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Hibernate's core ORM functionality

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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later
 * See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
 */
package org.hibernate.cache.spi.support;

import org.hibernate.cache.cfg.spi.CollectionDataCachingConfig;
import org.hibernate.cache.spi.CacheKeysFactory;
import org.hibernate.cache.spi.DomainDataRegion;
import org.hibernate.cache.spi.access.CollectionDataAccess;
import org.hibernate.cache.spi.access.SoftLock;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.engine.spi.SharedSessionContractImplementor;
import org.hibernate.persister.collection.CollectionPersister;

/**
 * @author Steve Ebersole
 */
public abstract class AbstractCollectionDataAccess
		extends AbstractCachedDomainDataAccess
		implements CollectionDataAccess {

	private final CacheKeysFactory keysFactory;

	public AbstractCollectionDataAccess(
			DomainDataRegion region,
			CacheKeysFactory keysFactory,
			DomainDataStorageAccess storageAccess,
			CollectionDataCachingConfig config) {
		super( region, storageAccess );
		this.keysFactory = keysFactory;
	}

	@Override
	public Object generateCacheKey(Object id, CollectionPersister persister, SessionFactoryImplementor factory, String tenantIdentifier) {
		return keysFactory.createCollectionKey( id, persister, factory, tenantIdentifier );
	}

	@Override
	public Object getCacheKeyId(Object cacheKey) {
		return keysFactory.getCollectionId( cacheKey );
	}

	@Override
	public SoftLock lockItem(SharedSessionContractImplementor session, Object key, Object version) {
		return null;
	}

	@Override
	public void unlockItem(SharedSessionContractImplementor session, Object key, SoftLock lock) {

	}

	@Override
	public SoftLock lockRegion() {
		return null;
	}

	@Override
	public void unlockRegion(SoftLock lock) {
		clearCache();
	}
}