1 files changed, 70 insertions, 0 deletions
diff --git a/azure/aria/aria-extension-cloudify/src/aria/aria/parser/presentation/presenter.py b/azure/aria/aria-extension-cloudify/src/aria/aria/parser/presentation/presenter.py
new file mode 100644
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+++ b/azure/aria/aria-extension-cloudify/src/aria/aria/parser/presentation/presenter.py
@@ -0,0 +1,70 @@
+# 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 ...utils.collections import merge
+from ...utils.formatting import safe_repr
+from ..validation import Issue
+from .presentation import Presentation
+
+
+class Presenter(Presentation):
+    """
+    Base class for ARIA presenters.
+
+    Presenters provide a robust API over agnostic raw data.
+    """
+
+    DSL_VERSIONS = None
+    ALLOWED_IMPORTED_DSL_VERSIONS = None
+
+    @classmethod
+    def can_present(cls, raw):
+        dsl = raw.get('tosca_definitions_version')
+        assert cls.DSL_VERSIONS
+        return dsl in cls.DSL_VERSIONS
+
+    def _validate_import(self, context, presentation):
+        tosca_definitions_version = presentation.service_template.tosca_definitions_version
+        assert self.ALLOWED_IMPORTED_DSL_VERSIONS
+        if tosca_definitions_version is not None \
+                and tosca_definitions_version not in self.__class__.ALLOWED_IMPORTED_DSL_VERSIONS:
+            context.validation.report(
+                'import "tosca_definitions_version" is not one of %s: %s'
+                % (' or '.join([safe_repr(v)
+                                for v in self.__class__.ALLOWED_IMPORTED_DSL_VERSIONS]),
+                   presentation.service_template.tosca_definitions_version),
+                locator=presentation._get_child_locator('inputs'),
+                level=Issue.BETWEEN_TYPES)
+            return False
+        return True
+
+    def _merge_import(self, presentation):
+        merge(self._raw, presentation._raw)
+        if hasattr(self._raw, '_locator') and hasattr(presentation._raw, '_locator'):
+            self._raw._locator.merge(presentation._raw._locator)
+
+    def _link_locators(self):
+        if hasattr(self._raw, '_locator'):
+            locator = self._raw._locator
+            delattr(self._raw, '_locator')
+            locator.link(self._raw)
+
+    @staticmethod
+    def _get_import_locations(context):
+        raise NotImplementedError
+
+    @staticmethod
+    def _get_deployment_template(context):
+        raise NotImplementedError