dragon.ml.seqmodel.feature

Class FeatureTypePOSPattern

java.lang.Object

dragon.ml.seqmodel.feature.AbstractFeatureType

dragon.ml.seqmodel.feature.FeatureTypePOSPattern

All Implemented Interfaces:

FeatureType

public class FeatureTypePOSPattern
extends AbstractFeatureType

This feature type will create features about part of speech patterns for segments This feature type should be wrapped by FeatureTypeStateLoop.

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

Field Summary

Fields inherited from class dragon.ml.seqmodel.feature.AbstractFeatureType

idPrefix

Constructor Summary

Constructors

Constructor and Description
FeatureTypePOSPattern(int stateNum, int tagNum)
FeatureTypePOSPattern(int stateNum, int tagNum, int maxSegmentLength)

Method Summary

Modifier and Type	Method and Description
boolean	hasNext() Tests if next feature exists
Feature	next() Gets the next feature
boolean	startScanFeaturesAt(DataSequence data, int startPos, int endPos) Starts scanning features of the given segment of a sequence

Methods inherited from class dragon.ml.seqmodel.feature.AbstractFeatureType

getTypeID, needTraining, readTrainingResult, saveTrainingResult, setTypeID, startScanFeaturesAt, supportSegment, train

Methods inherited from class java.lang.Object

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

Constructor Detail

FeatureTypePOSPattern

public FeatureTypePOSPattern(int stateNum,
                             int tagNum)

FeatureTypePOSPattern

public FeatureTypePOSPattern(int stateNum,
                             int tagNum,
                             int maxSegmentLength)

Method Detail

startScanFeaturesAt

public boolean startScanFeaturesAt(DataSequence data,
                                   int startPos,
                                   int endPos)

Description copied from interface: FeatureType

Starts scanning features of the given segment of a sequence

Parameters:

data - the sequence

startPos - the start position of the segment

endPos - the end position of the segment

Returns:

true if successfully

hasNext

public boolean hasNext()

Description copied from interface: FeatureType

Tests if next feature exists

Returns:

true if next feature exists

next

public Feature next()

Description copied from interface: FeatureType

Gets the next feature

Returns:

the next feature if any