org.semanticweb.elk.owl.inferences.ElkClassInclusionObjectIntersectionOfComposition Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of elk-proofs Show documentation
Utilities to present tracing results (encoded proofs) to the user
There is a newer version: 0.36.0
package org.semanticweb.elk.owl.inferences;

import java.util.ArrayList;

/*
 * #%L
 * ELK Proofs Package
 * $Id:$
 * $HeadURL:$
 * %%
 * Copyright (C) 2011 - 2016 Department of Computer Science, University of Oxford
 * %%
 * 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%
 */

import java.util.List;

import org.semanticweb.elk.owl.interfaces.ElkClassExpression;
import org.semanticweb.elk.owl.interfaces.ElkObject;
import org.semanticweb.elk.owl.interfaces.ElkSubClassOfAxiom;

/**
 * Represents the inference:
 * 
 *  *   (1)        (n)
 *  C ⊑ C1 ... C ⊑ Cn
 * ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯
 *   C ⊑ C1 ⊓...⊓ Cn
 * 
 * 
 * @author Yevgeny Kazakov
 *
 */
public class ElkClassInclusionObjectIntersectionOfComposition
		extends AbstractElkInference {

	public final static String NAME = "Intersection Composition";

	private final ElkClassExpression subExpression_;

	private final List conjuncts_;

	ElkClassInclusionObjectIntersectionOfComposition(
			ElkClassExpression subExpression,
			List conjuncts) {
		this.subExpression_ = subExpression;
		this.conjuncts_ = conjuncts;
	}

	ElkClassInclusionObjectIntersectionOfComposition(
			ElkClassExpression subExpression, ElkClassExpression firstConjunct,
			ElkClassExpression secondConjunct) {
		this.subExpression_ = subExpression;
		List conjuncts = new ArrayList(
				2);
		this.conjuncts_ = conjuncts;
		conjuncts.add(firstConjunct);
		conjuncts.add(secondConjunct);
	}

	public ElkClassExpression getSubExpression() {
		return subExpression_;
	}

	public List getConjuncts() {
		return conjuncts_;
	}

	@Override
	public String getName() {
		return NAME;
	}

	@Override
	public int getPremiseCount() {
		return conjuncts_.size();
	}

	@Override
	public ElkSubClassOfAxiom getPremise(int index, ElkObject.Factory factory) {
		checkPremiseIndex(index);
		return factory.getSubClassOfAxiom(subExpression_,
				conjuncts_.get(index));
	}

	@Override
	public ElkSubClassOfAxiom getConclusion(ElkObject.Factory factory) {
		return factory.getSubClassOfAxiom(subExpression_,
				factory.getObjectIntersectionOf(conjuncts_));
	}

	@Override
	public  O accept(ElkInference.Visitor visitor) {
		return visitor.visit(this);
	}

	/**
	 * A factory for creating instances
	 * 
	 * @author Yevgeny Kazakov
	 *
	 */
	public interface Factory {

		ElkClassInclusionObjectIntersectionOfComposition getElkClassInclusionObjectIntersectionOfComposition(
				ElkClassExpression subExpression,
				List conjuncts);

		ElkClassInclusionObjectIntersectionOfComposition getElkClassInclusionObjectIntersectionOfComposition(
				ElkClassExpression subExpression,
				ElkClassExpression firstConjunct,
				ElkClassExpression secondConjunct);

	}

	/**
	 * The visitor pattern for instances
	 * 
	 * @author Yevgeny Kazakov
	 *
	 * @param 
	 *            the type of the output
	 */
	interface Visitor {

		O visit(ElkClassInclusionObjectIntersectionOfComposition inference);

	}

}