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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 (C) 2011, 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.
 *
 * Copyright 2011, University of Manchester
 *
 * 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.metrics;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.semanticweb.owlapi.model.OWLClass;
import org.semanticweb.owlapi.model.OWLClassExpression;
import org.semanticweb.owlapi.model.OWLOntology;
import org.semanticweb.owlapi.model.OWLOntologyChange;
import org.semanticweb.owlapi.model.OWLOntologyManager;
import org.semanticweb.owlapi.model.OWLSubClassOfAxiom;

/** Author: Matthew Horridge

 * The University Of Manchester

 * Bio-Health Informatics Group

 * Date: 27-Jul-2007

 * 
 */
public class MaximumNumberOfNamedSuperclasses extends IntegerValuedMetric {
    /** @param owlOntologyManager
     *            manager to use */
    public MaximumNumberOfNamedSuperclasses(OWLOntologyManager owlOntologyManager) {
        super(owlOntologyManager);
    }

    @Override
    public String getName() {
        return "Maximum number of asserted named superclasses";
    }

    @Override
    public Integer recomputeMetric() {
        int count = 0;
        Set processedClasses = new HashSet();
        for (OWLOntology ont : getOntologies()) {
            for (OWLClass cls : ont.getClassesInSignature()) {
                if (!processedClasses.contains(cls)) {
                    processedClasses.add(cls);
                    int curCount = 0;
                    for (OWLClassExpression desc : cls.getSuperClasses(ont)) {
                        if (!desc.isAnonymous()) {
                            curCount++;
                        }
                    }
                    if (curCount > count) {
                        count = curCount;
                    }
                }
            }
        }
        return count;
    }

    @Override
    protected boolean isMetricInvalidated(List changes) {
        for (OWLOntologyChange chg : changes) {
            if (chg.isAxiomChange() && chg.getAxiom() instanceof OWLSubClassOfAxiom) {
                return true;
            }
        }
        return false;
    }

    @Override
    protected void disposeMetric() {}
}