mirror of
https://github.com/kamilwylegala/cakephp2-php8.git
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265 lines
7.6 KiB
PHP
265 lines
7.6 KiB
PHP
<?php
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/* SVN FILE: $Id$ */
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/**
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* Datasource connection manager
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*
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* Provides an interface for loading and enumerating connections defined in app/config/database.php
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*
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* PHP versions 4 and 5
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*
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* CakePHP(tm) : Rapid Development Framework (http://www.cakephp.org)
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* Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @filesource
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* @copyright Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
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* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.libs.model
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* @since CakePHP(tm) v 0.10.x.1402
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* @version $Revision$
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* @modifiedby $LastChangedBy$
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* @lastmodified $Date$
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License
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*/
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uses ('model' . DS . 'datasources' . DS . 'datasource');
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config('database');
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/**
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* Manages loaded instances of DataSource objects
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*
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* Long description for file
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*
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* @package cake
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* @subpackage cake.cake.libs.model
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*/
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class ConnectionManager extends Object {
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/**
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* Holds a loaded instance of the Connections object
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*
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* @var DATABASE_CONFIG
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* @access public
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*/
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var $config = null;
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/**
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* Holds instances DataSource objects
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*
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* @var array
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* @access protected
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*/
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var $_dataSources = array();
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/**
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* Contains a list of all file and class names used in Connection settings
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*
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* @var array
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* @access protected
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*/
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var $_connectionsEnum = array();
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/**
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* Constructor.
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*
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*/
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function __construct() {
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if (class_exists('DATABASE_CONFIG')) {
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$this->config =& new DATABASE_CONFIG();
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}
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}
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/**
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* Gets a reference to the ConnectionManger object instance
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*
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* @return object Instance
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* @access public
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* @static
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*/
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function &getInstance() {
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static $instance = array();
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if (!$instance) {
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$instance[0] =& new ConnectionManager();
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}
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return $instance[0];
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}
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/**
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* Gets a reference to a DataSource object
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*
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* @param string $name The name of the DataSource, as defined in app/config/database.php
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* @return object Instance
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* @access public
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* @static
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*/
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function &getDataSource($name) {
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$_this =& ConnectionManager::getInstance();
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if (!empty($_this->_dataSources[$name])) {
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$return =& $_this->_dataSources[$name];
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return $return;
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}
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$connections = $_this->enumConnectionObjects();
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if (!empty($connections[$name])) {
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$conn = $connections[$name];
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$class = $conn['classname'];
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$_this->loadDataSource($name);
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$_this->_dataSources[$name] =& new $class($_this->config->{$name});
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$_this->_dataSources[$name]->configKeyName = $name;
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} else {
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trigger_error(sprintf(__("ConnectionManager::getDataSource - Non-existent data source %s", true), $name), E_USER_ERROR);
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return null;
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}
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$return =& $_this->_dataSources[$name];
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return $return;
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}
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/**
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* Gets the list of available DataSource connections
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*
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* @return array List of available connections
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* @access public
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* @static
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*/
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function sourceList() {
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$_this =& ConnectionManager::getInstance();
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return array_keys($_this->_dataSources);
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}
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/**
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* Gets a DataSource name from an object reference
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*
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* @param object $source DataSource object
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* @return string Datasource name
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* @access public
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* @static
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*/
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function getSourceName(&$source) {
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$_this =& ConnectionManager::getInstance();
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$names = array_keys($_this->_dataSources);
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for ($i = 0, $count = count($names); $i < $count; $i++) {
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if ($_this->_dataSources[$names[$i]] === $source) {
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return $names[$i];
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}
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}
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return null;
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}
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/**
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* Loads the DataSource class for the given connection name
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*
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* @param mixed $connName A string name of the connection, as defined in app/config/database.php,
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* or an array containing the filename (without extension) and class name of the object,
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* to be found in app/models/datasources/ or cake/libs/model/datasources/.
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* @return boolean True on success, null on failure or false if the class is already loaded
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* @access public
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* @static
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*/
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function loadDataSource($connName) {
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$_this =& ConnectionManager::getInstance();
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if (is_array($connName)) {
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$conn = $connName;
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} else {
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$connections = $_this->enumConnectionObjects();
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$conn = $connections[$connName];
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}
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if (!empty($conn['parent'])) {
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$_this->loadDataSource($conn['parent']);
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}
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if (class_exists($conn['classname'])) {
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return false;
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}
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if (file_exists(MODELS . 'datasources' . DS . $conn['filename'] . '.php')) {
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require (MODELS . 'datasources' . DS . $conn['filename'] . '.php');
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} elseif (fileExistsInPath(LIBS . 'model' . DS . 'datasources' . DS . $conn['filename'] . '.php')) {
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require (LIBS . 'model' . DS . 'datasources' . DS . $conn['filename'] . '.php');
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} else {
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$error = __('Unable to load DataSource file %s.php', true);
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trigger_error(sprintf($error, $conn['filename']), E_USER_ERROR);
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return null;
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}
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return true;
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}
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/**
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* Gets a list of class and file names associated with the user-defined DataSource connections
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*
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* @return array An associative array of elements where the key is the connection name
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* (as defined in Connections), and the value is an array with keys 'filename' and 'classname'.
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* @access public
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* @static
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*/
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function enumConnectionObjects() {
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$_this =& ConnectionManager::getInstance();
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if (!empty($_this->_connectionsEnum)) {
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return $_this->_connectionsEnum;
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}
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$connections = get_object_vars($_this->config);
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if ($connections != null) {
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foreach ($connections as $name => $config) {
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$_this->_connectionsEnum[$name] = $_this->__getDriver($config);
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}
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return $_this->_connectionsEnum;
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} else {
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$_this->cakeError('missingConnection', array(array('className' => 'ConnectionManager')));
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}
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}
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/**
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* Dynamically creates a DataSource object at runtime, with the given name and settings
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*
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* @param string $name The DataSource name
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* @param array $config The DataSource configuration settings
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* @return object A reference to the DataSource object, or null if creation failed
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* @access public
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* @static
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*/
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function &create($name = '', $config = array()) {
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$_this =& ConnectionManager::getInstance();
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if (empty($name) || empty($config) || array_key_exists($name, $_this->_connectionsEnum)) {
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$null = null;
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return $null;
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}
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$_this->config->{$name} = $config;
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$_this->_connectionsEnum[$name] = $_this->__getDriver($config);
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$return =& $_this->getDataSource($name);
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return $return;
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}
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/**
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* Returns the file, class name, and parent for the given driver.
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*
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* @return array An indexed array with: filename, classname, and parent
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* @access private
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*/
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function __getDriver($config) {
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if (!isset($config['datasource'])) {
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$config['datasource'] = 'dbo';
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}
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if (isset($config['driver']) && $config['driver'] != null && !empty($config['driver'])) {
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$filename = $config['datasource'] . DS . $config['datasource'] . '_' . $config['driver'];
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$classname = Inflector::camelize(strtolower($config['datasource'] . '_' . $config['driver']));
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$parent = $this->__getDriver(array('datasource' => $config['datasource']));
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} else {
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$filename = $config['datasource'] . '_source';
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$classname = Inflector::camelize(strtolower($config['datasource'] . '_source'));
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$parent = null;
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}
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return array('filename' => $filename, 'classname' => $classname, 'parent' => $parent);
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}
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/**
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* Destructor.
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*
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* @access private
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*/
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function __destruct() {
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if (Configure::read('Session.save') == 'database' && function_exists('session_write_close')) {
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session_write_close();
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}
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}
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}
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?>
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