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Jasper report hibernate data source

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The data source which can be used in combination with jasper reports.

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  1. import net.sf.jasperreports.engine.JRDataSource;
  2. import net.sf.jasperreports.engine.JRException;
  3. import net.sf.jasperreports.engine.JRField;
  4. import java.util.*;
  5.  
  6. public class HibernateQueryResultDataSource implements JRDataSource {
  7.  
  8. 	private final Iterator<Map<String, Object>> iterator;
  9.  
  10. 	private Map<String, Object> currentValue;
  11.  
  12. 	/**
  13. 	 this is only for clarity
  14. 	 */
  15. 	private final String name;
  16.  
  17. 	public HibernateQueryResultDataSource(List<Map<String, Object>> list, String name) {
  18. 		this.iterator = list.iterator();
  19. 		this.name=name;
  20. 	}
  21.  
  22. 	public Object getFieldValue(JRField field) throws JRException {
  23. 		return currentValue.get(field.getName());
  24. 	}
  25.  
  26. 	public boolean next() throws JRException {
  27. 		currentValue = iterator.hasNext() ? iterator.next() : null;
  28. 		return (currentValue != null);
  29. 	}
  30.  
  31. 	public Iterator<Map<String, Object>> getIterator() {
  32. 		return iterator;
  33. 	}
  34.  
  35. }
  36.  
  37.  
  38. // A usage example 
  39.  
  40. private JRPdfExporter jRPdfExporter;
  41.  
  42. private boolean compileAndCreatePDF(final String pdfFileName, final JRDataSource ds){
  43.         try {
  44.             jRPdfExporter.setParameter(JRPdfExporterParameter.CHARACTER_ENCODING, "UTF-8");
  45.             jRPdfExporter.setParameter(JRPdfExporterParameter.FONT_MAP, fontMap);
  46.             final JasperPrint jasperPrint = JasperFillManager.fillReport(GeneratedPath + compiler.getRelevantEntryReportName(), new HashMap(0), ds);
  47.             jRPdfExporter.setParameter(JRPdfExporterParameter.JASPER_PRINT, jasperPrint);
  48.             jRPdfExporter.setParameter(JRPdfExporterParameter.OUTPUT_FILE_NAME, System.getProperty("java.io.tmpdir") + "/" + pdfFileName);
  49.             jRPdfExporter.exportReport();
  50.             return true;
  51.         } catch (Exception e) {
  52.             log.error(e);
  53.             return false;
  54.         }
  55.     }

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