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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 uk.ac.manchester.cs.owl.owlapi;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import javax.annotation.Nonnull;

import org.semanticweb.owlapi.model.*;

/**
 * @author Matthew Horridge, The University Of Manchester, Bio-Health
 *         Informatics Group
 * @since 2.0.0
 */
public class OWLDisjointObjectPropertiesAxiomImpl extends
        OWLNaryPropertyAxiomImpl implements
        OWLDisjointObjectPropertiesAxiom {

    private static final long serialVersionUID = 40000L;

    /**
     * @param properties
     *        disjoint properties
     * @param annotations
     *        annotations
     */
    public OWLDisjointObjectPropertiesAxiomImpl(
            @Nonnull Set properties,
            @Nonnull Collection annotations) {
        super(properties, annotations);
    }

    @Nonnull
    @Override
    public OWLDisjointObjectPropertiesAxiom getAxiomWithoutAnnotations() {
        if (!isAnnotated()) {
            return this;
        }
        return new OWLDisjointObjectPropertiesAxiomImpl(getProperties(),
                NO_ANNOTATIONS);
    }

    @Nonnull
    @Override
    public OWLDisjointObjectPropertiesAxiom getAnnotatedAxiom(
            @Nonnull Set annotations) {
        return new OWLDisjointObjectPropertiesAxiomImpl(getProperties(),
                mergeAnnos(annotations));
    }

    @Nonnull
    @Override
    public Set asPairwiseAxioms() {
        Set result = new HashSet<>();
        List list = new ArrayList<>(
                getProperties());
        for (int i = 0; i < list.size() - 1; i++) {
            for (int j = i + 1; j < list.size(); j++) {
                result.add(new OWLDisjointObjectPropertiesAxiomImpl(
                        new HashSet<>(Arrays.asList(list.get(i), list.get(j))),
                        NO_ANNOTATIONS));
            }
        }
        return result;
    }

    @Override
    public Set splitToAnnotatedPairs() {
        List ops = new ArrayList<>(getProperties());
        if (ops.size() == 2) {
            return Collections
                    . singleton(this);
        }
        Set result = new HashSet<>();
        for (int i = 0; i < ops.size() - 1; i++) {
            OWLObjectPropertyExpression indI = ops.get(i);
            OWLObjectPropertyExpression indJ = ops.get(i + 1);
            result.add(new OWLDisjointObjectPropertiesAxiomImpl(new HashSet<>(
                    Arrays.asList(indI, indJ)), getAnnotations()));
        }
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        return super.equals(obj)
                && obj instanceof OWLDisjointObjectPropertiesAxiom;
    }

    @Override
    public void accept(@Nonnull OWLAxiomVisitor visitor) {
        visitor.visit(this);
    }

    @Override
    public void accept(@Nonnull OWLObjectVisitor visitor) {
        visitor.visit(this);
    }

    @Override
    public  O accept(@Nonnull OWLAxiomVisitorEx visitor) {
        return visitor.visit(this);
    }

    @Override
    public  O accept(@Nonnull OWLObjectVisitorEx visitor) {
        return visitor.visit(this);
    }

    @Override
    public AxiomType getAxiomType() {
        return AxiomType.DISJOINT_OBJECT_PROPERTIES;
    }
}