CompoundInferencer.java

/*
 * Copyright (C) 2013 lichtflut Forschungs- und Entwicklungsgesellschaft mbH
 *
 * 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.
 */
package org.arastreju.sge.inferencing;

import de.lichtflut.infra.data.MultiMap;
import org.arastreju.sge.model.ResourceID;
import org.arastreju.sge.model.Statement;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Set;

/**
 * <p>
 *  Compound Inferencer.
 * </p>
 *
 * <p>
 * 	Created Sep 2, 2011
 * </p>
 *
 * @author Oliver Tigges
 */
public class CompoundInferencer implements Inferencer {
	
	private final MultiMap<ResourceID, Inferencer> predicateMap = new MultiMap<ResourceID, Inferencer>();
	
	private final Collection<Inferencer> common = new ArrayList<Inferencer>();
	
	// -----------------------------------------------------

	@Override
	public void addInferenced(final Statement stmt, final Set<Statement> target) {
		final Set<Inferencer> inferencers = predicateMap.getValues(stmt.getPredicate());
		for (Inferencer current : inferencers) {
			current.addInferenced(stmt, target);
		}
		for (Inferencer current : common) {
			current.addInferenced(stmt, target);
		}
	}
	
	// ----------------------------------------------------
	
	protected void addInferencer(final Inferencer inferencer, final ResourceID predicate) {
		predicateMap.add(predicate, inferencer);
	}
	
	protected void addInferencer(final Inferencer inferencer) {
		common.add(inferencer);
	}
	
}