package org.liveontologies.protege.explanation.justification;

/*-
 * #%L
 * Protege Justification Explanation
 * $Id:$
 * $HeadURL:$
 * %%
 * Copyright (C) 2016 - 2017 Live Ontologies Project
 * %%
 * 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.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import org.semanticweb.owl.explanation.api.Explanation;
import org.semanticweb.owlapi.model.OWLAxiom;

/**
 * Author: Matthew Horridge
 * Stanford University
 * Bio-Medical Informatics Research Group
 * Date: 20/03/2012
 */

public class AxiomsCache {
	private Map<OWLAxiom, Set<Explanation<OWLAxiom>>> cache = new HashMap<>();

	public boolean contains(OWLAxiom entailment) {
		return cache.containsKey(entailment);
	}

	public Set<Explanation<OWLAxiom>> get(OWLAxiom entailment) {
		Set<Explanation<OWLAxiom>> explanations = cache.get(entailment);
		if (explanations == null) {
			return Collections.emptySet();
		}
		return new HashSet<>(explanations);
	}

	public void put(Explanation<OWLAxiom> explanation) {
		Set<Explanation<OWLAxiom>> expls = cache.get(explanation.getEntailment());
		if (expls == null) {
			expls = new HashSet<>();
			cache.put(explanation.getEntailment(), expls);
		}
		expls.add(explanation);
	}

	public void put(Set<Explanation<OWLAxiom>> explanations) {
		for (Explanation<OWLAxiom> expl : explanations) {
			put(expl);
		}
	}

	public void clear() {
		cache.clear();
	}

	public void clear(OWLAxiom entailment) {
		cache.remove(entailment);
	}

}
@@ -1517,29 +1517,43 @@
 %09return 
-new Hash
+Collections.unmodifiable
 Set
-%3C%3E
 (explana

Fix caching of justifications