edu.mit.jmwe.detect

Class FilterByScore

java.lang.Object

edu.mit.jmwe.detect.HasMWEDetector

edu.mit.jmwe.detect.FilterByScore

All Implemented Interfaces:

IHasMWEDetector, IMWEDetector, IMWEDetectorFilter

Direct Known Subclasses:

ConstrainLength, LeskAtLeast, MoreFrequentAsMWE

public abstract class FilterByScore
extends HasMWEDetector
implements IMWEDetectorFilter

Removes all MWEs from the wrapped detector's results whose score is "no good", where "no good" is implementation dependent.

Since:

jMWE 1.0.0

Version:

$Id: FilterByScore.java 308 2011-05-06 03:33:34Z markaf $

Author:

M.A. Finlayson

Constructor Summary

Constructors

Constructor and Description
FilterByScore(IMWEDetector detector) Constructs a new MWE detector constraint that wraps the specified MWE Detector.

Method Summary

Modifier and Type	Method and Description
<T extends IToken> java.util.List<IMWE<T>>	detect(java.util.List<T> sentence) Given a list of tokens, the detector searches for the MWEs in the list.
protected abstract <T extends IToken> IScorer<IMWE<T>>	getScorer(java.util.List<T> sentence) Returns a scoring function for the specified sentence.
protected abstract boolean	isGoodScore(double score) Returns true if the score passes the filter (i.e., the scored MWE should be kept); false otherwise

Methods inherited from class edu.mit.jmwe.detect.HasMWEDetector

getWrappedDetector

Methods inherited from class java.lang.Object

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

Methods inherited from interface edu.mit.jmwe.detect.IHasMWEDetector

getWrappedDetector

Constructor Detail

FilterByScore

public FilterByScore(IMWEDetector detector)

Constructs a new MWE detector constraint that wraps the specified MWE Detector.

Parameters:

detector - the detector wrapped by this object

Throws:

java.lang.NullPointerException - if the specified detector is null

Since:

jMWE 1.0.0

Method Detail

detect

public <T extends IToken> java.util.List<IMWE<T>> detect(java.util.List<T> sentence)

Description copied from interface: IMWEDetector

Given a list of tokens, the detector searches for the MWEs in the list. It returns a set of IMWE objects representing these multi-word expressions. The method returns an empty list if no MWEs are found; the method should never return null.

Specified by:

detect in interface IMWEDetector

Overrides:

detect in class HasMWEDetector

Type Parameters:

T - the type of the tokens in the sentence

Parameters:

sentence - a sentence which the detector should search for multi-word expressions.

Returns:

a list of IMWE objects representing the multi-word expressions found in the sentence. Returns an empty list if no multi-word expressions are found; never returns null

isGoodScore

protected abstract boolean isGoodScore(double score)

Returns true if the score passes the filter (i.e., the scored MWE should be kept); false otherwise

Parameters:

score - the score to be checked

Returns:

true if the score passes the filter (i.e., the scored MWE should be kept); false otherwise

Since:

jMWE 1.0.0

getScorer

protected abstract <T extends IToken> IScorer<IMWE<T>> getScorer(java.util.List<T> sentence)

Returns a scoring function for the specified sentence.

Type Parameters:

T - the type of token in the sentence

Parameters:

sentence - the sentence for which the scorer should be constructed

Returns:

a scorer for MWEs in the specified sentence

Since:

jMWE 1.0.0