IReport x VRaptor

private ClientOutput clientOutput;	
private JasperReport jasperReport;  
    private JasperPrint jasperPrint;
    private JasperViewer jasperViewer = null;
    private JRExporter exporter;
private HashMap relatorioparametros = new HashMap();

    public RelGerenciaisLogic(ClientOutput clientOutput) {
      this.clientOutput = clientOutput;
    }

@Viewless
public void visualizar() throws JRException, ParseException, IOException {
      ServletOutputStream os = clientOutput.getOutputStream();
      InputStream xmlReportStream = getClass().getResourceAsStream("IR001.jrxml");
      jasperReport = JasperCompileManager.compileReport(xmlReportStream);
      jasperPrint = JasperFillManager.fillReport(jasperReport, relatorioparametros, HibernateFactory.getConexaoJDBC());

      byte[] oRelatorio = JasperExportManager.exportReportToPdf(jasperPrint);
      os.write(oRelatorio);
      os.flush();
      os.close();
   }