de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.mtree

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

java.lang.Object

de.lmu.ifi.dbs.elki.index.tree.IndexTree<N,E>

de.lmu.ifi.dbs.elki.index.tree.metrical.MetricalIndexTree<O,D,N,E>

de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.AbstractMTree<O,D,MTreeNode<O,D>,MTreeEntry<D>>

de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.mtree.MTree<O,D>

de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.mtree.MTreeIndex<O,D>

Type Parameters:

O - Object type

D - Distance type

All Implemented Interfaces:

Index, KNNIndex<O>, RangeIndex<O>, Result

public class MTreeIndex<O,D extends Distance<D>>
extends MTree<O,D>
implements RangeIndex<O>, KNNIndex<O>

Class for using an m-tree as database index.

Field Summary

Fields

Modifier and Type	Field and Description
private Relation<O>	relation The relation indexed.

Fields inherited from class de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.AbstractMTree

distanceFunction, distanceQuery, EXTRA_INTEGRITY_CHECKS

Fields inherited from class de.lmu.ifi.dbs.elki.index.tree.IndexTree

dirCapacity, dirMinimum, initialized, leafCapacity, leafMinimum

Constructor Summary

Constructors

Constructor and Description
MTreeIndex(Relation<O> relation, PageFile<MTreeNode<O,D>> pagefile, DistanceQuery<O,D> distanceQuery, DistanceFunction<O,D> distanceFunction) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected MTreeEntry<D>	createNewLeafEntry(DBID id, O object, D parentDistance)
boolean	delete(DBIDRef id) Throws an UnsupportedOperationException since deletion of objects is not yet supported by an M-Tree.
void	deleteAll(DBIDs ids) Throws an UnsupportedOperationException since deletion of objects is not yet supported by an M-Tree.
<S extends Distance<S>> KNNQuery<O,S>	getKNNQuery(DistanceQuery<O,S> distanceQuery, Object... hints) Get a KNN query object for the given distance query and k.
String	getLongName() A "pretty" name for the result, for use in titles, captions and menus.
<S extends Distance<S>> RangeQuery<O,S>	getRangeQuery(DistanceQuery<O,S> distanceQuery, Object... hints) Get a range query object for the given distance query and k.
String	getShortName() A short name for the result, useful for file names.
void	insert(DBIDRef id) Inserts the specified object into this index.
void	insertAll(DBIDs ids) Inserts the specified objects into this index.

Methods inherited from class de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.mtree.MTree

createNewDirectoryEntry, createNewDirectoryNode, createNewLeafNode, createRootEntry, getLogger, initializeCapacities, preInsert

Methods inherited from class de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.AbstractMTree

createEmptyRoot, distance, getDistanceFactory, getDistanceFunction, getDistanceQuery, getHeight, getLeaves, getSortedEntries, getSortedEntries, insert, insertAll, toString

Methods inherited from class de.lmu.ifi.dbs.elki.index.tree.IndexTree

createHeader, deleteNode, getFile, getNode, getNode, getPageFileStatistics, getPageID, getPageSize, getRoot, getRootEntry, getRootID, getRootPath, initialize, initialize, initializeFromFile, isRoot, postDelete, writeNode

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.lmu.ifi.dbs.elki.index.Index

getPageFileStatistics

Field Detail

relation

private Relation<O> relation

The relation indexed.

Constructor Detail

MTreeIndex

public MTreeIndex(Relation<O> relation,
          PageFile<MTreeNode<O,D>> pagefile,
          DistanceQuery<O,D> distanceQuery,
          DistanceFunction<O,D> distanceFunction)

Constructor.

Parameters:

relation - Relation indexed

pagefile - Page file

distanceQuery - Distance query

distanceFunction - Distance function

Method Detail

createNewLeafEntry

protected MTreeEntry<D> createNewLeafEntry(DBID id,
                               O object,
                               D parentDistance)

Returns:

a new MTreeLeafEntry representing the specified data object

insert

public void insert(DBIDRef id)

Description copied from interface: Index

Inserts the specified object into this index.

Specified by:

insert in interface Index

Parameters:

id - the object to be inserted

insertAll

public void insertAll(DBIDs ids)

Description copied from interface: Index

Inserts the specified objects into this index. If a bulk load mode is implemented, the objects are inserted in one bulk.

Specified by:

insertAll in interface Index

Parameters:

ids - the objects to be inserted

delete

public final boolean delete(DBIDRef id)

Throws an UnsupportedOperationException since deletion of objects is not yet supported by an M-Tree.

Specified by:

delete in interface Index

Parameters:

id - Object to remove

Returns:

true if this index did contain the object, false otherwise

Throws:

UnsupportedOperationException - thrown, since deletions aren't implemented yet.

deleteAll

public void deleteAll(DBIDs ids)

Throws an UnsupportedOperationException since deletion of objects is not yet supported by an M-Tree.

Specified by:

deleteAll in interface Index

Parameters:

ids - Objects to remove

Throws:

UnsupportedOperationException - thrown, since deletions aren't implemented yet.

getKNNQuery

public <S extends Distance<S>> KNNQuery<O,S> getKNNQuery(DistanceQuery<O,S> distanceQuery,
                                                Object... hints)

Description copied from interface: KNNIndex

Get a KNN query object for the given distance query and k. This function MAY return null, when the given distance is not supported!

Specified by:

getKNNQuery in interface KNNIndex<O>

Type Parameters:

S - Distance type

Parameters:

distanceQuery - Distance query

hints - Hints for the optimizer

Returns:

KNN Query object or null

getRangeQuery

public <S extends Distance<S>> RangeQuery<O,S> getRangeQuery(DistanceQuery<O,S> distanceQuery,
                                                    Object... hints)

Description copied from interface: RangeIndex

Get a range query object for the given distance query and k. This function MAY return null, when the given distance is not supported!

Specified by:

getRangeQuery in interface RangeIndex<O>

Type Parameters:

S - Distance type

Parameters:

distanceQuery - Distance query

hints - Hints for the optimizer

Returns:

KNN Query object or null

getLongName

public String getLongName()

Description copied from interface: Result

A "pretty" name for the result, for use in titles, captions and menus.

Specified by:

getLongName in interface Result

Returns:

result name

getShortName

public String getShortName()

Description copied from interface: Result

A short name for the result, useful for file names.

Specified by:

getShortName in interface Result

Returns:

result name