Package net.sf.jasperreports.crosstabs

Interface JRCrosstabDataset

All Superinterfaces:

Cloneable, DatasetRunHolder, JRCloneable, JRElementDataset

All Known Implementing Classes:

JRBaseCrosstabDataset, JRDesignCrosstabDataset, JRFillCrosstab.JRFillCrosstabDataset

public interface JRCrosstabDataset
extends JRElementDataset

Input dataset interface used by crosstabs.

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Method Summary

Modifier and Type	Method	Description
boolean	isDataPreSorted()	Returns whether the crosstab data is pre-sorted according to the crosstab's groups.

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

clone

Methods inherited from interface net.sf.jasperreports.engine.JRElementDataset

collectExpressions, getDatasetResetType, getDatasetRun, getIncrementGroup, getIncrementType, getIncrementWhenExpression, getResetGroup

Method Details

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