Dashbuilder throws NullPointerException while exporting data containing null to MS Excel

Issue

• Exporting data to MS Excel when data contains null;

• Dasbuilder throws NullPointerException while exporting data containing null to MS Excel:

  10:25:04,559 ERROR [org.jboss.dashboard.error.ErrorManager] (ajp-/10.10.10.10:8080-10) UNEXPECTED ERROR.
  Thread id=ajp-/10.10.10.10:8080-10
  Thread begin date=Sun Oct 26 10:25:04 IST 2014
  Thread group=main
  Request URL=/dashbuilder/Controller?idPanel=4677&_fb=default_table_viewer&_fp=0&pAction=_factory&dataExportFormat=xlsx&csrf=45576226
  Request IP=20.20.20.20
  Request date=Sun Oct 26 10:25:04 IST 2014
  Request header:user-agent=Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)
  Request header:referer=https://localhost:8080/dashbuilder/workspace/en_GB/0/4007?csrf=70298554
  Request header:cookie=JSESSIONID=jTSEVMrI6v-BlbeN80nJEXn4.cc0dd918-7686-348f-b8a8-827b4747abfc; dashbuilderNavigationPoint=en_GB-33b-0; region_left_web_2_0_cookie=1
  Request param:csrf=45576226
  Request param:idPanel=4677
  Request param:_fb=default_table_viewer
  Request param:_fp=0
  Request param:pAction=_factory
  Request param:dataExportFormat=xlsx
  Tx id=128679088
  Tx Isolation=2
  Tx Auto commit=false
  Error id=1411718732555
  Error date=Sun Oct 26 10:25:04 IST 2014
  Error stack trace=java.lang.NullPointerException
      at org.jboss.dashboard.displayer.table.ExportTool.exportExcel(ExportTool.java:150)
      at org.jboss.dashboard.ui.components.table.TableHandler.actionExportData(TableHandler.java:338)
      at org.jboss.dashboard.ui.components.table.TableViewer.actionExportData(TableViewer.java:59)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:601)
      at org.jboss.dashboard.ui.components.BeanHandler.handle(BeanHandler.java:152)
          ...