printPgReport

    @SuppressWarnings({ "static-access", "serial", "rawtypes" })
    public static void printPgReport(final String reportName, final Map parameter) {
        emPg.getEntityManager().getTransaction().begin();
        final java.sql.Connection conn = emPg.getEntityManager().unwrap(java.sql.Connection.class);
        emPg.getEntityManager().getTransaction().commit();

        if (conn == null) {
            System.out.println("Error de conexion...\n");
            return;
        }

        StreamResource.StreamSource source = null;
        try {
            source = new StreamResource.StreamSource() {
                @SuppressWarnings("unchecked")
                public InputStream getStream() {
                    byte[] b = null;
                    try {
                        InputStream rep = getClass().getClassLoader().getResourceAsStream("/edu/ceac/app/reportes/"+reportName+".jasper");
                        System.out.println(rep);
                        if (rep != null) {
                            parameter.put("IMAGE_PATH", "/edu/ceac/app/reportes/images/");
                            parameter.put("SUBREPORT_PATH", "/edu/ceac/app/reportes/subreportes/");
                            JasperReport report = (JasperReport) JRLoader.loadObject(rep);
                            b = JasperRunManager.runReportToPdf(report, parameter, conn);
                            System.out.println(Paths.get(".").toAbsolutePath().normalize().toString());;
                            JasperPrint print = JasperFillManager.fillReport(report, parameter, conn);
                            JasperExportManager.exportReportToPdfFile(print, Paths.get(".").toAbsolutePath().normalize().toString()+"/reportName.pdf");
                        } else {
                            Notification.show("Atención!!!", "No se encontró el reporte...", Type.WARNING_MESSAGE);
                        }
                    } catch (JRException e) {
                        System.out.println("Error:\n");
                        e.printStackTrace();
                    }
                    return new ByteArrayInputStream(b);
                }
            };
        } catch(Exception e) {
            Notification.show("Atención!!!", "Ocurrió un problema al generar el archivo...", Type.WARNING_MESSAGE);
        }

        StreamResource resource = null;
        try {
            resource = new StreamResource(source, reportName + "_" + System.currentTimeMillis() + ".pdf");
        } catch (Exception e) {
            System.out.println("Error:\n");
            e.printStackTrace();
            return;
        }
        Window window = new Window();
        window.setWidth(70, Unit.PERCENTAGE);
        window.setHeight(90, Unit.PERCENTAGE);
        BrowserFrame extF = new BrowserFrame("PDF File", resource);
        extF.setWidth("100%");
        extF.setHeight("100%");
        window.setContent(extF);
        window.center();
        window.setModal(true);
        UI.getCurrent().addWindow(window);
    }