org.knime.base.data.aggregation.collection
Class OrElementCountOperator

java.lang.Object
  org.knime.base.data.aggregation.AggregationOperator
      org.knime.base.data.aggregation.collection.OrElementOperator
          org.knime.base.data.aggregation.collection.OrElementCountOperator

All Implemented Interfaces:

Comparable<AggregationMethod>, AggregationMethod

public class OrElementCountOperator
extends OrElementOperator

Collection operator that returns the number of unique member collection elements.

Author:

Tobias Koetter, University of Konstanz

Constructor Summary

OrElementCountOperator(GlobalSettings globalSettings, OperatorColumnSettings opColSettings)
Constructor for class FirstOperator.

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

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.collection.OrElementOperator

computeInternal, getValues, 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

OrElementCountOperator

public OrElementCountOperator(GlobalSettings globalSettings,
                              OperatorColumnSettings opColSettings)

Constructor for class FirstOperator.

Parameters:

globalSettings - the global settings

opColSettings - the operator column specific settings

OrElementCountOperator

public OrElementCountOperator(OperatorData operatorData,
                              GlobalSettings globalSettings,
                              OperatorColumnSettings opColSettings)

Constructor for class OrElementCountOperator.

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 OrElementOperator

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 OrElementOperator

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 OrElementOperator

Returns:

the result DataCell

getDescription

public String getDescription()

Specified by:

getDescription in interface AggregationMethod

Overrides:

getDescription in class OrElementOperator

Returns:

a description that explains the used aggregation method to the user