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 <?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) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @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) 2005-2015 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_Abstract
      */
     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  string $adapter
      * @return Zend_Application_Resource_Db
      */
     public function setAdapter($adapter)
     {
         $this->_adapter = $adapter;
         return $this;
     }
 
     /**
      * Adapter type to use
      *
      * @return string
      */
     public function getAdapter()
     {
         return $this->_adapter;
     }
 
     /**
      * Set the adapter params
      *
      * @param array $params
      * @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 bool $isDefaultTableAdapter
      * @return Zend_Application_Resource_Db
      */
     public function setIsDefaultTableAdapter($isDefaultTableAdapter)
     {
         $this->_isDefaultTableAdapter = $isDefaultTableAdapter;
         return $this;
     }
 
     /**
      * Is this adapter the default table adapter?
      *
      * @return bool
      */
     public function isDefaultTableAdapter()
     {
         return $this->_isDefaultTableAdapter;
     }
 
     /**
      * Retrieve initialized DB connection
      *
      * @return null|Zend_Db_Adapter_Abstract
      */
     public function getDbAdapter()
     {
         if ((null === $this->_db)
             && (null !== ($adapter = $this->getAdapter()))
         ) {
             $this->_db = Zend_Db::factory($adapter, $this->getParams());
 
             if ($this->_db instanceof Zend_Db_Adapter_Abstract 
                 && $this->isDefaultTableAdapter()
             ) {
                 Zend_Db_Table::setDefaultAdapter($this->_db);
             }
         }
         return $this->_db;
     }
 
     /**
      * Defined by Zend_Application_Resource_Resource
      *
      * @return Zend_Db_Adapter_Abstract|null
      */
     public function init()
     {
         if (null !== ($db = $this->getDbAdapter())) {
             return $db;
         }
 
         return null;
     }
 
     /**
      * 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;
     }
 }