owlapi-version5/api/src/main/java/org/semanticweb/owlapi/model/OWLOntologyFactory.java
/* This file is part of the OWL API.
 * The contents of this file are subject to the LGPL License, Version 3.0.
 * Copyright 2014, The University of Manchester
 * 
 * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 * This program 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 General Public License for more details.
 * You should have received a copy of the GNU General Public License along with this program.  If not, see http://www.gnu.org/licenses/.
 *
 * Alternatively, the contents of this file may be used under the terms of the Apache License, Version 2.0 in which case, the provisions of the Apache License Version 2.0 are applicable instead of those above.
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */
package org.semanticweb.owlapi.model;

import java.io.Serializable;
import java.util.concurrent.locks.ReadWriteLock;

import org.semanticweb.owlapi.io.OWLOntologyDocumentSource;

/**
 * An ontology factory is responsible from creating new ontologies and creating ontologies from
 * ontology document IRIs.
 *
 * @author Matthew Horridge, The University Of Manchester, Bio-Health Informatics Group
 * @since 2.0.0
 */
public interface OWLOntologyFactory extends Serializable {

    /**
     * Creates an (empty) ontology.
     *
     * @param manager the ontology manager to set.
     * @param ontologyID The ID of the ontology to create. This MUST NOT BE {@code null}.
     * @param documentIRI The document IRI of the ontology
     * @param handler The ontology creation handler that will be notified when the ontology has been
     *        created.
     * @return The newly created ontology
     * @throws OWLOntologyCreationException if the ontology could not be created.
     */
    OWLOntology createOWLOntology(OWLOntologyManager manager, OWLOntologyID ontologyID,
        IRI documentIRI, OWLOntologyCreationHandler handler) throws OWLOntologyCreationException;

    /**
     * Creates and loads an {@code OWLOntology}.
     *
     * @param manager the ontology manager to set.
     * @param documentSource The document source that provides the means of getting a representation
     *        of a document.
     * @param handler A pointer to an {@code OWLOntologyCreationHandler} which will be notified
     *        immediately after and empty ontology has been created, but before the source data is
     *        read and the ontology is loaded with axioms.
     * @param configuration A configuration object which can be used to pass various options to the
     *        loader.
     * @return The newly created and loaded ontology.
     * @throws OWLOntologyCreationException if the ontology could not be created
     */
    OWLOntology loadOWLOntology(OWLOntologyManager manager,
        OWLOntologyDocumentSource documentSource, OWLOntologyCreationHandler handler,
        OWLOntologyLoaderConfiguration configuration) throws OWLOntologyCreationException;

    /**
     * Determines if the factory can create an ontology for the specified ontology document IRI.
     *
     * @param documentIRI The document IRI
     * @return {@code true} if the factory can create an ontology given the specified document IRI,
     *         or {@code false} if the factory cannot create an ontology given the specified
     *         document IRI.
     */
    boolean canCreateFromDocumentIRI(IRI documentIRI);

    /**
     * Determines if the factory can load an ontology for the specified input source.
     *
     * @param documentSource The input source from which to load the ontology
     * @return {@code true} if the factory can load from the specified input source.
     */
    boolean canAttemptLoading(OWLOntologyDocumentSource documentSource);

    /**
     * Override the lock in the ontology builder; this is a workaround for #806
     * 
     * @param lock overriding lock instance to use
     */
    default void setLock(@SuppressWarnings("unused") ReadWriteLock lock) {
        // do nothing for the default implementation
    }

    /**
     * An {@code OWLOntologyCreationHandler} gets notified when the factory has created an empty
     * ontology (during the loading process). This may be needed to handle features such as cyclic
     * imports. For example if OntA and OntB are ontologies and OntA imports OntB and vice versa,
     * OntA will probably be partially loaded, but then will require the loading of OntB to ensure
     * that all entities are declared. OntB will also require the partial loading of OntA for the
     * same reason. The handler allows a reference to an ontology which is being loaded to be
     * obtained before loading is finished.
     */
    interface OWLOntologyCreationHandler {

        /**
         * The factory calls this method as soon as it has created an ontology. If the factory is
         * loading an ontology then the ontology will not have been populated with axioms at this
         * stage.
         *
         * @param ontology The newly created ontology.
         */
        void ontologyCreated(OWLOntology ontology);

        /**
         * @param ontology the ontology
         * @param format the format
         */
        void setOntologyFormat(OWLOntology ontology, OWLDocumentFormat format);
    }
}
