vFW and vDNS support added to azure-plugin

[multicloud/azure.git] / azure / aria / aria-extension-cloudify / src / aria / aria / parser / loading / source.py

diff --git a/azure/aria/aria-extension-cloudify/src/aria/aria/parser/loading/source.py b/azure/aria/aria-extension-cloudify/src/aria/aria/parser/loading/source.py
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+++ b/azure/aria/aria-extension-cloudify/src/aria/aria/parser/loading/source.py
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+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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 .location import LiteralLocation, UriLocation
+from .literal import LiteralLoader
+from .uri import UriTextLoader
+
+
+class LoaderSource(object):
+    """
+    Base class for ARIA loader sources.
+
+    Loader sources provide appropriate :class:`Loader` instances for locations.
+    """
+
+    def get_loader(self, context, location, origin_location):
+        raise NotImplementedError
+
+
+class DefaultLoaderSource(LoaderSource):
+    """
+    The default ARIA loader source will generate a :class:`UriTextLoader` for
+    :class:`UriLocation` and a :class:`LiteralLoader` for a :class:`LiteralLocation`.
+    """
+
+    def get_loader(self, context, location, origin_location):
+        if isinstance(location, UriLocation):
+            return UriTextLoader(context, location, origin_location)
+        elif isinstance(location, LiteralLocation):
+            return LiteralLoader(location)
+
+        return super(DefaultLoaderSource, self).get_loader(context, location, origin_location)