><<)>/tt:call-method>
<(><<)>Result>
tt:write var="result"/
<(><<)>/Result>
<(><<)>/tt:template>
/tt:transform
The following is an example of a calling ABAP program:
DATA oref TYPE REF TO cls.
DATA text TYPE string VALUE '1 2 3'.
DATA exc TYPE REF TO cx_st_call_method_error.
CREATE OBJECT oref.
TRY.
CALL TRANSFORMATION ...
SOURCE root = text
PARAMETERS opar = oref
RESULT XML xml_string.
cl_abap_browser=>show_xml( xml_string = xml_string ).
CATCH cx_st_call_method_error INTO exc.
...
ENDTRY.
A reference to an object of the required class is transferred with the addition PARAMETERS .
The method convert of the class cls is defined as follows:
result = input.
REPLACE ALL OCCURRENCES OF ` ` IN result WITH `-`.
ENDMETHOD.
The result of the transformation is as follows:
Result 1-2-3 /Result
Documentation extract taken from SAP system, � Copyright SAP AG. All rights reserved
