How to allow an empty string with check condition in xml transformation?

[Former Member]

Hi, experts.

How to allow an empty string with check condition in xml transformation?

U have this condition at mine xml transformation

<tt:cond s-check="not-initial(ref('ROOT.PROVIDER.BRANCHCODE'))">
  <branchCode tt:value-ref="ROOT.PROVIDER.BRANCHCODE"/>
</tt:cond>

and call the transformation

call transformation (LV_TRANS_NAME)
            source xml XML_FINAL2
            result ROOT = IT_TAB.

If document has empty <branchCode></branchCode> - everything is ok, but some documents have

space inside ( <branchCode></branchCode> )and i'm getting dump. 

How to allow an space and save check to not initial.
Type of BRANCHCODE - CHAR4.
 

[Sandra_Rossi]

s-check applies only to Serialization. You are currently Deserializing (SOURCE XML).

NB: don't confuse space (one space) and empty string (zero space).

[Former Member]

Ok, i would try to describe.
There are 4 options of how <branchCode> can attend in document
1) No <branchCode> in document
2) empty branchCode <branchCode></branchCode>
3) something inside branchCode <branchCode>value</branchCode>
4) space inside branchCode <branchCode> </branchCode>
When i to "Deserialize " xml with space inside, i'm getting a dump, when it's space inside <branchCode> (fourth option)
if i delete the 's-check' i will have a dump in case, where document hasn't <branchCode> inside (first option).
so how can i save mine s-check condition and allow to fill BRANCHCODE  with space?

[Sandra_Rossi]

Look at the documentation. s-check, d-check, check.

[Sandra_Rossi]

What is important in your case is that you are using a deserialization, so in that case <tt:cond s-check="..."> behaves like <tt:cond> which means that the transformation accepts an XML where the tag <branchCode> is absent, otherwise the value is transferred to the ABAP component BRANCHCODE (whatever it's empty or one space or any other value). I guess that you have an issue because of the next tags.

I have a test program in which I tried the code below, and it works as expected:

METHOD test1.
  DATA(xml) ='<Invoice>                    '
          && '  <branchCode> </branchCode>'
          && '</Invoice>                   '.
  DATA(transfo_result) = VALUE ty_transfo_result( ).
  CALL TRANSFORMATION (transfo_name)
      SOURCE XML xml
      RESULT root = transfo_result.
  cl_abap_unit_assert=>assert_equals( act = transfo_result
                                      exp = VALUE ty_transfo_result( branchcode = '' ) ).
ENDMETHOD.
METHOD test2.
  DATA(xml) ='<Invoice>                    '
          && '  <branchCode></branchCode>'
          && '</Invoice>                   '.
  DATA(transfo_result) = VALUE ty_transfo_result( ).
  CALL TRANSFORMATION (transfo_name)
      SOURCE XML xml
      RESULT root = transfo_result.
  cl_abap_unit_assert=>assert_equals( act = transfo_result
                                      exp = VALUE ty_transfo_result( branchcode = '' ) ).
ENDMETHOD.
METHOD test3.
  DATA(xml) ='<Invoice>                    '
          && '  <branchCode>A</branchCode>'
          && '</Invoice>                   '.
  DATA(transfo_result) = VALUE ty_transfo_result( ).
  CALL TRANSFORMATION (transfo_name)
      SOURCE XML xml
      RESULT root = transfo_result.
  cl_abap_unit_assert=>assert_equals( act = transfo_result
                                      exp = VALUE ty_transfo_result( branchcode = 'A' ) ).
ENDMETHOD.
METHOD setup.
  transfo_name = create_transfo( concat_lines_of( sep = |\r\n| table = VALUE string_table(
( `<?sap.transform simple?>                                     ` )
( `<tt:transform                                                ` )
( `xmlns:tt="http://www.sap.com/transformation-templates"       ` )
( `xmlns:ddic="http://www.sap.com/abapxml/types/dictionary"     ` )
( `xmlns:def="http://www.sap.com/abapxml/types/defined">        ` )
( `  <tt:root name="ROOT"/>                                     ` )
( `                                                             ` )
( `  <tt:template>                                              ` )
( `    <Invoice>                                                ` )
( `      <tt:cond s-check="not-initial(ref('ROOT.BRANCHCODE'))">` )
( `        <branchCode tt:value-ref="ROOT.BRANCHCODE"/>         ` )
( `      </tt:cond>                                             ` )
( `    </Invoice>                                               ` )
( `  </tt:template>                                             ` )
( `                                                             ` )
( `</tt:transform>                                              ` ) ) ) ).
ENDMETHOD.