Package elki.index.tree.metrical.mtreevariants.mktrees.mkapp

Class MkAppTreeNode<O>

java.lang.Object

elki.persistent.AbstractExternalizablePage

elki.index.tree.AbstractNode<E>

elki.index.tree.metrical.mtreevariants.AbstractMTreeNode<O,MkAppTreeNode<O>,MkAppEntry>

elki.index.tree.metrical.mtreevariants.mktrees.mkapp.MkAppTreeNode<O>

Type Parameters:

O - object type

All Implemented Interfaces:

Node<MkAppEntry>, Page, java.io.Externalizable, java.io.Serializable

class MkAppTreeNode<O>
extends AbstractMTreeNode<O,MkAppTreeNode<O>,MkAppEntry>

Represents a node in an MkApp-Tree.

Since:

0.1

Author:

Elke Achtert

Field Summary

Fields

Modifier and Type	Field	Description
private static Logging	LOG	Class logger.
private static long	serialVersionUID

Fields inherited from class elki.index.tree.AbstractNode

entries, isLeaf, numEntries

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
boolean	adjustEntry(MkAppEntry entry, DBID routingObjectID, double parentDistance, AbstractMTree<O,MkAppTreeNode<O>,MkAppEntry,?> mTree)	Adjusts the parameters of the entry representing this node.
protected void	integrityCheckParameters(MkAppEntry parentEntry, MkAppTreeNode<O> parent, int index, AbstractMTree<O,MkAppTreeNode<O>,MkAppEntry,?> mTree)	Tests, if the parameters of the entry representing this node, are correctly set.
protected PolynomialApproximation	knnDistanceApproximation()	Determines and returns the polynomial approximation for the knn distances of this node as the maximum of the polynomial approximations of all entries.

Methods inherited from class elki.index.tree.metrical.mtreevariants.AbstractMTreeNode

coveringRadiusFromEntries, integrityCheck

Methods inherited from class elki.index.tree.AbstractNode

addEntry, children, deleteAllEntries, deleteEntry, getCapacity, getEntry, getNumEntries, isLeaf, readExternal, removeMask, splitByMask, splitTo, splitTo, toString, writeExternal

Methods inherited from class elki.persistent.AbstractExternalizablePage

equals, getPageID, hashCode, isDirty, setDirty, setPageID

Methods inherited from class java.lang.Object

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

Methods inherited from interface elki.persistent.Page

getPageID, isDirty, setDirty, setPageID

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

LOG

private static final Logging LOG

Class logger.

Constructor Detail

MkAppTreeNode

public MkAppTreeNode()

Empty constructor for Externalizable interface.

MkAppTreeNode

public MkAppTreeNode(int capacity,
                     boolean isLeaf)

Creates a MkAppTreeNode 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

knnDistanceApproximation

protected PolynomialApproximation knnDistanceApproximation()

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

Returns:

the conservative approximation for the knn distances

adjustEntry

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

Adjusts the parameters of the entry representing this node.

Overrides:

adjustEntry in class AbstractMTreeNode<O,MkAppTreeNode<O>,MkAppEntry>

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(MkAppEntry parentEntry,
                                        MkAppTreeNode<O> parent,
                                        int index,
                                        AbstractMTree<O,MkAppTreeNode<O>,MkAppEntry,?> 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,MkAppTreeNode<O>,MkAppEntry>

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