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
}
						
						paramName = getParameterName( paramName );
						ScalarParameterHandle parameter = (ScalarParameterHandle) findParameter( paramName );
						
						
						if ( paramValue != null && parameter != null )
						{
							
							String typeVarName = configVar.getName( )
									+ "_" + IBirtConstants.PROP_TYPE; 
							ConfigVariable typeVar = handle
									.findConfigVariable( typeVarName );
							
							String dataType = parameter.getDataType( );
							String cachedDateType = null;
							if ( typeVar != null )
								cachedDateType = typeVar.getValue( );
							
							if ( cachedDateType == null
									|| !cachedDateType
											.equalsIgnoreCase( dataType ) )
							{
								continue;
							}
							try
							{
								
								if ( !DesignChoiceConstants.PARAM_TYPE_STRING
										.equalsIgnoreCase( dataType ) )