edu.umass.cs.mallet.base.pipe.iterator

Class SegmentIterator

java.lang.Object

edu.umass.cs.mallet.base.pipe.iterator.AbstractPipeInputIterator

edu.umass.cs.mallet.base.pipe.iterator.SegmentIterator

All Implemented Interfaces:

PipeInputIterator, Iterator

public class SegmentIterator
extends AbstractPipeInputIterator

Iterates over Segments extracted by a Transducer for some InstanceList.

Field Summary

Fields inherited from class edu.umass.cs.mallet.base.pipe.iterator.AbstractPipeInputIterator

parentInstance

Constructor Summary

Constructors

Constructor and Description
SegmentIterator(InstanceList ilist, Object[] startTags, Object[] inTags, ArrayList predictions) Useful when no Transduce is specified.
SegmentIterator(Instance instance, Object[] startTags, Object[] inTags, Sequence prediction) Iterate over segments in one instance.
SegmentIterator(Sequence input, Sequence predicted, Sequence truth, Object[] startTags, Object[] inTags) Iterate over segments in one labeled sequence
SegmentIterator(Transducer model, InstanceList ilist, Object[] segmentStartTags, Object[] segmentContinueTags) NOTE!: Assumes that segmentStartTags[i] corresponds to segmentContinueTags[i].
SegmentIterator(Transducer model, Instance instance, Object[] segmentStartTags, Object[] segmentContinueTags) Iterates over Segments for only one Instance.

Method Summary

Modifier and Type	Method and Description
boolean	hasNext()
Instance	nextInstance()
Segment	nextSegment()
ArrayList	toArrayList()

Methods inherited from class edu.umass.cs.mallet.base.pipe.iterator.AbstractPipeInputIterator

next, remove, setParentInstance

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

SegmentIterator

public SegmentIterator(Transducer model,
                       InstanceList ilist,
                       Object[] segmentStartTags,
                       Object[] segmentContinueTags)

NOTE!: Assumes that segmentStartTags[i] corresponds to segmentContinueTags[i].

Parameters:

model - model to segment input sequences

ilist - list of instances to be segmented

segmentStartTags - array of tags indicating the start of a segment

segmentContinueTags - array of tags indicating the continuation of a segment

SegmentIterator

public SegmentIterator(Transducer model,
                       Instance instance,
                       Object[] segmentStartTags,
                       Object[] segmentContinueTags)

Iterates over Segments for only one Instance.

SegmentIterator

public SegmentIterator(InstanceList ilist,
                       Object[] startTags,
                       Object[] inTags,
                       ArrayList predictions)

Useful when no Transduce is specified. A list of sequences specifies the output.

Parameters:

ilist - InstanceList containing sequence.

segmentStartTags - array of tags indicating the start of a segment

segmentContinueTags - array of tags indicating the continuation of a segment

predictions - list of Sequences that are the predicted output of some Transducer

SegmentIterator

public SegmentIterator(Instance instance,
                       Object[] startTags,
                       Object[] inTags,
                       Sequence prediction)

Iterate over segments in one instance.

Parameters:

ilist - InstanceList containing sequence.

segmentStartTags - array of tags indicating the start of a segment

segmentContinueTags - array of tags indicating the continuation of a segment

predictions - list of Sequences that are the predicted output of some Transducer

SegmentIterator

public SegmentIterator(Sequence input,
                       Sequence predicted,
                       Sequence truth,
                       Object[] startTags,
                       Object[] inTags)

Iterate over segments in one labeled sequence

Method Detail

nextInstance

public Instance nextInstance()

Specified by:

nextInstance in interface PipeInputIterator

Specified by:

nextInstance in class AbstractPipeInputIterator

nextSegment

public Segment nextSegment()

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator

Specified by:

hasNext in class AbstractPipeInputIterator

toArrayList

public ArrayList toArrayList()