import java.io.*;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRExporter;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.data.JRXmlDataSource;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JRExporterParameter;
import net.sf.jasperreports.engine.export.JRXlsExporter;


public class XmlDataReportProducer {

  public static byte[] compile(String jrxml, String xmldata, String select, String type) {
    try {
      ByteArrayInputStream bs_jrxml = new ByteArrayInputStream(jrxml.getBytes());
      ByteArrayInputStream bs_xml = new ByteArrayInputStream(xmldata.getBytes());

      JasperReport jr = JasperCompileManager.compileReport(bs_jrxml);
      JRXmlDataSource ds = new JRXmlDataSource(bs_xml, select);
      JasperPrint jp = JasperFillManager.fillReport(jr, null, ds);
      
	  if (type.equalsIgnoreCase("pdf"))
		return pdf(jp);
	  else if (type.equalsIgnoreCase("xls"))
		return xls(jp);
	  else
		return null;
    }catch (JRException e) {
      e.printStackTrace();
      return null;
    }
  }

  private static byte[] xls(JasperPrint jasperprint) throws JRException {
  	JRExporter exporter = new JRXlsExporter(); 
	ByteArrayOutputStream xls = new ByteArrayOutputStream(); 
	exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperprint);
	exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, xls);
	exporter.exportReport();
	return xls.toByteArray();
  }

  private static byte[] pdf(JasperPrint jasperprint) throws JRException {
  	return JasperExportManager.exportReportToPdf(jasperprint);
  }

}