<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Application

 * @subpackage Resource

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Db.php 22544 2010-07-10 15:01:37Z freak $

 */

/**

 * @see Zend_Application_Resource_ResourceAbstract

 */

require_once 'Zend/Application/Resource/ResourceAbstract.php';

/**

 * Resource for creating database adapter

 *

 * @uses       Zend_Application_Resource_ResourceAbstract

 * @category   Zend

 * @package    Zend_Application

 * @subpackage Resource

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Application_Resource_Db extends Zend_Application_Resource_ResourceAbstract

{

    /**

     * Adapter to use

     *

     * @var string

     */

    protected $_adapter = null;

    /**

     * @var Zend_Db_Adapter_Interface

     */

    protected $_db;

    /**

     * Parameters to use

     *

     * @var array

     */

    protected $_params = array();

    /**

     * Wether to register the created adapter as default table adapter

     *

     * @var boolean

     */

    protected $_isDefaultTableAdapter = true;

    /**

     * Set the adapter

     *

     * @param  $adapter string

     * @return Zend_Application_Resource_Db

     */

    public function setAdapter($adapter)

    {

        $this->_adapter = $adapter;

        return $this;

    }

    /**

     * Adapter type to use

     *

     * @return string

     */

    public function getAdapter()

    {

        return $this->_adapter;

    }

    /**

     * Set the adapter params

     *

     * @param  $adapter string

     * @return Zend_Application_Resource_Db

     */

    public function setParams(array $params)

    {

        $this->_params = $params;

        return $this;

    }

    /**

     * Adapter parameters

     *

     * @return array

     */

    public function getParams()

    {

        return $this->_params;

    }

    /**

     * Set whether to use this as default table adapter

     *

     * @param  boolean $defaultTableAdapter

     * @return Zend_Application_Resource_Db

     */

    public function setIsDefaultTableAdapter($isDefaultTableAdapter)

    {

        $this->_isDefaultTableAdapter = $isDefaultTableAdapter;

        return $this;

    }

    /**

     * Is this adapter the default table adapter?

     *

     * @return void

     */

    public function isDefaultTableAdapter()

    {

        return $this->_isDefaultTableAdapter;

    }

    /**

     * Retrieve initialized DB connection

     *

     * @return null|Zend_Db_Adapter_Interface

     */

    public function getDbAdapter()

    {

        if ((null === $this->_db)

            && (null !== ($adapter = $this->getAdapter()))

        ) {

            $this->_db = Zend_Db::factory($adapter, $this->getParams());

        }

        return $this->_db;

    }

    /**

     * Defined by Zend_Application_Resource_Resource

     *

     * @return Zend_Db_Adapter_Abstract|null

     */

    public function init()

    {

        if (null !== ($db = $this->getDbAdapter())) {

            if ($this->isDefaultTableAdapter()) {

                Zend_Db_Table::setDefaultAdapter($db);

            }

            return $db;

        }

    }

    /**

     * Set the default metadata cache

     * 

     * @param string|Zend_Cache_Core $cache

     * @return Zend_Application_Resource_Db

     */

    public function setDefaultMetadataCache($cache)

    {

        $metadataCache = null;

        if (is_string($cache)) {

            $bootstrap = $this->getBootstrap();

            if ($bootstrap instanceof Zend_Application_Bootstrap_ResourceBootstrapper

                && $bootstrap->hasPluginResource('CacheManager')

            ) {

                $cacheManager = $bootstrap->bootstrap('CacheManager')

                    ->getResource('CacheManager');

                if (null !== $cacheManager && $cacheManager->hasCache($cache)) {

                    $metadataCache = $cacheManager->getCache($cache);

                }

            }

        } else if ($cache instanceof Zend_Cache_Core) {

            $metadataCache = $cache;

        }

        if ($metadataCache instanceof Zend_Cache_Core) {

            Zend_Db_Table::setDefaultMetadataCache($metadataCache);

        }

        return $this;

    }

}