Rasterizing via API

[VA...@LILLY.COM]

Hi all,

I'm new to this list, so hopefully I'm not rehashing something that's 
already been answered.

I am attempting to create a Servlet that will be able to transcode an 
arbitrary SVG String into a PNG.  I took a look at the source for the 
command line rasterizer utility, and based my work from that. (my source 
pasted below)

The "meat" of this servlet takes place in the writeImage method. 
Unfortunately, when I run this, I get a "java.lang.NoSuchMethodError". 
(pasted below also).  I've taken a quick look through the affected 
classes, but I am at a loss as to what is happening here (I'm not very 
familiar with all the API's at work here yet)

Thanks,
Jason Vasquez


Source to the servlet:
        public void doGet(HttpServletRequest req, HttpServletResponse res)
        throws ServletException, IOException {
                String mimeType = "image/png";

                res.setContentType(mimeType);

                TranscoderFactory factory = 
ConcreteTranscoderFactory.getTranscoderFactoryImplementation();
                Transcoder t = factory.createTranscoder(mimeType);

                String inputSVG = getSVG();
                OutputStream os = res.getOutputStream();
                writeImage(t, inputSVG, os);

                os.flush();
                os.close();

        }


        private void writeImage(Transcoder t, String svgInput, 
OutputStream ostream) throws IOException{
                InputSource isource = new InputSource(new 
StringReader(svgInput));

                //Buffer the output for performance
                BufferedOutputStream bos = new 
BufferedOutputStream(ostream);

                t.transcodeToStream(isource, bos);
                bos.flush();
        }


The error message:
java.lang.NoSuchMethodError
        at 
org.apache.batik.dom.util.DocumentFactory.createDocument(DocumentFactory.java:108)
        at 
org.apache.batik.dom.svg.SVGDocumentFactory.createDocument(SVGDocumentFactory.java:59)
        at 
org.apache.batik.refimpl.transcoder.AbstractTranscoder.transcodeToStream(AbstractTranscoder.java:63)
        at 
com.lilly.cmit.analysis.client.web.PNGReportViewerServlet.writeImage(PNGReportViewerServlet.java:43)
        at 
com.lilly.cmit.analysis.client.web.PNGReportViewerServlet.doGet(PNGReportViewerServlet.java:29)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at 
org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404)
        at org.apache.tomcat.core.Handler.service(Handler.java:286)
        at 
org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
        at 
org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797)
        at 
org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)
        at 
org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:210)
        at 
org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
        at 
org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498)
        at java.lang.Thread.run(Thread.java:484)

Re: Rasterizing via API

[Thierry Kormann <Th...@sophia.inria.fr>]

Hi,

VASQUEZ_JASON@LILLY.COM wrote:
> I am attempting to create a Servlet that will be able to transcode an
> arbitrary SVG String into a PNG.  I took a look at the source for the command
> line rasterizer utility, and based my work from that. (my source pasted below)

Well, the current batik cvs base contains a new API for transcoders which must
be much easier to use and contains bug fixes. We hope to provide a new public
(development) release of batik in few days.

I propose that you will start working on this new version instead of the current
one which is (my fault) really not user-friendly.

Thanks for your comments,
Thierry.

-- 
Thierry Kormann
email: Thierry.Kormann@sophia.inria.fr  http://www.inria.fr/koala/tkormann/
Koala/Dyade/Bull @ INRIA - Sophia Antipolis