calhoun.analysis.crf
Class ConstrainedFeatureManager

java.lang.Object
  calhoun.analysis.crf.AbstractFeatureManager
      calhoun.analysis.crf.CompositeFeatureManager
          calhoun.analysis.crf.ConstrainedFeatureManager

All Implemented Interfaces:

FeatureManager, FeatureManagerEdge, FeatureManagerEdgeExplicitLength, FeatureManagerNode, FeatureManagerNodeExplicitLength, java.io.Serializable

public class ConstrainedFeatureManager
extends CompositeFeatureManager

a feature manager that combines it's composite feature types together into a single feature.

See Also:

Serialized Form

Constructor Summary

ConstrainedFeatureManager()

Method Summary

java.lang.String	getFeatureName(int featureIndex) Return a concatenated name
int	getNumFeatures() Composite feature managers only return 1 feature.
void	train(int startingIndex, ModelManager modelInfo, java.util.List data) Provides access to the entire training set so that FeatureManager can compute global properties and assign feature indices.

Methods inherited from class calhoun.analysis.crf.CompositeFeatureManager

addFeatureManager, addFeatureManager, evaluateEdge, evaluateEdgeLength, evaluateNode, evaluateNodeLength, getCacheStrategy, getComponentFeatures, getFeatureOffset, setComponentFeatures

Methods inherited from class calhoun.analysis.crf.AbstractFeatureManager

getInputComponent, setInputComponent

Methods inherited from class java.lang.Object

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

Methods inherited from interface calhoun.analysis.crf.FeatureManager

getInputComponent, setInputComponent

Methods inherited from interface calhoun.analysis.crf.FeatureManager

getInputComponent, setInputComponent

Methods inherited from interface calhoun.analysis.crf.FeatureManager

getInputComponent, setInputComponent

Methods inherited from interface calhoun.analysis.crf.FeatureManager

getInputComponent, setInputComponent

Constructor Detail

ConstrainedFeatureManager

public ConstrainedFeatureManager()

Method Detail

getNumFeatures

public int getNumFeatures()

Composite feature managers only return 1 feature.

Specified by:

getNumFeatures in interface FeatureManager

Overrides:

getNumFeatures in class CompositeFeatureManager

Returns:

number of features managed by this FeatureManager

getFeatureName

public java.lang.String getFeatureName(int featureIndex)

Return a concatenated name

Specified by:

getFeatureName in interface FeatureManager

Overrides:

getFeatureName in class CompositeFeatureManager

Parameters:

featureIndex - the index of this feature

Returns:

the human readable name of this feature

train

public void train(int startingIndex,
                  ModelManager modelInfo,
                  java.util.List data)

Description copied from interface: FeatureManager

Provides access to the entire training set so that FeatureManager can compute global properties and assign feature indices. This will be called before any evaluations are requested. If the FeatureManager can have a variable number of features, this must be fixed within this method.

Specified by:

train in interface FeatureManager

Overrides:

train in class CompositeFeatureManager

Parameters:

startingIndex - the feature index of the first feature owned by this FeatureManager. Each FeatureManager must use up consecutive indexes, so the last index used will be startingIndex + numFeatures - 1.

modelInfo - the model that contains this feature

data - the full list of training sequences to use to train the feature