Add attribute starter notes

v2/ansible/__init__.py

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+# TODO: header

v2/ansible/playbook/attribute.py

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+# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+#from ansible.common.errors import AnsibleError
+
+class MyMeta(type):
+
+    def __call__(self, *args, **kwargs):
+
+         obj = type.__call__(self, *args)
+         for name, value in kwargs.items():
+             setattr(obj, name, value)
+         return obj
+
+class Attribute(object):
+
+    __metaclass__ = MyMeta
+
+    def load(self, data, base_object):
+        ''' the loader is called to store the attribute from a datastructure when key names match.  The default is very basic '''
+        self._validate(base_object, data)
+        setattr(base_object, self.name,  data)
+
+    def _validate(self, data, base_object):
+        ''' validate is called after loading an object data structure to massage any input or raise errors on any incompatibilities '''
+        if self.validator:
+           self.validator(base_object)
+
+    def post_validate(self, base_object):
+        ''' post validate is called after templating the context of a Task (usually in Runner) to validate the types of arguments '''
+        if self.post_validator:
+           self.post_validator(base_object)
+
+class FieldAttribute(Attribute):
+    
+    __metaclass__ = MyMeta
+    pass
+