SQLException "Expected 'EOF'" when extracting XMLType from ResultSet

Question

Hi,
I am trying to implement a Java method that returns the nodes matching a given xpath expression. The query is working fine and the code is mostly working. The problem is getting the information out of an XmlType in Java.
The query is as follows:
---8<--
select extract(res, '/xdb:Resource/xdb:Contents'||:xpath,
'xmlns:xdb="http://xmlns.oracle.com/xdb/XDBResource.xsd" '||:ns) node
from resource_view
where under_path(res, :path) = 1;
---8<--
xpath = '//n:PostalCode'
ns = 'xmlns:n="uri:cosmos:schema:company:1.0"'
path = '/home/contactmgr'
And the Java code:
---8<---
resultSet = statement.executeQuery();
while (resultSet.next())
OPAQUE opaque = (OPAQUE) resultSet.getObject(1);
if (opaque != null)
XMLType myNode = XMLType.createXML(opaque);
String testString = myNode.getStringVal();
Document testDocument = myNode.getDOM();
---8<---
The testString contains the expected result (messy, but workable), i.e. "<PostalCode xmlns="uri:cosmos:schema:company:1.0">GU1 4LY</PostalCode>\n<PostalCode xmlns="uri:cosmos:schema:company:1.0">TW18 4AQ</PostalCode>\n". These are the two postal codes in the first document.
The call to myNode.getDOM() fails with an SQLException and a message of "Expected 'EOF'".
I appreciate that the returned xml is a fragment and as such it shouldn't be possible to return an org.w3c.dom.Document instance. However, when I try using myNode.getDocumentFragment() I still get an SQLException but with no message or any other details.
The method is currently expected to return a list of Nodes.
Any ideas?

Answer 1

The Oracle 10G XDB Developers Guide (http://download-west.oracle.com/docs/cd/B13789_01/appdev.101/b10790/xdb03usg.htm#sthref209) offers the following:
"The extract() function returns the node or nodes that match the XPath expression. Nodes are returned as an instance of XMLType. The results of extract() can be either a document or DocumentFragment."
To provide for the fact that an XPath expression may match multiple nodes in any given document, I modified the query to use xmlsequence(). This should then return an array of XmlType instances.
--8<--
select xmlsequence(extract(res, '/xdb:Resource/xdb:Contents'||?,
'xmlns:xdb="http://xmlns.oracle.com/xdb/XDBResource.xsd"
'||?)) nodes
from resource_view
where under_path(res, ?) = 1;
--8<--
The Java JDBC code then looks like this:
--8<--
OPAQUE[] myRawNodes = (OPAQUE[]) myResultSet.getArray(1).getArray();
for (int i = 0; i < myRawNodes.length; i++)
OPAQUE myOpaque = (OPAQUE) myRawNodes[ i ];
if (myOpaque != null)
XMLType myNode = XMLType.createXML(myOpaque);
myCollection.add(myNode.getDOM());
--8<--
Testing this out however, I get the following exception:
java.sql.SQLException: Internal Error: makeJavaArray doesn't support type 2007
To re-iterate: my goal is to:
a) evaluate an XPath expression that will return a list of nodes against all the documents under a particular path in the resource_view;
b) extract all the returned nodes using JDBC; and
c) return the collection of nodes to the caller.
Any ideas?