ABAP Simple Transformations

[Former Member]

Hi,

does anyone know if Simple Transformations can be used to trasfer an XML data to an object? (instance of a class?)

all examples I saw are for structs and tables only, and not object references..

Thanks,

Mirit.

[Sandra_Rossi]

Yes. Please search forum about IF_SERIALIZABLE_OBJECT interface

[Former Member]

Yeh, thanks for that.

what i still don't know is how to access the fields of the object inside the ST tself. like regular attribute of a struct?

because it still not recognizing the attributes, even after i implemented the serialization interface.

[Sandra_Rossi]

paste your code then, you must have a bug

[Former Member]

Here's the sample code I used to check the ST:

the object class (includes the if_serializabe_object):

-

---

class Z_PERSON definition

public

final

create public .

" public components of class Z_PERSON

" do not include other source files here!!!

public section.

interfaces IF_SERIALIZABLE_OBJECT .

interfaces Z_IF_ENTITY .

interfaces Z_IF_PAYABLE .

data SIMPLE_STRING type STRINGVAL .

methods WRITE_PROG .

protected section.

" protected components of class Z_PERSON

" do not include other source files here!!!

private section.

" private components of class Z_PERSON

" do not include other source files here!!!

ENDCLASS.

CLASS Z_PERSON IMPLEMENTATION.

ENDCLASS.

-

---

the ST code:

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---

'<'?sap.transform simple?'>'

'<'tt:transform xmlns:tt="http://www.sap.com/transformation-templates"'>'

'<'tt:root name="ROOT" /'>'

'<'tt:template'>'

'<'tt:deserialize'>'

'<'sapesourcing'>'

' <'objects'>'

'<'object'>'

'<'fields'>'

'<'PERSON_NAME tt:value-ref=".ROOT.SIMPLE_STRING"/'>'

'<'/fields'>'

'<'/object'>'

'<'/objects'>'

'<'/sapesourcing'>'

'<'/tt:deserialize'>'

'<'/tt:template'>'

'<'/tt:transform'> '

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---

the report which runs the transformation:

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---

REPORT z_test_simple_transformation.

TYPES: BEGIN OF ls_xml_line,

data(256) TYPE x,

END OF ls_xml_line.

DATA:

exc TYPE REF TO cx_root,

lv_ixml TYPE REF TO if_ixml,

lv_xml_stream_factory TYPE REF TO if_ixml_stream_factory,

lv_xml_input_stream TYPE REF TO if_ixml_istream,

lv_xml_output_stream TYPE REF TO if_ixml_ostream,

lv_input_filepath TYPE string,

lv_output_filepath TYPE string,

lv_input_filelength TYPE i,

lv_output_filelength TYPE i,

lt_input_xml_table TYPE TABLE OF ls_xml_line,

lt_output_xml_table TYPE TABLE OF ls_xml_line.

TRY.

lv_output_filepath = 'C:\files\AmexGL1025\partial_GL1025_BoConverted_ABAP.xml'.

cl_gui_frontend_services=>gui_upload( EXPORTING filename = lv_output_filepath

filetype = 'BIN'

IMPORTING filelength = lv_output_filelength

CHANGING data_tab = lt_input_xml_table ).

lv_ixml = cl_ixml=>create( ).

lv_xml_stream_factory = lv_ixml->create_stream_factory( ).

lv_xml_input_stream = lv_xml_stream_factory->create_istream_itable( table = lt_input_xml_table size = lv_output_filelength ).

DATA lo_testing_object TYPE REF TO z_person.

CREATE OBJECT lo_testing_object TYPE z_person.

CALL TRANSFORMATION Z_simple_transformation_test SOURCE XML lv_xml_input_stream RESULT root = lo_testing_object .

CATCH cx_root INTO exc.

DATA lv_error_message TYPE string.

lv_error_message = exc->get_text( ).

WRITE lv_error_message.

ENDTRY.

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I don't know why the indentation here is so awful.

If you can see what the bug is- it will be great...

Thanks!

Edited by: Mirit Mondani on Mar 16, 2010 6:05 PM

Edited by: Mirit Mondani on Mar 16, 2010 6:07 PM

[Sandra_Rossi]

could you paste the xml too?

[Former Member]

of course..

(it's just a simple partial xml for the trying, but its compatible with the ST)

<?xml version="1.0" encoding="utf-8"?>

<sapesourcing>

<objects>

<object>

<fields>

<PERSON_NAME>string name</PERSON_NAME>

</fields>

</object>

</objects>

</sapesourcing>

[Sandra_Rossi]

I can see that it doesn't work, but don't know how to make it work. Usually, we serialize a variable into xml, and deserialize this xml (unchanged) to a variable. Why don't you do it this way?

The XML would be:

<?xml version="1.0" encoding="utf-16"?>
<asx:abap xmlns:asx="http://www.sap.com/abapxml" version="1.0">
<asx:values>
<ROOTO href="#o3"/>
</asx:values>
<asx:heap xmlns:xsd="http://www.w3.org/2001/XMLSchem
a" 
xmlns:abap="http://www.sap.com/abapxml/types/built-in" 
xmlns:cls="http://www.sap.com/abapxml/classes/global" 
xmlns:dic="http://www.sap.com/abapxml/types/dictionary">
<prg:Z_PERSON xmlns:prg="http://www.sap.com/abapxml/classes/program/Z_TEST" i
d="o3">
<local.Z_PERSON>
<SIMPLE_STRING>AA</SIMPLE_STRING>
</local.Z_PERSON>
</prg:Z_PERSON>
</asx:heap>
</asx:abap>

[Former Member]

What i actually get is an xml file, which contains the whole object in it. so i need to deserialize the object at once.

what are you using in order to generate such an xml? ST that serializes a specific field?

[Sandra_Rossi]

To serialize, you just have to reverse the call transformation:

CALL TRANSFORMATION <transformation_name>
   SOURCE root = variable
   RESULT XML string.

[Sandra_Rossi]

I remember that you have conditioned the transformation to work only with deserialization (<tt:deserialize>) so you should remove it so that the transformation can process the serialization (with CALL TRANSFORMATION as I said above).

[Former Member]

yes, I know. I conditioned it just for the clarification that it is used only for deserialization (the xml is given by outside system).

Thanks a lot !

I'll try to make this work for the whole object, instead of a variable.