org.knime.base.data.aggregation.date
Class MillisRangeOperator

java.lang.Object
  org.knime.base.data.aggregation.AggregationOperator
      org.knime.base.data.aggregation.date.MillisRangeOperator

All Implemented Interfaces:

Comparable<AggregationMethod>, AggregationMethod

Direct Known Subclasses:

DayRangeOperator

public class MillisRangeOperator
extends AggregationOperator

Date operator that computes the range between the first and last date in milliseconds.

Author:

Tobias Koetter, University of Konstanz

Constructor Summary

	MillisRangeOperator(GlobalSettings globalSettings, OperatorColumnSettings opColSettings) Constructor for class MillisRangeOperator.
protected	MillisRangeOperator(OperatorData operatorData, GlobalSettings globalSettings, OperatorColumnSettings opColSettings) Constructor for class MillisRangeOperator.

Method Summary

protected boolean	computeInternal(DataCell cell)
AggregationOperator	createInstance(GlobalSettings globalSettings, OperatorColumnSettings opColSettings) Creates a new instance of this operator.
protected DataType	getDataType(DataType origType)
String	getDescription()
protected DateAndTimeValue	getMax()
protected DateAndTimeValue	getMin()
protected DataCell	getResultInternal()
protected void	resetInternal() Should reset the operator to the start values.

Methods inherited from class org.knime.base.data.aggregation.AggregationOperator

compareTo, compute, createColumnSpec, createOperator, getColumnLabel, getGlobalSettings, getId, getLabel, getMaxUniqueValues, getOperatorData, getResult, getSkipMessage, getSupportedType, getSupportedTypeLabel, getValueDelimiter, inclMissingCells, isCompatible, isCompatible, isSkipped, isUsesLimit, keepColumnSpec, reset, setSkipMessage, setSkipped, supportsMissingValueOption, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

MillisRangeOperator

protected MillisRangeOperator(OperatorData operatorData,
                              GlobalSettings globalSettings,
                              OperatorColumnSettings opColSettings)

Constructor for class MillisRangeOperator.

Parameters:

operatorData - the operator data

globalSettings - the global settings

opColSettings - the operator column specific settings

MillisRangeOperator

public MillisRangeOperator(GlobalSettings globalSettings,
                           OperatorColumnSettings opColSettings)

Constructor for class MillisRangeOperator.

Parameters:

globalSettings - the global settings

opColSettings - the operator column specific settings

Method Detail

createInstance

public AggregationOperator createInstance(GlobalSettings globalSettings,
                                          OperatorColumnSettings opColSettings)

Creates a new instance of this operator. A new instance is created for each column.

Specified by:

createInstance in class AggregationOperator

Parameters:

globalSettings - the global settings

opColSettings - the operator column specific settings

Returns:

a new instance of this operator

computeInternal

protected boolean computeInternal(DataCell cell)

Specified by:

computeInternal in class AggregationOperator

Parameters:

cell - the DataCell to consider during computing the cell can't be null but can be a missing cell DataCell.isMissing() if the option is AggregationOperator.inclMissingCells() option is set to true.

Returns:

true if this column should be skipped in further calculations

getDataType

protected DataType getDataType(DataType origType)

Specified by:

getDataType in class AggregationOperator

Parameters:

origType - the DataType of the original column to aggregate

Returns:

the DataType of the aggregation result

getResultInternal

protected DataCell getResultInternal()

Specified by:

getResultInternal in class AggregationOperator

Returns:

the result DataCell

resetInternal

protected void resetInternal()

Should reset the operator to the start values.

Specified by:

resetInternal in class AggregationOperator

getMin

protected DateAndTimeValue getMin()

Returns:

the most distant date or null if the group contained only missing cells

getMax

protected DateAndTimeValue getMax()

Returns:

the most resent date or null if the group contained only missing cells

getDescription

public String getDescription()

Returns:

a description that explains the used aggregation method to the user