/**
* When part of the class autoloader stack, this method will dynamically try to located the proper class file and include it if the class is instantiated without already existing.
*
* @throws MpmClassUndefinedException
*
* @uses MPM_PATH
* @uses MpmStringHelper::camelToLower()
*
* @param string $class_name the name of the class being instantiated
*
* @return void
*/
public static function load($class_name)
{
// already loaded, don't need this method
if (class_exists($class_name, false) || interface_exists($class_name, false)) {
return;
}
// where do we store the classes?
$class_path = MPM_PATH . '/lib';
// class name is coming to us in camel caps with (possibly) an Mpm prefix... remove prefix and turn into lowercase string with underscores
$filename = MpmStringHelper::camelToLower($class_name);
if (substr($filename, 0, 4) == 'mpm_') {
$filename = substr($filename, 4, strlen($filename));
}
$filename .= '.php';
// is it in the class path?
if (file_exists($class_path . '/' . $filename)) {
require_once $class_path . '/' . $filename;
} else {
if (file_exists(MPM_PATH . '/config/' . $filename)) {
require_once MPM_PATH . '/config/' . $filename;
} else {
$dir = dir($class_path);
while (false != ($file = $dir->read())) {
if ($file != '..' && $file != '.' && is_dir($class_path . '/' . $file)) {
if (file_exists($class_path . '/' . $file . '/' . $filename)) {
require_once $class_path . '/' . $file . '/' . $filename;
}
}
}
}
}
// make sure we've included the class
if (false === class_exists($class_name, false)) {
if (false === interface_exists($class_name, false)) {
throw new MpmClassUndefinedException('Class or interface "' . $class_name . '" does not exist.', E_USER_ERROR);
}
}
return;
}
