Hibernate4BlobReplicator.java

/*
 * Copyright 2005 The Apache Software Foundation.
 *
 * 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 net.sf.beanlib.hibernate4;

import java.sql.Blob;

import net.jcip.annotations.ThreadSafe;
import net.sf.beanlib.spi.BeanTransformerSpi;
import net.sf.beanlib.spi.replicator.BlobReplicatorSpi;
import net.sf.beanlib.utils.BlobUtils;

import org.hibernate.engine.jdbc.BlobProxy;

/**
 * Hibernate 4 specific Blob Replicator.
 *
 * @author Joe D. Velopar
 */
public class Hibernate4BlobReplicator implements BlobReplicatorSpi {
    private static final Factory factory = new Factory();

    public static Factory getFactory() {
        return factory;
    }

    /**
     * Factory for {@link Hibernate4BlobReplicator}
     *
     * @author Joe D. Velopar
     */
    @ThreadSafe
    public static class Factory implements BlobReplicatorSpi.Factory {
        private Factory() {}

        @Override
        public Hibernate4BlobReplicator newBlobReplicatable(BeanTransformerSpi beanTransformer) {
            return new Hibernate4BlobReplicator();
        }
    }

    public static Hibernate4BlobReplicator newBlobReplicatable(BeanTransformerSpi beanTransformer) {
        return factory.newBlobReplicatable(beanTransformer);
    }

    private final BlobUtils blobUtils = new BlobUtils();

    private Hibernate4BlobReplicator() {}

    @Override
    public <T> T replicateBlob(Blob fromBlob, Class<T> toClass) {
        byte[] byteArray = blobUtils.toByteArray(fromBlob);
        @SuppressWarnings("unchecked")
        T ret = (T) BlobProxy.generateProxy(byteArray);
        return ret;
    }
}