[+] Project : adding Features detachables in order to improve performance

// clean code

git-svn-id: http://dev.prestashop.com/svn/v1/branches/1.5.x@8328 b9a71923-0436-4b27-9f14-aed3839534dd

classes/Combination.php

@@ -158,7 +158,7 @@ class CombinationCore extends ObjectModel
 		FROM `'._DB_PREFIX_.'product_attribute_image`
 		WHERE `id_product_attribute` = '.(int)($this->id).'
 		');
-}
+	}
 
 	public function setWsImages($values)
 	{
@@ -175,6 +175,29 @@ class CombinationCore extends ObjectModel
 		);
 		return true;
 	}
+	
+	/**
+	 * This method is allow to know if a feature is active
+	 * @since 1.5.0.1
+	 * @return bool
+	 */
+	public static function isFeatureActive()
+	{
+		return Configuration::get('PS_COMBINATION_FEATURE_ACTIVE');
+	}
+	
+	/**
+	 * This method is allow to know if a feature is in use
+	 * @since 1.5.0.1
+	 * @return bool
+	 */
+	public static function isActuallyUsed()
+	{
+		return (bool)Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue('
+			SELECT COUNT(*)
+			FROM `ps_product_attribute`
+		');
+	}
 }