Package opennlp.tools.util.featuregen

Class WordClusterFeatureGenerator

java.lang.Object

opennlp.tools.util.featuregen.WordClusterFeatureGenerator

All Implemented Interfaces:

AdaptiveFeatureGenerator

public class WordClusterFeatureGenerator
extends Object
implements AdaptiveFeatureGenerator

An AdaptiveFeatureGenerator implementation of a word cluster feature generator. It is based on a pre-defined WordClusterDictionary.

See Also:

• WordClusterDictionary

Constructor Summary

Constructors

Constructor	Description
WordClusterFeatureGenerator(WordClusterDictionary dict, String dictResourceKey, boolean lowerCaseDictionary)	Instantiates a WordClusterFeatureGenerator via a specified WordClusterDictionary.

Method Summary

Modifier and Type	Method	Description
void	createFeatures(List<String> features, String[] tokens, int index, String[] previousOutcomes)	Adds the appropriate features for the token at the specified index with the specified array of previousOutcomes to the specified list of features.

Methods inherited from class java.lang.Object

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

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

clearAdaptiveData, updateAdaptiveData

Constructor Details

WordClusterFeatureGenerator

public WordClusterFeatureGenerator(WordClusterDictionary dict,
 String dictResourceKey,
 boolean lowerCaseDictionary)

Instantiates a WordClusterFeatureGenerator via a specified WordClusterDictionary.

Parameters:

dict - The token dictionary to use.

dictResourceKey - The prefix to use for detected features. Typically, the value for this prefix should be "dict".

lowerCaseDictionary - true if tokens will be lower-cased during dictionary lookup, false otherwise.

Method Details

createFeatures

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

Description copied from interface: AdaptiveFeatureGenerator

Adds the appropriate features for the token at the specified index with the specified array of previousOutcomes 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.