<?php

/*

 * 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;

/**

 * Zend Data Cache cache driver.

 *

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

 * @link    www.doctrine-project.org

 * @since   2.0

 * @author  Ralph Schindler <ralph.schindler@zend.com>

 */

class ZendDataCache extends AbstractCache

{

    public function __construct()

    {

        $this->setNamespace('doctrine::'); // zend data cache format for namespaces ends in ::

    }

    /**

     * {@inheritdoc}

     */

    public function getIds()

    {

        throw new \BadMethodCallException("getIds() is not supported by ZendDataCache");

    }

    /**

     * {@inheritdoc}

     */

    protected function _doFetch($id)

    {

        return zend_shm_cache_fetch($id);

    }

    /**

     * {@inheritdoc}

     */

    protected function _doContains($id)

    {

        return (zend_shm_cache_fetch($id) !== FALSE);

    }

    /**

     * {@inheritdoc}

     */

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

    {

        return zend_shm_cache_store($id, $data, $lifeTime);

    }

    /**

     * {@inheritdoc}

     */

    protected function _doDelete($id)

    {

        return zend_shm_cache_delete($id);

    }

}