eus.ixa.ixa.pipe.nerc.features

Class WindowFeatureGenerator

java.lang.Object

eus.ixa.ixa.pipe.nerc.features.WindowFeatureGenerator

All Implemented Interfaces:

opennlp.tools.util.featuregen.AdaptiveFeatureGenerator

public class WindowFeatureGenerator
extends Object
implements opennlp.tools.util.featuregen.AdaptiveFeatureGenerator

Generates previous and next features for a given AdaptiveFeatureGenerator. The window size can be specified. Features: Current token is always included unchanged Previous tokens are prefixed with p distance Next tokens are prefix with n distance

Field Summary

Fields

Modifier and Type	Field and Description
static String	NEXT_PREFIX
static String	PREV_PREFIX

Constructor Summary

Constructors

Constructor and Description
WindowFeatureGenerator(opennlp.tools.util.featuregen.AdaptiveFeatureGenerator... generators) Initializes the current instance with the given parameters.
WindowFeatureGenerator(opennlp.tools.util.featuregen.AdaptiveFeatureGenerator generator) Initializes the current instance.
WindowFeatureGenerator(opennlp.tools.util.featuregen.AdaptiveFeatureGenerator generator, int prevWindowSize, int nextWindowSize) Initializes the current instance with the given parameters.
WindowFeatureGenerator(int prevWindowSize, int nextWindowSize, opennlp.tools.util.featuregen.AdaptiveFeatureGenerator... generators) Initializes the current instance with the given parameters.

Method Summary

Modifier and Type	Method and Description
void	clearAdaptiveData()
void	createFeatures(List<String> features, String[] tokens, int index, String[] preds)
String	toString()
void	updateAdaptiveData(String[] tokens, String[] outcomes)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

PREV_PREFIX

public static final String PREV_PREFIX

See Also:

Constant Field Values

NEXT_PREFIX

public static final String NEXT_PREFIX

See Also:

Constant Field Values

Constructor Detail

WindowFeatureGenerator

public WindowFeatureGenerator(opennlp.tools.util.featuregen.AdaptiveFeatureGenerator generator,
                              int prevWindowSize,
                              int nextWindowSize)

Initializes the current instance with the given parameters.

Parameters:

generator - feature generator to apply to the window.

prevWindowSize - size of the window to the left of the current token.

nextWindowSize - size of the window to the right of the current token.

WindowFeatureGenerator

public WindowFeatureGenerator(int prevWindowSize,
                              int nextWindowSize,
                              opennlp.tools.util.featuregen.AdaptiveFeatureGenerator... generators)

Initializes the current instance with the given parameters.

Parameters:

prevWindowSize - size of the window to the left of the current token

nextWindowSize - size of the window to the right of the current token

generators - the array of feature generators

WindowFeatureGenerator

public WindowFeatureGenerator(opennlp.tools.util.featuregen.AdaptiveFeatureGenerator generator)

Initializes the current instance. The previous and next window size is 5.

Parameters:

generator - feature generator

WindowFeatureGenerator

public WindowFeatureGenerator(opennlp.tools.util.featuregen.AdaptiveFeatureGenerator... generators)

Initializes the current instance with the given parameters.

Parameters:

generators - array of feature generators

Method Detail

createFeatures

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

Specified by:

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

updateAdaptiveData

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

Specified by:

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

clearAdaptiveData

public void clearAdaptiveData()

Specified by:

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

toString

public String toString()

Overrides:

toString in class Object