FOP in a servlet

[VIRUEGA Pierre <pi...@sofrecom.com>]

Hello,
I need some help about how to embed FOP in a servlet.
I know there is an example on the FOP site but it is only with one parameter,
the same as:
Fop foo.fo foo.pdf

and what I want to do is similar to:
Fop -xml foo.xml -xsl foo.fo foo.pdf

I found the following code on the FOP FAQ as an example =

   response.setContentType("application/pdf");
   Driver d = new Driver();
   // this doesn't compile
   //Driver.setRenderer(RENDER_PDF);

   InputHandler inputHandler = new XSLTInputHandler(xmlFile, xslFile);
   XMLReader parser = inputHandler.getParser(); // error at getParser
   d.buildFOTree(parser, inputHandler.getInputSource());
   d.format();
   d.setOutputStream(response.getOutputStream());
   d.render();

But it failed  with the message =
java.lang.NullPointerException
        at org.apache.fop.apps.InputHandler.createParser(InputHandler.java:58)
        at
org.apache.fop.apps.XSLTInputHandler.getParser(XSLTInputHandler.java:117)
        at NewFopServlet.buildPDFDoc(NewFopServlet.java:157)
        at NewFopServlet.doGet(NewFopServlet.java:96)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)

Does anyone has solved the same problem?
Thks
Pierre

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