de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.mktrees.mkapp
Class MkAppTreeNode<O extends DatabaseObject,D extends NumberDistance<D,N>,N extends Number>

java.lang.Object
  de.lmu.ifi.dbs.elki.persistent.AbstractPage<N>
      de.lmu.ifi.dbs.elki.index.tree.AbstractNode<N,E>
          de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.AbstractMTreeNode<O,D,MkAppTreeNode<O,D,N>,MkAppEntry<D,N>>
              de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.mktrees.mkapp.MkAppTreeNode<O,D,N>

All Implemented Interfaces:

MetricalNode<MkAppTreeNode<O,D,N>,MkAppEntry<D,N>>, Node<MkAppTreeNode<O,D,N>,MkAppEntry<D,N>>, Page<MkAppTreeNode<O,D,N>>, Externalizable, Serializable

 class MkAppTreeNode<O extends DatabaseObject,D extends NumberDistance<D,N>,N extends Number>
extends AbstractMTreeNode<O,D,MkAppTreeNode<O,D,N>,MkAppEntry<D,N>>

Represents a node in an MkApp-Tree.

Author:

Elke Achtert

Field Summary

private static long

serialVersionUID

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

eclass, entries, isLeaf, numEntries

Constructor Summary

MkAppTreeNode()
Empty constructor for Externalizable interface.

MkAppTreeNode(PageFile<MkAppTreeNode<O,D,N>> file, int capacity, boolean isLeaf)
Creates a MkAppTreeNode object.

Method Summary

void	adjustEntry(MkAppEntry<D,N> entry, Integer routingObjectID, D parentDistance, AbstractMTree<O,D,MkAppTreeNode<O,D,N>,MkAppEntry<D,N>> mTree) Adjusts the parameters of the entry representing this node.
protected MkAppTreeNode<O,D,N>	createNewDirectoryNode(int capacity) Creates a new directory node with the specified capacity.
protected MkAppTreeNode<O,D,N>	createNewLeafNode(int capacity) Creates a new leaf node with the specified capacity.
protected void	integrityCheckParameters(MkAppEntry<D,N> parentEntry, MkAppTreeNode<O,D,N> parent, int index, AbstractMTree<O,D,MkAppTreeNode<O,D,N>,MkAppEntry<D,N>> 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 de.lmu.ifi.dbs.elki.index.tree.metrical.mtreevariants.AbstractMTreeNode

coveringRadius, integrityCheck, splitEntries

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

addDirectoryEntry, addLeafEntry, children, deleteAllEntries, deleteEntry, equals, getCapacity, getEntries, getEntry, getNumEntries, increaseEntries, isLeaf, readExternal, toString, writeExternal

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

getFile, getID, hashCode, isDirty, setDirty, setFile, setID

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.lmu.ifi.dbs.elki.index.tree.Node

addDirectoryEntry, addLeafEntry, children, getEntry, getNumEntries, isLeaf

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

getID, isDirty, setDirty, setFile, setID

Methods inherited from interface java.io.Externalizable

readExternal, writeExternal

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

Constructor Detail

MkAppTreeNode

public MkAppTreeNode()

Empty constructor for Externalizable interface.

MkAppTreeNode

public MkAppTreeNode(PageFile<MkAppTreeNode<O,D,N>> file,
                     int capacity,
                     boolean isLeaf)

Creates a MkAppTreeNode object.

Parameters:

file - the file storing the MCop-Tree

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

createNewLeafNode

protected MkAppTreeNode<O,D,N> createNewLeafNode(int capacity)

Creates a new leaf node with the specified capacity.

Specified by:

createNewLeafNode in class AbstractNode<MkAppTreeNode<O extends DatabaseObject,D extends NumberDistance<D,N>,N extends Number>,MkAppEntry<D extends NumberDistance<D,N>,N extends Number>>

Parameters:

capacity - the capacity of the new node

Returns:

a new leaf node

createNewDirectoryNode

protected MkAppTreeNode<O,D,N> createNewDirectoryNode(int capacity)

Creates a new directory node with the specified capacity.

Specified by:

createNewDirectoryNode in class AbstractNode<MkAppTreeNode<O extends DatabaseObject,D extends NumberDistance<D,N>,N extends Number>,MkAppEntry<D extends NumberDistance<D,N>,N extends Number>>

Parameters:

capacity - the capacity of the new node

Returns:

a new directory node

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 void adjustEntry(MkAppEntry<D,N> entry,
                        Integer routingObjectID,
                        D parentDistance,
                        AbstractMTree<O,D,MkAppTreeNode<O,D,N>,MkAppEntry<D,N>> mTree)

Adjusts the parameters of the entry representing this node.

Overrides:

adjustEntry in class AbstractMTreeNode<O extends DatabaseObject,D extends NumberDistance<D,N>,MkAppTreeNode<O extends DatabaseObject,D extends NumberDistance<D,N>,N extends Number>,MkAppEntry<D extends NumberDistance<D,N>,N extends Number>>

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

integrityCheckParameters

protected void integrityCheckParameters(MkAppEntry<D,N> parentEntry,
                                        MkAppTreeNode<O,D,N> parent,
                                        int index,
                                        AbstractMTree<O,D,MkAppTreeNode<O,D,N>,MkAppEntry<D,N>> 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 extends DatabaseObject,D extends NumberDistance<D,N>,MkAppTreeNode<O extends DatabaseObject,D extends NumberDistance<D,N>,N extends Number>,MkAppEntry<D extends NumberDistance<D,N>,N extends Number>>

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