Problem casting org.w3c.dom.Document to oracle.xml.parser.v2.XMLDocument

I have the following problem:
I get my xml-documents as an XMLType from the database and want to compare these using the supplied Oracle class oracle.xml.differ.XMLDiff (i use the java version supplied with Oracle 9i r2).
XMLType.getDOM() returns the xml-document as a org.w3c.dom.Document,
what i need for oracle.xml.differ.XMLDiff is a oracle.xml.parser.v2.XMLDocument.
How can i cast/convert between these two formats?
thanks!
p.s. cross-posting with Re: Casting/Converting XMLType to XMLDocument? (but i think this forum is more relevant).

Hi,
thanks for the suggestion: i have written the code shown below. It results in a casting error.
As far as i know, i don't use a oracle.xdb.dom.XDBDocument, i only use a oracle.xdb.XMLType as the input parameter for my conversion-method:
any new suggestions ???
p.s. the second method which is commented does work, but is a bit verbose.
   private static oracle.xml.parser.v2.XMLDocument convert2XMLDocument(XMLType xml) {
     // simple version (should work according to tech. doc. 9i r2/ 10g r1 database)
     oracle.xml.parser.v2.XMLDocument doc = null;
     try {
        // n.b. probleem is dat XMLType.getDOM() een w3c.Document object teruggeeft ipv een oracle.XMLDocument.
        System.out.println("convert2XMLDocument(): casting w3c.Document naar oracle.XMLDocument.");
        doc = (oracle.xml.parser.v2.XMLDocument) xml.getDOM(); // public org.w3c.dom.Document getDOM()
        System.out.println("convert2XMLDocument(): done casting w3c.Document naar oracle.XMLDocument.");
     catch (Exception e) {
        e.printStackTrace(System.out);
    return doc;
   private static XMLDocument convert2XMLDocument(XMLType xml) {
     // complex version: works ok !!!
     XMLDocument doc = null;
     try{
        DOMParser parser = new DOMParser();
        parser.setValidationMode(oracle.xml.parser.v2.XMLParser.NONVALIDATING);
        parser.setPreserveWhitespace (true);
        parser.parse(new StringReader(xml.getStringVal()));
        doc = parser.getDocument();
    catch ( XMLParseException e ) {
      e.printStackTrace(System.out);
    catch ( SQLException e ) {
      e.printStackTrace(System.out);
    catch ( Exception e ) {
      e.printStackTrace(System.out);
    return doc;
convert2XMLDocument(): casting w3c.Document naar oracle.XMLDocument.
    java.lang.ClassCastException: oracle.xdb.dom.XDBDocument
     at pnb.bdb.xml.testJDBC.convert2XMLDocument(testJDBC.java:305)
     at pnb.bdb.xml.testJDBC.main(testJDBC.java:187)

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Thanks a lot guys for all that information.
Rajesh Mirchandani <[email protected]> wrote:
Suren,
More info at
http://edocs.bea.com/wls/docs60/faq/java.html#251197
Rob Woollen wrote:
The quick fix is probably to use the -Xss argument on the Solaris JVMto increase the
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-- Rob
Suren wrote:
Thanks for your quick response.
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Suren.
Rob Woollen <[email protected]> wrote:
It looks like the stack is overflowing when your DOM Tree is being
serialized.
Perhaps the Solaris JVM has a lower stack size by default.
-- Rob
Suren wrote:
Hello,
I hope someone can help me with this.
I have a stateless session bean, which is returning a
org.w3c.dom.Document object. The whole object is getting created
but at the client side I am getting the following exception:
java.rmi.RemoteException: ; nested exception is:
weblogic.rmi.ServerError: A RemoteException occurred in
the
server method
- with nested exception:
[java.lang.StackOverflowError:
Start server side stack trace:
java.lang.StackOverflowError
at java.lang.Exception.<init>(Compiled Code)
at java.lang.reflect.InvocationTargetException.<init>(InvocationTargetEx
ception.java:58)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Compiled Code)
at java.io.ObjectOutputStream.invokeObjectWriter(Compiled
Code)
at java.io.ObjectOutputStream.outputObject(Compiled Code)
at java.io.ObjectOutputStream.writeObject(Compiled Code)
at java.io.ObjectOutputStream.outputClassFields(CompiledCode)
at java.io.ObjectOutputStream.defaultWriteObject(CompiledCode)
Then multiple occurences of the last few lines followed by
at org.apache.xerces.dom.ParentNode.writeObject(CompiledCode)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Compiled Code)
at java.io.ObjectOutputStream.invokeObjectWriter(CompiledCode)
at java.io.ObjectOutputStream.outputObject(Compiled Code)
at java.io.ObjectOutputStream.writeObject(Compiled Code)
at java.io.ObjectOutputStream.outputClassFields(CompiledCode)
at java.io.ObjectOutputStream.defaultWriteObject(CompiledCode)
at org.apache.xerces.dom.ParentNode.writeObject(CompiledCode)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Compiled Code)
at java.io.ObjectOutputStream.invokeObjectWriter(CompiledCode)
at java.io.ObjectOutputStream.outputObject(Compiled Code)
at java.io.ObjectOutputStream.writeObject(Compiled Code)
at weblogic.common.internal.WLObjectOutputStreamBase.writeObject(Compiled
Code)
at weblogic.common.internal.WLObjectOutputStreamBase.writeSpecial(Compiled
Code)
at weblogic.common.internal.WLObjectOutputStreamBase.writeObject(Compiled
Code)
at weblogic.common.internal.WLObjectOutputStreamBase.writeObjectWL(Compiled
Code)
at weblogic.rmi.extensions.AbstractOutputStream2.writeObject(Compiled
Code)
at com.ssmb.teams.model.CMSInterestDataEJBEOImpl_WLSkel.invoke(Compiled
Code)
at weblogic.rmi.extensions.BasicServerObjectAdapter.invoke(CompiledCode
at weblogic.rmi.extensions.BasicRequestHandler.handleRequest(Compiled
Code)
at weblogic.rmi.internal.BasicExecuteRequest.execute(CompiledCode)
at weblogic.kernel.ExecuteThread.run(Compiled Code)
End server side stack trace
at weblogic.rmi.extensions.AbstractRequest.sendReceive(AbstractRequest.j
ava:76)
at com.ssmb.teams.model.CMSInterestDataEJBEOImpl_WLStub.getRegionAnalyst
Data(CMSInterestDataEJBEOImpl_WLStub.java:558)
at com.ssmb.teams.model.CMSInterestDataEJBEOImpl_ServiceStub.getRegionAn
alystData(CMSInterestDataEJBEOImpl_ServiceStub.java, Compiled
Code)
at CMSJavaScript.main(CMSJavaScript.java:87)
The structure of the XML document is
<Maillist>
<Region>
<RegionCode>7</RegionCode>
<RegionName>Asia Pacific</RegionName>
<Analyst>
<Id>11111</Id>
<Name>AAAAAAAAAAAAAAAAA</Name>
</Analyst>
<Analyst>
<Id>22222</Id>
<Name>BBBBBBBBBBBBBBBBBB</Name>
</Analyst>
</Region>
</Maillist>
If the no. of Anlayst elements are 219, I am getting this error( the
same thing
is working for less no. of analyst).
Surprisingly when I access this ejb, by deploying it on my local
server
instance
on Win-NT, it works fine. I am getting this
exception, when the server is running on Sun Solaris.
The weblogic version is 5.1.
It will be really helpful if someone can reply to mee ASAP
Thanks.
Suren.

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Is here a library that can print it to a xml file?
Secondly I wish print it as .html, so output should a bit differ from standard .xml output.

Yes. In both cases you use a Transformer. (That's in package javax.xml.transform.) You get it via one of the TransformerFactory.newTransformer() methods. To do a straight copy you use the method with no parameters, which does an "identity transformation". To transform to HTML, you use the method with an XSLT for its parameter.

Org.w3c.dom Document newbie question

hello
I have a string of an XML document that i want to make into a dom.Document. i can't seem to create it though.
DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder();
org.w3c.dom.Document doc = db.parse(new StringBufferInputStream(s.substring(s.indexOf("?>") + 2).trim()));the String s has a xml header with <? and ?> and you see here i am stripping that off the top... i tried with it on, and w/o, but i keep getting back a Document that is null. what is required for a document to be made? can't i just do <sometag>blah</sometag>
and thats good enough?

getting back a Document that is nullIf that means that the variable doc contains a null reference after you execute that statement, then most likely the statement is throwing an exception that you are ignoring. And that exception is probably because you're passing malformed XML to the parser... you have done some debugging to see what string you are passing to it, haven't you?
And why StringBufferInputStream? The whole class is deprecated. Better to use a StringReader instead:doc = db.parse(new InputSource(new StringReader(...)));(This is posted frequently on this forum but here it is yet again.)

Problem casting org.w3c.dom.Document to oracle.xml.parser.v2.XMLDocument

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