Problem in debuging jasper reports and ADF

Question

Hi
I am using JDeveloper 11.1.2.2.0. Inside I created Fusion Web Application ADF, and on the index page created Go button. Now I created Servlet with doGet methode and conncected it to Go button. It is working OK.
Now I want to run simple jasper report from servlet. Jasper report is based on empty dataset. Here is servlet code:
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
ServletOutputStream servletOutputStream =response.getOutputStream();
InputStream reportStream = getServletConfig().getServletContext()
.getResourceAsStream("C:/Users/myDomain/Desktop/Reporting/ReportPDFPrazan.jasper");
try
JasperRunManager.runReportToPdfStream(reportStream,servletOutputStream,null, new JREmptyDataSource());
response.setContentType(CONTENT_TYPE);
servletOutputStream.flush();
servletOutputStream.close();
catch (JRException e)
// display stack trace in the browser
StringWriter stringWriter = new StringWriter();
PrintWriter printWriter = new PrintWriter(stringWriter);
e.printStackTrace(printWriter);
response.setContentType("text/plain");
response.getOutputStream().print(stringWriter.toString());
When I hit Go button here what I get:
java.lang.NullPointerException
     at java.io.ObjectInputStream$PeekInputStream.read(ObjectInputStream.java:2265)
     at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2278)
     at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2749)
     at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:779)
     at java.io.ObjectInputStream.(ObjectInputStream.java:279)
     at net.sf.jasperreports.engine.util.ContextClassLoaderObjectInputStream.(ContextClassLoaderObjectInputStream.java:53)
     at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:214)
     at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:632)
     at net.sf.jasperreports.engine.JasperRunManager.runToPdfStream(JasperRunManager.java:428)
     at net.sf.jasperreports.engine.JasperRunManager.runReportToPdfStream(JasperRunManager.java:849)
     at view.com.lanaco.servlets.PrviServlet.doGet(PrviServlet.java:35)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
and so on(I can put whole stack if necery)
I also imported this libraries inside ViewControl project:
     Jasperreports-4.7.1.jar
     Commons-beanutils-1.8.0.jar
     Commons-collections-2.1.1.jar
     Commons-digester-2.1.jar
     Commons-logging-1.1.1.jar
     IText-2.1.7.jar
     Groovy-all-1.7.5.jar
     Poi-3.7-20101029.jar
Can someone help me with debuging. Please
Edited by: MarcusO on 2012.10.23 05:18

Answer 1

I found solution. It should be used like this:
InputStream reportStream = new FileInputStream(new File("C:/Users/myDomain/Desktop/Reporting/ReportPDFPrazan.jasper"));
So problem was in input stream. It works fine now.