Class MkAppDirectoryEntry
- java.lang.Object
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- elki.index.tree.metrical.mtreevariants.MTreeDirectoryEntry
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- elki.index.tree.metrical.mtreevariants.mktrees.mkapp.MkAppDirectoryEntry
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- All Implemented Interfaces:
DirectoryEntry
,MkAppEntry
,MTreeEntry
,java.io.Externalizable
,java.io.Serializable
class MkAppDirectoryEntry extends MTreeDirectoryEntry implements MkAppEntry
Represents an entry in a directory node of a MkApp-Tree. Additionally to an MTreeDirectoryEntry an MkAppDirectoryEntry holds the polynomial approximation of its knn-distances.- Since:
- 0.1
- Author:
- Elke Achtert
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Field Summary
Fields Modifier and Type Field Description private PolynomialApproximation
approximation
The polynomial approximation.private static long
serialVersionUID
Serial version UID
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Constructor Summary
Constructors Constructor Description MkAppDirectoryEntry()
Empty constructor for serialization purposes.MkAppDirectoryEntry(DBID objectID, double parentDistance, int nodeID, double coveringRadius, PolynomialApproximation approximation)
Constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description double
approximatedValueAt(int k)
Returns the approximated value at the specified k.PolynomialApproximation
getKnnDistanceApproximation()
Returns the polynomial approximation.void
readExternal(java.io.ObjectInput in)
Calls the super method and reads the the polynomial approximation of the knn distances of this entry from the specified input stream.void
setKnnDistanceApproximation(PolynomialApproximation approximation)
Sets the polynomial approximation.void
writeExternal(java.io.ObjectOutput out)
Calls the super method and writes the polynomial approximation of the knn distances of this entry to the specified stream.-
Methods inherited from class elki.index.tree.metrical.mtreevariants.MTreeDirectoryEntry
equals, getCoveringRadius, getPageID, getParentDistance, getRoutingObjectID, hashCode, setCoveringRadius, setParentDistance, setRoutingObjectID, toString
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Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface elki.index.tree.metrical.mtreevariants.MTreeEntry
getCoveringRadius, getParentDistance, getRoutingObjectID, setCoveringRadius, setParentDistance, setRoutingObjectID
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Field Detail
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serialVersionUID
private static final long serialVersionUID
Serial version UID- See Also:
- Constant Field Values
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approximation
private PolynomialApproximation approximation
The polynomial approximation.
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Constructor Detail
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MkAppDirectoryEntry
public MkAppDirectoryEntry()
Empty constructor for serialization purposes.
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MkAppDirectoryEntry
public MkAppDirectoryEntry(DBID objectID, double parentDistance, int nodeID, double coveringRadius, PolynomialApproximation approximation)
Constructor.- Parameters:
objectID
- the id of the routing objectparentDistance
- the distance from the object to its parentnodeID
- the id of the underlying nodecoveringRadius
- the covering radius of the entryapproximation
- the polynomial approximation of the knn distances
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Method Detail
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approximatedValueAt
public double approximatedValueAt(int k)
Returns the approximated value at the specified k.- Specified by:
approximatedValueAt
in interfaceMkAppEntry
- Parameters:
k
- the parameter k of the knn distance- Returns:
- the approximated value at the specified k
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getKnnDistanceApproximation
public PolynomialApproximation getKnnDistanceApproximation()
Returns the polynomial approximation.- Specified by:
getKnnDistanceApproximation
in interfaceMkAppEntry
- Returns:
- the polynomial approximation
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setKnnDistanceApproximation
public void setKnnDistanceApproximation(PolynomialApproximation approximation)
Sets the polynomial approximation.- Specified by:
setKnnDistanceApproximation
in interfaceMkAppEntry
- Parameters:
approximation
- the polynomial approximation to be set
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writeExternal
public void writeExternal(java.io.ObjectOutput out) throws java.io.IOException
Calls the super method and writes the polynomial approximation of the knn distances of this entry to the specified stream.- Specified by:
writeExternal
in interfacejava.io.Externalizable
- Overrides:
writeExternal
in classMTreeDirectoryEntry
- Parameters:
out
- the stream to write the object to- Throws:
java.io.IOException
- Includes any I/O exceptions that may occur
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readExternal
public void readExternal(java.io.ObjectInput in) throws java.io.IOException, java.lang.ClassNotFoundException
Calls the super method and reads the the polynomial approximation of the knn distances of this entry from the specified input stream.- Specified by:
readExternal
in interfacejava.io.Externalizable
- Overrides:
readExternal
in classMTreeDirectoryEntry
- Parameters:
in
- the stream to read data from in order to restore the object- Throws:
java.io.IOException
- if I/O errors occurjava.lang.ClassNotFoundException
- If the class for an object being restored cannot be found.
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