Bug 162841 [regression]Drill-through link to document containing parameters failed in html and pdf
Description: Drill-through link to document containing parameters failed in html and pdf Steps to reproduce: 1. New a report with a report parameter, don't set default value for it. 2. Preview in Web Viewer, input parameter value and save the report document to c:\ 3. New another report, insert a label, set a drill through link on the label, link to the report document. 4. Preview in web viewer, html and pdf, click the link. Expected result: Link to target report. Actual result: In html, a dialog popped up and said "a runtime error has occurred" In pdf, a dialog popped up and said that report parameter has null value. In frameset servlet, both formats are ok. I found that if I set default value for the report parameter in target report, the issue will disappear.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ViewerAttributeBean.java
if ( curName != null
						&& curName.equalsIgnoreCase( configVarName ) )
				{
					paramName = parameter.getName( );
					break;
				}
			}
		}
		return paramName;
	}
	protected IViewerReportDesignHandle getDesignHandle(
			HttpServletRequest request )
	{
		IViewerReportDesignHandle design = null;
		IReportRunnable reportRunnable = null;
		
		boolean isValidDocument = ParameterAccessor
				.isValidFilePath( this.reportDocumentName );
		if ( isValidDocument )
		{
			IReportDocument reportDocumentInstance = ReportEngineService
					.getInstance( ).openReportDocument( this.reportDesignName,
							this.reportDocumentName,
							this.getModuleOptions( request ) );
			if ( reportDocumentInstance != null )
			{
				reportRunnable = reportDocumentInstance.getReportRunnable( );