<?php
/*
 *  $Id: Abstract.php 3155 2007-11-14 13:13:23Z jwage $
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * 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.phpdoctrine.org>.
 */

/**
 * @package     Doctrine
 * @subpackage  Log
 * @author      Konsta Vesterinen <kvesteri@cc.hut.fi>
 * @author      Jonathan H. Wage <jwage@mac.com>
 * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link        www.phpdoctrine.com
 * @since       1.0
 * @version     $Revision: 3155 $
 */
abstract class Doctrine_Log_Writer_Abstract
{
    /**
     * @var array of Doctrine_Log_Filter_Interface
     */
    protected $_filters = array();

    /**
     * Formats the log message before writing.
     * @var Doctrine_Log_Formatter_Interface
     */
    protected $_formatter;

    /**
     * Add a filter specific to this writer.
     *
     * @param  Doctrine_Log_Filter_Interface  $filter
     * @return void
     */
    public function addFilter($filter)
    {
        if (is_integer($filter)) {
            $filter = new Doctrine_Log_Filter_Priority($filter);
        }

        $this->_filters[] = $filter;
    }

    /**
     * Log a message to this writer.
     *
     * @param  array     $event  log data event
     * @return void
     */
    public function write($event)
    {
        foreach ($this->_filters as $filter) {
            if (! $filter->accept($event)) {
                return;
            }
        }

        // exception occurs on error
        $this->_write($event);
    }

    /**
     * Set a new formatter for this writer
     *
     * @param  Doctrine_Log_Formatter_Interface $formatter
     * @return void
     */
    public function setFormatter($formatter) {
        $this->_formatter = $formatter;
    }

    /**
     * Perform shutdown activites such as closing open resources
     *
     * @return void
     */
    public function shutdown()
    {}

    /**
     * Write a message to the log.
     *
     * @param  array  $event  log data event
     * @return void
     */
    abstract protected function _write($event);
}