public static boolean needsPackageAccessCheck ( ClassLoader from , ClassLoader to ) { if ( from == null || from == to ) return false ; if ( to == null ) return true ; return ! isAncestor ( from , to ) ; }
Returns true if package access check is needed for reflective access from a class loader from to classes or members in a class defined by class loader to . This method returns true if from is not the same as or an ancestor of to . All code in a system domain are granted with all permission and so this method returns false if from class loader is a class loader loading system classes . On the other hand if a class loader attempts to access system domain classes it requires package access check and this method will return true .