<?php
  /*
   *  $Id$
   *
   * 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 MIT license. For more information, see
   * <http://www.doctrine-project.org>.
   */
  
  namespace Doctrine\DBAL\Logging;
  
  /**
   * Includes executed SQLs in a Debug Stack
   *
   * 
   * @link    www.doctrine-project.org
   * @since   2.0
   * @version $Revision$
   * @author  Benjamin Eberlei <kontakt@beberlei.de>
   * @author  Guilherme Blanco <guilhermeblanco@hotmail.com>
   * @author  Jonathan Wage <jonwage@gmail.com>
   * @author  Roman Borschel <roman@code-factory.org>
   */
  class DebugStack implements SQLLogger
  {
      /** @var array $queries Executed SQL queries. */
      public $queries = array();
  
      /** @var boolean $enabled If Debug Stack is enabled (log queries) or not. */
      public $enabled = true;
  
      public $start = null;
  
      public $currentQuery = 0;
  
      /**
       * {@inheritdoc}
       */
      public function startQuery($sql, array $params = null, array $types = null)
      {
          if ($this->enabled) {
              $this->start = microtime(true);
              $this->queries[++$this->currentQuery] = array('sql' => $sql, 'params' => $params, 'types' => $types, 'executionMS' => 0);
          }
      }
  
      /**
       * {@inheritdoc}
       */
      public function stopQuery()
      {
          if ($this->enabled) {
              $this->queries[$this->currentQuery]['executionMS'] = microtime(true) - $this->start;
          }
      }
  }