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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;

import javax.sql.DataSource;

import org.dbunit.database.DatabaseConnection;
import org.dbunit.database.IDatabaseConnection;

/**
 * DatabaseTester that uses a {@link DataSource} to create connections.
 *
 * @author Andres Almiray ([email protected])
 * @author Felipe Leme ([email protected])
 * @author Last changed by: $Author: gommma $
 * @version $Revision: 983 $ $Date: 2009-03-14 13:01:03 +0100 (sab, 14 mar 2009) $
 * @since 2.2.0
 */
public class DataSourceDatabaseTester extends AbstractDatabaseTester
{

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

	private DataSource dataSource;

	/**
	 * Creates a new DataSourceDatabaseTester with the specified DataSource.
	 *
	 * @param dataSource the DataSource to pull connections from
	 */
	public DataSourceDatabaseTester( DataSource dataSource )
	{
		super();

        if (dataSource == null) {
            throw new NullPointerException(
                    "The parameter 'dataSource' must not be null");
        }
		this.dataSource = dataSource;
	}

	/**
     * Creates a new DataSourceDatabaseTester with the specified DataSource and schema name.
     * @param dataSource the DataSource to pull connections from
	 * @param schema The schema name to be used for new dbunit connections
	 * @since 2.4.5
	 */
	public DataSourceDatabaseTester(DataSource dataSource, String schema) 
	{
        super(schema);
        
        if (dataSource == null) {
            throw new NullPointerException(
                    "The parameter 'dataSource' must not be null");
        }
        this.dataSource = dataSource;
    }

    public IDatabaseConnection getConnection() throws Exception
	{
		logger.debug("getConnection() - start");

		assertTrue( "DataSource is not set", dataSource!=null );
		return new DatabaseConnection( dataSource.getConnection(), getSchema() );
	}
}