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
catch ( RemoteException e )
		{
			e.printStackTrace( );
			throw new ReportServiceException( e.getLocalizedMessage( ) );
		}
		if ( resultSetArray == null || resultSetArray.length <= 0 )
		{
			throw new ReportServiceException(
					"There is no result set available for extracting the data." ); 
		}
		return transformResultSetArray( resultSetArray );
	}
	public List getResultSetsMetadata( String docName, String instanceId,
			InputOptions options ) throws ReportServiceException
	{
		
		return null;
	}
	public void getImage( String docName, String imageId, OutputStream out,
			InputOptions options ) throws ReportServiceException
	{
		try
		{
			
			ReportEngineService.getInstance( ).renderImage( imageId, out );
		}
		catch ( RemoteException e )
		{
			throw new ReportServiceException( e.getLocalizedMessage( ) );
		}