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
}
		Object paramValueObj = null;
		if ( this.isDesigner
				&& ( IBirtConstants.SERVLET_PATH_RUN.equalsIgnoreCase( request
						.getServletPath( ) ) || IBirtConstants.SERVLET_PATH_PARAMETER
						.equalsIgnoreCase( request.getServletPath( ) ) )
				&& this.configMap != null
				&& this.configMap.containsKey( paramName ) )
		{
			
			paramValueObj = this.configMap.get( paramName );
		}
		else if ( this.parameterMap != null
				&& this.parameterMap.containsKey( paramName ) )
		{
			
			paramValueObj = this.parameterMap.get( paramName );
		}
		if ( paramValueObj == null )
			return paramValue;
		
		if ( paramValueObj instanceof Date )
			return paramValueObj;
		else
			return paramValueObj.toString( );
	}
	/**
	 * get parsed parameters as string.
	 * 
	 * @param parameterList