Examples of org.jfree.report.ReportData

org.jfree.report.ReportData
A report data source is a ordered set of rows. For a report, we assume that the report dataset does not change while the report is processed. Concurrent updates will invalidate the whole precomputed layout. A report dataset will be accessed in a linear fashion. On certain points, the cursor will be reset to the a previously read position, and processing the data will restart from there. It is guaranteed, that the cursor will never be set to a row that is beyond the last row that has been read with 'next()'. If the cursor is out of range, any call to get must return 'null'. @author Thomas Morgner

    if (runtime == null)
    {
      return null;
    }


    final ReportData data = runtime.getData();
    if (data == null)
    {
      return null;
    }
    synchronized(data)
    {
      if (data.getCursorPosition() > 0)
      {
        return Boolean.FALSE;
      }
      if (data.isAdvanceable() == false)
      {
        return Boolean.TRUE;
      }
      return Boolean.FALSE;
    }

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   *
   * @return the value of the function.
   */
  public Object computeValue() throws DataSourceException
  {
    final ReportData data = getRuntime().getData();
    synchronized(data)
    {
      if (data.isAdvanceable())
      {
        return Boolean.TRUE;
      }
      return Boolean.FALSE;
    }

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  public static ReportDataRow createDataRow(final ReportDataFactory dataFactory,
                                            final String query,
                                            final DataSet parameters)
      throws DataSourceException, ReportDataFactoryException
  {
    final ReportData reportData = dataFactory.queryData(query, parameters);
    return new ReportDataRow(reportData);
  }

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        // totally new query here.
        final HashMap newParams = new HashMap();
        queryCache.put(query, newParams);


        final Parameters params = new Parameters(parameters);
        final ReportData newData = backend.queryData(query, params);
        newParams.put(params, newData);
        newData.setCursorPosition(ReportData.BEFORE_FIRST_ROW);
        return newData;
      }
      else
      {
        // Lookup the parameters ...
        final Parameters params = new Parameters(parameters);
        final ReportData data = (ReportData) parameterCache.get(params);
        if (data != null)
        {
          data.setCursorPosition(ReportData.BEFORE_FIRST_ROW);
          return data;
        }


        final ReportData newData = backend.queryData(query, params);
        parameterCache.put(params, newData);
        newData.setCursorPosition(ReportData.BEFORE_FIRST_ROW);
        return newData;
      }
    }
    catch (DataSourceException e)
    {

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    {
      final HashMap map = (HashMap) queries.next();
      final Iterator dataSets = map.values().iterator();
      while (dataSets.hasNext())
      {
        final ReportData data = (ReportData) dataSets.next();
        try
        {
          data.close();
        }
        catch (DataSourceException e)
        {
          // ignore, we'll finish up anyway ..
        }

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    if (runtime == null)
    {
      return null;
    }


    final ReportData data = runtime.getData();
    if (data == null)
    {
      return null;
    }
    synchronized(data)
    {
      if (data.getCursorPosition() > 0)
      {
        return Boolean.FALSE;
      }
      if (data.isAdvanceable() == false)
      {
        return Boolean.TRUE;
      }
      return Boolean.FALSE;
    }

View Full Code Here

   *
   * @return the value of the function.
   */
  public Object computeValue() throws DataSourceException
  {
    ReportData data = getRuntime().getData();
    synchronized(data)
    {
      if (data.isAdvanceable())
      {
        return Boolean.TRUE;
      }
      return Boolean.FALSE;
    }

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        // totally new query here.
        final HashMap newParams = new HashMap();
        queryCache.put(query, newParams);


        final Parameters params = new Parameters(parameters);
        final ReportData newData = backend.queryData(query, params);
        newParams.put(params, newData);
        newData.setCursorPosition(ReportData.BEFORE_FIRST_ROW);
        return newData;
      }
      else
      {
        // Lookup the parameters ...
        final Parameters params = new Parameters(parameters);
        final ReportData data = (ReportData) parameterCache.get(params);
        if (data != null)
        {
          data.setCursorPosition(ReportData.BEFORE_FIRST_ROW);
          return data;
        }


        final ReportData newData = backend.queryData(query, params);
        parameterCache.put(params, newData);
        newData.setCursorPosition(ReportData.BEFORE_FIRST_ROW);
        return newData;
      }
    }
    catch (DataSourceException e)
    {

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    {
      final HashMap map = (HashMap) queries.next();
      final Iterator dataSets = map.values().iterator();
      while (dataSets.hasNext())
      {
        final ReportData data = (ReportData) dataSets.next();
        try
        {
          data.close();
        }
        catch (DataSourceException e)
        {
          // ignore, we'll finish up anyway ..
        }

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  public static ReportDataRow createDataRow(final ReportDataFactory dataFactory,
                                            final String query,
                                            final DataSet parameters)
      throws DataSourceException, ReportDataFactoryException
  {
    final ReportData reportData = dataFactory.queryData(query, parameters);
    return new ReportDataRow(reportData);
  }

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