<?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 LGPL. For more information, see

 * <http://www.doctrine-project.org>.

 */

namespace Doctrine\Common\Cache;

/**

 * Array cache driver.

 *

 * @license http://www.opensource.org/licenses/lgpl-license.php LGPL

 * @link    www.doctrine-project.org

 * @since   2.0

 * @version $Revision: 3938 $

 * @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>

 * @author  David Abdemoulaie <dave@hobodave.com>

 */

class ArrayCache extends AbstractCache

{

    /**

     * @var array $data

     */

    private $data = array();

    /**

     * {@inheritdoc}

     */

    public function getIds()

    {

        return array_keys($this->data);

    }

    /**

     * {@inheritdoc}

     */

    protected function _doFetch($id)

    {

        if (isset($this->data[$id])) {

            return $this->data[$id];

        }

        return false;

    }

    /**

     * {@inheritdoc}

     */

    protected function _doContains($id)

    {

        return isset($this->data[$id]);

    }

    /**

     * {@inheritdoc}

     */

    protected function _doSave($id, $data, $lifeTime = 0)

    {

        $this->data[$id] = $data;

        return true;

    }

    /**

     * {@inheritdoc}

     */

    protected function _doDelete($id)

    {

        unset($this->data[$id]);

        return true;

    }

}