I am using the wicket poi api to generate an excel file from a
PageableListView.
I just run into a bug in lines 67-76 of TableComponentAsXlsHandler.java:
cellExplorer becomes null already at the second iteration of the for loop
(see below)
TableParser parser = new TableParser(newSheet(), cellExporter);
if (tableComponent instanceof IPageable)
{
IPageable pageable = (IPageable)tableComponent;
for (int i = 0; i < pageable.getPageCount(); i++)
{
pageable.setCurrentPage(i);
parser.parse(tableComponent);
}
}
and we get a NullPointerException on line
org.wicketstuff.poi.excel.TableParser.doParse(TableParser.java:152) (see
below)
Do you have any suggestions on how to solve this problem ?
I am using wicket-poi-1.5-RC5.1.jar
SEVERE: Unexpected error occurred
java.lang.RuntimeException: Error while generating a xls file to table
component
at
org.wicketstuff.poi.excel.TableComponentAsXlsHandler.respond(TableComponentAsXlsHandler.java:91)
at
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:781)
at
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
at
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:97)
at
org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:255)
at
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:212)
at
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:283)
at
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:162)
at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:218)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at
org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:123)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at
org.apache.catalina.core.StandardHostValve.__invoke(StandardHostValve.java:171)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:931)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NullPointerException
at org.wicketstuff.poi.excel.TableParser.doParse(TableParser.java:152)
at org.wicketstuff.poi.excel.TableParser.parse(TableParser.java:76)
at
org.wicketstuff.poi.excel.TableComponentAsXlsHandler.respond(TableComponentAsXlsHandler.java:74)
... 26 more
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