Package opennlp.tools.util.featuregen

Class POSTaggerNameFeatureGenerator

java.lang.Object

opennlp.tools.util.featuregen.POSTaggerNameFeatureGenerator

All Implemented Interfaces:

opennlp.tools.util.featuregen.AdaptiveFeatureGenerator

@ThreadSafe
public class POSTaggerNameFeatureGenerator
extends Object
implements opennlp.tools.util.featuregen.AdaptiveFeatureGenerator

Adds the token POS tag as feature. Requires a POSTagger at runtime.

The "is this still the same sentence?" cache (a String[] of POS tags reused across the tokens of one sentence) is held per-thread via ThreadLocal, so a single instance is safe to share across multiple threads — for example when the enclosing NameFinderME is shared. Cache identity uses Arrays.equals(Object[], Object[]) (content equality), preserving the original single-threaded semantics.

See Also:

• AdaptiveFeatureGenerator
• POSTagger
• POSModel

Constructor Summary

Constructors

Constructor	Description
POSTaggerNameFeatureGenerator(POSModel aPosModel)	Initializes a POSTaggerNameFeatureGenerator with the specified POSModel.
POSTaggerNameFeatureGenerator(opennlp.tools.postag.POSTagger aPosTagger)	Initializes a POSTaggerNameFeatureGenerator with the specified POSTagger.

Method Summary

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

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

POSTaggerNameFeatureGenerator

public POSTaggerNameFeatureGenerator(opennlp.tools.postag.POSTagger aPosTagger)

Initializes a POSTaggerNameFeatureGenerator with the specified POSTagger.

Parameters:

aPosTagger - A POSTagger instance to be used.

POSTaggerNameFeatureGenerator

public POSTaggerNameFeatureGenerator(POSModel aPosModel)

Initializes a POSTaggerNameFeatureGenerator with the specified POSModel.

Parameters:

aPosModel - A POSModel to be used for the internal POSTagger.

Method Details

createFeatures

public void createFeatures(List<String> feats,
 String[] toks,
 int index,
 String[] preds)

Specified by:

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