observationreader.java

java实现的隐马尔科夫模型

/* jahmm package - v0.3.1 */

/*
 *  Copyright (c) 2004, Jean-Marc Francois.
 *
 *  This file is part of Jahmm.
 *  Jahmm is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  Jahmm is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Jahmm; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package be.ac.ulg.montefiore.run.jahmm.io;

import java.util.*;
import java.io.*;
import be.ac.ulg.montefiore.run.jahmm.*;


/**
 * Reads an observation up to (and including) the semi-colon.
 * <p>
 * The syntax of each observation must follow the rules given in
 * {@link ObservationSequencesReader ObservationSequencesReader} (<i>e.g.</i> 
 * the backslash character is only used to escape a new line and can't appear
 * in an observation).
 */
public abstract class ObservationReader {
 
    /**
     * Reads an
     * {@link be.ac.ulg.montefiore.run.jahmm.Observation Observation} (followed
     * by a semi-colon) out of a {@link java.io.StreamTokenizer
     * StreamTokenizer}.
     * <p>
     * The stream tokenizer syntax table must be set according to the result
     * of <code>ObservationSequencesIO.initSyntaxTable(java.io.StreamTokenizer)
     * </code> and reset to this state if modified by this method.
     *
     * @param st A stream tokenizer.
     * @return An ObservationInteger.
     */
    public abstract Observation read(StreamTokenizer st)
	throws IOException, FileFormatException;
}