org.knime.base.data.aggregation.general
Class UniqueCountOperator

java.lang.Object
  org.knime.base.data.aggregation.AggregationOperator
      org.knime.base.data.aggregation.general.SetCellOperator
          org.knime.base.data.aggregation.general.UniqueCountOperator

All Implemented Interfaces:

Comparable<AggregationMethod>, AggregationMethod

public class UniqueCountOperator
extends SetCellOperator

Returns the count of the unique values per group.

Author:

Tobias Koetter, University of Konstanz

Constructor Summary

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

Method Summary

AggregationOperator	createInstance(GlobalSettings globalSettings, OperatorColumnSettings opColSettings) Creates a new instance of this operator.
protected DataType	getDataType(DataType origType)
String	getDescription()
protected DataCell	getResultInternal()

Methods inherited from class org.knime.base.data.aggregation.general.SetCellOperator

computeInternal, getGroupMembers, resetInternal

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

UniqueCountOperator

public UniqueCountOperator(GlobalSettings globalSettings,
                           OperatorColumnSettings opColSettings)

Constructor for class Concatenate.

Parameters:

globalSettings - the global settings

opColSettings - the operator column specific settings

UniqueCountOperator

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

Constructor for class UniqueCountOperator.

Parameters:

operatorData - the operator data

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.

Overrides:

createInstance in class SetCellOperator

Parameters:

globalSettings - the global settings

opColSettings - the operator column specific settings

Returns:

a new instance of this operator

getDataType

protected DataType getDataType(DataType origType)

Overrides:

getDataType in class SetCellOperator

Parameters:

origType - the DataType of the original column to aggregate

Returns:

the DataType of the aggregation result

getResultInternal

protected DataCell getResultInternal()

Overrides:

getResultInternal in class SetCellOperator

Returns:

the result DataCell

getDescription

public String getDescription()

Specified by:

getDescription in interface AggregationMethod

Overrides:

getDescription in class SetCellOperator

Returns:

a description that explains the used aggregation method to the user