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/* 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.change;

import static org.semanticweb.owlapi.util.OWLAPIPreconditions.checkNotNull;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import javax.annotation.Nonnull;

import org.semanticweb.owlapi.model.OWLDataFactory;
import org.semanticweb.owlapi.model.OWLOntologyChange;

/**
 * @author Matthew Horridge, The University Of Manchester, Bio-Health
 *         Informatics Group
 * @since 2.1.0
 */
public abstract class AbstractCompositeOntologyChange implements
        OWLCompositeOntologyChange {

    private static final long serialVersionUID = 40000L;
    /** The data factory. */
    @Nonnull
    private final OWLDataFactory dataFactory;
    /** The changes. */
    @Nonnull
    private final List changes = new ArrayList<>();

    /**
     * Instantiates a new abstract composite ontology change.
     * 
     * @param dataFactory
     *        the data factory
     */
    protected AbstractCompositeOntologyChange(
            @Nonnull OWLDataFactory dataFactory) {
        this.dataFactory = checkNotNull(dataFactory,
                "dataFactory cannot be null");
    }

    /**
     * Gets the data factory.
     * 
     * @return the data factory
     */
    @Nonnull
    protected OWLDataFactory getDataFactory() {
        return dataFactory;
    }

    /**
     * Adds the change.
     * 
     * @param change
     *        the change
     */
    protected void addChange(OWLOntologyChange change) {
        changes.add(change);
    }

    /**
     * Adds the changes.
     * 
     * @param change
     *        the change
     */
    protected void addChanges(Collection change) {
        changes.addAll(change);
    }

    @Override
    public List getChanges() {
        return changes;
    }
}