DOM and Validation

[Jared Davis]

Hi,
I'm trying to parse some XML files (which will be written by hand)
and validate them against a schema (which will be somewhere on the
end user's system, and found using getResource).  So, I am thinking
that I don't want to have the XML files themselves specify an
explicit location, but instead I'd like to just load the schema
manually and check the files against it.
I don't seem to be having much luck with this.  Here's what I'm
trying to do:
  // Open a stream to the file to read.
  InputStream in = ...;
  // Create a Schema object with my xsd file
  SchemaFactory scf = 
SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
  Schema schema = scf.newSchema(getClass().getResource("fog.xsd"));
  // Create a DocumentBuilderFactory and set its schema
  DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
  dbf.setSchema(schema);
  // Create a DocumentBuilder and parse the file.
  DocumentBuilder db = dbf.newDocumentBuilder();
  Document doc = db.parse(in);

Anyway, when I run this code, I get the attached error trace.  The
error will not occur if I don't set the schema.  Perhaps I'm not
doing this in the proper way?
Thanks,
   Jared

java.lang.IllegalStateException
        at 
com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl$3.checkState(ValidatorHandlerImpl.java:411)
        at 
com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl$3.getElementTypeInfo(ValidatorHandlerImpl.java:441)
        at 
com.sun.org.apache.xerces.internal.jaxp.JAXPValidatorComponent$SAX2XNI.elementAug(JAXPValidatorComponent.java:299)
        at 
com.sun.org.apache.xerces.internal.jaxp.JAXPValidatorComponent$SAX2XNI.endElement(JAXPValidatorComponent.java:291)
        at com.sun.org.apache.xerces.internal.jaxp.XNI2SAX.endElement(XNI2SAX.java:163)
        at com.sun.org.apache.xerces.internal.jaxp.validation.XNI2SAXEx.endElement(XNI2SAXEx.java:108)
        at 
com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.endElement(XMLSchemaValidator.java:818)
        at 
com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl.endElement(ValidatorHandlerImpl.java:339)
        at com.sun.org.apache.xerces.internal.jaxp.XNI2SAX.endElement(XNI2SAX.java:163)
        at 
com.sun.org.apache.xerces.internal.jaxp.JAXPValidatorComponent.endElement(JAXPValidatorComponent.java:206)
        at 
com.sun.org.apache.xerces.internal.xinclude.XIncludeHandler.endElement(XIncludeHandler.java:790)
        at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
        at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1685)
        at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
        at 
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
        at 
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
        at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:248)
        at 
com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:292)

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