SavingInferredAxioms.java

/*
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 * Elk Examples Package
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 * Copyright (C) 2011 - 2012 Department of Computer Science, University of Oxford
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 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
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package org.semanticweb.elk.owlapi.examples;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import org.semanticweb.elk.owlapi.ElkReasonerFactory;
import org.semanticweb.owlapi.apibinding.OWLManager;
import org.semanticweb.owlapi.model.IRI;
import org.semanticweb.owlapi.model.OWLAxiom;
import org.semanticweb.owlapi.model.OWLOntology;
import org.semanticweb.owlapi.model.OWLOntologyCreationException;
import org.semanticweb.owlapi.model.OWLOntologyManager;
import org.semanticweb.owlapi.model.OWLOntologyStorageException;
import org.semanticweb.owlapi.reasoner.InferenceType;
import org.semanticweb.owlapi.reasoner.OWLReasoner;
import org.semanticweb.owlapi.reasoner.OWLReasonerFactory;
import org.semanticweb.owlapi.util.InferredAxiomGenerator;
import org.semanticweb.owlapi.util.InferredEquivalentClassAxiomGenerator;
import org.semanticweb.owlapi.util.InferredOntologyGenerator;
import org.semanticweb.owlapi.util.InferredSubClassAxiomGenerator;

/**
 * This example shows how to classify an ontology and save the resulting
 * taxonomy into a new file. The example is based on the example from the OWL
 * API documentation.
 * 
 * 
 * @author Frantisek Simancik
 * @author Pavel Klinov
 * 
 *         pavel.klinov@uni-ulm.de
 * 
 */
public class SavingInferredAxioms {

	public static void main(String[] args) throws OWLOntologyStorageException,
			OWLOntologyCreationException {
		OWLOntologyManager man = OWLManager.createOWLOntologyManager();

		// Load your ontology.
		OWLOntology ont = man.loadOntologyFromOntologyDocument(new File(
				"c:/ontologies/ontology.owl"));

		// Create an ELK reasoner.
		OWLReasonerFactory reasonerFactory = new ElkReasonerFactory();
		OWLReasoner reasoner = reasonerFactory.createReasoner(ont);

		// Classify the ontology.
		reasoner.precomputeInferences(InferenceType.CLASS_HIERARCHY);

		// To generate an inferred ontology we use implementations of
		// inferred axiom generators
		List<InferredAxiomGenerator<? extends OWLAxiom>> gens = new ArrayList<InferredAxiomGenerator<? extends OWLAxiom>>();
		gens.add(new InferredSubClassAxiomGenerator());
		gens.add(new InferredEquivalentClassAxiomGenerator());

		// Put the inferred axioms into a fresh empty ontology.
		OWLOntology infOnt = man.createOntology();
		InferredOntologyGenerator iog = new InferredOntologyGenerator(reasoner,
				gens);
		iog.fillOntology(man, infOnt);

		// Save the inferred ontology.
		man.saveOntology(infOnt,
				IRI.create((new File("c:/ontologies/result.owl").toURI())));

		// Terminate the worker threads used by the reasoner.
		reasoner.dispose();
	}
}