Bug 199714 NPE with invalid url[0002]
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/BirtViewerReportService.java
if ( task != null )
			{
				Collection params = task.getParameterDefns( true );
				return convertEngineParameters( params, includeGroups );
			}
		}
		finally
		{
			if ( task != null )
				task.close( );
		}
		return null;
	}
	/**
	 * @see org.eclipse.birt.report.service.api.IViewerReportService#getParameterValues(java.lang.String,
	 *      org.eclipse.birt.report.service.api.InputOptions)
	 * @deprecated
	 */
	public Map getParameterValues( String docName, InputOptions options )
			throws ReportServiceException
	{
		IReportDocument doc = ReportEngineService.getInstance( )
				.openReportDocument( getReportDesignName( options ), docName,
						getModuleOptions( options ) );
		Map paramValues = doc.getParameterValues( );
		doc.close( );
		return paramValues;
	}
	/**
	 * @see org.eclipse.birt.report.service.api.IViewerReportService#getSelectionListForCascadingGroup(org.eclipse.birt.report.service.api.IViewerReportDesignHandle,