JSON encoding

[former_member570046]

Hello all

I need to send JSON data to a customer, for example :

[{"PERNR":"00000001","NACHN":"Smith","VORNA":"Jürgen"}]

This data will be sent and received via flat files, and also via OData in SEGW (SAP Gateway Builder). So I assume the name "Jürgen" for example would need to be encoded ..

Questions:

1) Do I need to encode this to UTF-8 ?

2) If so, how do I do this in ABAP ?

(If seen  cl_abap_conv_out_ce=>create( encoding = '4110' ) - but this results in an XSTRING ? )

Thanks in advance !

Jan

[larshp]

see

[Sandra_Rossi]

Of course it's XSTRING, how could it be stored another way? If you're in a Unicode system, characters in String or C are always stored in UTF-16, cannot be anything else (more exactly UCS-2).

[former_member570046]

Thanks Sandra, I understand that the result is XSTRING but my challenge is to now represent this as JSON data in an OData response - which I thought could only be of type STRING - therefore ü would be "&#252" or something similar ?

[horst_keller]

which I thought could only be of type STRING

What makes you think so?

OData is itself based on XML and/or JSON. You create the files as strings on your platform, but you send them around as UTF-8.

In fact I don't think you have to care at all. "Jürgen" should be translated to the appropriate UTF-8 representation by the OData framework, your'e using.

Horst

[former_member570046]

Excellent, thanks for the confirmation - much appreciated !

[horst_keller]

Of course, you have to test it

[horst_keller]

 cl_abap_conv_out_ce=>create( encoding = '4110' ) 

A more convenient class is CL_ABAP_CODEPAGE, e.g.:

DATA: str  TYPE string,

      xstr TYPE xstring.

xstr = cl_abap_codepage=>convert_to(

  source   = str

  codepage = `UTF-8` ).

                                                                                                                                                                                                                            You get a codepage representation of a character string in an xstring. Method convert_from does it vice versa.

If you transform ABAP data with call transformation you can decide whether the result is a string or an xstring, where xstring is the recommended type.          

As Sandra said, ABAP characters are stored internally in UCS-2. But the standard transfer format for XML and JSON is UTF-8. Therfore, it makes sense to convert the internal ABAP representation into UTF-8 in an xstring.

Horst