package edu.northwestern.at.utils.corpuslinguistics.lemmatizer;
/* Please see the license information at the end of this file. */
import java.util.*;
import edu.northwestern.at.utils.*;
import edu.northwestern.at.utils.corpuslinguistics.lexicon.*;
import edu.northwestern.at.utils.corpuslinguistics.stemmer.*;
import edu.northwestern.at.utils.corpuslinguistics.tokenizer.*;
/** Use a stemmer as a pseudo-lemmatizer.
*/
abstract public class AbstractStemmerLemmatizer
extends AbstractLemmatizer
implements IsCloseable, Lemmatizer
{
/** The stemmer.
*/
protected Stemmer stemmer = null;
/** Map with spellings as keys and stems as values.
*/
protected Map<String, String> stemMap =
MapFactory.createNewMap();
/** Set the lexicon containing the lemmata.
*
* @param lexicon The lexicon. Not used here.
*
* <p>
* A no-op since the stemmer doesn't need a lexicon.
* </p>
*/
public void setLexicon( Lexicon lexicon )
{
}
/** Returns a lemma given a word and a part of speech.
*
* @param spelling The spelling.
* @param wordClass The word class.
*
* @return The lemma.
*
* <p>
* This actually returns the stemmed form of the spelling,
* not the lemma.
* </p>
*/
public String lemmatize( String spelling , String wordClass )
{
String result = "*";
if ( stemMap.containsKey( spelling ) )
{
result = (String)stemMap.get( spelling );
}
else
{
result = stemmer.stem( spelling );
stemMap.put( spelling , result );
}
return result;
}
/** Returns a lemma given a spelling.
*
* @param spelling The spelling.
*
* @return The lemma. "*" is returned if the lemma
* cannot be found.
*/
public String lemmatize( String spelling )
{
return lemmatize( spelling , "" );
}
}
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