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• 1.5.1
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• AllDomainBootstrapper.java

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fr.lirmm.graphik.integraal.homomorphism.bootstrapper.AllDomainBootstrapper Maven / Gradle / Ivy

/*
 * Copyright (C) Inria Sophia Antipolis - Méditerranée / LIRMM
 * (Université de Montpellier & CNRS) (2014 - 2017)
 *
 * Contributors :
 *
 * Clément SIPIETER 
 * Mélanie KÖNIG
 * Swan ROCHER
 * Jean-François BAGET
 * Michel LECLÈRE
 * Marie-Laure MUGNIER 
 *
 *
 * This file is part of Graal .
 *
 * This software is governed by the CeCILL  license under French law and
 * abiding by the rules of distribution of free software.  You can  use,
 * modify and/ or redistribute the software under the terms of the CeCILL
 * license as circulated by CEA, CNRS and INRIA at the following URL
 * "http://www.cecill.info".
 *
 * As a counterpart to the access to the source code and  rights to copy,
 * modify and redistribute granted by the license, users are provided only
 * with a limited warranty  and the software's author,  the holder of the
 * economic rights,  and the successive licensors  have only  limited
 * liability.
 *
 * In this respect, the user's attention is drawn to the risks associated
 * with loading,  using,  modifying and/or developing or reproducing the
 * software by the user in light of its specific status of free software,
 * that may mean  that it is complicated to manipulate,  and  that  also
 * therefore means  that it is reserved for developers  and  experienced
 * professionals having in-depth computer knowledge. Users are therefore
 * encouraged to load and test the software's suitability as regards their
 * requirements in conditions enabling the security of their systems and/or
 * data to be ensured and,  more generally, to use and operate it in the
 * same conditions as regards security.
 *
 * The fact that you are presently reading this means that you have had
 * knowledge of the CeCILL license and that you accept its terms.
 */
package fr.lirmm.graphik.integraal.homomorphism.bootstrapper;

import java.util.Collection;

import fr.lirmm.graphik.integraal.api.core.Atom;
import fr.lirmm.graphik.integraal.api.core.AtomSet;
import fr.lirmm.graphik.integraal.api.core.AtomSetException;
import fr.lirmm.graphik.integraal.api.core.RulesCompilation;
import fr.lirmm.graphik.integraal.api.core.Term;
import fr.lirmm.graphik.integraal.homomorphism.BacktrackException;
import fr.lirmm.graphik.integraal.homomorphism.VarSharedData;
import fr.lirmm.graphik.util.profiler.AbstractProfilable;
import fr.lirmm.graphik.util.stream.CloseableIterator;

/**
 * This implementation uses all domain (all terms from data) to bootstrap.
 *
 * @author Clément Sipieter (INRIA) {@literal }
 *
 */
public class AllDomainBootstrapper extends AbstractProfilable implements Bootstrapper {

	private static AllDomainBootstrapper instance;

	protected AllDomainBootstrapper() {
		super();
	}

	public static synchronized AllDomainBootstrapper instance() {
		if (instance == null)
			instance = new AllDomainBootstrapper();

		return instance;
	}

	// /////////////////////////////////////////////////////////////////////////
	//
	// /////////////////////////////////////////////////////////////////////////

	@Override
	public CloseableIterator exec(VarSharedData v, Collection preAtoms, Collection postAtoms, AtomSet data, RulesCompilation compilation)
	    throws BacktrackException {
		try {
			return data.termsIterator();
		} catch (AtomSetException e) {
			throw new BacktrackException(e);
		}
	}
}