opennlp.tools.util.featuregen

Class CachedFeatureGenerator

java.lang.Object

opennlp.tools.util.featuregen.CachedFeatureGenerator

All Implemented Interfaces:

AdaptiveFeatureGenerator

public class CachedFeatureGenerator
extends java.lang.Object
implements AdaptiveFeatureGenerator

Caches features of the aggregated AdaptiveFeatureGenerators.

Constructor Summary

Constructors

Constructor and Description
CachedFeatureGenerator(AdaptiveFeatureGenerator... generators)

Method Summary

Modifier and Type	Method and Description
void	clearAdaptiveData() Informs the feature generator that the context of the adaptive data (typically a document) is no longer valid.
void	createFeatures(java.util.List<java.lang.String> features, java.lang.String[] tokens, int index, java.lang.String[] previousOutcomes) Adds the appropriate features for the token at the specified index with the specified array of previous outcomes to the specified list of features.
long	getNumberOfCacheHits() Retrieves the number of times a cache hit occurred.
long	getNumberOfCacheMisses() Retrieves the number of times a cache miss occurred.
java.lang.String	toString()
void	updateAdaptiveData(java.lang.String[] tokens, java.lang.String[] outcomes) Informs the feature generator that the specified tokens have been classified with the corresponding set of specified outcomes.

Methods inherited from class java.lang.Object

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

Constructor Detail

CachedFeatureGenerator

public CachedFeatureGenerator(AdaptiveFeatureGenerator... generators)

Method Detail

createFeatures

public void createFeatures(java.util.List<java.lang.String> features,
                           java.lang.String[] tokens,
                           int index,
                           java.lang.String[] previousOutcomes)

Description copied from interface: AdaptiveFeatureGenerator

Adds the appropriate features for the token at the specified index with the specified array of previous outcomes to the specified list of features.

Specified by:

createFeatures in interface AdaptiveFeatureGenerator

Parameters:

features - The list of features to be added to.

tokens - The tokens of the sentence or other text unit being processed.

index - The index of the token which is currently being processed.

previousOutcomes - The outcomes for the tokens prior to the specified index.

updateAdaptiveData

public void updateAdaptiveData(java.lang.String[] tokens,
                               java.lang.String[] outcomes)

Description copied from interface: AdaptiveFeatureGenerator

Informs the feature generator that the specified tokens have been classified with the corresponding set of specified outcomes.

Specified by:

updateAdaptiveData in interface AdaptiveFeatureGenerator

Parameters:

tokens - The tokens of the sentence or other text unit which has been processed.

outcomes - The outcomes associated with the specified tokens.

clearAdaptiveData

public void clearAdaptiveData()

Description copied from interface: AdaptiveFeatureGenerator

Informs the feature generator that the context of the adaptive data (typically a document) is no longer valid.

Specified by:

clearAdaptiveData in interface AdaptiveFeatureGenerator

getNumberOfCacheHits

public long getNumberOfCacheHits()

Retrieves the number of times a cache hit occurred.

Returns:

number of cache hits

getNumberOfCacheMisses

public long getNumberOfCacheMisses()

Retrieves the number of times a cache miss occurred.

Returns:

number of cache misses

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object