weka.classifiers.lazy.kstar

Class KStarCache

java.lang.Object

weka.classifiers.lazy.kstar.KStarCache

All Implemented Interfaces:

java.io.Serializable, RevisionHandler

public class KStarCache
extends java.lang.Object
implements java.io.Serializable, RevisionHandler

A class representing the caching system used to keep track of each attribute value and its corresponding scale factor or stop parameter.

Version:

$Revision: 10153 $

Author:

Len Trigg (len@reeltwo.com), Abdelaziz Mahoui (am14@cs.waikato.ac.nz)

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	KStarCache.CacheTable A custom hashtable class to support the caching system.
class	KStarCache.TableEntry Hashtable collision list.

Constructor Summary

Constructors

Constructor and Description
KStarCache()

Method Summary

Modifier and Type	Method and Description
boolean	containsKey(double key) Checks if the specified key maps with an entry in the cache table
KStarCache.TableEntry	getCacheValues(double key) Returns the values in the cache mapped by the specified key
java.lang.String	getRevision() Returns the revision string.
void	store(double key, double value, double pmiss) Stores the specified values in the cahce table for easy retrieval.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

KStarCache

public KStarCache()

Method Detail

store

public void store(double key,
                  double value,
                  double pmiss)

Stores the specified values in the cahce table for easy retrieval.

Parameters:

key - attribute value used key to lookup the cache table.

value - cache parameter: attribute scale/stop parameter.

pmiss - cache parameter: transformation probability to attribute with missing value.

containsKey

public boolean containsKey(double key)

Checks if the specified key maps with an entry in the cache table

Parameters:

key - the key to map with an entry in the hashtable.

getCacheValues

public KStarCache.TableEntry getCacheValues(double key)

Returns the values in the cache mapped by the specified key

Parameters:

key - the key used to retrieve the table entry.

getRevision

public java.lang.String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Returns:

the revision