Saving JasperReport Output to a Temporary PDF

JasperReports PDF Exporter does not support adding JavaScript to a PDF, so I need to use the iText PDF library to add the JavaScript and do some other processing. My previous examples showed how to push the PDF to the browser-- here's how to get it on the file system:

<%@page import="javax.sql.DataSource" %>
<%@page import="java.sql.Connection" %>
<%@page import="java.sql.CallableStatement" %>
<%@page import="java.sql.Statement" %>
<%@page import="java.sql.ResultSet" %>
<%@page import="java.util.Date" %>
<%@page import="javax.naming.InitialContext" %>
<%@page import="java.util.ArrayList" %>
<%@page import="java.lang.Integer" %>

<%@ page errorPage="error.jsp" %>
<%@ page import="net.sf.jasperreports.engine.*" %>
<%@ page import="net.sf.jasperreports.engine.util.*" %>
<%@ page import="net.sf.jasperreports.engine.export.*" %>
<%@ page import="java.util.*" %>
<%@ page import="java.io.*" %>

<%
   InitialContext context = new InitialContext();
   DataSource dataSource = (DataSource) context.lookup("java:comp/env/jdbc/myConnection/myOracleConnection");
   Connection connection = dataSource.getConnection();
        // Gets the .jasper file from the application location/reports/MyReport.jasper
        File reportFile = new File(application.getRealPath("/reports/MyReport.jasper")); 

        JasperReport jasperReport = (JasperReport)JRLoader.loadObject(reportFile.getPath());

        Map parameters = new HashMap();
        parameters.put("ReportTitle", "My Report");
        parameters.put("BaseDir", reportFile.getParentFile());
        
        JasperPrint jasperPrint =
                JasperFillManager.fillReport(
                        jasperReport,
                        parameters,
                        connection
);
 exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);

        JRPdfExporter exporter = new JRPdfExporter();

 // Get a pointer to the directory /tmp on the file system
        File d = new File("/tmp");

 // Now create a file with the prefix MyReport and suffix .pdf in /tmp.
        // The filename will be something like MyReport19309.pdf
        File f = File.createTempFile("MyReport", ".pdf", d) ;

 // Create an outputstream to pass to the JasperReports exporter
        OutputStream pout = new BufferedOutputStream(new FileOutputStream(f));
        exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, pout);

        exporter.exportReport();
        pout.flush(); // write any data left in the buffer
%>
Done outputting file.