de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.rdknn

Class RdKNNDirectoryEntry

java.lang.Object

de.lmu.ifi.dbs.elki.index.tree.AbstractDirectoryEntry

de.lmu.ifi.dbs.elki.index.tree.spatial.SpatialDirectoryEntry

de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.rdknn.RdKNNDirectoryEntry

All Implemented Interfaces:

SpatialComparable, DirectoryEntry, Entry, RdKNNEntry, SpatialEntry, Externalizable, Serializable

public class RdKNNDirectoryEntry
extends SpatialDirectoryEntry
implements RdKNNEntry

Represents an entry in a directory node of an RdKNN-Tree. Additionally to a SpatialDirectoryEntry a RdKNNDirectoryEntry holds the knn distance of the underlying RdKNN-Tree node.

Since:

0.2

Author:

Elke Achtert

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private double	knnDistance The aggregated knn distance of this entry.
private static long	serialVersionUID

Constructor Summary

Constructors

Constructor and Description
RdKNNDirectoryEntry() Empty constructor for serialization purposes.
RdKNNDirectoryEntry(int id, ModifiableHyperBoundingBox mbr, double knnDistance) Constructs a new RDkNNDirectoryEntry object with the given parameters.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object o) Indicates whether some other object is "equal to" this one.
double	getKnnDistance() Returns the knn distance of this entry.
void	readExternal(ObjectInput in) Calls the super method and reads the knn distance of this entry from the specified input stream.
void	setKnnDistance(double knnDistance) Sets the knn distance of this entry.
void	writeExternal(ObjectOutput out) Calls the super method and writes the knn distance of this entry to the specified stream.

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

extendMBR, getDimensionality, getMax, getMin, hasMBR, setMBR

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

getEntryID, getPageID, hashCode, isLeafEntry, toString

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.Entry

isLeafEntry

Methods inherited from interface de.lmu.ifi.dbs.elki.data.spatial.SpatialComparable

getDimensionality, getMax, getMin

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

knnDistance

private double knnDistance

The aggregated knn distance of this entry.

Constructor Detail

RdKNNDirectoryEntry

public RdKNNDirectoryEntry()

Empty constructor for serialization purposes.

RdKNNDirectoryEntry

public RdKNNDirectoryEntry(int id,
                   ModifiableHyperBoundingBox mbr,
                   double knnDistance)

Constructs a new RDkNNDirectoryEntry object with the given parameters.

Parameters:

id - the unique id of the underlying node

mbr - the minimum bounding rectangle of the underlying node

knnDistance - the aggregated knn distance of this entry

Method Detail

getKnnDistance

public double getKnnDistance()

Description copied from interface: RdKNNEntry

Returns the knn distance of this entry.

Specified by:

getKnnDistance in interface RdKNNEntry

Returns:

the knn distance of this entry

setKnnDistance

public void setKnnDistance(double knnDistance)

Description copied from interface: RdKNNEntry

Sets the knn distance of this entry.

Specified by:

setKnnDistance in interface RdKNNEntry

Parameters:

knnDistance - the knn distance to be set

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Calls the super method and writes the knn distance of this entry to the specified stream.

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class SpatialDirectoryEntry

Parameters:

out - the stream to write the object to

Throws:

IOException - Includes any I/O exceptions that may occur

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Calls the super method and reads the knn distance of this entry from the specified input stream.

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class SpatialDirectoryEntry

Parameters:

in - the stream to read data from in order to restore the object

Throws:

IOException - if I/O errors occur

ClassNotFoundException - If the class for an object being restored cannot be found.

equals

public boolean equals(Object o)

Indicates whether some other object is "equal to" this one.

Overrides:

equals in class AbstractDirectoryEntry

Parameters:

o - the object to be tested

Returns:

true, if the super method returns true and o is an RDkNNDirectoryEntry and has the same knnDistance as this entry.