de.lmu.ifi.dbs.elki.distance.similarityfunction

Class AbstractPrimitiveSimilarityFunction<O,D extends Distance<D>>

java.lang.Object

de.lmu.ifi.dbs.elki.distance.similarityfunction.AbstractPrimitiveSimilarityFunction<O,D>

Type Parameters:

O - object type

D - distance type

All Implemented Interfaces:

PrimitiveSimilarityFunction<O,D>, SimilarityFunction<O,D>, Parameterizable

Direct Known Subclasses:

AbstractDBIDSimilarityFunction, InvertedDistanceSimilarityFunction, Kulczynski1SimilarityFunction, Kulczynski2SimilarityFunction, LinearKernelFunction

public abstract class AbstractPrimitiveSimilarityFunction<O,D extends Distance<D>>
extends Object
implements PrimitiveSimilarityFunction<O,D>

Base implementation of a similarity function.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractPrimitiveSimilarityFunction() Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
abstract SimpleTypeInformation<? super O>	getInputTypeRestriction() Get the input data type of the function.
<T extends O> SimilarityQuery<T,D>	instantiate(Relation<T> relation) Instantiate with a representation to get the actual similarity query.
boolean	isSymmetric() Is this function symmetric?
abstract D	similarity(O o1, O o2) Computes the similarity between two given DatabaseObjects according to this similarity function.

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.lmu.ifi.dbs.elki.distance.similarityfunction.SimilarityFunction

getDistanceFactory

Constructor Detail

AbstractPrimitiveSimilarityFunction

protected AbstractPrimitiveSimilarityFunction()

Constructor.

Method Detail

isSymmetric

public boolean isSymmetric()

Description copied from interface: SimilarityFunction

Is this function symmetric?

Specified by:

isSymmetric in interface SimilarityFunction<O,D extends Distance<D>>

Returns:

true when symmetric

getInputTypeRestriction

public abstract SimpleTypeInformation<? super O> getInputTypeRestriction()

Description copied from interface: SimilarityFunction

Get the input data type of the function.

Specified by:

getInputTypeRestriction in interface PrimitiveSimilarityFunction<O,D extends Distance<D>>

Specified by:

getInputTypeRestriction in interface SimilarityFunction<O,D extends Distance<D>>

similarity

public abstract D similarity(O o1,
           O o2)

Description copied from interface: PrimitiveSimilarityFunction

Computes the similarity between two given DatabaseObjects according to this similarity function.

Specified by:

similarity in interface PrimitiveSimilarityFunction<O,D extends Distance<D>>

Parameters:

o1 - first DatabaseObject

o2 - second DatabaseObject

Returns:

the similarity between two given DatabaseObjects according to this similarity function

instantiate

public <T extends O> SimilarityQuery<T,D> instantiate(Relation<T> relation)

Description copied from interface: SimilarityFunction

Instantiate with a representation to get the actual similarity query.

Specified by:

instantiate in interface SimilarityFunction<O,D extends Distance<D>>

Parameters:

relation - Representation to use

Returns:

Actual distance query.