<?php
/*
+--------------------------------------------------------------------+
| CiviCRM version 4.4 |
+--------------------------------------------------------------------+
| Copyright CiviCRM LLC (c) 2004-2013 |
+--------------------------------------------------------------------+
| This file is a part of CiviCRM. |
| |
| CiviCRM is free software; you can copy, modify, and distribute it |
| under the terms of the GNU Affero General Public License |
| Version 3, 19 November 2007 and the CiviCRM Licensing Exception. |
| |
| CiviCRM is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| See the GNU Affero General Public License for more details. |
| |
| You should have received a copy of the GNU Affero General Public |
| License and the CiviCRM Licensing Exception along |
| with this program; if not, contact CiviCRM LLC |
| at info[AT]civicrm[DOT]org. If you have questions about the |
| GNU Affero General Public License or the licensing of CiviCRM, |
| see the CiviCRM license FAQ at http://civicrm.org/licensing |
+--------------------------------------------------------------------+
*/
/**
*
*
* @package CRM
* @copyright CiviCRM LLC (c) 2004-2013
* $Id$
*
*/
class CRM_Core_ClassLoader {
/**
* We only need one instance of this object. So we use the singleton
* pattern and cache the instance in this variable
* @var object
* @static
*/
private static $_singleton = NULL;
static function &singleton($force = FALSE) {
if ($force || self::$_singleton === NULL) {
self::$_singleton = new CRM_Core_ClassLoader();
}
return self::$_singleton;
}
/**
* @var bool TRUE if previously registered
*/
protected $_registered;
protected function __construct() {
$this->_registered = FALSE;
}
/**
* Registers this instance as an autoloader.
*
* @param Boolean $prepend Whether to prepend the autoloader or not
*
* @api
*/
function register($prepend = FALSE) {
if ($this->_registered) {
return;
}
// we do this to prevent a autoloader errors with joomla / 3rd party packages
// use absolute path since we dont know the content of include_path as yet
// CRM-11304
// since HTML Purifier could potentially be loaded / used by other modules / components
// lets check it its already loaded
// we also check if the bootstrap file exists since during install of a drupal distro profile
// the files might not exists, in which case we skip loading the file
// if you change the below, please test on Joomla and also PCP pages
$includeHTMLPurifier = TRUE;
$htmlPurifierPath = dirname(__FILE__) . '/../../packages/IDS/vendors/htmlpurifier/HTMLPurifier/Bootstrap.php';
if (
class_exists('HTMLPurifier_Bootstrap') ||
!file_exists($htmlPurifierPath)
) {
$includeHTMLPurifier = FALSE;
}
else {
require_once $htmlPurifierPath;
}
if (version_compare(PHP_VERSION, '5.3.0') >= 0) {
spl_autoload_register(array($this, 'loadClass'), TRUE, $prepend);
if ($includeHTMLPurifier) {
spl_autoload_register(array('HTMLPurifier_Bootstrap', 'autoload'), TRUE, $prepend);
}
}
else {
// http://www.php.net/manual/de/function.spl-autoload-register.php#107362
// "when specifying the third parameter (prepend), the function will fail badly in PHP 5.2"
spl_autoload_register(array($this, 'loadClass'), TRUE);
if ($includeHTMLPurifier) {
spl_autoload_register(array('HTMLPurifier_Bootstrap', 'autoload'), TRUE);
}
}
$this->_registered = TRUE;
}
function loadClass($class) {
if (
// Only load classes that clearly belong to CiviCRM.
0 === strncmp($class, 'CRM_', 4) &&
// Do not load PHP 5.3 namespaced classes.
// (in a future version, maybe)
FALSE === strpos($class, '\\')
) {
$file = strtr($class, '_', '/') . '.php';
// There is some question about the best way to do this.
// "require_once" is nice because it's simple and throws
// intelligible errors. The down side is that autoloaders
// down the chain cannot try to find the file if we fail.
require_once ($file);
}
}
}
