Xerces DOM parser ignores EntityResolver providing local DTD for validation

[Rob Davis-5]

Hi, I want to read in and validate an XML file against a local DTD.

I have created a class based on EntityResolver which plugs into the Parser. 

However, this seems to be ignored because the parser still attempts to
connect over the internet to w3c which I do not want. I know this because of
the exception I get when it attempts (see below)

See also below my code.

Please advise

java.net.ConnectException: Connection refused: connect
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(Unknown Source)
        at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
        at java.net.PlainSocketImpl.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at sun.net.NetworkClient.doConnect(Unknown Source)
        at sun.net.www.http.HttpClient.openServer(Unknown Source)
        at sun.net.www.http.HttpClient.openServer(Unknown Source)
        at sun.net.www.http.HttpClient.<init>(Unknown Source)
        at sun.net.www.http.HttpClient.New(Unknown Source)
        at sun.net.www.http.HttpClient.New(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown
Source)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown 
Source)
        at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
        at
org.apache.xerces.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:986)
        at
org.apache.xerces.impl.XMLEntityManager.startEntity(XMLEntityManager.java:897)
        at
org.apache.xerces.impl.XMLEntityManager.startDTDEntity(XMLEntityManager.java:864)
        at
org.apache.xerces.impl.XMLDTDScannerImpl.setInputSource(XMLDTDScannerImpl.java:241)
        at
org.apache.xerces.impl.XMLDocumentScannerImpl$DTDDispatcher.dispatch(XMLDocumentScannerImpl.java:1001)
        at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:324)
        at
org.apache.xerces.parsers.XML11Configuration.parse(XML11Configuration.java:845)
        at
org.apache.xerces.parsers.XML11Configuration.parse(XML11Configuration.java:768)
        at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:108)
        at org.apache.xerces.parsers.DOMParser.parse(DOMParser.java:230)
        at SerializeTester.test(SerializeTester.java:30)
        at SerializeTester.main(SerializeTester.java:62)



import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;

import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;
import org.xml.sax.InputSource;
import org.w3c.dom.Document;
// Parser import
import org.apache.xerces.parsers.DOMParser;



public class SerializeTester 
{
  // File to read XML from
  private File inputXML;
  
  // File to serialize XML to
  private File outputXML;
  
  public SerializeTester(File inputXML)
  {
        this.inputXML = inputXML;
  }
  
  public void test(OutputStream outputStream) throws Exception
  {
        DOMParser parser = new DOMParser( );
        
        // Get the DOM tree as a Document object
        parser.parse(new InputSource(
        new FileInputStream(inputXML)));
        
    LocalDTDResolver LocalDTDResolver 
    = new LocalDTDResolver(
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd";, 
                                    new File("C:/svgdtd/svg11.dtd")
                             ); 

  
    parser.setEntityResolver( LocalDTDResolver );
         
        Document doc = parser.getDocument( );
        // Serialize
        
        org.w3c.dom.Element w3cSvgTextElement = doc.getElementById( 
"LABEL_OUTLINE"
);
          
  }
  
  public static void main(String[] args)
  {
        if (args.length != 2)
        {
          System.out.println(
            "Usage: java javaxml3.SerializeTester " +
            "[XML document to read] " +
            "[filename to write output to]");
          return;
        }
        try
        {
          SerializeTester tester =
            new SerializeTester(new File(args[0]));
          tester.test(new FileOutputStream(new File(args[1])));
        }
        catch (Exception e)
        {
      e.printStackTrace( );
        }
  }
}
        
        



 public class LocalDTDResolver implements EntityResolver {
         
   String mySystemIdToIntercept;
   File myLocalDtdPath;
   URL localDtdFileAsUrl;
         
   public LocalDTDResolver( String systemIdToIntercept, File localDtdPath )
throws MalformedURLException
   {
           mySystemIdToIntercept = systemIdToIntercept;
           myLocalDtdPath = localDtdPath;
         
       localDtdFileAsUrl = myLocalDtdPath.toURI().toURL();
   }
         
   public InputSource resolveEntity (String publicId, String systemId)
   {
     if (systemId.equals( mySystemIdToIntercept )) 
     {
       return new InputSource( localDtdFileAsUrl.toString() );
     }
     else
     {
       // use the default behaviour (?)
       return null;
     }
   }
 }
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