Package opennlp.tools.util.featuregen
Class CharacterNgramFeatureGenerator
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- opennlp.tools.util.featuregen.CharacterNgramFeatureGenerator
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- All Implemented Interfaces:
AdaptiveFeatureGenerator
public class CharacterNgramFeatureGenerator extends Object implements AdaptiveFeatureGenerator
TheCharacterNgramFeatureGeneratoruses character ngrams to generate features about each token.
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Constructor Summary
Constructors Constructor Description CharacterNgramFeatureGenerator()Initializes aCharacterNgramFeatureGeneratorwith min 2 length and max 5 length of ngrams.CharacterNgramFeatureGenerator(int minLength, int maxLength)Initializes aCharacterNgramFeatureGenerator.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidcreateFeatures(List<String> features, String[] tokens, int index, String[] preds)Adds the appropriate features for the token at the specifiedindexwith the specified array ofpreviousOutcomesto the specified list of features.-
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface opennlp.tools.util.featuregen.AdaptiveFeatureGenerator
clearAdaptiveData, updateAdaptiveData
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Constructor Detail
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CharacterNgramFeatureGenerator
public CharacterNgramFeatureGenerator(int minLength, int maxLength)Initializes aCharacterNgramFeatureGenerator.- Parameters:
minLength- The minimum length to use. Must not be negative.maxLength- The maximum length to use. Must not be negative.
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CharacterNgramFeatureGenerator
public CharacterNgramFeatureGenerator()
Initializes aCharacterNgramFeatureGeneratorwith min 2 length and max 5 length of ngrams.
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Method Detail
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createFeatures
public void createFeatures(List<String> features, String[] tokens, int index, String[] preds)
Description copied from interface:AdaptiveFeatureGeneratorAdds the appropriate features for the token at the specifiedindexwith the specified array ofpreviousOutcomesto the specified list of features.- Specified by:
createFeaturesin interfaceAdaptiveFeatureGenerator- 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.preds- The outcomes for the tokens prior to the specified index.
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