Bug 154178 Support projectFolder in BIRT viewer
If the report supports projectFolder, the viewer also need to enhance for this feature.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ViewerAttributeBean.java
if ( !ParameterAccessor.isValidFilePath( this.reportDesignName ) )
			{
				this.exception = new ViewerException(
						ResourceConstants.GENERAL_EXCEPTION_REPORT_ACCESS_ERROR,
						new String[]{this.reportDesignName} );
			}
			else
			{
				try
				{
					
					File file = new File( this.reportDesignName );
					if ( file.exists( ) )
					{
						reportRunnable = ReportEngineService.getInstance( )
								.openReportDesign( this.reportDesignName );
					}
					else if ( !ParameterAccessor.isWorkingFolderAccessOnly( ) )
					{
						
						
						this.reportDesignName = ParameterAccessor.getParameter(
								request, ParameterAccessor.PARAM_REPORT );
						InputStream is = request.getSession( )
								.getServletContext( ).getResourceAsStream(
										this.reportDesignName );
						reportRunnable = ReportEngineService.getInstance( )
								.openReportDesign( is );
					}