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
String param = DataUtil.getString( params.nextElement( ) );
			String paramName = ParameterAccessor.isDisplayText( param );
			if ( paramName != null )
			{
				displayTexts.put( paramName, ParameterAccessor.getParameter(
						request, param ) );
			}
		}
		return displayTexts;
	}
	/**
	 * Gets the module option map from the request.
	 * 
	 * @param request
	 *            the request
	 * @return the module options
	 */
	protected Map getModuleOptions( HttpServletRequest request )
	{
		Map options = new HashMap( );
		options.put( IModuleOption.RESOURCE_FOLDER_KEY, ParameterAccessor
				.getResourceFolder( request ) );
		return options;
	}
	/**
	 * @return the parametersAsString
	 */
	public Map getParametersAsString( )
	{
		return parametersAsString;