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dbUnit is a JUnit extension (also usable from Ant and Maven) targeted for database-driven projects that, among other things, puts your database into a known state between test runs. This is an excellent way to avoid the myriad of problems that can occur when one test case corrupts the database and causes subsequent tests to fail or exacerbate the damage.

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/*
 *
 * The DbUnit Database Testing Framework
 * Copyright (C)2002-2004, DbUnit.org
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

package org.dbunit;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * DatabaseTester that configures a DriverManager from environment properties.

 * This class defines a set of keys for system properties that need to be
 * present in the environment before using it. Example:
 * 
 * System.setProperty( PropertiesBasedJdbcDatabaseTester.DBUNIT_DRIVER_CLASS,
 *             "com.mycompany.myDriver" );
 * System.setProperty( PropertiesBasedJdbcDatabaseTester.DBUNIT_CONNECTION_URL,
 *             "jdbc:mydb://host/dbname" );
 * System.setProperty( PropertiesBasedJdbcDatabaseTester.DBUNIT_USERNAME,
 *             "myuser" );
 * System.setProperty( PropertiesBasedJdbcDatabaseTester.DBUNIT_PASSWORD,
 *             "mypasswd" );
 * System.setProperty( PropertiesBasedJdbcDatabaseTester.DBUNIT_SCHEMA,
 *             "myschema" );
 * 
 *
 * @author Andres Almiray([email protected])
 * @author Felipe Leme ([email protected])
 * @author Last changed by: $Author: gommma $
 * @version $Revision: 788 $ $Date: 2008-08-15 15:52:03 +0200 (Fri, 15 Aug 2008) $
 * @since 2.2.0
 */
public class PropertiesBasedJdbcDatabaseTester extends JdbcDatabaseTester
{

    /**
     * Logger for this class
     */
    private static final Logger logger = LoggerFactory.getLogger(PropertiesBasedJdbcDatabaseTester.class);

   /** A key for property that defines the connection url */
   public static final String DBUNIT_CONNECTION_URL = "dbunit.connectionUrl";
   /** A key for property that defines the driver classname */
   public static final String DBUNIT_DRIVER_CLASS = "dbunit.driverClass";
   /** A key for property that defines the user's password */
   public static final String DBUNIT_PASSWORD = "dbunit.password";
   /** A key for property that defines the username */
   public static final String DBUNIT_USERNAME = "dbunit.username";
   /** A key for property that defines the database schema */
   public static final String DBUNIT_SCHEMA = "dbunit.schema";

   /** A key for property that defines the connection url */

   public PropertiesBasedJdbcDatabaseTester()
   {
      super( null, null, null, null );
   }

   protected void initialize() throws Exception
   {
        logger.debug("initialize() - start");

      setDriverClass( System.getProperty( DBUNIT_DRIVER_CLASS ) );
      setConnectionUrl( System.getProperty( DBUNIT_CONNECTION_URL ) );
      setUsername( System.getProperty( DBUNIT_USERNAME ) );
      setPassword( System.getProperty( DBUNIT_PASSWORD ) );
      setSchema( System.getProperty( DBUNIT_SCHEMA ) );
      super.initialize();
   }
}