[castor-user] [XML] unmarshalling an unknown XML source

[Roman Klaehne]

Hi,


I am using the Castor Source Code Generator together with Castor
Unmarshaller.

For the simple XML schema:

*******************************************************************
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
elementFormDefault="qualified" attributeFormDefault="unqualified">
 <xs:element name="root"/>
 <xs:element name="element"/>
</xs:schema>
*******************************************************************

I have such a binding file:

**************************************************
<binding defaultBindingType="type">
  <elementBinding name="root">
    <java-class name="RootXml"/>
  </elementBinding>
  <elementBinding name="element">
    <java-class name="ElementXml"/>
  </elementBinding>
</binding>
**************************************************

After generating the source code for the schema using the binding file
above I want to unmarshall XML sources to the repective Java classes.

When doing

***************************************************
Unmarshaller u = new Unmarshaller(RootXml.class)
Object o = u.unmarshal(reader)
***************************************************

the object o is correctly unmarshalled and is an instance of class
RootXml (as it should be).

But when using the default constructor of Unmarshaller (without giving
the root class RootXml.class) I get the following error message:

"The class for the root element 'root' could not be found."

My intention is to have XML documents with root elements "<root>" or
"<element>" and when calling Unmarshaller.unmarshal() I don't know the
type of the XML source (root or element). That means I want to do the
following:

****************************************
Unmarshaller u = new Unmarshaller();
Object o = u.unmarshal();

if(o instanceof RootXml) {
  doRoot();
}
else if(o instanceof ElementXml) {
  doElement();
}
****************************************

Do you have any ideas to get this working?


Thanks in advance and best regards
/Roman Klähne
(ZIB Berlin)










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