Problem retrieving Data from a CDATA-Section using XMLDOM

Question

Hello,
Ware: Oracle 8.1.7.4 64bit, XDK for PL/SQL Version 9.2.0.3, Solaris8 64bit
I can't retrieve Data from the CDATA-Section of an XML-String, neither with
getData(DOMCharacterData) or substringData. Also getLength fails. I get always
the following error:
ERROR at line 1:
ORA-29532: Java call terminated by uncaught Java exception: java.lang.ClassCastException
ORA-06512: at "XML_SCHEMA.XMLCHARDATACOVER", line 0
ORA-06512: at "XML_SCHEMA.XMLDOM", line 853
ORA-06512: at "SCHWABE.XML_TEST", line 47
ORA-06512: at line 1
I can successfully cast the DOMNode to a CharacterData with makeCharacterData
and check with isNull (DOMCharacterData) (returns FALSE).
My Testcase:
1) A Function which build a XML-Document:
CREATE OR REPLACE FUNCTION XML_ResponseCalc RETURN VARCHAR2 IS
doc VARCHAR2(32767);
BEGIN
doc :=
'<?xml version="1.0" encoding="UTF-8"?>
<RSDecEng>
<Version>1.00</Version>
<ResponseCalc>
<ID>00000000000000000014</ID>
<Burst>
<Definition>
<Count>1</Count>
<ID>
<Start>1</Start>
<Length>4</Length>
</ID>
<Var>
<Name>Risiko_1</Name>
<Start>5</Start>
<Length>5</Length>
</Var>
</Definition>
<Data>
<Length>9</Length>
<Count>5</Count>
<![CDATA[
1 0.001
2 0.002
3 0.003
4 0.004
5 0.005
6 0.006
7 0.007
8 0.008
9 0.009
10 0.010
]]>
</Data>
</Burst>
</ResponseCalc>
</RSDecEng>
2) The Procedure which parses the XML-Document (no Exception-Handling):
CREATE OR REPLACE PROCEDURE XML_TEST IS
Parser XML_SCHEMA.XMLParser.Parser;
DOMDocument XML_SCHEMA.XMLDOM.DOMDocument;
DOMNode XML_SCHEMA.XMLDOM.DOMNode;
DOMNodeItem XML_SCHEMA.XMLDOM.DOMNode;
DOMNodeList XML_SCHEMA.XMLDOM.DOMNodeList;
DOMCharacterData XML_SCHEMA.XMLDOM.DOMCharacterData;
TheDocument CLOB;
ID VARCHAR2(100);
Data VARCHAR2(200);
BEGIN
-- LOB
DBMS_LOB.CREATETEMPORARY(TheDocument, TRUE);
DBMS_LOB.WRITEAPPEND(TheDocument, LENGTH(XML_ResponseCalc), XML_ResponseCalc);
-- Parse
Parser := XML_SCHEMA.XMLParser.NewParser;
XML_SCHEMA.XMLParser.ParseCLOB(Parser, TheDocument);
DOMDocument := XML_SCHEMA.XMLParser.GetDocument(Parser);
XML_SCHEMA.XMLParser.FreeParser(Parser);
-- Node
DOMNode := XML_SCHEMA.XMLDOM.MakeNode(DOMDocument);
-- Get ID
DOMNodeList := XML_SCHEMA.XSLProcessor.SelectNodes
(DOMNode,'/RSDecEng/ResponseCalc/ID/text()');
IF XML_SCHEMA.XMLDOM.GetLength(DOMNodeList) > 0 THEN
DOMNodeItem := XML_SCHEMA.XMLDOM.Item(DOMNodeList, 0);
XML_SCHEMA.XMLDOM.WriteToBuffer(DOMNodeItem, ID);
SYS.DBMS_OUTPUT.PUT_LINE ('ID: '||ID);
END IF;
-- Get CDATA
DOMCharacterData := XML_SCHEMA.XMLDOM.MakeCharacterData(DomNode); -- <-- ok here...
IF NOT XML_SCHEMA.XMLDOM.isNull (DOMCharacterData) THEN -- <-- ...and here
Data := XML_SCHEMA.XMLDOM.GETDATA(DOMCharacterData); -- <-- ...but here Exception raise
END IF;
END;
I hope you can help me.
Thank you in advance
Markus Schwabe

Answer 1

You need to notice the definitions for makecharacterdata:
FUNCTION makeCharacterData(n DOMNode) RETURN DOMCharacterData;
PURPOSE
Casts given DOMNode to a DOMCharacterData
It only do the casting.