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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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package org.apache.cayenne.unit.di.server;

import org.apache.cayenne.configuration.ConfigurationTree;
import org.apache.cayenne.configuration.DataChannelDescriptor;
import org.apache.cayenne.configuration.XMLDataChannelDescriptorLoader;
import org.apache.cayenne.di.Inject;
import org.apache.cayenne.di.Injector;
import org.apache.cayenne.map.DataMap;
import org.apache.cayenne.map.DbEntity;
import org.apache.cayenne.resource.URLResource;
import org.apache.cayenne.unit.UnitDbAdapter;

import java.net.URL;
import java.sql.SQLException;
import java.util.List;

public class DBCleaner {

    private FlavoredDBHelper dbHelper;
    private String location;

    @Inject
    private SchemaBuilder schemaBuilder;

    @Inject
    private UnitDbAdapter accessStackAdapter;

    @Inject
    private Injector injector;

    public DBCleaner(FlavoredDBHelper dbHelper, String location) {
        this.dbHelper = dbHelper;
        this.location = location;
    }

    public void clean() throws SQLException {
        XMLDataChannelDescriptorLoader loader = new XMLDataChannelDescriptorLoader();
        injector.injectMembers(loader);

        URL url = getClass().getClassLoader().getResource(location);
        ConfigurationTree<DataChannelDescriptor> tree = loader.load(new URLResource(url));

        for (DataMap map : tree.getRootNode().getDataMaps()) {
            List<DbEntity> entities = schemaBuilder.dbEntitiesInDeleteOrder(map);

            for (DbEntity entity : entities) {
                dbHelper.deleteAll(entity.getName());
            }
        }
    }
}