Source Code of ar.com.fdvs.dj.core.DJServletHelper

package ar.com.fdvs.dj.core;


import java.io.IOException;
import java.util.HashMap;
import java.util.Map;


import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRExporter;
import net.sf.jasperreports.engine.JRExporterParameter;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.export.JRHtmlExporterParameter;
import net.sf.jasperreports.j2ee.servlets.ImageServlet;
import ar.com.fdvs.dj.core.layout.LayoutManager;
import ar.com.fdvs.dj.domain.DynamicReport;
import ar.com.fdvs.dj.output.ReportWriter;
import ar.com.fdvs.dj.output.ReportWriterFactory;


public class DJServletHelper {


  /**
   * Generates the report as HTML and setups everything for a clean response (serving images as well).
   * You have to declare JasperReport servlet in web.xml (net.sf.jasperreports.j2ee.servlets.ImageServlet)
   *<br/><br/>
   * Web XML must be configured somehow like this:
   * <code><br/><br/>
  &lt;servlet&gt;<br/>
  &nbsp;  &lt;servlet-name&gt;image&lt;/servlet-name&gt;<br/>
  &nbsp; &lt;servlet-class&gt;net.sf.jasperreports.j2ee.servlets.ImageServlet&lt;/servlet-class&gt;<br/>
  &lt;/servlet&gt;<br/>


  &lt;servlet-mapping&gt;<br/>
  &nbsp;  &lt;servlet-name&gt;image&lt;/servlet-name&gt;<br/>
  &nbsp;  &lt;url-pattern&gt;/reports/image&lt;/url-pattern&gt;<br/>
  &lt;/servlet-mapping&gt;<br/>
   </code>
   *
   * @param request
   * @param response
   * @param imageServletUrl the URI to reach net.sf.jasperreports.j2ee.servlets.ImageServlet servlet (in example it would be "reports/image")
   * @param dynamicReport
   * @param layoutManager
   * @param ds
   * @param parameters Parameters for the DynamicReport
   * @param exporterParams Extra parameters for JasperReport's HTML exporter (HTMLJRHtmlExporter)
   * @throws JRException
   * @throws IOException
   */
    public static void exportToHtml(HttpServletRequest request, 
        HttpServletResponse response, 
        String imageServletUrl, 
        DynamicReport dynamicReport, 
        LayoutManager layoutManager, 
        JRDataSource ds, 
        Map parameters, 
        Map exporterParams) throws JRException, IOException
    {
      if (parameters == null)
        parameters = new HashMap();
      if (exporterParams == null)
        exporterParams = new HashMap();


      JasperPrint _jasperPrint = DynamicJasperHelper.generateJasperPrint(dynamicReport, layoutManager, ds,parameters);
      final ReportWriter reportWriter = ReportWriterFactory.getInstance().getReportWriter(_jasperPrint, DJConstants.FORMAT_HTML, parameters);
      parameters.put(JRHtmlExporterParameter.IMAGES_URI, request.getContextPath() + imageServletUrl);


      Map imagesMap = new HashMap();
          JRExporter exporter = reportWriter.getExporter();
          exporter.setParameters(exporterParams);


          exporter.setParameter(JRHtmlExporterParameter.IMAGES_MAP, imagesMap);
          exporter.setParameter(JRHtmlExporterParameter.IMAGES_URI, request.getContextPath() + "/" + imageServletUrl + "?image=");
          // Needed to support chart images:
          exporter.setParameter(JRExporterParameter.JASPER_PRINT, _jasperPrint);
          HttpSession session = request.getSession();
          session.setAttribute(ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE, _jasperPrint);
      session.setAttribute("net.sf.jasperreports.j2ee.jasper_print", _jasperPrint);


      //write generated HTML to the http-response (the one you got from the helper)
          reportWriter.writeTo(response);
    }


    public static void exportToHtml(HttpServletRequest request, 
        HttpServletResponse response, 
        String imageServletUrl, 
        JasperPrint jasperPrint, 
        Map exporterParams) throws JRException, IOException
        {
      if (exporterParams == null)
        exporterParams = new HashMap();
      
      exporterParams.put(JRHtmlExporterParameter.IMAGES_URI, request.getContextPath() + imageServletUrl);


      final ReportWriter reportWriter = ReportWriterFactory.getInstance().getReportWriter(jasperPrint, DJConstants.FORMAT_HTML, exporterParams);
      
      Map imagesMap = new HashMap();
      JRExporter exporter = reportWriter.getExporter();
      exporter.setParameters(exporterParams);
      
      exporter.setParameter(JRHtmlExporterParameter.IMAGES_MAP, imagesMap);
      exporter.setParameter(JRHtmlExporterParameter.IMAGES_URI, request.getContextPath() + "/" + imageServletUrl + "?image=");
      // Needed to support chart images:
      exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
      HttpSession session = request.getSession();
      session.setAttribute(ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE, jasperPrint);
      session.setAttribute("net.sf.jasperreports.j2ee.jasper_print", jasperPrint);
      
      //write generated HTML to the http-response (the one you got from the helper)
      reportWriter.writeTo(response);
        }
  
  
}
Source Code of ar.com.fdvs.dj.core.DJServletHelper

Related Classes of ar.com.fdvs.dj.core.DJServletHelper
