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The core ELK Reasoner package

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/**
 * 
 */
package org.semanticweb.elk.reasoner.saturation.inferences;

/*
 * #%L
 * ELK Reasoner
 * $Id:$
 * $HeadURL:$
 * %%
 * 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 org.semanticweb.elk.reasoner.indexing.model.IndexedObjectProperty;
import org.semanticweb.elk.reasoner.saturation.conclusions.model.ClassConclusion;
import org.semanticweb.elk.reasoner.saturation.conclusions.model.SubClassConclusion;
import org.semanticweb.elk.reasoner.saturation.context.Context;

/**
 * A {@link ClassInference} that produces {@link SubClassConclusion}s
 * 
 * @author Yevgeny Kazakov
 */
public interface SubClassInference extends ClassInference {

	/**
	 * @return the {@link IndexedObjectProperty} of the {@link Context} in which
	 *         the conclusion of this {@link SubClassInference} should
	 *         participate in inferences. It cannot be {@code null}.
	 */
	public IndexedObjectProperty getSubDestination();

	/**
	 * @return the {@link IndexedObjectProperty}, which is the same as
	 *         {@link SubClassConclusion#getTraceSubRoot()} for the conclusion
	 *         of this {@link SubClassInference} and for some of the premises of
	 *         this {@link SubClassInference}, if it has any (i.e., it is not an
	 *         {@link SubContextInitializationInference}). This value is used
	 *         for tracing of inferences. It cannot be {@code null}.
	 * 
	 * @see ClassConclusion#getTraceRoot()
	 */
	public IndexedObjectProperty getTraceSubRoot();

	public  O accept(Visitor visitor);

	/**
	 * Visitor pattern for instances
	 * 
	 * @author Yevgeny Kazakov
	 *
	 * @param 
	 *            the type of the output
	 */
	public static interface Visitor
			extends
				BackwardLinkInference.Visitor,
				PropagationInference.Visitor,
				SubContextInitializationInference.Visitor {

		// combined interface

	}

}