Problems/Motivations
The lib/Drupal// convention is not suitable for everything, so the programmer has the option to change himself the namespace of its registered classes. This is easily done by the following snippet:
<?php
$loader = drupal_classloader();
$loader->registerNamespace('MyFancyNamespace', DRUPAL_ROOT . '/'. drupal_get_path('module', 'myfancymodule') . '/lib');
?>This is pure glue code which is not fun to write and maintain, we could make it sexier, by allowing programmer to specify its namespace directly within the .info file.
Moreover, if you change all your modules namespace, it feels we are adding execution time because the original routine for registering namespace depends on module_list(). We can improve it.
Proposed resolution
Writing the namespace as following in the module's .info file:
name = My fancy module
description = My fancy description
namespace[] = MyFancyNamespace
namespace[] = MySecondComponentNamespace
namespace[] = ...This make sense because we don't have to allocate a hook_init() for defining new classes. We can also re-factor the registering routing so that it register only the namespace needed and not the list of enabled modules, plus the custom namespaces which will overwrite default defined namespaces.