diff options
Diffstat (limited to 'system/core/Loader.php')
| -rw-r--r-- | system/core/Loader.php | 174 |
1 files changed, 103 insertions, 71 deletions
diff --git a/system/core/Loader.php b/system/core/Loader.php index cce1b1277..99773c3a2 100644 --- a/system/core/Loader.php +++ b/system/core/Loader.php @@ -215,7 +215,7 @@ class CI_Loader { $params = NULL; } - $this->_ci_load_class($library, $params, $object_name); + $this->_ci_load_library($library, $params, $object_name); return $this; } @@ -949,17 +949,17 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Internal CI Class Loader + * Internal CI Library Loader * * @used-by CI_Loader::library() - * @uses CI_Loader::_ci_init_class() + * @uses CI_Loader::_ci_init_library() * * @param string $class Class name to load * @param mixed $params Optional parameters to pass to the class constructor * @param string $object_name Optional object name to assign to * @return void */ - protected function _ci_load_class($class, $params = NULL, $object_name = NULL) + protected function _ci_load_library($class, $params = NULL, $object_name = NULL) { // Get the class name, and while we're at it trim any slashes. // The directory path can be included as part of the class name, @@ -982,47 +982,22 @@ class CI_Loader { } $class = ucfirst($class); - $subclass = APPPATH.'libraries/'.$subdir.config_item('subclass_prefix').$class.'.php'; - // Is this a class extension request? - if (file_exists($subclass)) + // Is this a stock library? There are a few special conditions if so ... + if (file_exists(BASEPATH.'libraries/'.$subdir.$class.'.php')) { - $baseclass = BASEPATH.'libraries/'.$subdir.$class.'.php'; - - if ( ! file_exists($baseclass)) - { - log_message('error', 'Unable to load the requested class: '.$class); - show_error('Unable to load the requested class: '.$class); - } - - // Safety: Was the class already loaded by a previous call? - if (class_exists(config_item('subclass_prefix').$class, FALSE)) - { - // Before we deem this to be a duplicate request, let's see - // if a custom object name is being supplied. If so, we'll - // return a new instance of the object - if ($object_name !== NULL) - { - $CI =& get_instance(); - if ( ! isset($CI->$object_name)) - { - return $this->_ci_init_class($class, config_item('subclass_prefix'), $params, $object_name); - } - } - - log_message('debug', $class.' class already loaded. Second attempt ignored.'); - return; - } - - include_once($baseclass); - include_once($subclass); - - return $this->_ci_init_class($class, config_item('subclass_prefix'), $params, $object_name); + return $this->_ci_load_stock_library($class, $subdir, $params, $object_name); } // Let's search for the requested library file and load it. foreach ($this->_ci_library_paths as $path) { + // BASEPATH has already been checked for + if ($path === BASEPATH) + { + continue; + } + $filepath = $path.'libraries/'.$subdir.$class.'.php'; // Safety: Was the class already loaded by a previous call? @@ -1036,7 +1011,7 @@ class CI_Loader { $CI =& get_instance(); if ( ! isset($CI->$object_name)) { - return $this->_ci_init_class($class, '', $params, $object_name); + return $this->_ci_init_library($class, '', $params, $object_name); } } @@ -1050,13 +1025,13 @@ class CI_Loader { } include_once($filepath); - return $this->_ci_init_class($class, '', $params, $object_name); + return $this->_ci_init_library($class, '', $params, $object_name); } // One last attempt. Maybe the library is in a subdirectory, but it wasn't specified? if ($subdir === '') { - return $this->_ci_load_class($class.'/'.$class, $params, $object_name); + return $this->_ci_load_library($class.'/'.$class, $params, $object_name); } // If we got this far we were unable to find the requested class. @@ -1067,9 +1042,84 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Internal CI Class Instantiator + * Internal CI Stock Library Loader + * + * @used-by CI_Loader::_ci_load_library() + * @uses CI_Loader::_ci_init_library() + * + * @param string $library Library name to load + * @param string $file_path Path to the library filename, relative to libraries/ + * @param mixed $params Optional parameters to pass to the class constructor + * @param string $object_name Optional object name to assign to + * @return void + */ + protected function _ci_load_stock_library($library_name, $file_path, $params, $object_name) + { + $prefix = 'CI_'; + + if (class_exists($prefix.$library_name, FALSE)) + { + if (class_exists(config_item('subclass_prefix').$library_name, FALSE)) + { + $prefix = config_item('subclass_prefix'); + } + + // Before we deem this to be a duplicate request, let's see + // if a custom object name is being supplied. If so, we'll + // return a new instance of the object + if ($object_name !== NULL) + { + $CI =& get_instance(); + if ( ! isset($CI->$object_name)) + { + return $this->_ci_init_library($library_name, $prefix, $params, $object_name); + } + } + + log_message('debug', $library_name.' class already loaded. Second attempt ignored.'); + return; + } + elseif (file_exists(APPPATH.'libraries/'.$file_path.$library_name.'.php')) + { + // Override + include_once(APPPATH.'libraries/'.$file_path.$library_name.'.php'); + if (class_exists($prefix.$library_name, FALSE)) + { + return $this->_ci_init_library($library_name, $prefix, $params, $object_name); + } + else + { + log_message('debug', APPPATH.'libraries/'.$file_path.$library_name.'.php exists, but does not declare '.$prefix.$library_name); + } + } + + include_once(BASEPATH.'libraries/'.$file_path.$library_name.'.php'); + + // Check for extensions + $subclass = config_item('subclass_prefix').$library_name; + if (file_exists(APPPATH.'libraries/'.$file_path.$subclass.'.php')) + { + include_once(APPPATH.'libraries/'.$file_path.$subclass.'.php'); + if (class_exists($subclass, FALSE)) + { + $prefix = config_item('subclass_prefix'); + } + else + { + log_message('debug', APPPATH.'libraries/'.$file_path.$subclass.'.php exists, but does not declare '.$subclass); + } + } + + return $this->_ci_init_library($library_name, $prefix, $params, $object_name); + } + + // -------------------------------------------------------------------- + + /** + * Internal CI Library Instantiator * - * @used-by CI_Loader::_ci_load_class() + * @used-by CI_Loader::_ci_load_stock_library() + * @used-by CI_Loader::_ci_load_library() * * @param string $class Class name * @param string $prefix Class name prefix @@ -1080,7 +1130,7 @@ class CI_Loader { * @param string $object_name Optional object name to assign to * @return void */ - protected function _ci_init_class($class, $prefix = '', $config = FALSE, $object_name = NULL) + protected function _ci_init_library($class, $prefix, $config = FALSE, $object_name = NULL) { // Is there an associated config file for this class? Note: these should always be lowercase if ($config === NULL) @@ -1128,31 +1178,13 @@ class CI_Loader { } } - if ($prefix === '') - { - if (class_exists('CI_'.$class, FALSE)) - { - $name = 'CI_'.$class; - } - elseif (class_exists(config_item('subclass_prefix').$class, FALSE)) - { - $name = config_item('subclass_prefix').$class; - } - else - { - $name = $class; - } - } - else - { - $name = $prefix.$class; - } + $class_name = $prefix.$class; // Is the class name valid? - if ( ! class_exists($name, FALSE)) + if ( ! class_exists($class_name, FALSE)) { - log_message('error', 'Non-existent class: '.$name); - show_error('Non-existent class: '.$name); + log_message('error', 'Non-existent class: '.$class_name); + show_error('Non-existent class: '.$class_name); } // Set the variable name we will assign the class to @@ -1170,13 +1202,13 @@ class CI_Loader { $CI =& get_instance(); if (isset($CI->$object_name)) { - if ($CI->$object_name instanceof $name) + if ($CI->$object_name instanceof $class_name) { - log_message('debug', $class." has already been instantiated as '".$object_name."'. Second attempt aborted."); + log_message('debug', $class_name." has already been instantiated as '".$object_name."'. Second attempt aborted."); return; } - show_error("Resource '".$object_name."' already exists and is not a ".$class." instance."); + show_error("Resource '".$object_name."' already exists and is not a ".$class_name." instance."); } // Save the class name and object name @@ -1184,8 +1216,8 @@ class CI_Loader { // Instantiate the class $CI->$object_name = isset($config) - ? new $name($config) - : new $name(); + ? new $class_name($config) + : new $class_name(); } // -------------------------------------------------------------------- |