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
renderOptions );
		
		return getPage( docName, pageNum + "", renderOptions, activeIds );
	}
	public ByteArrayOutputStream getPageByObjectId( String docName,
			String objectId, InputOptions renderOptions, List activeIds )
			throws ReportServiceException
	{
		
		return null;
	}
	public ByteArrayOutputStream renderReportlet( String docName,
			String objectId, InputOptions renderOptions, List activeIds )
			throws ReportServiceException
	{
		
		
		
		return getPageByObjectId( docName, objectId, renderOptions, activeIds );
	}
	public void renderReport( String docName, String pageRange,
			InputOptions renderOptions, OutputStream out )
			throws ReportServiceException
	{
		IReportDocument doc = ReportEngineService.getInstance( )
				.openReportDocument( getReportDesignName( renderOptions ),
						docName );
		HttpServletRequest request = (HttpServletRequest) renderOptions
				.getOption( InputOptions.OPT_REQUEST );
		Locale locale = (Locale) renderOptions