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 *  distributed with this work for additional information
 *  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
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
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package org.apache.cayenne.access;

import org.apache.cayenne.CayenneException;
import org.apache.cayenne.map.DbEntity;
import org.apache.cayenne.map.ObjEntity;

/**
 * DbLoaderDelegate defines API that allows to control the behavior of DbLoader during the
 * database reverse-engineering. Delegate is also notified of the progress of
 * reverse-engineering.
 * 
 * @author Andrus Adamchik
 */
public interface DbLoaderDelegate {

    /**
     * Returns true to tell DbLoader that it is OK to overwrite DbEntity that already
     * exists in the model. If loading process should be stopped immediately, an exception
     * is thrown.
     */
    public boolean overwriteDbEntity(DbEntity ent) throws CayenneException;

    public void dbEntityAdded(DbEntity ent);

    public void dbEntityRemoved(DbEntity ent);

    public void objEntityAdded(ObjEntity ent);

    public void objEntityRemoved(ObjEntity ent);
}
