001/**
002 * Copyright (C) 2007 - 2016, Jens Lehmann
003 *
004 * This file is part of DL-Learner.
005 *
006 * DL-Learner is free software; you can redistribute it and/or modify
007 * it under the terms of the GNU General Public License as published by
008 * the Free Software Foundation; either version 3 of the License, or
009 * (at your option) any later version.
010 *
011 * DL-Learner is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014 * GNU General Public License for more details.
015 *
016 * You should have received a copy of the GNU General Public License
017 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
018 */
019package org.dllearner.utilities.datastructures;
020
021import java.util.Collection;
022
023import org.semanticweb.owlapi.model.OWLClassExpression;
024
025/**
026 * Interface for search tree nodes, which are used in various algorithms.
027 * 
028 * @author Jens Lehmann
029 *
030 */
031public interface SearchTreeNode {
032
033        /**
034         * Gets the OWL 2 class expression at this search tree node.
035         * @return The expression at this node.
036         */
037        OWLClassExpression getExpression();
038        
039        /**
040         * The children of this node.
041         * @return The children of this node.
042         */
043        Collection<? extends SearchTreeNode> getChildren();
044}