1 files changed, 51 insertions, 0 deletions
diff --git a/nova/api/openstack/views/images.py b/nova/api/openstack/views/images.py
new file mode 100644
index 000000000..2369a8f9d
--- /dev/null
+++ b/nova/api/openstack/views/images.py
@@ -0,0 +1,51 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2010-2011 OpenStack LLC.
+# All Rights Reserved.
+#
+#    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.
+
+from nova.api.openstack import common
+
+
+def get_view_builder(req):
+    '''
+    A factory method that returns the correct builder based on the version of
+    the api requested.
+    '''
+    version = common.get_api_version(req)
+    base_url = req.application_url
+    if version == '1.1':
+        return ViewBuilder_1_1(base_url)
+    else:
+        return ViewBuilder_1_0()
+
+
+class ViewBuilder(object):
+    def __init__(self):
+        pass
+
+    def build(self, image_obj):
+        raise NotImplementedError()
+
+
+class ViewBuilder_1_1(ViewBuilder):
+    def __init__(self, base_url):
+        self.base_url = base_url
+
+    def generate_href(self, image_id):
+        return "%s/images/%s" % (self.base_url, image_id)
+
+
+class ViewBuilder_1_0(ViewBuilder):
+    pass