edu.northwestern.at.morphadorner.corpuslinguistics.lemmatizer

Class AbstractStemmerLemmatizer

java.lang.Object

edu.northwestern.at.utils.IsCloseableObject

edu.northwestern.at.morphadorner.corpuslinguistics.lemmatizer.AbstractLemmatizer

edu.northwestern.at.morphadorner.corpuslinguistics.lemmatizer.AbstractStemmerLemmatizer

All Implemented Interfaces:

Lemmatizer, IsCloseable, UsesLogger

Direct Known Subclasses:

LancasterStemmerLemmatizer, PorterStemmerLemmatizer

public abstract class AbstractStemmerLemmatizer
extends AbstractLemmatizer
implements IsCloseable, Lemmatizer

Use a stemmer as a pseudo-lemmatizer.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Map<java.lang.String,java.lang.String>	stemMap Map with spellings as keys and stems as values.
protected Stemmer	stemmer The stemmer.

Fields inherited from class edu.northwestern.at.morphadorner.corpuslinguistics.lemmatizer.AbstractLemmatizer

dictionary, lemmaSeparator, lemmaSeparatorString, lexicon, logger

Constructor Summary

Constructors

Constructor and Description
AbstractStemmerLemmatizer()

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String	lemmatize(java.lang.String spelling) Returns a lemma given a spelling.
java.lang.String	lemmatize(java.lang.String spelling, java.lang.String wordClass) Returns a lemma given a word and a part of speech.
void	setLexicon(Lexicon lexicon) Set the lexicon containing the lemmata.

Methods inherited from class edu.northwestern.at.morphadorner.corpuslinguistics.lemmatizer.AbstractLemmatizer

cantLemmatize, countLemmata, getLemmaSeparator, getLogger, isCompoundLemma, joinLemmata, joinLemmata, setDictionary, setLogger, splitLemma

Methods inherited from class edu.northwestern.at.utils.IsCloseableObject

close

Methods inherited from class java.lang.Object

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

Methods inherited from interface edu.northwestern.at.utils.IsCloseable

close

Methods inherited from interface edu.northwestern.at.morphadorner.corpuslinguistics.lemmatizer.Lemmatizer

cantLemmatize, countLemmata, getLemmaSeparator, isCompoundLemma, joinLemmata, joinLemmata, setDictionary, splitLemma

Field Detail

stemmer

protected Stemmer stemmer

The stemmer.

stemMap

protected java.util.Map<java.lang.String,java.lang.String> stemMap

Map with spellings as keys and stems as values.

Constructor Detail

AbstractStemmerLemmatizer

public AbstractStemmerLemmatizer()

Method Detail

setLexicon

public void setLexicon(Lexicon lexicon)

Set the lexicon containing the lemmata.

Specified by:

setLexicon in interface Lemmatizer

Overrides:

setLexicon in class AbstractLemmatizer

Parameters:

lexicon - The lexicon. Not used here.

A no-op since the stemmer doesn't need a lexicon.

lemmatize

public java.lang.String lemmatize(java.lang.String spelling,
                         java.lang.String wordClass)

Returns a lemma given a word and a part of speech.

Specified by:

lemmatize in interface Lemmatizer

Specified by:

lemmatize in class AbstractLemmatizer

Parameters:

spelling - The spelling.

wordClass - The word class.

Returns:

The lemma.

This actually returns the stemmed form of the spelling, not the lemma.

lemmatize

public java.lang.String lemmatize(java.lang.String spelling)

Returns a lemma given a spelling.

Specified by:

lemmatize in interface Lemmatizer

Specified by:

lemmatize in class AbstractLemmatizer

Parameters:

spelling - The spelling.

Returns:

The lemma. "*" is returned if the lemma cannot be found.