|
midrange.com
Hello everyone!
I need help with XML Interface for RPG (Qxml4PR310).
My programm creates an XML tree using DOMparser, collects data from DB2
file and puts them in appropriate nodes and in the end writtes created XML
tree in streamFile (on IFS) using QxmlWriteOutputStream procedure.
It's not more complicated then IBM's examles in eSeries Informaton Center.
Only problem is created XML stream file which should be readable on
windows platform whith desired code page (in my case windows-1250). I red
all literature to figure out how to use different CCSIDs with mentioned
API but still I have no clue how to write stmf with CCSID 1250.
Data in DB2 file is with CCSID 870 and systems default CCSID is 870.
I'll describe what I'm doing in code, so maybe somebody find mistake:
/COPY QSYSINC/QRPGLESRC,QXML4PR310
DDomDoc@ S *
DDomNode@ S *
DDomImpl@ S *
DRootElem@ S *
DParentElem@ S *
DChildElem@ S *
DProdElem@ S *
DDataVal@ S *
Dstrgbuf@ S *
DpomString S 256A inz(*blanks)
*a lot of code goes here
****creation of an element that will contain child element
*---create 0terminated string for value Sudionik---------
C EVAL %str(strgbuf@:256)='Sudionik'
*---get adress of newly created DOMstring from 0terminated
*---string coded with CCSID 870
C EVAL DomString1@=
C QxmlDOMString_new(strgbuf@:
C 870:
C 8)
*---create new element in DOM document with name stored at adress
DOMString1@
*---Qxml_INDOMSTR constant (-1) idicates that DOMString1@ pointing
*---at DOMString object
C EVAL ParentElem@=QxmlDOM_Document_createElement
C (DomDoc@:
C DOMString1@:
C Qxml_INDOMSTR:
C 0)
C*---add parent element on addres ParentElem@ to root element list
C EVAL child@ = QxmlDOM_Node_appendChild
C (RootElem@:
C ParentElem@)
*---clear resources that are not in use any more
C CALLP QxmlDOM_Node_delete(child@)
C CALLP QxmlDOMString_delete(DOMString1@)
****creation of an child element 4 previosly created parent element
*---create 0terminated string for value VBDI---------
C EVAL %str(strgbuf@:256)='VBDI'
*---get adress of newly created DOMstring from 0terminated
*---string coded with CCSID 870
C EVAL DomString1@=
C QxmlDOMString_new(strgbuf@:
C 870:
C 4)
*---create new element in DOM document with name stored at adress
DOMString1@
*---Qxml_INDOMSTR constant (-1) idicates that DOMString1@ pointing
*---at DOMString object
C EVAL ChildElem@=QxmlDOM_Document_createElement
C (DomDoc@:
C DOMString1@:
C Qxml_INDOMSTR:
C 0)
*---add child element to Parent Element
C EVAL child@ = QxmlDOM_Node_appendChild
C (ParentElem@:
C ChildElem@)
*---clear resources that are not in use any more
C CALLP QxmlDOM_Node_delete(child@)
C CALLP QxmlDOMString_delete(DOMString1@)
***Creation of TXT node that will contain value
*---VBDI is file field (numeric), move it to character field and
convert
*---character field pomString to null-terminated string
C movel VBDI pomString
C EVAL %str(strgbuf@:256)=%trim(pomString)
*---create TXT node and set its value from null-terminated string on
strgbuf@
*---address.
C EVAL DataVal@ =
C QxmlDOM_Document_createTextNode
C (DomDoc@:
C strgbuf@:
C 870:
C 4)
*---ADD txt node pointed by DataValue@ to child element
C EVAL child@ = QxmlDOM_Node_appendChild(
C ChildElem@:
C ProdDataVal@)
*---clear resources that are not in use any more
C CALLP QxmlDOM_Text_delete(ProdDataVal@)
C CALLP QxmlDOM_Element_delete(ChildElem@)
C CALLP QxmlDOM_Node_delete(child@)
OK. At this point I have this situation in memory:
root
|
parent1(....) -previosly added node
|
parent2(....) -previosly added node
|
parent3(NodeTYPE=ELEMENT, NodeName='Sudionik',
| ChildList(FirstChild(NodeTYPE=ELEMENT, NodeName='VBDI',
|
ChildList(FirstChild(NodeTYPE=TXT,NodeName='',NodeValue='someNumber',...)
| )
| ),.....)
| )
|
NULL
After some time structure will be loaded with data from DB2 file and will
be ready for writtnig into
stream file.
I'll just writte piece of code that performs some of job (there is a lot
of recursive calls and looping while writting so I expect that peopole who
know anything abouth XML processing will understand this fiew line:)) ):
*---Open stream file with code page (CCSID) 870
C EVAL fd=QxmlOpenNewOutputStream
C (xmlFile2@:
C 0: ErrNo@: 870)
.
.
.
. some code
.
.
*---If curent node is TXT TYPE writte its value in STMF
C WHEN NodeType =Qxml_TEXT_NOD
C EVAL rtn=QxmlWriteOutputStream(fd:
C NodeVal@:Qxml_INDOMSTR:0)
OK. Everything described work fine. After creation of STMF I do next
thing. With CPYFRMSTMF comand I copy
STMF in DB2 file with one field and CCSID 870 and after that copy DB2 file
into new stream file with codepage parm
set to *PCASCII. Well I'm shame (it's stupid) but it is only way the thing
works. CL that do all jaob is next:
PGM
call pgm(createxml) parm('newXML.xml')
clrpfm vbigor/vbecmcbucd
cpyfrmstmf +
fromstmf('newXML.xml') +
tombr('/qsys.lib/v****.lib/vbecmcbucd.file+
/vbecmcbucd.mbr') mbropt(*add) +
ENDLINFMT(*ALL)
cpytostmf +
frommbr('/qsys.lib/v****.lib/vbecmcbucd.file+
/vbecmcbucd.mbr') +
tostmf('CLBF01.xml') STMFCODPAG(*PCASCII) +
ENDLINFMT(*CRLF)
ENDPGM
CLBF01.xml is readable on windows platform and had all correct characters
used by 1250 code page.
You can ask why I didn't change 870 CCSID in code in 1250 when I'm openinf
stream file. I did but after that program crashes down
with message that system is not allocated memory properly. I read some
examples that suggest using of qXMLTranscode procedure, but what should I
do with it when output stream is opened for writting in 870 CCSID.
And one more thing, I implemented reverse process of loading data from
windows-1250 encoded XML file in db2 with conversion in 870 CCSID and it
works fine without any lost characters.
If anyone knows something that will help me, writte...
Thanks very much,
Igor.
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