Class CharacterNgramFeatureGenerator

java.lang.Object

opennlp.tools.util.featuregen.CharacterNgramFeatureGenerator

All Implemented Interfaces:

opennlp.tools.util.featuregen.AdaptiveFeatureGenerator

public class CharacterNgramFeatureGenerator
extends Object
implements opennlp.tools.util.featuregen.AdaptiveFeatureGenerator

The CharacterNgramFeatureGenerator uses character ngrams to generate features about each token.

See Also:

• AdaptiveFeatureGenerator

Constructor Summary

Constructors

Constructor	Description
CharacterNgramFeatureGenerator()	Initializes a CharacterNgramFeatureGenerator with default values for ngrams.
CharacterNgramFeatureGenerator(int minLength, int maxLength)	Initializes a CharacterNgramFeatureGenerator with the specified parameters.

Method Summary

Modifier and Type	Method	Description
void	createFeatures(List<String> features, String[] tokens, int index, String[] preds)

Methods inherited from class Object

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

Methods inherited from interface opennlp.tools.util.featuregen.AdaptiveFeatureGenerator

clearAdaptiveData, updateAdaptiveData

Constructor Details

CharacterNgramFeatureGenerator

public CharacterNgramFeatureGenerator(int minLength,
 int maxLength)

Initializes a CharacterNgramFeatureGenerator with the specified parameters.

Parameters:

minLength - The minimum length to use. Must not be negative.

maxLength - The maximum length to use. Must not be negative.

CharacterNgramFeatureGenerator

public CharacterNgramFeatureGenerator()

Initializes a CharacterNgramFeatureGenerator with default values for ngrams. The minimal length is set to 2 and maximum length to a value of 5.

Method Details

createFeatures

public void createFeatures(List<String> features,
 String[] tokens,
 int index,
 String[] preds)

Specified by:

createFeatures in interface opennlp.tools.util.featuregen.AdaptiveFeatureGenerator