org.apache.mahout.vectorizer.encoders

Class CachingStaticWordValueEncoder

java.lang.Object

org.apache.mahout.vectorizer.encoders.FeatureVectorEncoder

org.apache.mahout.vectorizer.encoders.WordValueEncoder

org.apache.mahout.vectorizer.encoders.StaticWordValueEncoder

org.apache.mahout.vectorizer.encoders.CachingStaticWordValueEncoder

public class CachingStaticWordValueEncoder
extends StaticWordValueEncoder

Field Summary

Fields inherited from class org.apache.mahout.vectorizer.encoders.FeatureVectorEncoder

CONTINUOUS_VALUE_HASH_SEED, WORD_LIKE_VALUE_HASH_SEED

Constructor Summary

Constructors

Constructor and Description
CachingStaticWordValueEncoder(String name, int dataSize)

Method Summary

Modifier and Type	Method and Description
protected int	hashForProbe(byte[] originalForm, int dataSize, String name, int probe) Provides the unique hash for a particular probe.
void	setProbes(int probes) Sets the number of locations in the feature vector that a value should be in.

Methods inherited from class org.apache.mahout.vectorizer.encoders.StaticWordValueEncoder

setDictionary, setMissingValueWeight, weight

Methods inherited from class org.apache.mahout.vectorizer.encoders.WordValueEncoder

addToVector, asString, getWeight

Methods inherited from class org.apache.mahout.vectorizer.encoders.FeatureVectorEncoder

addToVector, addToVector, addToVector, bytesForString, getName, getProbes, hash, hash, hash, hash, hash, hashesForProbe, isTraceEnabled, setTraceDictionary, trace, trace

Methods inherited from class java.lang.Object

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

Constructor Detail

CachingStaticWordValueEncoder

public CachingStaticWordValueEncoder(String name,
                                     int dataSize)

Method Detail

setProbes

public void setProbes(int probes)

Description copied from class: FeatureVectorEncoder

Sets the number of locations in the feature vector that a value should be in.

Overrides:

setProbes in class FeatureVectorEncoder

Parameters:

probes - Number of locations to increment.

hashForProbe

protected int hashForProbe(byte[] originalForm,
                           int dataSize,
                           String name,
                           int probe)

Description copied from class: FeatureVectorEncoder

Provides the unique hash for a particular probe. For all encoders except text, this is all that is needed and the default implementation of hashesForProbe will do the right thing. For text and similar values, hashesForProbe should be over-ridden and this method should not be used.

Overrides:

hashForProbe in class StaticWordValueEncoder

Parameters:

originalForm - The original byte array value

dataSize - The length of the vector being encoded

name - The name of the variable being encoded

probe - The probe number

Returns:

The hash of the current probe