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HermiT is reasoner for ontologies written using the Web Ontology Language (OWL). Given an OWL file, HermiT can determine whether or not the ontology is consistent, identify subsumption relationships between classes, and much more. This is the maven build of HermiT and is designed for people who wish to use HermiT from within the OWL API. It is now versioned in the main HermiT version repository, although not officially supported by the HermiT developers. The version number of this package is a composite of the HermiT version and an value representing releases of this packaged version. So, 1.3.7.1 is the first release of the mavenized version of HermiT based on the 1.3.7 release of HermiT. This package includes the Jautomata library (http://jautomata.sourceforge.net/), and builds with it directly. This library appears to be no longer under active development, and so a "fork" seems appropriate. No development is intended or anticipated on this code base.

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/*______________________________________________________________________________
 * 
 * Copyright 2005 Arnaud Bailly - NORSYS/LIFL
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * (1) Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 * (2) Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *
 * (3) The name of the author may not be used to endorse or promote
 *     products derived from this software without specific prior
 *     written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Created on 20 avr. 2005
 *
 */
package rationals.properties;

import rationals.Automaton;
import rationals.transformations.Complement;
import rationals.transformations.Mix;
import rationals.transformations.Pruner;

/**
 * This class implements a basic model-checking algorithm.
 * 
 * The first automata is first complemented on its alphabet using the operation
 * {@see rationals.transformations.Complement}. It is then synchronized with
 * the second automaton using the {@see rationals.transformations.Mix}
 * operation.
 * 

 * If the langage produced is empty, then the test returns true which means that
 * automaton b contains the language of a. Else,
 * the language produced represents counterexamples of the property modelled by
 * a in b: the test returns false.
 * 
 * The resulting automaton can be retrieved using the method
 * {@see #counterExamples()}.
 * 
 * @author nono
 * @version $Id: ModelCheck.java 2 2006-08-24 14:41:48Z oqube $
 */
public class ModelCheck implements BinaryTest {

    private Automaton cex;

    /*
     * (non-Javadoc)
     * 
     * @see rationals.properties.BinaryTest#test(rationals.Automaton,
     *      rationals.Automaton)
     */
    public boolean test(Automaton a, Automaton b) {
        Automaton ca = new Complement().transform(a);
        cex = new Pruner().transform(new Mix().transform(ca, b));
        if (new isEmpty().test(ca))
            return true;
        else
            return false;
    }

    /**
     * Return the automaton resulting from this test.
     * 
     * @return an Automaton or null if
     *         {@see #test(rationals.Automaton,rationals.Automaton)}has not
     *         been called yet.
     */
    public Automaton counterExamples() {
        return cex;
    }
}