weka.classifiers.lazy.kstar
Class KStarCache

java.lang.Object
  weka.classifiers.lazy.kstar.KStarCache

All Implemented Interfaces:

java.io.Serializable

public class KStarCache

extends java.lang.Object

implements java.io.Serializable

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

Version:

$Revision 1.0 $

Author:

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

See Also:

Serialized Form

Nested Class Summary

class	KStarCache.CacheTable A custom hashtable class to support the caching system.
class	KStarCache.TableEntry Hashtable collision list.

Field Summary

(package private) KStarCache.CacheTable

m_Cache cache table

Constructor Summary

KStarCache()

Method Summary

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
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

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

Field Detail

m_Cache

KStarCache.CacheTable m_Cache

cache table

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.