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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 a value representing the OWLAPI release it is compatible with. Note that the group id for the upstream HermiT is com.hermit-reasoner, while this fork is released under net.sourceforge.owlapi. This fork exists to allow HermiT users to use newer OWLAPI versions than the ones supported by the original HermiT codebase. 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 2008, 2009, 2010 by the Oxford University Computing Laboratory
   
   This file is part of HermiT.

   HermiT is free software: you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
   
   HermiT 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 Lesser General Public License for more details.
   
   You should have received a copy of the GNU Lesser General Public License
   along with HermiT.  If not, see .
*/
package org.semanticweb.HermiT.model;

import org.semanticweb.HermiT.Prefixes;

/**
 * Represents an atomic concept.
 */
public class AtomicConcept extends LiteralConcept implements DLPredicate {
    private static final long serialVersionUID=-1078274072706143620L;

    protected final String m_iri;
    
    protected AtomicConcept(String iri) {
        m_iri=iri;
    }
    /**
     * @return iri
     */
    public String getIRI() {
        return m_iri;
    }
    @Override
    public int getArity() {
        return 1;
    }
    @Override
    public LiteralConcept getNegation() {
        if (this==THING)
            return NOTHING;
        else if (this==NOTHING)
            return THING;
        else
            return AtomicNegationConcept.create(this);
    }
    @Override
    public boolean isAlwaysTrue() {
        return this==THING;
    }
    @Override
    public boolean isAlwaysFalse() {
        return this==NOTHING;
    }
    @Override
    public String toString(Prefixes prefixes) {
        return prefixes.abbreviateIRI(m_iri);
    }
    protected Object readResolve() {
        return s_interningManager.intern(this);
    }

    protected static final InterningManager s_interningManager=new InterningManager() {
        @Override
        protected boolean equal(AtomicConcept object1,AtomicConcept object2) {
            return object1.m_iri.equals(object2.m_iri);
        }
        @Override
        protected int getHashCode(AtomicConcept object) {
            return object.m_iri.hashCode();
        }
    };
    
    /**
     * @param uri iri
     * @return concept
     */
    public static AtomicConcept create(String uri) {
        return s_interningManager.intern(new AtomicConcept(uri));
    }

    /**
     * Thing.
     */
    public static final AtomicConcept THING=create("http://www.w3.org/2002/07/owl#Thing");
    /**
     * Nothing.
     */
    public static final AtomicConcept NOTHING=create("http://www.w3.org/2002/07/owl#Nothing");
    /**
     * Internal.
     */
    public static final AtomicConcept INTERNAL_NAMED=create("internal:nam#Named");
}