de.lmu.ifi.dbs.elki.datasource.filter.transform

Class ProjectionFilter<I,O>

java.lang.Object

de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamFilter

de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamConversionFilter<I,O>

de.lmu.ifi.dbs.elki.datasource.filter.transform.ProjectionFilter<I,O>

Type Parameters:

I - Input type

O - Output type

All Implemented Interfaces:

BundleStreamSource, ObjectFilter, StreamFilter

public class ProjectionFilter<I,O>
extends AbstractStreamConversionFilter<I,O>

Apply a projection to the data.

Since:

0.6.0

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ProjectionFilter.Parameterizer<I,O> Parameterization class.

Nested classes/interfaces inherited from interface de.lmu.ifi.dbs.elki.datasource.bundle.BundleStreamSource

BundleStreamSource.Event

Field Summary

Fields

Modifier and Type	Field and Description
(package private) Projection<I,O>	projection Projection to apply.

Fields inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamFilter

source

Constructor Summary

Constructors

Constructor and Description
ProjectionFilter(Projection<I,O> projection) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected SimpleTypeInformation<? super O>	convertedType(SimpleTypeInformation<I> in) Get the output type from the input type after conversion.
protected O	filterSingleObject(I obj) Normalize a single instance.
protected TypeInformation	getInputTypeRestriction() Get the input type restriction used for negotiating the data query.

Methods inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamConversionFilter

data, getMeta, nextEvent

Methods inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamFilter

asMultipleObjectsBundle, assignDBID, filter, hasDBIDs, init

Methods inherited from class java.lang.Object

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

Field Detail

projection

Projection<I,O> projection

Projection to apply.

Constructor Detail

ProjectionFilter

public ProjectionFilter(Projection<I,O> projection)

Constructor.

Parameters:

projection - Projection

Method Detail

filterSingleObject

protected O filterSingleObject(I obj)

Description copied from class: AbstractStreamConversionFilter

Normalize a single instance. You can implement this as UnsupportedOperationException if you override both public "normalize" functions!

Specified by:

filterSingleObject in class AbstractStreamConversionFilter<I,O>

Parameters:

obj - Database object to normalize

Returns:

Normalized database object

getInputTypeRestriction

protected TypeInformation getInputTypeRestriction()

Description copied from class: AbstractStreamConversionFilter

Get the input type restriction used for negotiating the data query.

Specified by:

getInputTypeRestriction in class AbstractStreamConversionFilter<I,O>

Returns:

Type restriction

convertedType

protected SimpleTypeInformation<? super O> convertedType(SimpleTypeInformation<I> in)

Description copied from class: AbstractStreamConversionFilter

Get the output type from the input type after conversion.

Specified by:

convertedType in class AbstractStreamConversionFilter<I,O>

Parameters:

in - input type restriction

Returns:

output type restriction