de.lmu.ifi.dbs.elki.database.query.distance

Class PrimitiveDistanceQuery<O>

java.lang.Object

de.lmu.ifi.dbs.elki.database.query.distance.PrimitiveDistanceQuery<O>

Type Parameters:

O - Database object type.

All Implemented Interfaces:

DatabaseQuery, DistanceQuery<O>

Direct Known Subclasses:

PrimitiveDistanceSimilarityQuery, SpatialPrimitiveDistanceQuery

public class PrimitiveDistanceQuery<O>
extends java.lang.Object
implements DistanceQuery<O>

Run a database query in a database context.

Since:

0.4.0

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
protected PrimitiveDistanceFunction<? super O>	distanceFunction The distance function we use.
protected Relation<? extends O>	relation The data to use for this query

Fields inherited from interface de.lmu.ifi.dbs.elki.database.query.DatabaseQuery

HINT_BULK, HINT_EXACT, HINT_HEAVY_USE, HINT_NO_CACHE, HINT_OPTIMIZED_ONLY, HINT_SINGLE

Constructor Summary

Constructors

Constructor and Description
PrimitiveDistanceQuery(Relation<? extends O> relation, PrimitiveDistanceFunction<? super O> distanceFunction) Constructor.

Method Summary

Modifier and Type	Method and Description
double	distance(DBIDRef id1, DBIDRef id2) Returns the distance between the two objects specified by their object ids.
double	distance(DBIDRef id1, O o2) Returns the distance between the two objects specified by their object ids.
double	distance(O o1, DBIDRef id2) Returns the distance between the two objects specified by their object ids.
double	distance(O o1, O o2) Returns the distance between the two objects specified by their object ids.
PrimitiveDistanceFunction<? super O>	getDistanceFunction() Get the inner distance function.
Relation<? extends O>	getRelation() Access the underlying data query.

Methods inherited from class java.lang.Object

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

Field Detail

relation

protected final Relation<? extends O> relation

The data to use for this query

distanceFunction

protected final PrimitiveDistanceFunction<? super O> distanceFunction

The distance function we use.

Constructor Detail

PrimitiveDistanceQuery

public PrimitiveDistanceQuery(Relation<? extends O> relation,
                              PrimitiveDistanceFunction<? super O> distanceFunction)

Constructor.

Parameters:

relation - Representation to use.

distanceFunction - Our distance function

Method Detail

distance

public final double distance(DBIDRef id1,
                             DBIDRef id2)

Description copied from interface: DistanceQuery

Returns the distance between the two objects specified by their object ids.

Specified by:

distance in interface DistanceQuery<O>

Parameters:

id1 - first object id

id2 - second object id

Returns:

the distance between the two objects specified by their object ids

distance

public final double distance(O o1,
                             DBIDRef id2)

Description copied from interface: DistanceQuery

Returns the distance between the two objects specified by their object ids.

Specified by:

distance in interface DistanceQuery<O>

Parameters:

o1 - first object

id2 - second object id

Returns:

the distance between the two objects specified by their object ids

distance

public final double distance(DBIDRef id1,
                             O o2)

Description copied from interface: DistanceQuery

Returns the distance between the two objects specified by their object ids.

Specified by:

distance in interface DistanceQuery<O>

Parameters:

id1 - first object id

o2 - second object

Returns:

the distance between the two objects specified by their object ids

distance

public double distance(O o1,
                       O o2)

Description copied from interface: DistanceQuery

Returns the distance between the two objects specified by their object ids.

Specified by:

distance in interface DistanceQuery<O>

Parameters:

o1 - first object

o2 - second object

Returns:

the distance between the two objects specified by their object ids

getRelation

public Relation<? extends O> getRelation()

Description copied from interface: DistanceQuery

Access the underlying data query.

Specified by:

getRelation in interface DistanceQuery<O>

Returns:

data query in use

getDistanceFunction

public PrimitiveDistanceFunction<? super O> getDistanceFunction()

Description copied from interface: DistanceQuery

Get the inner distance function.

Specified by:

getDistanceFunction in interface DistanceQuery<O>

Returns:

Distance function