Package com.namsor.oss.classify.bayes

Class AbstractNaiveBayesClassifierMapImpl

java.lang.Object

com.namsor.oss.classify.bayes.AbstractNaiveBayesImpl

com.namsor.oss.classify.bayes.AbstractNaiveBayesClassifierImpl

com.namsor.oss.classify.bayes.AbstractNaiveBayesClassifierMapImpl

All Implemented Interfaces:

INaiveBayesClassifier

Direct Known Subclasses:

NaiveBayesClassifierMapImpl, NaiveBayesClassifierMapLaplacedImpl

public abstract class AbstractNaiveBayesClassifierMapImpl
extends AbstractNaiveBayesClassifierImpl

A simple, scalable Naive Bayes Classifier, based on a key-value store (in memory using ConcurrentHashMap, or disk-based using org.mapdb.HTreeMap)

Author:

elian

Field Summary

Fields inherited from class com.namsor.oss.classify.bayes.AbstractNaiveBayesClassifierImpl

orderByProba

Constructor Summary

Constructors

Constructor	Description
AbstractNaiveBayesClassifierMapImpl(String classifierName, String[] categories)	Create in-memory classifier using ConcurrentHashMap
AbstractNaiveBayesClassifierMapImpl(String classifierName, String[] categories, String rootPathWritable)	Create persistent classifier using org.mapdb.HTreeMap

Method Summary

Modifier and Type	Method	Description
void	dbClose()	Close the classifier (if persistent)
void	dbCloseAndDestroy()	Close the classifier (if persistent) and destroy the database.
long	dbSize()	Estimate the number of key-values in DB
void	dumpDb(Writer w)	Dump the current state of the model (can be large)
protected Map<String,Long>	getDb()
String	getRootPathWritable()

Methods inherited from class com.namsor.oss.classify.bayes.AbstractNaiveBayesClassifierImpl

getCategories, getClassifierName, learn, likelihoodsToProbas

Methods inherited from class com.namsor.oss.classify.bayes.AbstractNaiveBayesImpl

pathCategory, pathCategoryFeatureKey, pathCategoryFeatureKeyValue, pathFeatureKey, pathFeatureKeyCountValueTypes, pathFeatureKeyValue, pathGlobal, pathGlobalCountCategories

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.namsor.oss.classify.bayes.INaiveBayesClassifier

classify, learn

Constructor Detail

AbstractNaiveBayesClassifierMapImpl

public AbstractNaiveBayesClassifierMapImpl(String classifierName,
                                           String[] categories)

Create in-memory classifier using ConcurrentHashMap

Parameters:

classifierName - The classifier name

categories - The classification categories

AbstractNaiveBayesClassifierMapImpl

public AbstractNaiveBayesClassifierMapImpl(String classifierName,
                                           String[] categories,
                                           String rootPathWritable)

Create persistent classifier using org.mapdb.HTreeMap

Parameters:

classifierName - The classifier name

categories - The classification categories

rootPathWritable - A writable directory for org.mapdb.HTreeMap storage

Method Detail

dbClose

public void dbClose()
             throws PersistentClassifierException

Description copied from interface: INaiveBayesClassifier

Close the classifier (if persistent)

Throws:

PersistentClassifierException - The persistence error and cause

dbCloseAndDestroy

public void dbCloseAndDestroy()
                       throws PersistentClassifierException

Description copied from interface: INaiveBayesClassifier

Close the classifier (if persistent) and destroy the database.

Throws:

PersistentClassifierException - The persistence error and cause

dbSize

public long dbSize()
            throws PersistentClassifierException

Description copied from interface: INaiveBayesClassifier

Estimate the number of key-values in DB

Returns:

The estimate number of key values

Throws:

PersistentClassifierException - The persistence error and cause

dumpDb

public void dumpDb(Writer w)
            throws PersistentClassifierException

Description copied from interface: INaiveBayesClassifier

Dump the current state of the model (can be large)

Parameters:

w - A writer

Throws:

PersistentClassifierException - The persistence error and cause

getDb

protected Map<String,Long> getDb()

Returns:

the db

getRootPathWritable

public String getRootPathWritable()

Returns:

the rootPathWritable