changed pattern to singleton

ClassAutoloader.class.php

@@ -6,12 +6,14 @@
 /**
  * Autoload needed classes
  * @author etessore
- * @version 1.0.1
+ * @version 1.0.2
  * @package classes
  */
 
 /* 
  * Changelog:
+ * 1.0.2
+ * 	rewrited as singleton
  * 1.0.1
  * 	support multiple search path to allow children theme to extend classes
  * 1.0.0
@@ -20,6 +22,8 @@
 class ClassAutoloader {
 	const WORDPRESS_THEME_UTILS_CLASS_DIR = 'classes';
 
+	private static $instance = null;
+
 	/**
 	 * @var array stores the path the system will scan for files
 	 */
@@ -28,7 +32,7 @@ class ClassAutoloader {
 	/**
 	 * Initializes the autoloader
 	 */
-	public function __construct() {
+	private function __construct() {
 		$this
 			// First search in the child theme dir
 			->add_loading_template(
@@ -45,6 +49,17 @@ public function __construct() {
 			->register_autoload();
 	}
 
+	/**
+	 * Retrieves the singleton instance
+	 * @return ClassAutoloader
+	 */
+	public static function get_instance(){
+		if(is_null(self::$instance)){
+			self::$instance = new self;
+		}
+		return self::$instance;
+	}
+
 	/**
 	 * Set the loading template
 	 * @param string $tpl the template

ThemeUtils.class.php

@@ -55,7 +55,7 @@ public static function get_instance(){
 	 */
 	public static function enable_autoload_system(){
 		include_once WORDPRESS_THEME_UTILS_PATH . WORDPRESS_THEME_UTILS_AUTOLOADER_RELATIVE_PATH;
-		new ClassAutoloader();
+		ClassAutoloader::get_instance();
 	}
 
 	/**