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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.database;

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

import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.SQLException;

/**
 * This class adapts a JDBC DataSource to a
 * {@link IDatabaseConnection}.
 *
 * @author Manuel Laflamme
 * @version $Revision$
 * @since Mar 8, 2002
 */
public class DatabaseDataSourceConnection extends AbstractDatabaseConnection
        implements IDatabaseConnection
{

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

    private final String _schema;
    private final DataSource _dataSource;
    private final String _user;
    private final String _password;
    private Connection _connection;

    public DatabaseDataSourceConnection(InitialContext context, String jndiName,
            String schema) throws NamingException, SQLException
    {
        this((DataSource)context.lookup(jndiName), schema, null, null);
    }

    public DatabaseDataSourceConnection(InitialContext context, String jndiName,
            String schema, String user, String password)
            throws NamingException, SQLException
    {
        this((DataSource)context.lookup(jndiName), schema, user, password);
    }

    public DatabaseDataSourceConnection(InitialContext context, String jndiName)
            throws NamingException, SQLException
    {
        this(context, jndiName, null);
    }

    public DatabaseDataSourceConnection(InitialContext context, String jndiName,
            String user, String password) throws NamingException, SQLException
    {
        this(context, jndiName, null, user, password);
    }

    public DatabaseDataSourceConnection(DataSource dataSource)
            throws SQLException
    {
        this(dataSource, null, null, null);
    }

    public DatabaseDataSourceConnection(DataSource dataSource, String user,
            String password) throws SQLException
    {
        this(dataSource, null, user, password);
    }

    public DatabaseDataSourceConnection(DataSource dataSource, String schema)
            throws SQLException
    {
        this(dataSource, schema, null, null);
    }

    public DatabaseDataSourceConnection(DataSource dataSource, String schema,
            String user, String password) throws SQLException
    {
        _dataSource = dataSource;
        _schema = schema;
        _user = user;
        _password = password;
    }

    ////////////////////////////////////////////////////////////////////////////
    // IDatabaseConnection interface

    public Connection getConnection() throws SQLException
    {
        logger.debug("getConnection() - start");

        if (_connection == null)
        {
            try
            {
                if (_user != null) {
                    _connection = _dataSource.getConnection(_user, _password);
                } else {
                    _connection = _dataSource.getConnection();
                }
            }
            catch (SQLException e)
            {
                logger.error("getConnection(): ", e);
                throw e;
            }
        }
        return _connection;
    }

    public String getSchema()
    {
        return _schema;
    }

    public void close() throws SQLException
    {
        logger.debug("close() - start");

        if (_connection != null)
        {
            _connection.close();
            _connection = null;
        }
    }
}




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