Class DefaultNameContextGenerator

java.lang.Object

opennlp.tools.namefind.DefaultNameContextGenerator

All Implemented Interfaces:

opennlp.tools.namefind.NameContextGenerator, opennlp.tools.util.BeamSearchContextGenerator<String>

public class DefaultNameContextGenerator
extends Object
implements opennlp.tools.namefind.NameContextGenerator

A NameContextGenerator implementation for determining contextual features for a tag-chunk style named-entity recognizer.

Constructor Summary

Constructors

Constructor	Description
DefaultNameContextGenerator(opennlp.tools.util.featuregen.AdaptiveFeatureGenerator... featureGenerators)	Creates a name context generator with the specified feature generators.

Method Summary

Modifier and Type	Method	Description
void	addFeatureGenerator(opennlp.tools.util.featuregen.AdaptiveFeatureGenerator generator)
void	clearAdaptiveData()
String[]	getContext(int index, String[] tokens, String[] preds, Object[] additionalContext)	Finds the context for finding names at the specified index.
void	updateAdaptiveData(String[] tokens, String[] outcomes)

Methods inherited from class Object

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

Constructor Details

DefaultNameContextGenerator

public DefaultNameContextGenerator(opennlp.tools.util.featuregen.AdaptiveFeatureGenerator... featureGenerators)

Creates a name context generator with the specified feature generators.

Parameters:

featureGenerators - One or more feature generators.

Method Details

addFeatureGenerator

public void addFeatureGenerator(opennlp.tools.util.featuregen.AdaptiveFeatureGenerator generator)

Specified by:

addFeatureGenerator in interface opennlp.tools.namefind.NameContextGenerator

updateAdaptiveData

public void updateAdaptiveData(String[] tokens,
 String[] outcomes)

Specified by:

updateAdaptiveData in interface opennlp.tools.namefind.NameContextGenerator

clearAdaptiveData

public void clearAdaptiveData()

Specified by:

clearAdaptiveData in interface opennlp.tools.namefind.NameContextGenerator

getContext

public String[] getContext(int index,
 String[] tokens,
 String[] preds,
 Object[] additionalContext)

Finds the context for finding names at the specified index.

Specified by:

getContext in interface opennlp.tools.util.BeamSearchContextGenerator<String>

Parameters:

index - The index of the token in the specified tokens for which the context should be constructed.

tokens - The tokens of the sentence. The toString() methods of these objects should return the token text.

preds - The previous decisions made in the tagging of this sequence. Only indices less than index will be examined.

additionalContext - Addition features which may be based on a context outside the sentence.

Returns:

The context for finding names at the specified index.