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/*
 * #%L
 * elk-reasoner
 * 
 * $Id$
 * $HeadURL$
 * %%
 * Copyright (C) 2011 Oxford University Computing Laboratory
 * %%
 * 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.
 * #L%
 */
package org.semanticweb.elk.reasoner.taxonomy;

import java.util.Set;

import org.semanticweb.elk.owl.interfaces.ElkClass;
import org.semanticweb.elk.owl.interfaces.ElkEntity;
import org.semanticweb.elk.owl.predefined.PredefinedElkClassFactory;
import org.semanticweb.elk.reasoner.taxonomy.impl.AbstractDistinctBottomTaxonomy;
import org.semanticweb.elk.reasoner.taxonomy.impl.AbstractUpdateableGenericTaxonomy;
import org.semanticweb.elk.reasoner.taxonomy.impl.BottomGenericTaxonomyNode;
import org.semanticweb.elk.reasoner.taxonomy.impl.ConcurrentNodeStore;
import org.semanticweb.elk.reasoner.taxonomy.impl.NonBottomGenericTaxonomyNode;
import org.semanticweb.elk.reasoner.taxonomy.model.ComparatorKeyProvider;
import org.semanticweb.elk.reasoner.taxonomy.model.GenericTaxonomyNode;
import org.semanticweb.elk.reasoner.taxonomy.model.TaxonomyNodeFactory;

/**
 * Class taxonomy that is suitable for concurrent processing. Taxonomy objects
 * are only constructed for consistent ontologies, and some consequences of this
 * are hardcoded here.
 * 
 * @author Yevgeny Kazakov
 * @author Frantisek Simancik
 * @author Markus Kroetzsch
 * @author Pavel Klinov
 * @author Peter Skocovsky
 */
public class ConcurrentClassTaxonomy
		extends AbstractUpdateableGenericTaxonomy<
				ElkClass,
				GenericTaxonomyNode.Projection,
				NonBottomGenericTaxonomyNode.Projection
		> {
	
	private final GenericTaxonomyNode.Projection bottomNode_;
	
	public ConcurrentClassTaxonomy(final PredefinedElkClassFactory elkFactory,
			final ComparatorKeyProvider classKeyProvider) {
		super(
				new ConcurrentNodeStore<
						ElkClass,
						NonBottomGenericTaxonomyNode.Projection
				>(classKeyProvider),
				new TaxonomyNodeFactory<
						ElkClass,
						NonBottomGenericTaxonomyNode.Projection,
						AbstractDistinctBottomTaxonomy<
								ElkClass,
								GenericTaxonomyNode.Projection,
								NonBottomGenericTaxonomyNode.Projection
						>
				>() {
					@Override
					public NonBottomGenericTaxonomyNode.Projection createNode(
							final Iterable members,
							final int size,
							final AbstractDistinctBottomTaxonomy<
									ElkClass,
									GenericTaxonomyNode.Projection,
									NonBottomGenericTaxonomyNode.Projection
							> taxonomy) {
						return new NonBottomGenericTaxonomyNode.Projection(
								taxonomy, members, size);
					}
				},
				elkFactory.getOwlThing());
		this.bottomNode_ = new BottomGenericTaxonomyNode.Projection(
				this, elkFactory.getOwlNothing());
	}

	@Override
	public GenericTaxonomyNode.Projection getBottomNode() {
		return bottomNode_;
	}

	@Override
	protected Set> toTaxonomyNodes(
			final Set> nodes) {
		return nodes;
	}
	
}