JSF + IReport [Urgentissimo]

public String gerarRelatorioBrowser(){
        IReportControlRaca ir = new IReportControlRaca();
        ir.gerarRelatorioBrowser();
        return "broseer";
    }

public class IReportControlRaca {

    private static final int PDF_BROWSER = 0x01;
    private static final int PDF_DOWNLOAD = 0x02;
    private IReportBeanRaca ireport;

    /**
     * gerarRelatorioBrowser
     */
    public void gerarRelatorioBrowser() {
        ireport = new IReportBeanRaca();
        List<Racas> listaRaca = ireport.gerarListRaca();
        JasperPrint jasper = ireport.gerarRelatorio(listaRaca);
        exportRelatorio(jasper, "blablabla", PDF_BROWSER);
    }

    /**
     * gerarRelatorioDownload
     */
    public void gerarRelatorioDownload() {
        ireport = new IReportBeanRaca();
        List<Racas> listaRaca = ireport.gerarListRaca();
        JasperPrint jasper = ireport.gerarRelatorio(listaRaca);
        exportRelatorio(jasper, "download", PDF_DOWNLOAD);
    }

    /**
     * Gerar pdf
     * @param  jasperPrinter
     * @param mode -  que indica como deve ser gerado o pdf
     */
    public void exportRelatorio(JasperPrint jasperPrinter, String fileName, int mode) {

        try {
            // @ outputStream   
            ByteArrayOutputStream pdfStream = new ByteArrayOutputStream();
            JasperExportManager.exportReportToPdfStream(jasperPrinter,
                    pdfStream);

            HttpServletResponse response = (HttpServletResponse) FacesContext.getCurrentInstance().getExternalContext().getResponse();
            // selecionando o modo que o pdf será processado
            switch (mode) {
                case PDF_BROWSER:
                    response.setContentType("application/pdf");
                    break;
                case PDF_DOWNLOAD:
                    response.setContentType("application/octet-stream");
                    response.setHeader("Content-Disposition",
                            "attachment; filename=" + fileName + ".pdf");
                    break;
                default:
            }
            response.setContentLength(pdfStream.size());
            ServletOutputStream flusher;
            flusher = response.getOutputStream();
            pdfStream.writeTo(flusher);
            flusher.flush();
            flusher.close();
            FacesContext.getCurrentInstance().responseComplete();
            pdfStream.close();
            pdfStream = null;

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

public class IReportBeanRaca {

    /**
     * gerarRelatorio
     */
    public JasperPrint gerarRelatorio(List<Racas> lista) {
        JasperPrint jasperPrint = null;
        String path = "/WEB-INF/relatorio/raca/RelatorioGeralRacas.jasper";
        String REAL_PATH = getRealPath(path);

        if (lista != null) {
            JRDataSource jrds = new JRBeanCollectionDataSource(lista);
            File reportFile = new File(REAL_PATH);
            try {
                HashMap parameters = new HashMap();
                jasperPrint = JasperFillManager.fillReport(reportFile.getPath(), parameters, jrds);
            } catch (JRException e) {
                System.out.println(e);
            }
        }
        return jasperPrint;
    }

    /**
     * Gerar lista com Alunos 
     */
    public List<Racas> gerarListRaca() {
        RacaBean raca = new RacaBean();
        List<Racas> listaRacas = new ArrayList<Racas>();       
        for (Iterator<Racas> it = raca.getRacasCadastradas().iterator(); it.hasNext();) {
           Racas racas = new Racas();
           racas = it.next();            
           listaRacas.add(racas);
        }
        return listaRacas;
    }

    /**
     * Retorna o real path
     */
    public static String getRealPath(String pathReport) {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        ServletContext context = (ServletContext) facesContext.getExternalContext().getContext();
        return context.getRealPath(pathReport);
    }
}