1 files changed, 42 insertions, 0 deletions
diff --git a/django/utils/module_tools/data_storage.py b/django/utils/module_tools/data_storage.py
new file mode 100644
index 0000000000..aed5980e6b
--- /dev/null
+++ b/django/utils/module_tools/data_storage.py
@@ -0,0 +1,42 @@
+"""
+Copyright 2009 55 Minutes (http://www.55minutes.com)
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+"""
+
+__all__ = ('Packages', 'Modules', 'Excluded', 'Errors')
+
+class SingletonType(type):
+    def __call__(cls, *args, **kwargs):
+        if getattr(cls, '__instance__', None) is None:
+            instance = cls.__new__(cls)
+            instance.__init__(*args, **kwargs)
+            cls.__instance__ = instance
+        return cls.__instance__
+
+class Packages(object):
+    __metaclass__ = SingletonType
+    packages = {}
+
+class Modules(object):
+    __metaclass__ = SingletonType
+    modules = {}
+
+class Excluded(object):
+    __metaclass__ = SingletonType
+    excluded = []
+
+class Errors(object):
+    __metaclass__ = SingletonType
+    errors = []
+