Package net.sf.jasperreports.crosstabs.base

Class JRBaseCrosstabDataset

java.lang.Object

net.sf.jasperreports.engine.base.JRBaseElementDataset

net.sf.jasperreports.crosstabs.base.JRBaseCrosstabDataset

All Implemented Interfaces:

Serializable, Cloneable, JRCrosstabDataset, DatasetRunHolder, JRCloneable, JRElementDataset

public class JRBaseCrosstabDataset
extends JRBaseElementDataset
implements JRCrosstabDataset

Base implementation of crosstab input dataset.

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	dataPreSorted

Fields inherited from class net.sf.jasperreports.engine.base.JRBaseElementDataset

datasetResetType, datasetRun, incrementGroup, incrementType, incrementWhenExpression, resetGroup

Constructor Summary

Constructors

Constructor	Description
JRBaseCrosstabDataset(JRCrosstabDataset dataset, JRBaseObjectFactory factory)

Method Summary

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

Methods inherited from class net.sf.jasperreports.engine.base.JRBaseElementDataset

clone, getDatasetResetType, getDatasetRun, getIncrementGroup, getIncrementType, getIncrementWhenExpression, getResetGroup

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

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

clone

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

getDatasetResetType, getDatasetRun, getIncrementGroup, getIncrementType, getIncrementWhenExpression, getResetGroup

Field Details

dataPreSorted

protected boolean dataPreSorted

Constructor Details

JRBaseCrosstabDataset

public JRBaseCrosstabDataset(JRCrosstabDataset dataset,
 JRBaseObjectFactory factory)

Method Details

collectExpressions

public void collectExpressions(JRExpressionCollector collector)

Specified by:

collectExpressions in interface JRElementDataset

Overrides:

collectExpressions in class JRBaseElementDataset

isDataPreSorted

public boolean isDataPreSorted()

Description copied from interface: JRCrosstabDataset

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.

Specified by:

isDataPreSorted in interface JRCrosstabDataset

Returns:

whether the crosstab data is pre-sorted