de.lmu.ifi.dbs.elki.distance.distancefunction

Class AbstractDatabaseDistanceFunction<O>

java.lang.Object

de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractDatabaseDistanceFunction<O>

Type Parameters:

O - the type of DatabaseObject to compute the distances in between

All Implemented Interfaces:

DistanceFunction<O>

Direct Known Subclasses:

AbstractDBIDRangeDistanceFunction, AbstractIndexBasedDistanceFunction, AbstractSimilarityAdapter, RandomStableDistanceFunction

public abstract class AbstractDatabaseDistanceFunction<O>
extends Object
implements DistanceFunction<O>

Abstract super class for distance functions needing a database context.

Author:

Elke Achtert

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AbstractDatabaseDistanceFunction.Instance<O> The actual instance bound to a particular database.

Constructor Summary

Constructors

Constructor and Description
AbstractDatabaseDistanceFunction() Constructor.

Method Summary

Modifier and Type	Method and Description
boolean	isMetric() Is this distance function metric (in particular, does it satisfy the triangle equation?)
boolean	isSymmetric() Is this function symmetric?

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.distancefunction.DistanceFunction

getInputTypeRestriction, instantiate

Constructor Detail

AbstractDatabaseDistanceFunction

public AbstractDatabaseDistanceFunction()

Constructor.

Method Detail

isMetric

public boolean isMetric()

Description copied from interface: DistanceFunction

Is this distance function metric (in particular, does it satisfy the triangle equation?)

Specified by:

isMetric in interface DistanceFunction<O>

Returns:

true when metric.

isSymmetric

public boolean isSymmetric()

Description copied from interface: DistanceFunction

Is this function symmetric?

Specified by:

isSymmetric in interface DistanceFunction<O>

Returns:

true when symmetric