Package com.namsor.oss.classify.bayes

Class AbstractNaiveBayesClassifierLevelDBImpl

java.lang.Object

com.namsor.oss.classify.bayes.AbstractNaiveBayesImpl

com.namsor.oss.classify.bayes.AbstractNaiveBayesClassifierImpl

com.namsor.oss.classify.bayes.AbstractNaiveBayesClassifierLevelDBImpl

All Implemented Interfaces:

INaiveBayesClassifier

Direct Known Subclasses:

NaiveBayesClassifierLevelDBImpl, NaiveBayesClassifierLevelDBLaplacedImpl

public abstract class AbstractNaiveBayesClassifierLevelDBImpl
extends AbstractNaiveBayesClassifierImpl

A persistent Naive Bayes Classifier, based on LevelDB key-value store. Persistence methods : you can switch between using - the JNI Level DB implementation (import static org.fusesource.leveldbjni.JniDBFactory.*;) or - the pure Java port (import static org.iq80.leveldb.impl.Iq80DBFactory.*;)

Author:

elian

Field Summary

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

orderByProba

Constructor Summary

Constructors

Constructor	Description
AbstractNaiveBayesClassifierLevelDBImpl(String classifierName, String[] categories, int cacheSizeMb, String rootPathWritable)	Create a persistent Naive Bayes Classifier using LevelDB
AbstractNaiveBayesClassifierLevelDBImpl(String classifierName, String[] categories, String rootPathWritable)	Create a persistent Naive Bayes Classifier using LevelDB, with default cache size

Method Summary

Modifier and Type	Method	Description
protected byte[]	bytes(String key)
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 void	finalize()
org.iq80.leveldb.DB	getDb()

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

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

classify, learn

Constructor Detail

AbstractNaiveBayesClassifierLevelDBImpl

public AbstractNaiveBayesClassifierLevelDBImpl(String classifierName,
                                               String[] categories,
                                               int cacheSizeMb,
                                               String rootPathWritable)
                                        throws PersistentClassifierException

Create a persistent Naive Bayes Classifier using LevelDB

Parameters:

classifierName - The classifier name

categories - The immutable classification categories

cacheSizeMb - LevelDB cache size (ex 100mb)

rootPathWritable - The writable directory for LevelDB storage

Throws:

PersistentClassifierException - The persistence error and cause

AbstractNaiveBayesClassifierLevelDBImpl

public AbstractNaiveBayesClassifierLevelDBImpl(String classifierName,
                                               String[] categories,
                                               String rootPathWritable)
                                        throws PersistentClassifierException

Create a persistent Naive Bayes Classifier using LevelDB, with default cache size

Parameters:

classifierName - The classifier name

categories - The immutable classification categories

rootPathWritable - The writable directory for LevelDB storage

Throws:

PersistentClassifierException - The persistence error and cause

Method Detail

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

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

finalize

protected void finalize()
                 throws Throwable

Overrides:

finalize in class Object

Throws:

Throwable

bytes

protected byte[] bytes(String key)

getDb

public org.iq80.leveldb.DB getDb()

Returns:

the db

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