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libraries/joomla/base/adapter.php
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196
libraries/joomla/base/adapter.php
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<?php
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/**
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* @package Joomla.Platform
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* @subpackage Base
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*
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* @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
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* @license GNU General Public License version 2 or later; see LICENSE
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*/
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defined('JPATH_PLATFORM') or die;
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/**
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* Adapter Class
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* Retains common adapter pattern functions
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* Class harvested from joomla.installer.installer
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*
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* @package Joomla.Platform
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* @subpackage Base
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* @since 11.1
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*/
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class JAdapter extends JObject
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{
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/**
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* Associative array of adapters
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*
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* @var array
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* @since 11.1
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*/
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protected $_adapters = array();
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/**
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* Adapter Folder
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* @var string
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* @since 11.1
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*/
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protected $_adapterfolder = 'adapters';
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/**
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* @var string Adapter Class Prefix
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* @since 11.1
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*/
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protected $_classprefix = 'J';
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/**
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* Base Path for the adapter instance
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*
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* @var string
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* @since 11.1
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*/
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protected $_basepath = null;
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/**
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* Database Connector Object
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*
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* @var JDatabaseDriver
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* @since 11.1
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*/
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protected $_db;
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/**
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* Constructor
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*
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* @param string $basepath Base Path of the adapters
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* @param string $classprefix Class prefix of adapters
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* @param string $adapterfolder Name of folder to append to base path
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*
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* @since 11.1
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*/
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public function __construct($basepath, $classprefix = null, $adapterfolder = null)
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{
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$this->_basepath = $basepath;
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$this->_classprefix = $classprefix ? $classprefix : 'J';
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$this->_adapterfolder = $adapterfolder ? $adapterfolder : 'adapters';
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$this->_db = JFactory::getDbo();
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}
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/**
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* Get the database connector object
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*
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* @return JDatabaseDriver Database connector object
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*
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* @since 11.1
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*/
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public function getDBO()
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{
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return $this->_db;
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}
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/**
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* Set an adapter by name
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*
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* @param string $name Adapter name
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* @param object &$adapter Adapter object
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* @param array $options Adapter options
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*
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* @return boolean True if successful
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*
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* @since 11.1
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*/
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public function setAdapter($name, &$adapter = null, $options = array())
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{
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if (!is_object($adapter))
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{
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$fullpath = $this->_basepath . '/' . $this->_adapterfolder . '/' . strtolower($name) . '.php';
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if (!file_exists($fullpath))
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{
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return false;
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}
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// Try to load the adapter object
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require_once $fullpath;
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$class = $this->_classprefix . ucfirst($name);
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if (!class_exists($class))
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{
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return false;
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}
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$adapter = new $class($this, $this->_db, $options);
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}
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$this->_adapters[$name] = &$adapter;
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return true;
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}
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/**
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* Return an adapter.
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*
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* @param string $name Name of adapter to return
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* @param array $options Adapter options
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*
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* @return object Adapter of type 'name' or false
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*
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* @since 11.1
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*/
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public function getAdapter($name, $options = array())
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{
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if (!array_key_exists($name, $this->_adapters))
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{
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if (!$this->setAdapter($name, $options))
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{
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$false = false;
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return $false;
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}
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}
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return $this->_adapters[$name];
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}
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/**
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* Loads all adapters.
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*
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* @param array $options Adapter options
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*
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* @return void
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*
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* @since 11.1
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*/
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public function loadAllAdapters($options = array())
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{
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$files = new DirectoryIterator($this->_basepath . '/' . $this->_adapterfolder);
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foreach ($files as $file)
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{
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$fileName = $file->getFilename();
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// Only load for php files.
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// Note: DirectoryIterator::getExtension only available PHP >= 5.3.6
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if (!$file->isFile() || substr($fileName, strrpos($fileName, '.') + 1) != 'php')
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{
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continue;
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}
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// Try to load the adapter object
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require_once $this->_basepath . '/' . $this->_adapterfolder . '/' . $fileName;
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// Derive the class name from the filename.
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$name = str_ireplace('.php', '', ucfirst(trim($fileName)));
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$class = $this->_classprefix . ucfirst($name);
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if (!class_exists($class))
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{
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// Skip to next one
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continue;
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}
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$adapter = new $class($this, $this->_db, $options);
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$this->_adapters[$name] = clone $adapter;
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}
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}
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}
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