Configuration.php

<?php 
/*
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the LGPL. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\DBAL;

use Doctrine\DBAL\Logging\SQLLogger;

/**
 * Configuration container for the Doctrine DBAL.
 *
 * @since   2.0
 * @author  Guilherme Blanco <guilhermeblanco@hotmail.com>
 * @author  Jonathan Wage <jonwage@gmail.com>
 * @author  Roman Borschel <roman@code-factory.org>
 * @internal When adding a new configuration option just write a getter/setter
 *           pair and add the option to the _attributes array with a proper default value.
 */
class Configuration
{
    /**
     * The attributes that are contained in the configuration.
     * Values are default values.
     *
     * @var array
     */
    protected $_attributes = array();

    /**
     * Sets the SQL logger to use. Defaults to NULL which means SQL logging is disabled.
     *
     * @param SQLLogger $logger
     */
    public function setSQLLogger(SQLLogger $logger)
    {
        $this->_attributes['sqlLogger'] = $logger;
    }

    /**
     * Gets the SQL logger that is used.
     * 
     * @return SQLLogger
     */
    public function getSQLLogger()
    {
        return isset($this->_attributes['sqlLogger']) ?
                $this->_attributes['sqlLogger'] : null;
    }
}