package edu.northwestern.at.utils.corpuslinguistics.postagger;

/*	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.adornedword.*;
import edu.northwestern.at.utils.corpuslinguistics.lexicon.*;
import edu.northwestern.at.utils.corpuslinguistics.postagger.guesser.*;
import edu.northwestern.at.utils.corpuslinguistics.postagger.transitionmatrix.*;
import edu.northwestern.at.utils.corpuslinguistics.postagger.trigram.*;
import edu.northwestern.at.utils.corpuslinguistics.tokenizer.*;

/**	Default Part of Speech tagger.
 *
 *	<p>
 *	The default part of speech tagger is a trigram tagger using
 *	the NUPOS part of speech tag set.
 *	</p>
 */

public class DefaultPartOfSpeechTagger
	extends TrigramTagger
	implements PartOfSpeechTagger
{
	/**	Create default part of speech tagger.
	 *
	 *	@throws	Exception	when tagger initialization fails.
	 */

	public DefaultPartOfSpeechTagger()
		throws Exception
	{
		super();
								//	Get word and suffix lexicon.

		Lexicon lexicon			= new DefaultWordLexicon();
		Lexicon suffixLexicon	= new DefaultSuffixLexicon();

								//	Set word lexicon into tagger.

		setLexicon( lexicon );

								//	Load transition matrix.

		setTransitionMatrix( new DefaultTransitionMatrix() );

								//	Create part of speech guesser.

		PartOfSpeechGuesser guesser	= new DefaultPartOfSpeechGuesser();

								//	Add lexicons to guesser.

		guesser.setWordLexicon( lexicon );

		guesser.setSuffixLexicon( suffixLexicon );

								//	Set guesser into tagger.

		setPartOfSpeechGuesser( guesser );
	}
}

/*
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   Northwestern University
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