Package opennlp.tools.util.featuregen
Class PrefixFeatureGenerator
java.lang.Object
opennlp.tools.util.featuregen.PrefixFeatureGenerator
- All Implemented Interfaces:
AdaptiveFeatureGenerator
A feature generator implementation that generates prefix-based features.
- See Also:
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Constructor Summary
ConstructorsConstructorDescriptionIntializes a defaultPrefixFeatureGenerator.PrefixFeatureGenerator(int prefixLength) Intializes aPrefixFeatureGeneratorwith the specifiedprefixLength. -
Method Summary
Modifier and TypeMethodDescriptionvoidcreateFeatures(List<String> features, String[] tokens, int index, String[] previousOutcomes) 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, waitMethods inherited from interface opennlp.tools.util.featuregen.AdaptiveFeatureGenerator
clearAdaptiveData, updateAdaptiveData
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Constructor Details
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PrefixFeatureGenerator
public PrefixFeatureGenerator()Intializes a defaultPrefixFeatureGenerator. The prefixLength length is set to the value ofDEFAULT_MAX_LENGTH. -
PrefixFeatureGenerator
public PrefixFeatureGenerator(int prefixLength) Intializes aPrefixFeatureGeneratorwith the specifiedprefixLength.- Parameters:
prefixLength- The upper boundary prefix length to use.
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Method Details
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createFeatures
public void createFeatures(List<String> features, String[] tokens, int index, String[] previousOutcomes) 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.previousOutcomes- The outcomes for the tokens prior to the specified index.
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