DOM parser problem with handling Windows UNC path for XML and DTD file

[Jianlin Chang]

It looks that there are problems with handling Windows UNC path (a path in the 
format of \\computer\share\filename).  I would like to seek help on how to 
solve the problem.

For the DocumentBuilder.parse() method, if a UNC path name is specified as the 
parameter, it will fail will error 'java.net.MalformedURLException: no 
protocol'.
I have to use 'DocumentBuilder.parse(new File(uncPath))'.  Then it got problems 
with find DTD file that the XML file uses:
<!DOCTYPE Users SYSTEM "Users.dtd">
The error is:
'Connection refused: connect'.  From the stack trace, it looks that it trys to 
find the DTD file using FTP.

I tried two approaches.  1. set validating to false, but it looks that it still 
try to find the DTD file.  2. Using EntityResolver to resolve the DTD file, but 
it looks that the EntityResolver is never called (the print statement doesn't 
print anything).  Why is this not called?

How can I solve the problem?

The sample code is enclosed.

xerces-j version I used is 2.0.2.

Thanks.


import javax.xml.parsers.*;
import org.w3c.dom.*;
import org.xml.sax.*;
import org.apache.xml.serialize.OutputFormat;
import org.apache.xml.serialize.Serializer;
import org.apache.xml.serialize.SerializerFactory;
import org.apache.xml.serialize.XMLSerializer;

public class TestDOM {
    static public void main(String args[])
    {
        try {
            DocumentBuilderFactory docBuilderFactory = 
DocumentBuilderFactory.newInstance();
            docBuilderFactory.setValidating(false);
            DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
            docBuilder.setEntityResolver(new MyEntityResolver());
//          Document m_domDocument = docBuilder.parse(args[0]);
            Document m_domDocument = docBuilder.parse(new 
java.io.File(args[0]));
        } catch (ParserConfigurationException exn) {
            System.err.println("Got ParserConfigurationException: " + 
exn.getMessage());
        } catch (SAXException exn) {
            System.err.println("Got SAXException: " + exn.getMessage());
        } catch (java.io.IOException exn) {
            System.err.println("Got IOException: " + exn.getMessage());
            exn.printStackTrace();
        }
    }
}

class MyEntityResolver implements EntityResolver {
   public InputSource resolveEntity(String publicId, String systemId)
       throws SAXException, java.io.IOException
   {
       System.out.println("MyEntityResolver: " + systemId);
       java.io.FileInputStream fs = new java.io.FileInputStream(systemId);
       return new InputSource(fs);
   }
}

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