Scripted Data Set Fetches just once

evgeny

Hi and thank you for reading,

I have created a scripted dataset, which was based on the MyScriptedDataSet.java Example.
In the fetch method I call another method which returns me a LinkedList<Object[]>. The Object array has the same length as my data set has columns. So in the fetch method I do:

if (recordCount < rowComplete.size()) {
row.setColumnValue("col1", rowComplete.get(recordCount)[0]);
row.setColumnValue("col2", rowComplete.get(recordCount)[1]);
row.setColumnValue("col3", rowComplete.get(recordCount)[2]);
row.setColumnValue("col4", rowComplete.get(recordCount)[3]);
recordCount++;
}

So the fetch method gives a data row everytime the method is called and incremets the recordCount variable.

This java class is an Event Handler for the Scripted Data Set in the BIRT report.

The Report was retrieving the data without problems, but at some point the data couldn't be retrieved on the report side.

I build in some loggers. The data is stored in the rowComplete. I can read the data from the rowComplete object, even after I've executed the row.setColumnValue() method. But the report calles the fetch method just once. It doesnt go into the fetch method again. There is also no data, that arrives at neither in the Report Preview, nor in the Preview Results of the Data Set.

So the problem must be somewhere after the data is set to the row Object of IUpdatableDataSetRow. Apperently the report cant read this data and stops executing there without coming back to fetch again.

I also have some errors, when I execute the report in a webbrowser:

null ( 1 time(s) )
detail : org.eclipse.birt.report.engine.api.EngineException
at org.eclipse.birt.report.engine.internal.document.v4.ContainerExecutor.hasNextChild(ContainerExecutor.java:116)
at org.eclipse.birt.report.engine.internal.executor.wrap.WrappedReportItemExecutor.hasNextChild(WrappedReportItemExecutor.java:86)
at org.eclipse.birt.report.engine.internal.executor.wrap.WrappedReportItemExecutor.hasNextChild(WrappedReportItemExecutor.java:86)
at org.eclipse.birt.report.engine.layout.html.HTMLBlockStackingLM.layoutNodes(HTMLBlockStackingLM.java:62)
at org.eclipse.birt.report.engine.layout.html.HTMLStackingLM.layoutChildren(HTMLStackingLM.java:26)
at org.eclipse.birt.report.engine.layout.html.HTMLTableLM.layoutChildren(HTMLTableLM.java:132)
at org.eclipse.birt.report.engine.layout.html.HTMLAbstractLM.layout(HTMLAbstractLM.java:137)
at org.eclipse.birt.report.engine.layout.html.HTMLBlockStackingLM.layoutNodes(HTMLBlockStackingLM.java:70)
at org.eclipse.birt.report.engine.layout.html.HTMLPageLM.layout(HTMLPageLM.java:90)
at org.eclipse.birt.report.engine.layout.html.HTMLReportLayoutEngine.layout(HTMLReportLayoutEngine.java:99)
at org.eclipse.birt.report.engine.api.impl.RenderTask$PageRangeRender.render(RenderTask.java:600)
at org.eclipse.birt.report.engine.api.impl.RenderTask.render(RenderTask.java:221)
at org.eclipse.birt.report.service.ReportEngineService.renderReport(ReportEngineService.java:1461)
at org.eclipse.birt.report.service.BirtViewerReportService.getPage(BirtViewerReportService.java:204)
at org.eclipse.birt.report.service.actionhandler.AbstractGetPageActionHandler.doExecution(AbstractGetPageActionHandler.java:238)
at org.eclipse.birt.report.service.actionhandler.AbstractGetPageActionHandler.__execute(AbstractGetPageActionHandler.java:105)
at org.eclipse.birt.report.service.actionhandler.AbstractBaseActionHandler.execute(AbstractBaseActionHandler.java:90)
at org.eclipse.birt.report.soapengine.processor.AbstractBaseDocumentProcessor.__executeAction(AbstractBaseDocumentProcessor.java:47)
at org.eclipse.birt.report.soapengine.processor.AbstractBaseComponentProcessor.executeAction(AbstractBaseComponentProcessor.java:143)
at org.eclipse.birt.report.soapengine.processor.BirtDocumentProcessor.handleGetPage(BirtDocumentProcessor.java:87)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.birt.report.soapengine.processor.AbstractBaseComponentProcessor.process(AbstractBaseComponentProcessor.java:112)
at org.eclipse.birt.report.soapengine.endpoint.BirtSoapBindingImpl.getUpdatedObjects(BirtSoapBindingImpl.java:66)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.axis.providers.java.RPCProvider.invokeMethod(RPCProvider.java:397)
at org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:186)
at org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:323)
at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
at org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:454)
at org.apache.axis.server.AxisServer.invoke(AxisServer.java:281)
at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:699)
at org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.doPost(BirtSoapMessageDispatcherServlet.java:265)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.service(BirtSoapMessageDispatcherServlet.java:122)
at org.eclipse.equinox.http.registry.internal.ServletManager$ServletWrapper.service(ServletManager.java:180)
at org.eclipse.equinox.http.servlet.internal.ServletRegistration.handleRequest(ServletRegistration.java:90)
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:111)
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:59)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.eclipse.equinox.http.jetty.internal.HttpServerManager$InternalHttpServiceServlet.service(HttpServerManager.java:318)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:380)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:535)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:880)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:748)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:219)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
Caused by: java.lang.NullPointerException
at org.eclipse.birt.report.engine.internal.document.v4.ListingElementExecutor.doSkipToExecutor(ListingElementExecutor.java:79)
at org.eclipse.birt.report.engine.internal.document.v4.ContainerExecutor.prepareChildExecutor(ContainerExecutor.java:213)
at org.eclipse.birt.report.engine.internal.document.v4.ContainerExecutor.hasNextChild(ContainerExecutor.java:110)
... 62 more


Thank you for your help!

Evgeny

mwilliams

Hi Evgeny,

Is this the entire error stack? What version of BIRT are you using? Is this something you could reproduce in a simple example for me to run and test on?