de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.mktrees.mkcop

Class MkCoPTreeNode<O>

java.lang.Object

de.lmu.ifi.dbs.elki.persistent.AbstractExternalizablePage

de.lmu.ifi.dbs.elki.index.tree.AbstractNode<E>

de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.AbstractMTreeNode<O,MkCoPTreeNode<O>,MkCoPEntry>

de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.mktrees.mkcop.MkCoPTreeNode<O>

Type Parameters:

O - object type

All Implemented Interfaces:

Node<MkCoPEntry>, ExternalizablePage, Page, Externalizable, Serializable

 class MkCoPTreeNode<O>
extends AbstractMTreeNode<O,MkCoPTreeNode<O>,MkCoPEntry>

Represents a node in an MkCop-Tree.

Since:

0.2

Author:

Elke Achtert

Field Summary

Fields

Modifier and Type	Field and Description
private static long	serialVersionUID Serial version UID

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

entries, isLeaf, numEntries

Constructor Summary

Constructors

Constructor and Description
MkCoPTreeNode() Empty constructor for Externalizable interface.
MkCoPTreeNode(int capacity, boolean isLeaf) Creates a MkCoPTreeNode object.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	adjustEntry(MkCoPEntry entry, DBID routingObjectID, double parentDistance, AbstractMTree<O,MkCoPTreeNode<O>,MkCoPEntry,?> mTree) Adjusts the parameters of the entry representing this node (e.g. after insertion of new objects).
protected ApproximationLine	conservativeKnnDistanceApproximation(int k_max) Determines and returns the conservative approximation for the knn distances of this node as the maximum of the conservative approximations of all entries.
protected void	integrityCheckParameters(MkCoPEntry parentEntry, MkCoPTreeNode<O> parent, int index, AbstractMTree<O,MkCoPTreeNode<O>,MkCoPEntry,?> mTree) Tests, if the parameters of the entry representing this node, are correctly set.
protected ApproximationLine	progressiveKnnDistanceApproximation(int k_max) Determines and returns the progressive approximation for the knn distances of this node as the maximum of the progressive approximations of all entries.

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

coveringRadiusFromEntries, integrityCheck

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

addDirectoryEntry, addLeafEntry, children, deleteAllEntries, deleteEntry, equals, getCapacity, getEntries, getEntry, getNumEntries, isLeaf, readExternal, removeMask, splitByMask, splitTo, splitTo, toString, writeExternal

Methods inherited from class de.lmu.ifi.dbs.elki.persistent.AbstractExternalizablePage

getPageID, hashCode, isDirty, setDirty, setPageID

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface de.lmu.ifi.dbs.elki.persistent.Page

getPageID, isDirty, setDirty, setPageID

Field Detail

serialVersionUID

private static final long serialVersionUID

Serial version UID

See Also:

Constant Field Values

Constructor Detail

MkCoPTreeNode

public MkCoPTreeNode()

Empty constructor for Externalizable interface.

MkCoPTreeNode

public MkCoPTreeNode(int capacity,
             boolean isLeaf)

Creates a MkCoPTreeNode object.

Parameters:

capacity - the capacity (maximum number of entries plus 1 for overflow) of this node

isLeaf - indicates whether this node is a leaf node

Method Detail

conservativeKnnDistanceApproximation

protected ApproximationLine conservativeKnnDistanceApproximation(int k_max)

Determines and returns the conservative approximation for the knn distances of this node as the maximum of the conservative approximations of all entries.

Parameters:

k_max - the maximum k parameter

Returns:

the conservative approximation for the knn distances

progressiveKnnDistanceApproximation

protected ApproximationLine progressiveKnnDistanceApproximation(int k_max)

Determines and returns the progressive approximation for the knn distances of this node as the maximum of the progressive approximations of all entries.

Parameters:

k_max - the maximum k parameter

Returns:

the conservative approximation for the knn distances

adjustEntry

public boolean adjustEntry(MkCoPEntry entry,
                  DBID routingObjectID,
                  double parentDistance,
                  AbstractMTree<O,MkCoPTreeNode<O>,MkCoPEntry,?> mTree)

Description copied from class: AbstractMTreeNode

Adjusts the parameters of the entry representing this node (e.g. after insertion of new objects). Subclasses may need to overwrite this method.

Overrides:

adjustEntry in class AbstractMTreeNode<O,MkCoPTreeNode<O>,MkCoPEntry>

Parameters:

entry - the entry representing this node

routingObjectID - the id of the (new) routing object of this node

parentDistance - the distance from the routing object of this node to the routing object of the parent node

mTree - the M-Tree object holding this node

Returns:

true if adjustment of parent is needed

integrityCheckParameters

protected void integrityCheckParameters(MkCoPEntry parentEntry,
                            MkCoPTreeNode<O> parent,
                            int index,
                            AbstractMTree<O,MkCoPTreeNode<O>,MkCoPEntry,?> mTree)

Description copied from class: AbstractMTreeNode

Tests, if the parameters of the entry representing this node, are correctly set. Subclasses may need to overwrite this method.

Overrides:

integrityCheckParameters in class AbstractMTreeNode<O,MkCoPTreeNode<O>,MkCoPEntry>

Parameters:

parentEntry - the entry representing the parent

parent - the parent holding the entry representing this node

index - the index of the entry in the parents child arry

mTree - the M-Tree holding this node