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, JRCloneable, JRElementDataset

public class JRBaseCrosstabDataset
extends JRBaseElementDataset
implements JRCrosstabDataset

Base implementation of crosstab input dataset.

Version:

$Id: JRBaseCrosstabDataset.java 5180 2012-03-29 13:23:12Z teodord $

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

See Also:

Serialized Form

Field Summary

protected boolean

dataPreSorted

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

datasetRun, incrementGroup, incrementTypeValue, incrementWhenExpression, resetGroup, resetTypeValue

Constructor Summary

JRBaseCrosstabDataset(JRCrosstabDataset dataset, JRBaseObjectFactory factory)

Method Summary

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, getDatasetRun, getIncrementGroup, getIncrementTypeValue, getIncrementWhenExpression, getResetGroup, getResetTypeValue

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.JRElementDataset

getDatasetRun, getIncrementGroup, getIncrementTypeValue, getIncrementWhenExpression, getResetGroup, getResetTypeValue

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

clone

Field Detail

dataPreSorted

protected boolean dataPreSorted

Constructor Detail

JRBaseCrosstabDataset

public JRBaseCrosstabDataset(JRCrosstabDataset dataset,
                             JRBaseObjectFactory factory)

Method Detail

collectExpressions

public void collectExpressions(JRExpressionCollector collector)

Specified by:

collectExpressions in interface JRElementDataset

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