TrustEngine.java

/**
 * Copyright (c) 2011, SOCIETIES Consortium (WATERFORD INSTITUTE OF TECHNOLOGY (TSSG), HERIOT-WATT UNIVERSITY (HWU), SOLUTA.NET 
 * (SN), GERMAN AEROSPACE CENTRE (Deutsches Zentrum fuer Luft- und Raumfahrt e.V.) (DLR), Zavod za varnostne tehnologije
 * informacijske družbe in elektronsko poslovanje (SETCCE), INSTITUTE OF COMMUNICATION AND COMPUTER SYSTEMS (ICCS), LAKE
 * COMMUNICATIONS (LAKE), INTEL PERFORMANCE LEARNING SOLUTIONS LTD (INTEL), PORTUGAL TELECOM INOVAÇÃO, SA (PTIN), IBM Corp., 
 * INSTITUT TELECOM (ITSUD), AMITEC DIACHYTI EFYIA PLIROFORIKI KAI EPIKINONIES ETERIA PERIORISMENIS EFTHINIS (AMITEC), TELECOM 
 * ITALIA S.p.a.(TI),  TRIALOG (TRIALOG), Stiftelsen SINTEF (SINTEF), NEC EUROPE LTD (NEC))
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
 * conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
 * SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.societies.privacytrust.trust.impl.engine;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import org.societies.api.privacytrust.trust.model.TrustedEntityId;
import org.societies.privacytrust.trust.api.ITrustNodeMgr;
import org.societies.privacytrust.trust.api.event.ITrustEventMgr;
import org.societies.privacytrust.trust.api.evidence.repo.ITrustEvidenceRepository;
import org.societies.privacytrust.trust.api.model.ITrustedEntity;
import org.societies.privacytrust.trust.api.repo.ITrustRepository;
import org.societies.privacytrust.trust.api.repo.TrustRepositoryException;
import org.springframework.beans.factory.annotation.Autowired;

/**
 * Describe your class here...
 *
 * @author <a href="mailto:nicolas.liampotis@cn.ntua.gr">Nicolas Liampotis</a> (ICCS)
 * @since 0.0.8
 */
public abstract class TrustEngine {
	
	/** The Trust Repository service reference. */
	@Autowired
	protected ITrustRepository trustRepo;
	
	/** The Trust Evidence Repository service reference. */
	@Autowired
	protected ITrustEvidenceRepository trustEvidenceRepo;
	
	/** The Trust Event Mgr service reference. */
	protected ITrustEventMgr trustEventMgr;
	
	/** The Trust Node Mgr service reference. */
	@Autowired
	protected ITrustNodeMgr trustNodeMgr;
	
	/** The executor service. */
	protected static ExecutorService executorService = Executors.newSingleThreadExecutor();
	
	protected TrustEngine(ITrustEventMgr trustEventMgr) {
		
		this.trustEventMgr = trustEventMgr;
	}
	
	protected ITrustedEntity createEntityIfAbsent(final TrustedEntityId trustorId,
			final TrustedEntityId trusteeId) throws TrustRepositoryException {

		ITrustedEntity entity = (ITrustedEntity) this.trustRepo.retrieveEntity(
				trustorId, trusteeId);

		return (entity == null) ? this.trustRepo.createEntity(
				trustorId, trusteeId) : entity;
	}
}