How to handle unknown root node type when parsing?

Question

Hello all, hoping someone knows how to accomplish this...
I'm trying to use XMLBeans to parse RIXML 2.0 documents. This schema allows for
multiple root node types, so I don't know when I'm trying to parse a file if the
root node is a Research node or a Product node, for example. If I try to invoke
parse and there is a type mismatch I get the following error:
com.bea.xml.XmlException: D:\RIXML\V2TestDoc.xml:0: error: The document is not
a Research@http://www.rixml.org/2002/6/RIXML: document element local name mismatch
expected Researchgot Product
     at com.bea.xbean.store.Root.verifyDocumentType(Root.java:472)
     at com.bea.xbean.store.Root.autoTypedDocument(Root.java:394)
     at com.bea.xbean.store.Root.loadXml(Root.java:763)
     at com.bea.xbean.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:286)
     at com.bea.xbean.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:224)
     at org.rixml.x2002.x6.rixml.ResearchDocument$Factory.parse(Unknown Source)
     at Test.main(Test.java:21)
Exception in thread "main"
So how do I generically handle parsing when I don't know what type of root node
I'm going to get?
Thanks,
Joe

Answer 1

Hello Joe -- You might try parsing the document as XmlObject (which your
schema-generated types extend). Then you could use an XmlCursor to discover
what the root element's local name is. Something like the following code
might be a way to do it. You could also simply re-parse the document after
discovering its root element name, but that would probably be more
expensive.
XmlObject xml = XmlObject.Factory.parse(mydoc.xml);
XmlCursor cursor = xml.newCursor();
cursor.toFirstContentToken();
if (cursor.getName().getLocalPart().equals("Research"))
// cast the XmlObject to your ResearchDocument type and use it.
else if (cursor.getName().getLocalPart().equals("Product"))
// cast the XmlObject to your ProductDocument type and use it.
cursor.dispose();
Steve
"Joe Celentano" <[email protected]> wrote in message
news:[email protected]..
>
Hello all, hoping someone knows how to accomplish this...
I'm trying to use XMLBeans to parse RIXML 2.0 documents. This schemaallows for
multiple root node types, so I don't know when I'm trying to parse a fileif the
root node is a Research node or a Product node, for example. If I try toinvoke
parse and there is a type mismatch I get the following error:
com.bea.xml.XmlException: D:\RIXML\V2TestDoc.xml:0: error: The document isnot
a Research@http://www.rixml.org/2002/6/RIXML: document element local name
mismatch
expected Researchgot Product
at com.bea.xbean.store.Root.verifyDocumentType(Root.java:472)
at com.bea.xbean.store.Root.autoTypedDocument(Root.java:394)
at com.bea.xbean.store.Root.loadXml(Root.java:763)
atcom.bea.xbean.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:28
6)
atcom.bea.xbean.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:22
4)
at org.rixml.x2002.x6.rixml.ResearchDocument$Factory.parse(Unknown Source)
at Test.main(Test.java:21)
Exception in thread "main"
So how do I generically handle parsing when I don't know what type of rootnode
I'm going to get?
Thanks,
Joe