Reg Merging Reports

[cu_bhavana]

Hi,

 

I have two JasperPrint objects containing the report data generated by 2 separate JRXML files.

 

Is there a way to merge them and view it using the ViewReport method of JasperViewer.

 

If so can you please send me a code snippet?

 

Thanks,

[contentengineer]

Sub-reports in the summary section of a new report. Set all other bands=0.

[C-Box]

Well perhaps the BATCH EXPORT Sample within the full Project (with demos) download can help you... but when I remember right, there where just some exporter usinig the JasperPrintList Parameter.

 

In my environment I use the following code, but not sure if it works for you also. The problem is, that the orientation should not differ between the merging objects.

 

But just take a look and feel free to modify if needed:

 

Code:

public DruckDokument mergeDruckDokumentList(ArrayList<DruckDokument> druckDokList) throws Exception {
    try {
      if (druckDokList != null && druckDokList.size() > 0) {
        long start = System.currentTimeMillis();
        
        JasperPrint mergedJRPrint = new JasperPrint();
        mergedJRPrint.setName("printedDocs"«»);
// NOTE: fixed size A4 here for merging, as no other formats used currently!!! 
        int pageHeight = 842;
        int pageWidth = 595;
        byte pageOrientation = JRReport.ORIENTATION_PORTRAIT;
        for (int i = 0; i < druckDokList.size(); i++) {
          DruckDokument aktDruckDok = druckDokList.get(i);
          JasperPrint jrPrint = null;
          switch (aktDruckDok.getFormat()) {
            case DruckDokument.FORMAT_JasperPrint:
              jrPrint = aktDruckDok.getJasperPrint();
              break;
            case DruckDokument.FORMAT_JasperPrintXml:
              jrPrint = convertXmlToJasperPrint(aktDruckDok.getJasperPrintXml().getUncompressedBinary());
              break;
            default:
              throw new Exception("Invalid  DruckDokumentFormat at MergeDruckDokumentList!"«»);

          }
          // try to adjust to the current Page-Size/Orientation  
          pageHeight = jrPrint.getPageHeight();
          pageWidth = jrPrint.getPageWidth();
          pageOrientation = jrPrint.getOrientation();

// former times we had to merge the JRReportFonts also! But the were deprecated some new JasperVersions :«»-)
//          java.util.List<JRReportFont> fontList = jrPrint.getFontsList();
//          for (int j = 0; j < fontList.size(); j++) {
//            if (!mergedJRPrint.getFontsMap().containsKey(fontList.get(j).getName())) {
//              mergedJRPrint.addFont(fontList.get(j));
//            }
//          }

          /** @todo Test it!!!! 2005-11-04 because of new JasperReports Styles*/
          Map mergeStyles = mergedJRPrint.getStylesMap();
          Map aktStyles = jrPrint.getStylesMap();
          Iterator<JRStyle> styleIt = aktStyles.values().iterator();
          while (styleIt.hasNext()){
            JRStyle aktStyle = styleIt.next();
            if (!mergeStyles.keySet().contains(aktStyle.getName())){
              mergedJRPrint.addStyle(aktStyle);
            }
          }
          java.util.List<JRPrintPage> pageList = jrPrint.getPages();
          for (int j = 0; j < pageList.size(); j++) {
            mergedJRPrint.addPage(pageList.get(j));
          }
        }

        mergedJRPrint.setPageHeight(pageHeight);
        mergedJRPrint.setPageWidth(pageWidth);
        mergedJRPrint.setOrientation(pageOrientation);
        byte[] jasperPrintXml = this.convertJasperPrintToXML(mergedJRPrint);
// we always return a surrounding Object called "DruckDokument" that contains the actual JRPrint (or JasperPrintXML)
        return new DruckDokument(DruckDokument.FORMAT_JasperPrintXml, jasperPrintXml);

      }
      else {
        throw new Exception("No DruckDokument in DruckDokumentListe!"«»);
      }
    }
    catch (Exception ex) {
// our own ExceptionHandler just formats the thrown ex
      throw ExceptionHandler.modifyException(ex);
    }

  }

 

Just be sure to merge the Styles also! When I remember right, this must be done since the merged doc need to know ALL Styles also!