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 ( paramValue == null
					&& !ParameterAccessor.isReportParameterExist( request,
							paramName )
					&& ( IBirtConstants.SERVLET_PATH_FRAMESET
							.equalsIgnoreCase( request.getServletPath( ) )
							|| this.configMap == null || !this.configMap
							.containsKey( paramName ) ) )
			{
				paramValue = this.getParameterDefaultValues(
						reportDesignHandle, paramName, options );
				parsedParameters.put( paramName, paramValue );
			}
		}
		return parsedParameters;
	}
	/**
	 * @return the parameter handle list
	 */
	private List getParameterList( ) throws ReportServiceException
	{
		IReportRunnable runnable = (IReportRunnable) this.reportDesignHandle
				.getDesignObject( );
		ModuleHandle model = null;
		if ( runnable != null )
			model = runnable.getDesignHandle( ).getModuleHandle( );
		if ( model != null )
			return model.getFlattenParameters( );
		else
			return null;
	}