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## net.sf.jasperreports.crosstabs
Interface JRCrosstabDataset

All Superinterfaces:
  java.lang.Cloneable, JRCloneable, JRElementDataset

All Known Implementing Classes:
  JRBaseCrosstabDataset, JRDesignCrosstabDataset, JRFillCrosstab.JRFillCrosstabDataset

    public interface JRCrosstabDataset

extends JRElementDataset

Input dataset interface used by crosstabs.

Version:
  $Id: JRCrosstabDataset.java 3032 2009-08-27 11:32:28Z teodord $
Author:
  Lucian Chirita (lucianc@users.sourceforge.net)

Method Summary
`boolean` | `isDataPreSorted()` Returns whether the crosstab data is pre-sorted according to the crosstab's groups.

Methods inherited from interface net.sf.jasperreports.engine.JRElementDataset
`collectExpressions, getDatasetRun, getIncrementGroup, getIncrementType, getIncrementTypeValue, getIncrementWhenExpression, getResetGroup, getResetType, getResetTypeValue`

Methods inherited from interface net.sf.jasperreports.engine.JRCloneable
`clone`

Method Detail

### isDataPreSorted

    boolean isDataPreSorted()

  Returns whether the crosstab data is pre-sorted according to the crosstab's groups.

  The crosstab calculation engine can optimize the calculations if the data is sorted by the row groups and column groups. For example, if there are two row groups R1 and R2 (subgroup of R1) and three column groups C1, C2 and C3 the data should be sorted by R1, R2, C1, C2, C3.

  Returns:
    whether the crosstab data is pre-sorted

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