org.knime.base.node.preproc.pmml.missingval.handlers

Class FixedLongValueMissingCellHandler

java.lang.Object

org.knime.base.node.preproc.pmml.missingval.MissingCellHandler

org.knime.base.node.preproc.pmml.missingval.DefaultMissingCellHandler

org.knime.base.node.preproc.pmml.missingval.handlers.FixedLongValueMissingCellHandler

public class FixedLongValueMissingCellHandler
extends DefaultMissingCellHandler

Replaces missing values with a fixed integer.

Author:

Alexander Fillbrunn

Field Summary

Fields inherited from class org.knime.base.node.preproc.pmml.missingval.MissingCellHandler

CUSTOM_HANDLER_EXTENSION_NAME

Constructor Summary

Constructors

Constructor and Description
FixedLongValueMissingCellHandler(DataColumnSpec col)

Method Summary

Modifier and Type	Method and Description
static SettingsModelLong	createLongValueSettingsModel()
DataCell	getCell(RowKey key, DataColumnWindow window) Calculates the replacement value for a cell.
org.dmg.pmml.DerivedFieldDocument.DerivedField	getPMMLDerivedField() Creates a derived field for the documentation of the operation in PMML.
Statistic	getStatistic() Returns a Knime statistic to be evaluated before missing values are replaced.
void	loadSettingsFrom(NodeSettingsRO settings) Loads user settings.
void	saveSettingsTo(NodeSettingsWO settings) Saves user settings.

Methods inherited from class org.knime.base.node.preproc.pmml.missingval.DefaultMissingCellHandler

getNextCellsWindowSize, getPreviousCellsWindowSize

Methods inherited from class org.knime.base.node.preproc.pmml.missingval.MissingCellHandler

createExtensionDerivedField, createValueReplacingDerivedField, fromPMMLExtension, getColumnSpec, getOutputDataType, getPMMLDataTypeForColumn, getWarningMessage, nonMissingValueSeen, rowRemoved

Methods inherited from class java.lang.Object

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

Constructor Detail

FixedLongValueMissingCellHandler

public FixedLongValueMissingCellHandler(DataColumnSpec col)

Parameters:

col - the column this handler is configured for

Method Detail

createLongValueSettingsModel

public static SettingsModelLong createLongValueSettingsModel()

Returns:

a new SettingsModel for the fixed integer value the user can select

loadSettingsFrom

public void loadSettingsFrom(NodeSettingsRO settings)
                      throws InvalidSettingsException

Loads user settings.

Specified by:

loadSettingsFrom in class MissingCellHandler

Parameters:

settings - the settings

Throws:

InvalidSettingsException - when the settings cannot be loaded

saveSettingsTo

public void saveSettingsTo(NodeSettingsWO settings)

Saves user settings.

Specified by:

saveSettingsTo in class MissingCellHandler

Parameters:

settings - the settings

getStatistic

public Statistic getStatistic()

Returns a Knime statistic to be evaluated before missing values are replaced. Can return null to indicate that no statistics are needed.

Specified by:

getStatistic in class MissingCellHandler

Returns:

a Knime statistic object

getCell

public DataCell getCell(RowKey key,
                        DataColumnWindow window)

Calculates the replacement value for a cell. If the returned value is null, the row this cell in is removed from the output table.

Specified by:

getCell in class MissingCellHandler

Parameters:

key - the row key of the row where the cell should be replaced.

window - the window over the previous and next cells as defined by getPreviousCellsWindowSize and getNextCellsWindowSize.

Returns:

a data cell with the replacement value or null if the row should be removed completely

getPMMLDerivedField

public org.dmg.pmml.DerivedFieldDocument.DerivedField getPMMLDerivedField()

Creates a derived field for the documentation of the operation in PMML.

Specified by:

getPMMLDerivedField in class MissingCellHandler

Returns:

the derived field