Package com.hazelcast.hibernate.region

Source Code of com.hazelcast.hibernate.region.HazelcastNaturalIdRegion

/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.hibernate.region;

import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.hibernate.access.NonStrictReadWriteAccessDelegate;
import com.hazelcast.hibernate.access.ReadOnlyAccessDelegate;
import com.hazelcast.hibernate.access.ReadWriteAccessDelegate;
import com.hazelcast.hibernate.distributed.IMapRegionCache;
import org.hibernate.cache.CacheException;
import org.hibernate.cache.spi.CacheDataDescription;
import org.hibernate.cache.spi.NaturalIdRegion;
import org.hibernate.cache.spi.access.AccessType;
import org.hibernate.cache.spi.access.NaturalIdRegionAccessStrategy;

import java.util.Properties;

/**
* Hazelcast based implementation used to store NaturalIds
*/
public class HazelcastNaturalIdRegion extends AbstractTransactionalDataRegion<IMapRegionCache>
        implements NaturalIdRegion {

    public HazelcastNaturalIdRegion(final HazelcastInstance instance, final String regionName,
                                    final Properties props, final CacheDataDescription metadata) {
        super(instance, regionName, props, metadata, new IMapRegionCache(regionName, instance, props, metadata));
    }

    public NaturalIdRegionAccessStrategy buildAccessStrategy(final AccessType accessType) throws CacheException {
        if (null == accessType) {
            throw new CacheException(
                    "Got null AccessType while attempting to determine a proper NaturalIdRegionAccessStrategy. "
                            + "This can't happen!");
        }
        if (AccessType.READ_ONLY.equals(accessType)) {
            return new NaturalIdRegionAccessStrategyAdapter(
                    new ReadOnlyAccessDelegate<HazelcastNaturalIdRegion>(this, props));
        }
        if (AccessType.NONSTRICT_READ_WRITE.equals(accessType)) {
            return new NaturalIdRegionAccessStrategyAdapter(
                    new NonStrictReadWriteAccessDelegate<HazelcastNaturalIdRegion>(this, props));
        }
        if (AccessType.READ_WRITE.equals(accessType)) {
            return new NaturalIdRegionAccessStrategyAdapter(
                    new ReadWriteAccessDelegate<HazelcastNaturalIdRegion>(this, props));
        }
        if (AccessType.TRANSACTIONAL.equals(accessType)) {
            throw new CacheException("Transactional access is not currently supported by Hazelcast.");
        }
        throw new CacheException("Got unknown AccessType \"" + accessType
                                 + "\" while attempting to build EntityRegionAccessStrategy.");
    }
}
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