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

Class DBIDDistanceQuery

java.lang.Object

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

de.lmu.ifi.dbs.elki.database.query.distance.AbstractDatabaseDistanceQuery<DBID>

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

All Implemented Interfaces:

DatabaseQuery, DistanceQuery<DBID>

Direct Known Subclasses:

DBIDRangeDistanceQuery

public class DBIDDistanceQuery
extends AbstractDatabaseDistanceQuery<DBID>

Run a distance query based on DBIDs

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
protected DBIDDistanceFunction	distanceFunction The distance function we use.

Fields inherited from class de.lmu.ifi.dbs.elki.database.query.distance.AbstractDistanceQuery

relation

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
DBIDDistanceQuery(Relation<DBID> relation, DBIDDistanceFunction distanceFunction) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
double	distance(DBIDRef id1, DBIDRef id2) Returns the distance between the two objects specified by their object ids.
DBIDDistanceFunction	getDistanceFunction() Get the inner distance function.

Methods inherited from class de.lmu.ifi.dbs.elki.database.query.distance.AbstractDatabaseDistanceQuery

distance, distance, distance

Methods inherited from class de.lmu.ifi.dbs.elki.database.query.distance.AbstractDistanceQuery

getRelation

Methods inherited from class java.lang.Object

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

Field Detail

distanceFunction

protected final DBIDDistanceFunction distanceFunction

The distance function we use.

Constructor Detail

DBIDDistanceQuery

public DBIDDistanceQuery(Relation<DBID> relation,
                 DBIDDistanceFunction distanceFunction)

Constructor.

Parameters:

relation - Database to use.

distanceFunction - Our distance function

Method Detail

distance

public double distance(DBIDRef id1,
              DBIDRef id2)

Description copied from class: AbstractDistanceQuery

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

Specified by:

distance in interface DistanceQuery<DBID>

Specified by:

distance in class AbstractDistanceQuery<DBID>

Parameters:

id1 - first object id

id2 - second object id

Returns:

the distance between the two objects specified by their object ids

getDistanceFunction

public DBIDDistanceFunction getDistanceFunction()

Description copied from interface: DistanceQuery

Get the inner distance function.

Returns:

Distance function