Bug 141951 Export data throw NPE when target document doesn't exist
Description: Export data doesn't work when deploy birt in WebSphere6 Steps to reproduce: 1. Deploy birt in WebSphere6 2. Preview report and click Export Data Result: java.lang.NullPointerException Stack Trace: org.apache.axis.AxisFault.makeFault(AxisFault.java:101) org.eclipse.birt.report.soapengine.processor.AbstractBaseComponentProcessor.process(Unknown Source) org.eclipse.birt.report.soapengine.endpoint.BirtSoapBindingImpl.getUpdatedObjects(Unknown Source) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/BirtViewerReportService.java
outputDocName, locale, (HashMap) parsedParams );
		}
		catch ( RemoteException e )
		{
			e.printStackTrace( );
			throw new ReportServiceException( e.getLocalizedMessage( ) );
		}
		return outputDocName;
	}
	public IViewerReportDesignHandle getReportDesignHandle( String docName,
			InputOptions options )
	{
		IReportDocument doc = ReportEngineService.getInstance( )
				.openReportDocument( getReportDesignName( options ), docName );
		String fileName = doc.getReportRunnable( ).getReportName( );
		doc.close( );
		
		IViewerReportDesignHandle design = new BirtViewerReportDesignHandle(
				null, fileName );
		return design;
	}
	
	public ByteArrayOutputStream getPage( String docName, String pageID,
			InputOptions renderOptions, List activeIds )
			throws ReportServiceException
	{
		IReportDocument doc = ReportEngineService.getInstance( )
				.openReportDocument( getReportDesignName( renderOptions ),
						docName );
		HttpServletRequest request = (HttpServletRequest) renderOptions