Bug 138828 Export data column are disordered
Steps to reproduce: 1.Add a sample data source and a data set with table "CUSTOMERS" 2.Preview in Web Viewer 3.Click "Export data", choose columns "CUSTOMERNAME","PHONE","CITY","STATE" to be exported, click "OK" Expected result: The exported columns is alphabetic order or the same order as selected columns Actual result: The exported columns is disordered. they are "STATE","CITY","CUSTOMERNAME","PHONE".
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/BirtViewerReportService.java
String reportDesignName = design.getFileName( );
		try
		{
			IGetParameterDefinitionTask task = getParameterDefinitionTask( reportDesignName );
			return task.getSelectionList( paramName );
		}
		catch ( EngineException e )
		{
			throw new ReportServiceException( e.getLocalizedMessage( ) );
		}
	}
	public long getPageNumberByBookmark( String docName, String bookmark,
			InputOptions options ) throws ReportServiceException
	{
		IReportDocument doc = ReportEngineService.getInstance( )
				.openReportDocument( getReportDesignName( options ), docName );
		long pageNumber = doc.getPageNumber( bookmark );
		doc.close( );
		return pageNumber;
	}
	public long getPageNumberByObjectId( String docName, String objectId,
			InputOptions options ) throws ReportServiceException
	{
		
		return 0;
	}
	public void runAndRenderReport( IViewerReportDesignHandle design,
			String outputDocName, InputOptions options, Map parameters,
			OutputStream out, List activeIds ) throws ReportServiceException
	{