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Posted to fop-users@xmlgraphics.apache.org by "M.Weiss" <m....@gmx.net> on 2002/08/27 12:06:13 UTC

Problem generating PDF from ECS-XMLDocument

Hi everybody,

I hope, you may help me again. ;-)

I want to create a PDF-Document, embedding FOP in a servlet. Until know I
got it up and running reading two files (XML-Data and XSL-Template), but now
I try to only read the XSL-Template from HDD and to create the XML-Structure
on the fly using apaches ECS. For this, I use the following code in the
execute-method of the servlet:

---
     public ActionForward executePost(ActionMapping mapping, AbstractForm
form,
          HttpServletRequest request, HttpServletResponse response)
          throws javax.servlet.ServletException, java.io.IOException
    {
        ByteArrayOutputStream out = new ByteArrayOutputStream();

        PdfErstellenForm peForm = (PdfErstellenForm)form;
        response.setContentType("application/pdf");

        Driver driver = new Driver();
        driver.setOutputStream(out);
        driver.setRenderer(Driver.RENDER_PDF);

        XMLDocument xmlDoc = new XMLDocument();
        XML Page = new XML("Page");
        XML Kopf = new XML("Kopf");
        XML Daten = new XML("Daten");
        Daten.addElement(new XML("Firma").addElement("123"));
        Daten.addElement(new XML("Firma").addElement("456"));
        Daten.addElement(new XML("Firma").addElement("789"));

        xmlDoc.addElement(Page.addElement(Kopf.addElement(Daten)));
        System.out.println("xml:"+xmlDoc.toString());
        // Results in:
        // <?xml version="1.0" standalone="yes"?>
        //
<Page><Kopf><Daten><Firma>123</Firma><Firma>456</Firma><Firma>789</Firma></D
aten></Kopf></Page>

        DOMFactory domFact = new DOMFactory();
        xmlDoc.output(domFact.getOutputStream());

        try
        {

          Transformer transformer =
TransformerFactory.newInstance().newTransformer(new StreamSource(new
FileInputStream(DEFAULT_XSL_TEMPLATE)));

           // following line is line 113, mentionned in the StackTrace
below:
          transformer.transform(new DOMSource(domFact.createDOM()), new
SAXResult(driver.getContentHandler()));
        }
        catch (Exception e)
        {
            e.printStackTrace();
            throw new ServletException(e);
        }

        byte[] content = out.toByteArray();
        response.setContentLength(content.length);
        response.getOutputStream().write(content);
        response.getOutputStream().flush();

        return null;
      }
---

When running the servlet using TomCat4.0, I got the following StackTrace:

building formatting object tree
building formatting object tree
javax.xml.transform.TransformerException
        at
org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.j
ava:1212)
        at
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:
479)
        at
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:
1118)
        at
de.heine.ree.gui.action.PdfErstellenAction2.executePost(PdfErstellenAction2.
java:113)
        at
de.heine.ree.gui.action.PrePostAction.executeAction(PrePostAction.java:64)
        at
de.heine.ree.gui.action.AbstractAction.perform(AbstractAction.java:51)
        at
org.apache.struts.action.ActionServlet.processActionPerform(ActionServlet.ja
va:1787)
        at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1586)
        at
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:510)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:243)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:190)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:170)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170
)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
        at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:
1027)
        at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125
)
        at java.lang.Thread.run(Thread.java:484)
---------
java.lang.NullPointerException
        at
org.apache.fop.fo.FOTreeBuilder.startDocument(FOTreeBuilder.java:167)
        at
org.apache.xalan.transformer.QueuedStartDocument.flush(QueuedStartDocument.j
ava:108)
        at
org.apache.xalan.transformer.ResultTreeHandler.flushPending(ResultTreeHandle
r.java:758)
        at
org.apache.xalan.transformer.ResultTreeHandler.startElement(ResultTreeHandle
r.java:245)
        at
org.apache.xalan.transformer.ResultTreeHandler.startElement(ResultTreeHandle
r.java:209)
        at
org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:
704)
        at
org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Transform
erImpl.java:2154)
        at
org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Transform
erImpl.java:2097)
        at
org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(Transformer
Impl.java:2029)
        at
org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.j
ava:1189)
        at
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:
479)
        at
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:
1118)
        at
de.heine.ree.gui.action.PdfErstellenAction2.executePost(PdfErstellenAction2.
java:113)
        at
de.heine.ree.gui.action.PrePostAction.executeAction(PrePostAction.java:64)
        at
de.heine.ree.gui.action.AbstractAction.perform(AbstractAction.java:51)
        at
org.apache.struts.action.ActionServlet.processActionPerform(ActionServlet.ja
va:1787)
        at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1586)
        at
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:510)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:243)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:190)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:170)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170
)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
        at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:
1027)
        at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125
)
        at java.lang.Thread.run(Thread.java:484)
javax.servlet.ServletException
        at
de.heine.ree.gui.action.PdfErstellenAction2.executePost(PdfErstellenAction2.
java:118)
        at
de.heine.ree.gui.action.PrePostAction.executeAction(PrePostAction.java:64)
        at
de.heine.ree.gui.action.AbstractAction.perform(AbstractAction.java:51)
        at
org.apache.struts.action.ActionServlet.processActionPerform(ActionServlet.ja
va:1787)
        at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1586)
        at
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:510)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:243)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:190)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:170)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170
)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
        at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:
1027)
        at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125
)
        at java.lang.Thread.run(Thread.java:484)

So, has anybody an idea where to look at ? As FOP writes out two lines
"building formatting object tree" I'm not quite sure, where problem results
from.

May anybody help me or, does have anybody some running sample-code ?


Thanks for ANY hint in advance.

Regards from south of germany,
Marcus

Re: Problem generating PDF from ECS-XMLDocument

Posted by "J.Pietschmann" <j3...@yahoo.de>.
M.Weiss wrote:
> I want to create a PDF-Document, embedding FOP in a servlet. Until know I
> got it up and running reading two files (XML-Data and XSL-Template), but now
> I try to only read the XSL-Template from HDD and to create the XML-Structure
> on the fly using apaches ECS. For this, I use the following code in the
> execute-method of the servlet:
...
> When running the servlet using TomCat4.0, I got the following StackTrace:
> 
> building formatting object tree
> building formatting object tree
...
The real error is here:
> ---------
> java.lang.NullPointerException
> org.apache.fop.fo.FOTreeBuilder.startDocument(FOTreeBuilder.java:167)

and this just "can't happen". Which FOP version are you using?
The two "building formatting object tree" messages are weird,
I'm tempted to say this is a multithreading problem. Do you get
the exception consistently?
Another possibility is that the XSLT processor got a serious hiccup,
though this is really unlikely. Nevertheless, try a more recent
version or another processor, like Saxon.

J.Pietschmann

Re: How to set a Japanies Font?

Posted by Balaji Loganathan <ba...@yahoo.com>.
Check fop documentation,
 there is an working example with complete
documentation.
Regards
Balaji

http://digital.yahoo.com.au - Yahoo! Digital How To
- Get the best out of your PC!

How to set a Japanies Font?

Posted by Raj Kumar Kundu <ra...@anshinsoft.com>.
Hi everybody,
    I want to generate a PDF file in Japanies font. Is this possible using
FOP?

Best Regards,
Raj