net.sf.reportengine.core.steps

Class ExternalSortPreparationStep

java.lang.Object

net.sf.reportengine.core.algorithm.steps.AbstractAlgoMainStep<T,U,V>

net.sf.reportengine.core.AbstractReportStep<List<File>,String,String>

net.sf.reportengine.core.steps.ExternalSortPreparationStep

All Implemented Interfaces:

AlgorithmMainStep<List<File>,String,String>

public class ExternalSortPreparationStep
extends AbstractReportStep<List<File>,String,String>

Author:

dragos balan

Field Summary

Fields inherited from class net.sf.reportengine.core.AbstractReportStep

GRAND_TOTAL_GROUPING_LEVEL

Constructor Summary

Constructors

Constructor and Description
ExternalSortPreparationStep()
ExternalSortPreparationStep(int maxRowsInMemory)

Method Summary

Modifier and Type	Method and Description
StepResult<String>	execute(NewRowEvent newRow, StepInput stepInput) callback method called for each row
StepResult<String>	exit(StepInput stepInput) called when finishing the algorithm execution
StepResult<List<File>>	init(StepInput stepInput) this method is called only once for a report and represents the construction step where you can define the keys and values used inside the execute method.
File	saveToFile(List<NewRowEvent> rowsList) saves the given list into a temporary file

Methods inherited from class net.sf.reportengine.core.AbstractReportStep

computeAggLevelForCalcRowNumber, computeCalcRowNumberForAggLevel, getCalcIntermResultsMatrix, getCalculatorDistributionInColumnDataArray, getDataColumns, getDataColumnsLength, getDataRowCount, getGroupColumns, getGroupColumnsCount, getGroupingLevel, getPreviousRowOfGroupValues, getShowGrandTotal, getShowTotals, getTotalStringForGroupingLevel, getTotalStringForGroupingLevelAndPredecessors, getTotalStringForGroupingLevelAndPredecessors

Methods inherited from class java.lang.Object

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

Constructor Detail

ExternalSortPreparationStep

public ExternalSortPreparationStep()

ExternalSortPreparationStep

public ExternalSortPreparationStep(int maxRowsInMemory)

Parameters:

maxRowsInMemory -

Method Detail

init

public StepResult<List<File>> init(StepInput stepInput)

Description copied from interface: AlgorithmMainStep

this method is called only once for a report and represents the construction step where you can define the keys and values used inside the execute method. Warning: this is the only place where you can add keys to the report context

Parameters:

stepInput - TODO

Returns:

TODO

execute

public StepResult<String> execute(NewRowEvent newRow,
                                  StepInput stepInput)

Description copied from interface: AlgorithmMainStep

callback method called for each row

stepInput - TODO

Returns:

TODO

exit

public StepResult<String> exit(StepInput stepInput)

Description copied from interface: AlgorithmMainStep

called when finishing the algorithm execution

saveToFile

public File saveToFile(List<NewRowEvent> rowsList)
                throws IOException

saves the given list into a temporary file

Parameters:

rowsList - list of input rows

Returns:

a file containing the input rows

Throws:

IOException - when serialization IOException occurs