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
public String getReportTitle( ) throws ReportServiceException
	{
		String title = reportTitle;
		if ( reportDesignHandle != null )
		{
			Object design = reportDesignHandle.getDesignObject( );
			if ( design instanceof IReportRunnable )
			{
				IReportRunnable runnable = (IReportRunnable) design;
				String designTitle = (String) runnable
						.getProperty( IReportRunnable.TITLE );
				if ( designTitle != null && designTitle.trim( ).length( ) > 0 )
					title = designTitle;
			}
		}
		return title;
	}
	/**
	 * Get Display Text of select parameters
	 * 
	 * @param request
	 * @return Map
	 */
	protected Map getDisplayTexts( Map displayTexts, HttpServletRequest request )
	{
		if ( displayTexts == null )
			displayTexts = new HashMap( );
		Enumeration params = request.getParameterNames( );
		while ( params != null && params.hasMoreElements( ) )
		{