DirectToXMLType Mapping and XMLType functions

Question

Hi,
I am using Toplink 11g, Weblogic 10.3 and Database Oracle 11g for my application. This application uses DirectToXMLType mapping. XMLtype column is mapped as String. Though I am able to create and query(findAll) the tables, I am not able to use specific XMLType functions like existsNode, extract etc... These methods throw the following exception.
TopLink Warning: 2009.03.18 05:26:00.328--DatabaseSessionImpl(22872587)--Exception TOPLINK-6047 (Oracle TopLink - 11g Release 1 (11.1.1.1.0) (Build 090129)): oracle.toplink.exceptions.QueryException
Invalid operator platform operator - ExistsNode in expression.
Are these operators supported?
When I query the database directly
SELECT * FROM element WHERE existsNode(ELEMENT_META, '//ROOT','xmlns:ora="http://xmlns.oracle.com/xdb"')= 1;
rows are returned.
I constructed an expression simillar to the following as
ExpressionBuilder exp = new ExpressionBuilder();
Expression criteria = exp.get("elementMeta").existsNode("'//ROOT','xmlns:ora=\"http://xmlns.oracle.com/xdb\"'").equal(1);
The above method throws exception. I followed the example provided in Oracle Toplink Developer guide, Example 110–7 Using the XMLType Extract Operator,
builder.get("resume").extract("//education/degree/text()").getStringVal().equal("BCS");
this also throws error for getStringVal().
Do I need to do any other setup?
Regards
Raji

Answer 1

Hello,
In your TopLink login configuration, what DatabasePlatform have you specified? The existsNode operator only exists in the Oracle9Platform class, and so can only be used if you are using it or the Oracle10Platform or Oracle11Platform which extend it.
Best Regards,
Chris