edu.illinois.cs.cogcomp.lbj.coref.decoders
Class ExtendHeadsDecoder

java.lang.Object
  edu.illinois.cs.cogcomp.lbj.coref.decoders.DecoderWithOptions<MentionSolution>
      edu.illinois.cs.cogcomp.lbj.coref.decoders.MentionDecoder
          edu.illinois.cs.cogcomp.lbj.coref.decoders.ExtendHeadsDecoder

All Implemented Interfaces:

SolutionDecoder<MentionSolution>

public class ExtendHeadsDecoder
extends MentionDecoder

A decoder for determining the extents of the mentions, given their heads as chunks.

Field Summary

protected LBJ2.classify.Classifier	m_extendClassifier Given a head, determines whether a word is part of its extent.
protected ChunkDecoder	m_headDecoder Decodes the heads

Fields inherited from class edu.illinois.cs.cogcomp.lbj.coref.decoders.DecoderWithOptions

m_options, m_train

Constructor Summary

ExtendHeadsDecoder(LBJ2.classify.Classifier extender, ChunkDecoder headDecoder)
Constructs a decoder using an extender classifier that takes an ExtendHeadExample representing a word and a chunk and returns "true" if the word represented by the example should be part of the extent of chunk.

Method Summary

MentionSolution

decode(Doc doc) Applies a classifier to chunks to determine their extents and decode these decisions into a MentionSolution.

Methods inherited from class edu.illinois.cs.cogcomp.lbj.coref.decoders.DecoderWithOptions

getBooleanOption, getOption, getRealOption, processOption, setOption, setOption, setOption, setTrain

Methods inherited from class java.lang.Object

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

Field Detail

m_headDecoder

protected ChunkDecoder m_headDecoder

Decodes the heads

m_extendClassifier

protected LBJ2.classify.Classifier m_extendClassifier

Given a head, determines whether a word is part of its extent.

Constructor Detail

ExtendHeadsDecoder

public ExtendHeadsDecoder(LBJ2.classify.Classifier extender,
                          ChunkDecoder headDecoder)

Constructs a decoder using an extender classifier that takes an ExtendHeadExample representing a word and a chunk and returns "true" if the word represented by the example should be part of the extent of chunk. The chunks to be extended will be derived using the headDecoder.

Parameters:

extender - The classifier to decide whether a given word should be part of a given chunk.

headDecoder - The decoder used to derive the head chunks.

Method Detail

decode

public MentionSolution decode(Doc doc)

Applies a classifier to chunks to determine their extents and decode these decisions into a MentionSolution. The chunks will be discovered by the provided headDecoder. The resulting mentions do not have their metadata set.

Specified by:

decode in interface SolutionDecoder<MentionSolution>

Specified by:

decode in class MentionDecoder

Parameters:

doc - The document whose mentions should be determined.

Returns:

The mentions detected in the document, encoded as a MentionSolution.