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diff --git a/azure/aria/aria-extension-cloudify/src/aria/aria/modeling/utils.py b/azure/aria/aria-extension-cloudify/src/aria/aria/modeling/utils.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.
+
+"""
+Miscellaneous modeling utilities.
+"""
+
+import os
+from json import JSONEncoder
+from StringIO import StringIO
+
+from . import exceptions
+from ..utils.type import validate_value_type
+from ..utils.collections import OrderedDict
+from ..utils.formatting import string_list_as_string
+
+
+class ModelJSONEncoder(JSONEncoder):
+    """
+    JSON encoder that automatically unwraps ``value`` attributes.
+    """
+    def __init__(self, *args, **kwargs):
+        # Just here to make sure Sphinx doesn't grab the base constructor's docstring
+        super(ModelJSONEncoder, self).__init__(*args, **kwargs)
+
+    def default(self, o):  # pylint: disable=method-hidden
+        from .mixins import ModelMixin
+        if isinstance(o, ModelMixin):
+            if hasattr(o, 'value'):
+                dict_to_return = o.to_dict(fields=('value',))
+                return dict_to_return['value']
+            else:
+                return o.to_dict()
+        else:
+            return JSONEncoder.default(self, o)
+
+
+class NodeTemplateContainerHolder(object):
+    """
+    Wrapper that allows using a :class:`~aria.modeling.models.NodeTemplate` model directly as the
+    ``container_holder`` input for :func:`~aria.modeling.functions.evaluate`.
+    """
+
+    def __init__(self, node_template):
+        self.container = node_template
+        self.service = None
+
+    @property
+    def service_template(self):
+        return self.container.service_template
+
+
+# def validate_no_undeclared_inputs(declared_inputs, supplied_inputs):
+#
+#     undeclared_inputs = [input for input in supplied_inputs if input not in declared_inputs]
+#     if undeclared_inputs:
+#         raise exceptions.UndeclaredInputsException(
+#             'Undeclared inputs have been provided: {0}; Declared inputs: {1}'
+#             .format(string_list_as_string(undeclared_inputs),
+#                     string_list_as_string(declared_inputs.keys())))
+
+
+def validate_required_inputs_are_supplied(declared_inputs, supplied_inputs):
+    required_inputs = [input for input in declared_inputs.values() if input.required]
+    missing_required_inputs = [input for input in required_inputs
+                               if input.name not in supplied_inputs and not str(input.value)]
+    if missing_required_inputs:
+        raise exceptions.MissingRequiredInputsException(
+            'Required inputs {0} have not been provided values'
+            .format(string_list_as_string(missing_required_inputs)))
+
+
+def merge_parameter_values(provided_values, declared_parameters, model_cls=None):
+    """
+    Merges parameter values according to those declared by a type.
+
+    Exceptions will be raised for validation errors.
+
+    :param provided_values: provided parameter values or None
+    :type provided_values: {:obj:`basestring`: object}
+    :param declared_parameters: declared parameters
+    :type declared_parameters: {:obj:`basestring`: :class:`~aria.modeling.models.Parameter`}
+    :param model_cls: the model class that should be created from a provided value
+    :type model_cls: :class:`~aria.modeling.models.Input` or :class:`~aria.modeling.models.Argument`
+    :return: the merged parameters
+    :rtype: {:obj:`basestring`: :class:`~aria.modeling.models.Parameter`}
+    :raises ~aria.modeling.exceptions.UndeclaredInputsException: if a key in
+     ``parameter_values`` does not exist in ``declared_parameters``
+    :raises ~aria.modeling.exceptions.MissingRequiredInputsException: if a key in
+     ``declared_parameters`` does not exist in ``parameter_values`` and also has no default value
+    :raises ~aria.modeling.exceptions.ParametersOfWrongTypeException: if a value in
+      ``parameter_values`` does not match its type in ``declared_parameters``
+    """
+
+    provided_values = provided_values or {}
+    provided_values_of_wrong_type = OrderedDict()
+    model_parameters = OrderedDict()
+    model_cls = model_cls or _get_class_from_sql_relationship(declared_parameters)
+
+    for declared_parameter_name, declared_parameter in declared_parameters.iteritems():
+        if declared_parameter_name in provided_values:
+            # a value has been provided
+            value = provided_values[declared_parameter_name]
+
+            # Validate type
+            type_name = declared_parameter.type_name
+            try:
+                validate_value_type(value, type_name)
+            except ValueError:
+                provided_values_of_wrong_type[declared_parameter_name] = type_name
+            except RuntimeError:
+                # TODO This error shouldn't be raised (or caught), but right now we lack support
+                # for custom data_types, which will raise this error. Skipping their validation.
+                pass
+            model_parameters[declared_parameter_name] = model_cls(                                  # pylint: disable=unexpected-keyword-arg
+                name=declared_parameter_name,
+                type_name=type_name,
+                description=declared_parameter.description,
+                value=value)
+        else:
+            # Copy default value from declaration
+            model_parameters[declared_parameter_name] = model_cls(
+                value=declared_parameter._value,
+                name=declared_parameter.name,
+                type_name=declared_parameter.type_name,
+                description=declared_parameter.description)
+
+    if provided_values_of_wrong_type:
+        error_message = StringIO()
+        for param_name, param_type in provided_values_of_wrong_type.iteritems():
+            error_message.write('Parameter "{0}" is not of declared type "{1}"{2}'
+                                .format(param_name, param_type, os.linesep))
+        raise exceptions.ParametersOfWrongTypeException(error_message.getvalue())
+
+    return model_parameters
+
+
+def parameters_as_values(the_dict):
+    return dict((k, v.value) for k, v in the_dict.iteritems())
+
+
+def dict_as_arguments(the_dict):
+    return OrderedDict((name, value.as_argument()) for name, value in the_dict.iteritems())
+
+
+class classproperty(object):                                                                        # pylint: disable=invalid-name
+    def __init__(self, f):
+        self._func = f
+        self.__doct__ = f.__doc__
+
+    def __get__(self, instance, owner):
+        return self._func(owner)
+
+
+def fix_doc(cls):
+    """
+    Class decorator to use the last base class's docstring and make sure Sphinx doesn't grab the
+    base constructor's docstring.
+    """
+    original_init = cls.__init__
+    def init(*args, **kwargs):
+        original_init(*args, **kwargs)
+
+    cls.__init__ = init
+    cls.__doc__ = cls.__bases__[-1].__doc__
+
+    return cls
+
+
+def _get_class_from_sql_relationship(field):
+    class_ = field._sa_adapter.owner_state.class_
+    prop_name = field._sa_adapter.attr.key
+    return getattr(class_, prop_name).property.mapper.class_