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 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
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 *    http://www.apache.org/licenses/LICENSE-2.0
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 *  Unless required by applicable law or agreed to in writing,
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package org.apache.cayenne.reflect.generic;

import org.apache.cayenne.DataObject;
import org.apache.cayenne.reflect.PersistentDescriptor;
import org.apache.cayenne.reflect.PropertyException;

/**
 * A ClassDescriptor for "generic" persistent classes implementing {@link DataObject}
 * interface.
 * 
 * @since 3.0
 * @author Andrus Adamchik
 */
// non-public as the only difference with the superclass is version handling on merge -
// this is something we need to solved in a more generic fashion (e.g. as via enhancer)
// for other object types.
class DataObjectDescriptor extends PersistentDescriptor {

    @Override
    public void shallowMerge(Object from, Object to) throws PropertyException {
        super.shallowMerge(from, to);

        if (from instanceof DataObject && to instanceof DataObject) {
            ((DataObject) to)
                    .setSnapshotVersion(((DataObject) from).getSnapshotVersion());
        }
    }
}
