search performances: refactoring

library/Class/Notice/Facette.php

@@ -67,14 +67,7 @@ class Class_Notice_Facette {
 
 
   protected function getGroupCodeFromKey() {
-    return $this->isThesaurus() ?
-      Class_CodifThesaurus::getFacetGroup($this->_cle) :
-      $this->_cle[0];
-  }
-
-
-  public function isThesaurus() {
-    return Class_CodifThesaurus::CODE_FACETTE == $this->_cle[0];
+    return static::extractCodeRubrique($this->_cle);
   }