Pramodh --
The entity resolver is not called by your code but by the parser itself when
it encounters the !DOCTYPE declaration. You shouldn't be calling any of the
setXXX methods in DTDResolver yourself.
Does your DTDResolver.resolveEntity method ever get called?
Does the java statement
System.out.println("publicID is: " + this.publicId);
result in any output?
I'd also add in a System.out.println() for the systemID.
Step 1 is to determine if the method is even getting called. If so, we'll
need to look at both arguments passed into that method.
HTH,
Gary
> -----Original Message-----
> From: Pramodh Peddi [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, December 17, 2003 8:29 AM
> To: [EMAIL PROTECTED]
> Subject: resolving DTDs while transforming
>
>
> Hi,
> I posted a requestion and I did not get any response back. I
> thought it was
> difficult to understand what I asked in my previous post.
> Here is a better way of explaining my question(s):
> I have an xml source, to be transformed, which has a relative
> DTD reference
> (just the dtd filename is specified), like:
> <?xml version="1.0" encoding="iso-8859-1"?>
> <!DOCTYPE CONTENT_FEED SYSTEM "myDTD.dtd">
> <root>
> ......
> ....
> </root>
>
> The problem is myDTD.dtd is available NEITHER in the
> classpath NOR where the
> class file is located. But, it is available in a
> http-accessible location,
> like: http://myserver.com/dtd/myDTD.dtd.
>
> So, I would like to tell the parser to consider
> "http://myserver.com/dtd/myDTD.dtd"; instead of myDTD.dtd to
> validate the
> source xml. (I know thats a stupid way of referring to a DTD,
> but thats the
> customer's feed and they cannot change it).
>
> I know this may not be related to transformation, but was
> wondering if you
> kindly can help me.
>
> Can any one help me get an approach.
>
> Here is what I am doing: I am using Java1.4 API to transform.
> I am using
> SAXSource to provide the xml source to the transformer. I am using
> EntityResolver interface to resolve the DTD (to let the
> parser consider the
> http://myserver.com/dtd/myDTD.dtd in place of myDTD.dtd,
> mentioned in the
> source xml). I just have an idea how to do, but it does not
> work and no
> wonder because I do not yet clearly understand how
> EntityResolver works.
> Questions Like: What is the role of systemID, publicID, when
> does the parser
> try to resolve entities (like DTDs), etc. Can anyone give a clear
> understanding of how it works.
>
> I hesitate giving the code, because the email becomes too large and
> incognizable. But, in case it helps you help me better, here
> is the code:
>
> *********************************************code*************
> **************
> ************
> public class SELTransformationService{
>
> private String stylesheet;
> private String fileName = null;
> private String dtdURL = null;
>
> private void transform(String metadata, String stylesheet,
> ServiceRequest req, ServiceResponse res){
>
> //System.out.println("TRANSFORM USING STRING");
>
> try {
>
> TransformerFactory tFactory = TransformerFactory.newInstance();
>
> Transformer transformer = tFactory.newTransformer(new StreamSource(new
> URL(stylesheet).openStream()));
>
> InputStream inputStream =
> req.getContentObject().getMetadataInputStream();
>
> OutputStream outputStream =
> req.getContentObject().getMetadataOutputStream();
>
> SAXParserFactory pfactory= SAXParserFactory.newInstance();
>
> pfactory.setValidating(true);
>
> // Get an XMLReader.
>
> XMLReader reader = pfactory.newSAXParser().getXMLReader();
>
> //create a resolver to resolve the DTD in the source xml
>
> //EntityResolver resolver = new DTDResolver();
>
> reader.setEntityResolver(new DTDResolver());
>
> DTDResolver resolver = (DTDResolver)reader.getEntityResolver();
>
> resolver.setPublicId(this.dtdURL);
>
> SAXSource source = new SAXSource(reader,
>
> new InputSource(new InputStreamReader(inputStream)));
>
> source.setSystemId("myDTD.dtd");
>
> transformer.transform(source, new StreamResult(new
> OutputStreamWriter(outputStream, "iso-8859-1")));
>
> outputStream.close();
>
> req.getContentObject().commit();
>
> res.send(req.getContentObject());
>
> log.info(fileName + " - OBJECT SENT OUT OF TRANSFORMATION-2");
>
> } catch (Exception ex) {
>
> res.error(req.getContentObject(), "Exception sending message
> to bus.");
>
> ex.printStackTrace();
>
> }
>
> }//end SELTransformationService classclass DTDResolver implements
> EntityResolver {
>
> String publicId = null;
>
> public void setPublicId(String publicId){
>
> this.publicId = publicId;
>
> System.out.println("Setting publicID");
>
> }
>
> public String getPublicId(){
>
> System.out.println("Getting publicId");
>
> return this.publicId;
>
> }
>
> public InputSource resolveEntity (String publicId, String systemId){
>
> InputStream inputStream = null;
>
> InputSource source = null;
>
> try{
>
> System.out.println("publicID is: " + this.publicId);
>
> if(StringUtils.isNotEmpty(this.publicId)){
>
> URL url = new URL(this.publicId);
>
> inputStream = url.openStream();
>
> System.out.println("got the inputstream");
>
> source = new InputSource(new InputStreamReader(inputStream));
>
> }else{
>
> System.out.println("publicId is not specified!!!");
>
> }
>
> }catch(Exception e){
>
> }
>
> return source;
>
> }
>
> }//end DTDResolver class
> **********************************************code************
> **************
> **************
>
> When I do what is given above, the transformed string has
> empty xml (has
> only xml header). I am sure I am doing something wrong. Can
> any one tell me
> what is wrong in that. And making me understand how
> EntityResolver works
> makes me feel lot better.
>
> Thanks,
>
> Pramodh.
>
