org.semanticweb.HermiT.model.AtomicNegationConcept Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of org.semanticweb.hermit Show documentation

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.

The newest version!

/* 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 a negation of an atomic concept.
 */
public class AtomicNegationConcept extends LiteralConcept {
    private static final long serialVersionUID=-4635386233266966577L;

    protected final AtomicConcept m_negatedAtomicConcept;
    
    protected AtomicNegationConcept(AtomicConcept negatedAtomicConcept) {
        m_negatedAtomicConcept=negatedAtomicConcept;
    }
    /**
     * @return negated concept
     */
    public AtomicConcept getNegatedAtomicConcept() {
        return m_negatedAtomicConcept;
    }
    @Override
    public LiteralConcept getNegation() {
        return m_negatedAtomicConcept;
    }
    @Override
    public boolean isAlwaysTrue() {
        return m_negatedAtomicConcept.isAlwaysFalse();
    }
    @Override
    public boolean isAlwaysFalse() {
        return m_negatedAtomicConcept.isAlwaysTrue();
    }
    @Override
    public String toString(Prefixes prefixes) {
        return "not("+m_negatedAtomicConcept.toString(prefixes)+")";
    }
    protected Object readResolve() {
        return s_interningManager.intern(this);
    }

    protected static final InterningManager s_interningManager=new InterningManager() {
        @Override
        protected boolean equal(AtomicNegationConcept object1,AtomicNegationConcept object2) {
            return object1.m_negatedAtomicConcept==object2.m_negatedAtomicConcept;
        }
        @Override
        protected int getHashCode(AtomicNegationConcept object) {
            return -object.m_negatedAtomicConcept.hashCode();
        }
    };
    
    /**
     * @param negatedAtomicConcept negatedAtomicConcept
     * @return concept
     */
    public static AtomicNegationConcept create(AtomicConcept negatedAtomicConcept) {
        return s_interningManager.intern(new AtomicNegationConcept(negatedAtomicConcept));
    }
}