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From mxm...@apache.org
Subject [08/16] incubator-ariatosca git commit: ARIA-105 Integrate parser and orchestrator models
Date Thu, 23 Mar 2017 18:14:49 GMT
http://git-wip-us.apache.org/repos/asf/incubator-ariatosca/blob/9841ca4a/aria/parser/modeling/elements.py
----------------------------------------------------------------------
diff --git a/aria/parser/modeling/elements.py b/aria/parser/modeling/elements.py
deleted file mode 100644
index 62bc7b8..0000000
--- a/aria/parser/modeling/elements.py
+++ /dev/null
@@ -1,128 +0,0 @@
-# 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 StrictDict, OrderedDict
-from ...utils.console import puts
-from .utils import coerce_value
-
-
-class Function(object):
-    """
-    An intrinsic function.
-
-    Serves as a placeholder for a value that should eventually be derived
-    by calling the function.
-    """
-
-    @property
-    def as_raw(self):
-        raise NotImplementedError
-
-    def _evaluate(self, context, container):
-        raise NotImplementedError
-
-    def __deepcopy__(self, memo):
-        # Circumvent cloning in order to maintain our state
-        return self
-
-
-class Element(object):
-    """
-    Base class for :class:`ServiceInstance` elements.
-
-    All elements support validation, diagnostic dumping, and representation as
-    raw data (which can be translated into JSON or YAML) via :code:`as_raw`.
-    """
-
-    @property
-    def as_raw(self):
-        raise NotImplementedError
-
-    def validate(self, context):
-        pass
-
-    def coerce_values(self, context, container, report_issues):
-        pass
-
-    def dump(self, context):
-        pass
-
-
-class ModelElement(Element):
-    """
-    Base class for :class:`ServiceModel` elements.
-
-    All model elements can be instantiated into :class:`ServiceInstance` elements.
-    """
-
-    def instantiate(self, context, container):
-        raise NotImplementedError
-
-
-class Parameter(ModelElement):
-    """
-    Represents a typed value.
-
-    This class is used by both service model and service instance elements.
-    """
-
-    def __init__(self, type_name, value, description):
-        self.type_name = type_name
-        self.value = value
-        self.description = description
-
-    @property
-    def as_raw(self):
-        return OrderedDict((
-            ('type_name', self.type_name),
-            ('value', self.value),
-            ('description', self.description)))
-
-    def instantiate(self, context, container):
-        return Parameter(self.type_name, self.value, self.description)
-
-    def coerce_values(self, context, container, report_issues):
-        if self.value is not None:
-            self.value = coerce_value(context, container, self.value, report_issues)
-
-
-class Metadata(ModelElement):
-    """
-    Custom values associated with the deployment template and its plans.
-
-    This class is used by both service model and service instance elements.
-
-    Properties:
-
-    * :code:`values`: Dict of custom values
-    """
-
-    def __init__(self):
-        self.values = StrictDict(key_class=basestring)
-
-    @property
-    def as_raw(self):
-        return self.values
-
-    def instantiate(self, context, container):
-        metadata = Metadata()
-        metadata.values.update(self.values)
-        return metadata
-
-    def dump(self, context):
-        puts('Metadata:')
-        with context.style.indent:
-            for name, value in self.values.iteritems():
-                puts('%s: %s' % (name, context.style.meta(value)))

http://git-wip-us.apache.org/repos/asf/incubator-ariatosca/blob/9841ca4a/aria/parser/modeling/exceptions.py
----------------------------------------------------------------------
diff --git a/aria/parser/modeling/exceptions.py b/aria/parser/modeling/exceptions.py
deleted file mode 100644
index c7f08df..0000000
--- a/aria/parser/modeling/exceptions.py
+++ /dev/null
@@ -1,22 +0,0 @@
-# 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 ...exceptions import AriaException
-
-
-class CannotEvaluateFunctionException(AriaException):
-    """
-    ARIA modeling exception: cannot evaluate the function at this time.
-    """

http://git-wip-us.apache.org/repos/asf/incubator-ariatosca/blob/9841ca4a/aria/parser/modeling/instance_elements.py
----------------------------------------------------------------------
diff --git a/aria/parser/modeling/instance_elements.py b/aria/parser/modeling/instance_elements.py
deleted file mode 100644
index 8310d62..0000000
--- a/aria/parser/modeling/instance_elements.py
+++ /dev/null
@@ -1,1041 +0,0 @@
-# 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 StrictList, StrictDict, FrozenList, OrderedDict
-from ...utils.formatting import as_raw, as_raw_list, as_raw_dict, as_agnostic, safe_repr
-from ...utils.console import puts, indent
-from ..validation import Issue
-from .elements import Element, Parameter
-from .utils import (validate_dict_values, validate_list_values, coerce_dict_values,
-                    coerce_list_values, dump_list_values, dump_dict_values, dump_parameters,
-                    dump_interfaces)
-
-
-class ServiceInstance(Element):
-    """
-    A service instance is an instance of a :class:`ServiceModel`.
-
-    You will usually not create it programmatically, but instead instantiate
-    it from the model.
-
-    Properties:
-
-    * :code:`description`: Human-readable description
-    * :code:`metadata`: :class:`Metadata`
-    * :code:`nodes`: Dict of :class:`Node`
-    * :code:`groups`: Dict of :class:`Group`
-    * :code:`policies`: Dict of :class:`Policy`
-    * :code:`substitution`: :class:`Substitution`
-    * :code:`inputs`: Dict of :class:`Parameter`
-    * :code:`outputs`: Dict of :class:`Parameter`
-    * :code:`operations`: Dict of :class:`Operation`
-    """
-
-    def __init__(self):
-        self.description = None
-        self.metadata = None
-        self.nodes = StrictDict(key_class=basestring, value_class=Node)
-        self.groups = StrictDict(key_class=basestring, value_class=Group)
-        self.policies = StrictDict(key_class=basestring, value_class=Policy)
-        self.substitution = None
-        self.inputs = StrictDict(key_class=basestring, value_class=Parameter)
-        self.outputs = StrictDict(key_class=basestring, value_class=Parameter)
-        self.operations = StrictDict(key_class=basestring, value_class=Operation)
-
-    def satisfy_requirements(self, context):
-        satisfied = True
-        for node in self.nodes.itervalues():
-            if not node.satisfy_requirements(context):
-                satisfied = False
-        return satisfied
-
-    def validate_capabilities(self, context):
-        satisfied = True
-        for node in self.nodes.itervalues():
-            if not node.validate_capabilities(context):
-                satisfied = False
-        return satisfied
-
-    def find_nodes(self, node_template_name):
-        nodes = []
-        for node in self.nodes.itervalues():
-            if node.template_name == node_template_name:
-                nodes.append(node)
-        return FrozenList(nodes)
-
-    def get_node_ids(self, node_template_name):
-        return FrozenList((node.id for node in self.find_nodes(node_template_name)))
-
-    def find_groups(self, group_template_name):
-        groups = []
-        for group in self.groups.itervalues():
-            if group.template_name == group_template_name:
-                groups.append(group)
-        return FrozenList(groups)
-
-    def get_group_ids(self, group_template_name):
-        return FrozenList((group.id for group in self.find_groups(group_template_name)))
-
-    def is_node_a_target(self, context, target_node):
-        for node in self.nodes.itervalues():
-            if self._is_node_a_target(context, node, target_node):
-                return True
-        return False
-
-    def _is_node_a_target(self, context, source_node, target_node):
-        if source_node.relationships:
-            for relationship in source_node.relationships:
-                if relationship.target_node_id == target_node.id:
-                    return True
-                else:
-                    node = context.modeling.instance.nodes.get(relationship.target_node_id)
-                    if node is not None:
-                        if self._is_node_a_target(context, node, target_node):
-                            return True
-        return False
-
-    @property
-    def as_raw(self):
-        return OrderedDict((
-            ('description', self.description),
-            ('metadata', as_raw(self.metadata)),
-            ('nodes', as_raw_list(self.nodes)),
-            ('groups', as_raw_list(self.groups)),
-            ('policies', as_raw_list(self.policies)),
-            ('substitution', as_raw(self.substitution)),
-            ('inputs', as_raw_dict(self.inputs)),
-            ('outputs', as_raw_dict(self.outputs)),
-            ('operations', as_raw_list(self.operations))))
-
-    def validate(self, context):
-        if self.metadata is not None:
-            self.metadata.validate(context)
-        validate_dict_values(context, self.nodes)
-        validate_dict_values(context, self.groups)
-        validate_dict_values(context, self.policies)
-        if self.substitution is not None:
-            self.substitution.validate(context)
-        validate_dict_values(context, self.inputs)
-        validate_dict_values(context, self.outputs)
-        validate_dict_values(context, self.operations)
-
-    def coerce_values(self, context, container, report_issues):
-        if self.metadata is not None:
-            self.metadata.coerce_values(context, container, report_issues)
-        coerce_dict_values(context, container, self.nodes, report_issues)
-        coerce_dict_values(context, container, self.groups, report_issues)
-        coerce_dict_values(context, container, self.policies, report_issues)
-        if self.substitution is not None:
-            self.substitution.coerce_values(context, container, report_issues)
-        coerce_dict_values(context, container, self.inputs, report_issues)
-        coerce_dict_values(context, container, self.outputs, report_issues)
-        coerce_dict_values(context, container, self.operations, report_issues)
-
-    def dump(self, context):
-        if self.description is not None:
-            puts(context.style.meta(self.description))
-        if self.metadata is not None:
-            self.metadata.dump(context)
-        for node in self.nodes.itervalues():
-            node.dump(context)
-        for group in self.groups.itervalues():
-            group.dump(context)
-        for policy in self.policies.itervalues():
-            policy.dump(context)
-        if self.substitution is not None:
-            self.substitution.dump(context)
-        dump_parameters(context, self.inputs, 'Inputs')
-        dump_parameters(context, self.outputs, 'Outputs')
-        dump_dict_values(context, self.operations, 'Operations')
-
-    def dump_graph(self, context):
-        for node in self.nodes.itervalues():
-            if not self.is_node_a_target(context, node):
-                self._dump_graph_node(context, node)
-
-    def _dump_graph_node(self, context, node):
-        puts(context.style.node(node.id))
-        if node.relationships:
-            with context.style.indent:
-                for relationship in node.relationships:
-                    relationship_name = (context.style.node(relationship.template_name)
-                                         if relationship.template_name is not None
-                                         else context.style.type(relationship.type_name))
-                    capability_name = (context.style.node(relationship.target_capability_name)
-                                       if relationship.target_capability_name is not None
-                                       else None)
-                    if capability_name is not None:
-                        puts('-> %s %s' % (relationship_name, capability_name))
-                    else:
-                        puts('-> %s' % relationship_name)
-                    target_node = self.nodes.get(relationship.target_node_id)
-                    with indent(3):
-                        self._dump_graph_node(context, target_node)
-
-
-class Node(Element):
-    """
-    An instance of a :class:`NodeTemplate`.
-
-    Nodes may have zero or more :class:`Relationship` instances to other nodes.
-
-    Properties:
-
-    * :code:`id`: Unique ID (prefixed with the template name)
-    * :code:`type_name`: Must be represented in the :class:`ModelingContext`
-    * :code:`template_name`: Must be represented in the :class:`ServiceModel`
-    * :code:`properties`: Dict of :class:`Parameter`
-    * :code:`interfaces`: Dict of :class:`Interface`
-    * :code:`artifacts`: Dict of :class:`Artifact`
-    * :code:`capabilities`: Dict of :class:`CapabilityTemplate`
-    * :code:`relationship`: List of :class:`Relationship`
-    """
-
-    def __init__(self, context, type_name, template_name):
-        if not isinstance(type_name, basestring):
-            raise ValueError('must set type_name (string)')
-        if not isinstance(template_name, basestring):
-            raise ValueError('must set template_name (string)')
-
-        self.id = '%s_%s' % (template_name, context.modeling.generate_id())
-        self.type_name = type_name
-        self.template_name = template_name
-        self.properties = StrictDict(key_class=basestring, value_class=Parameter)
-        self.interfaces = StrictDict(key_class=basestring, value_class=Interface)
-        self.artifacts = StrictDict(key_class=basestring, value_class=Artifact)
-        self.capabilities = StrictDict(key_class=basestring, value_class=Capability)
-        self.relationships = StrictList(value_class=Relationship)
-
-    def satisfy_requirements(self, context):
-        node_template = context.modeling.model.node_templates.get(self.template_name)
-        satisfied = True
-        for i in range(len(node_template.requirement_templates)):
-            requirement_template = node_template.requirement_templates[i]
-
-            # Find target template
-            target_node_template, target_node_capability = \
-                requirement_template.find_target(context, node_template)
-            if target_node_template is not None:
-                satisfied = self._satisfy_capability(context,
-                                                     target_node_capability,
-                                                     target_node_template,
-                                                     requirement_template,
-                                                     requirement_template_index=i)
-            else:
-                context.validation.report('requirement "%s" of node "%s" has no target node '
-                                          'template' % (requirement_template.name,
-                                                        self.id),
-                                          level=Issue.BETWEEN_INSTANCES)
-                satisfied = False
-        return satisfied
-
-    def _satisfy_capability(self, context, target_node_capability, target_node_template,
-                            requirement_template, requirement_template_index):
-        # Find target nodes
-        target_nodes = context.modeling.instance.find_nodes(target_node_template.name)
-        if target_nodes:
-            target_node = None
-            target_capability = None
-
-            if target_node_capability is not None:
-                # Relate to the first target node that has capacity
-                for node in target_nodes:
-                    target_capability = node.capabilities.get(target_node_capability.name)
-                    if target_capability.relate():
-                        target_node = node
-                        break
-            else:
-                # Use first target node
-                target_node = target_nodes[0]
-
-            if target_node is not None:
-                if requirement_template.relationship_template is not None:
-                    relationship = \
-                        requirement_template.relationship_template.instantiate(context, self)
-                else:
-                    relationship = Relationship()
-                relationship.name = requirement_template.name
-                relationship.source_requirement_index = requirement_template_index
-                relationship.target_node_id = target_node.id
-                if target_capability is not None:
-                    relationship.target_capability_name = target_capability.name
-                self.relationships.append(relationship)
-            else:
-                context.validation.report('requirement "%s" of node "%s" targets node '
-                                          'template "%s" but its instantiated nodes do not '
-                                          'have enough capacity'
-                                          % (requirement_template.name,
-                                             self.id,
-                                             target_node_template.name),
-                                          level=Issue.BETWEEN_INSTANCES)
-                return False
-        else:
-            context.validation.report('requirement "%s" of node "%s" targets node template '
-                                      '"%s" but it has no instantiated nodes'
-                                      % (requirement_template.name,
-                                         self.id,
-                                         target_node_template.name),
-                                      level=Issue.BETWEEN_INSTANCES)
-            return False
-
-
-    def validate_capabilities(self, context):
-        satisfied = False
-        for capability in self.capabilities.itervalues():
-            if not capability.has_enough_relationships:
-                context.validation.report('capability "%s" of node "%s" requires at least %d '
-                                          'relationships but has %d'
-                                          % (capability.name,
-                                             self.id,
-                                             capability.min_occurrences,
-                                             capability.occurrences),
-                                          level=Issue.BETWEEN_INSTANCES)
-                satisfied = False
-        return satisfied
-
-    @property
-    def as_raw(self):
-        return OrderedDict((
-            ('id', self.id),
-            ('type_name', self.type_name),
-            ('template_name', self.template_name),
-            ('properties', as_raw_dict(self.properties)),
-            ('interfaces', as_raw_list(self.interfaces)),
-            ('artifacts', as_raw_list(self.artifacts)),
-            ('capabilities', as_raw_list(self.capabilities)),
-            ('relationships', as_raw_list(self.relationships))))
-
-    def validate(self, context):
-        if len(self.id) > context.modeling.id_max_length:
-            context.validation.report('"%s" has an ID longer than the limit of %d characters: %d'
-                                      % (self.id,
-                                         context.modeling.id_max_length,
-                                         len(self.id)),
-                                      level=Issue.BETWEEN_INSTANCES)
-
-        # TODO: validate that node template is of type?
-
-        validate_dict_values(context, self.properties)
-        validate_dict_values(context, self.interfaces)
-        validate_dict_values(context, self.artifacts)
-        validate_dict_values(context, self.capabilities)
-        validate_list_values(context, self.relationships)
-
-    def coerce_values(self, context, container, report_issues):
-        coerce_dict_values(context, self, self.properties, report_issues)
-        coerce_dict_values(context, self, self.interfaces, report_issues)
-        coerce_dict_values(context, self, self.artifacts, report_issues)
-        coerce_dict_values(context, self, self.capabilities, report_issues)
-        coerce_list_values(context, self, self.relationships, report_issues)
-
-    def dump(self, context):
-        puts('Node: %s' % context.style.node(self.id))
-        with context.style.indent:
-            puts('Template: %s' % context.style.node(self.template_name))
-            puts('Type: %s' % context.style.type(self.type_name))
-            dump_parameters(context, self.properties)
-            dump_interfaces(context, self.interfaces)
-            dump_dict_values(context, self.artifacts, 'Artifacts')
-            dump_dict_values(context, self.capabilities, 'Capabilities')
-            dump_list_values(context, self.relationships, 'Relationships')
-
-
-class Capability(Element):
-    """
-    A capability of a :class:`Node`.
-
-    An instance of a :class:`CapabilityTemplate`.
-
-    Properties:
-
-    * :code:`name`: Name
-    * :code:`type_name`: Must be represented in the :class:`ModelingContext`
-    * :code:`min_occurrences`: Minimum number of requirement matches required
-    * :code:`max_occurrences`: Maximum number of requirement matches allowed
-    * :code:`properties`: Dict of :class:`Parameter`
-    """
-
-    def __init__(self, name, type_name):
-        if not isinstance(name, basestring):
-            raise ValueError('name must be a string or None')
-        if not isinstance(type_name, basestring):
-            raise ValueError('type_name must be a string or None')
-
-        self.name = name
-        self.type_name = type_name
-        self.properties = StrictDict(key_class=basestring, value_class=Parameter)
-
-        self.min_occurrences = None # optional
-        self.max_occurrences = None # optional
-        self.occurrences = 0
-
-    @property
-    def has_enough_relationships(self):
-        if self.min_occurrences is not None:
-            return self.occurrences >= self.min_occurrences
-        return True
-
-    def relate(self):
-        if self.max_occurrences is not None:
-            if self.occurrences == self.max_occurrences:
-                return False
-        self.occurrences += 1
-        return True
-
-    @property
-    def as_raw(self):
-        return OrderedDict((
-            ('name', self.name),
-            ('type_name', self.type_name),
-            ('properties', as_raw_dict(self.properties))))
-
-    def validate(self, context):
-        if context.modeling.capability_types.get_descendant(self.type_name) is None:
-            context.validation.report('capability "%s" has an unknown type: %s'
-                                      % (self.name,
-                                         safe_repr(self.type_name)),
-                                      level=Issue.BETWEEN_TYPES)
-
-        validate_dict_values(context, self.properties)
-
-    def coerce_values(self, context, container, report_issues):
-        coerce_dict_values(context, container, self.properties, report_issues)
-
-    def dump(self, context):
-        puts(context.style.node(self.name))
-        with context.style.indent:
-            puts('Type: %s' % context.style.type(self.type_name))
-            puts('Occurrences: %s (%s%s)'
-                 % (self.occurrences,
-                    self.min_occurrences or 0,
-                    (' to %d' % self.max_occurrences)
-                    if self.max_occurrences is not None
-                    else ' or more'))
-            dump_parameters(context, self.properties)
-
-
-class Relationship(Element):
-    """
-    Connects :class:`Node` to another node.
-
-    An instance of a :class:`RelationshipTemplate`.
-
-    Properties:
-
-    * :code:`name`: Name (usually the name of the requirement at the source node template)
-    * :code:`source_requirement_index`: Must be represented in the source node template
-    * :code:`target_node_id`: Must be represented in the :class:`ServiceInstance`
-    * :code:`target_capability_name`: Matches the capability at the target node
-    * :code:`type_name`: Must be represented in the :class:`ModelingContext`
-    * :code:`template_name`: Must be represented in the :class:`ServiceModel`
-    * :code:`properties`: Dict of :class:`Parameter`
-    * :code:`source_interfaces`: Dict of :class:`Interface`
-    * :code:`target_interfaces`: Dict of :class:`Interface`
-    """
-
-    def __init__(self, name=None,
-                 source_requirement_index=None,
-                 type_name=None,
-                 template_name=None):
-        if name is not None and not isinstance(name, basestring):
-            raise ValueError('name must be a string or None')
-        if source_requirement_index is not None and \
-                (not isinstance(source_requirement_index, int) or (source_requirement_index < 0)):
-            raise ValueError('source_requirement_index must be int > 0')
-        if type_name is not None and not isinstance(type_name, basestring):
-            raise ValueError('type_name must be a string or None')
-        if template_name is not None and not isinstance(template_name, basestring):
-            raise ValueError('template_name must be a string or None')
-
-        self.name = name
-        self.source_requirement_index = source_requirement_index
-        self.target_node_id = None
-        self.target_capability_name = None
-        self.type_name = type_name
-        self.template_name = template_name
-        self.properties = StrictDict(key_class=basestring, value_class=Parameter)
-        self.source_interfaces = StrictDict(key_class=basestring, value_class=Interface)
-        self.target_interfaces = StrictDict(key_class=basestring, value_class=Interface)
-
-    @property
-    def as_raw(self):
-        return OrderedDict((
-            ('name', self.name),
-            ('source_requirement_index', self.source_requirement_index),
-            ('target_node_id', self.target_node_id),
-            ('target_capability_name', self.target_capability_name),
-            ('type_name', self.type_name),
-            ('template_name', self.template_name),
-            ('properties', as_raw_dict(self.properties)),
-            ('source_interfaces', as_raw_list(self.source_interfaces)),
-            ('target_interfaces', as_raw_list(self.target_interfaces))))
-
-    def validate(self, context):
-        if self.type_name:
-            if context.modeling.relationship_types.get_descendant(self.type_name) is None:
-                context.validation.report('relationship "%s" has an unknown type: %s'
-                                          % (self.name,
-                                             safe_repr(self.type_name)),
-                                          level=Issue.BETWEEN_TYPES)
-        validate_dict_values(context, self.properties)
-        validate_dict_values(context, self.source_interfaces)
-        validate_dict_values(context, self.target_interfaces)
-
-    def coerce_values(self, context, container, report_issues):
-        coerce_dict_values(context, container, self.properties, report_issues)
-        coerce_dict_values(context, container, self.source_interfaces, report_issues)
-        coerce_dict_values(context, container, self.target_interfaces, report_issues)
-
-    def dump(self, context):
-        if self.name:
-            if self.source_requirement_index is not None:
-                puts('%s (%d) ->' % (context.style.node(self.name), self.source_requirement_index))
-            else:
-                puts('%s ->' % context.style.node(self.name))
-        else:
-            puts('->')
-        with context.style.indent:
-            puts('Node: %s' % context.style.node(self.target_node_id))
-            if self.target_capability_name is not None:
-                puts('Capability: %s' % context.style.node(self.target_capability_name))
-            if self.type_name is not None:
-                puts('Relationship type: %s' % context.style.type(self.type_name))
-            if self.template_name is not None:
-                puts('Relationship template: %s' % context.style.node(self.template_name))
-            dump_parameters(context, self.properties)
-            dump_interfaces(context, self.source_interfaces, 'Source interfaces')
-            dump_interfaces(context, self.target_interfaces, 'Target interfaces')
-
-
-class Artifact(Element):
-    """
-    A file associated with a :class:`Node`.
-
-    Properties:
-
-    * :code:`name`: Name
-    * :code:`description`: Description
-    * :code:`type_name`: Must be represented in the :class:`ModelingContext`
-    * :code:`source_path`: Source path (CSAR or repository)
-    * :code:`target_path`: Path at destination machine
-    * :code:`repository_url`: Repository URL
-    * :code:`repository_credential`: Dict of string
-    * :code:`properties`: Dict of :class:`Parameter`
-    """
-
-    def __init__(self, name, type_name, source_path):
-        if not isinstance(name, basestring):
-            raise ValueError('must set name (string)')
-        if not isinstance(type_name, basestring):
-            raise ValueError('must set type_name (string)')
-        if not isinstance(source_path, basestring):
-            raise ValueError('must set source_path (string)')
-
-        self.name = name
-        self.description = None
-        self.type_name = type_name
-        self.source_path = source_path
-        self.target_path = None
-        self.repository_url = None
-        self.repository_credential = StrictDict(key_class=basestring, value_class=basestring)
-        self.properties = StrictDict(key_class=basestring, value_class=Parameter)
-
-    @property
-    def as_raw(self):
-        return OrderedDict((
-            ('name', self.name),
-            ('description', self.description),
-            ('type_name', self.type_name),
-            ('source_path', self.source_path),
-            ('target_path', self.target_path),
-            ('repository_url', self.repository_url),
-            ('repository_credential', as_agnostic(self.repository_credential)),
-            ('properties', as_raw_dict(self.properties))))
-
-    def validate(self, context):
-        if context.modeling.artifact_types.get_descendant(self.type_name) is None:
-            context.validation.report('artifact "%s" has an unknown type: %s'
-                                      % (self.name,
-                                         safe_repr(self.type_name)),
-                                      level=Issue.BETWEEN_TYPES)
-        validate_dict_values(context, self.properties)
-
-    def coerce_values(self, context, container, report_issues):
-        coerce_dict_values(context, container, self.properties, report_issues)
-
-    def dump(self, context):
-        puts(context.style.node(self.name))
-        if self.description:
-            puts(context.style.meta(self.description))
-        with context.style.indent:
-            puts('Artifact type: %s' % context.style.type(self.type_name))
-            puts('Source path: %s' % context.style.literal(self.source_path))
-            if self.target_path is not None:
-                puts('Target path: %s' % context.style.literal(self.target_path))
-            if self.repository_url is not None:
-                puts('Repository URL: %s' % context.style.literal(self.repository_url))
-            if self.repository_credential:
-                puts('Repository credential: %s'
-                     % context.style.literal(self.repository_credential))
-            dump_parameters(context, self.properties)
-
-
-class Group(Element):
-    """
-    An instance of a :class:`GroupTemplate`.
-
-    Properties:
-
-    * :code:`id`: Unique ID (prefixed with the template name)
-    * :code:`type_name`: Must be represented in the :class:`ModelingContext`
-    * :code:`template_name`: Must be represented in the :class:`ServiceModel`
-    * :code:`properties`: Dict of :class:`Parameter`
-    * :code:`interfaces`: Dict of :class:`Interface`
-    * :code:`policies`: Dict of :class:`GroupPolicy`
-    * :code:`member_node_ids`: Must be represented in the :class:`ServiceInstance`
-    * :code:`member_group_ids`: Must be represented in the :class:`ServiceInstance`
-    """
-
-    def __init__(self, context, type_name, template_name):
-        if not isinstance(template_name, basestring):
-            raise ValueError('must set template_name (string)')
-
-        self.id = '%s_%s' % (template_name, context.modeling.generate_id())
-        self.type_name = type_name
-        self.template_name = template_name
-        self.properties = StrictDict(key_class=basestring, value_class=Parameter)
-        self.interfaces = StrictDict(key_class=basestring, value_class=Interface)
-        self.policies = StrictDict(key_class=basestring, value_class=GroupPolicy)
-        self.member_node_ids = StrictList(value_class=basestring)
-        self.member_group_ids = StrictList(value_class=basestring)
-
-    @property
-    def as_raw(self):
-        return OrderedDict((
-            ('id', self.id),
-            ('type_name', self.type_name),
-            ('template_name', self.template_name),
-            ('properties', as_raw_dict(self.properties)),
-            ('interfaces', as_raw_list(self.interfaces)),
-            ('policies', as_raw_list(self.policies)),
-            ('member_node_ids', self.member_node_ids),
-            ('member_group_ids', self.member_group_ids)))
-
-    def validate(self, context):
-        if context.modeling.group_types.get_descendant(self.type_name) is None:
-            context.validation.report('group "%s" has an unknown type: %s'
-                                      % (self.name,  # pylint: disable=no-member
-                                         # TODO fix self.name reference
-                                         safe_repr(self.type_name)),
-                                      level=Issue.BETWEEN_TYPES)
-
-        validate_dict_values(context, self.properties)
-        validate_dict_values(context, self.interfaces)
-        validate_dict_values(context, self.policies)
-
-    def coerce_values(self, context, container, report_issues):
-        coerce_dict_values(context, container, self.properties, report_issues)
-        coerce_dict_values(context, container, self.interfaces, report_issues)
-        coerce_dict_values(context, container, self.policies, report_issues)
-
-    def dump(self, context):
-        puts('Group: %s' % context.style.node(self.id))
-        with context.style.indent:
-            puts('Type: %s' % context.style.type(self.type_name))
-            puts('Template: %s' % context.style.type(self.template_name))
-            dump_parameters(context, self.properties)
-            dump_interfaces(context, self.interfaces)
-            dump_dict_values(context, self.policies, 'Policies')
-            if self.member_node_ids:
-                puts('Member nodes:')
-                with context.style.indent:
-                    for node_id in self.member_node_ids:
-                        puts(context.style.node(node_id))
-
-
-class Policy(Element):
-    """
-    An instance of a :class:`PolicyTemplate`.
-
-    Properties:
-
-    * :code:`name`: Name
-    * :code:`type_name`: Must be represented in the :class:`ModelingContext`
-    * :code:`properties`: Dict of :class:`Parameter`
-    * :code:`target_node_ids`: Must be represented in the :class:`ServiceInstance`
-    * :code:`target_group_ids`: Must be represented in the :class:`ServiceInstance`
-    """
-
-    def __init__(self, name, type_name):
-        if not isinstance(name, basestring):
-            raise ValueError('must set name (string)')
-        if not isinstance(type_name, basestring):
-            raise ValueError('must set type_name (string)')
-
-        self.name = name
-        self.type_name = type_name
-        self.properties = StrictDict(key_class=basestring, value_class=Parameter)
-        self.target_node_ids = StrictList(value_class=basestring)
-        self.target_group_ids = StrictList(value_class=basestring)
-
-    @property
-    def as_raw(self):
-        return OrderedDict((
-            ('name', self.name),
-            ('type_name', self.type_name),
-            ('properties', as_raw_dict(self.properties)),
-            ('target_node_ids', self.target_node_ids),
-            ('target_group_ids', self.target_group_ids)))
-
-    def validate(self, context):
-        if context.modeling.policy_types.get_descendant(self.type_name) is None:
-            context.validation.report('policy "%s" has an unknown type: %s'
-                                      % (self.name,
-                                         safe_repr(self.type_name)),
-                                      level=Issue.BETWEEN_TYPES)
-
-        validate_dict_values(context, self.properties)
-
-    def coerce_values(self, context, container, report_issues):
-        coerce_dict_values(context, container, self.properties, report_issues)
-
-    def dump(self, context):
-        puts('Policy: %s' % context.style.node(self.name))
-        with context.style.indent:
-            puts('Type: %s' % context.style.type(self.type_name))
-            dump_parameters(context, self.properties)
-            if self.target_node_ids:
-                puts('Target nodes:')
-                with context.style.indent:
-                    for node_id in self.target_node_ids:
-                        puts(context.style.node(node_id))
-            if self.target_group_ids:
-                puts('Target groups:')
-                with context.style.indent:
-                    for group_id in self.target_group_ids:
-                        puts(context.style.node(group_id))
-
-
-class GroupPolicy(Element):
-    """
-    Policies applied to groups.
-
-    Properties:
-
-    * :code:`name`: Name
-    * :code:`description`: Description
-    * :code:`type_name`: Must be represented in the :class:`ModelingContext`
-    * :code:`properties`: Dict of :class:`Parameter`
-    * :code:`triggers`: Dict of :class:`GroupPolicyTrigger`
-    """
-
-    def __init__(self, name, type_name):
-        if not isinstance(name, basestring):
-            raise ValueError('must set name (string)')
-        if not isinstance(type_name, basestring):
-            raise ValueError('must set type_name (string)')
-
-        self.name = name
-        self.description = None
-        self.type_name = type_name
-        self.properties = StrictDict(key_class=basestring, value_class=Parameter)
-        self.triggers = StrictDict(key_class=basestring, value_class=GroupPolicyTrigger)
-
-    @property
-    def as_raw(self):
-        return OrderedDict((
-            ('name', self.name),
-            ('description', self.description),
-            ('type_name', self.type_name),
-            ('properties', as_raw_dict(self.properties)),
-            ('triggers', as_raw_list(self.triggers))))
-
-    def validate(self, context):
-        if context.modeling.policy_types.get_descendant(self.type_name) is None:
-            context.validation.report('group policy "%s" has an unknown type: %s'
-                                      % (self.name,
-                                         safe_repr(self.type_name)),
-                                      level=Issue.BETWEEN_TYPES)
-
-        validate_dict_values(context, self.properties)
-        validate_dict_values(context, self.triggers)
-
-    def coerce_values(self, context, container, report_issues):
-        coerce_dict_values(context, container, self.properties, report_issues)
-        coerce_dict_values(context, container, self.triggers, report_issues)
-
-    def dump(self, context):
-        puts(context.style.node(self.name))
-        if self.description:
-            puts(context.style.meta(self.description))
-        with context.style.indent:
-            puts('Group policy type: %s' % context.style.type(self.type_name))
-            dump_parameters(context, self.properties)
-            dump_dict_values(context, self.triggers, 'Triggers')
-
-
-class GroupPolicyTrigger(Element):
-    """
-    Triggers for :class:`GroupPolicy`.
-
-    Properties:
-
-    * :code:`name`: Name
-    * :code:`description`: Description
-    * :code:`implementation`: Implementation string (interpreted by the orchestrator)
-    * :code:`properties`: Dict of :class:`Parameter`
-    """
-
-    def __init__(self, name, implementation):
-        if not isinstance(name, basestring):
-            raise ValueError('must set name (string)')
-        if not isinstance(implementation, basestring):
-            raise ValueError('must set implementation (string)')
-
-        self.name = name
-        self.description = None
-        self.implementation = implementation
-        self.properties = StrictDict(key_class=basestring, value_class=Parameter)
-
-    @property
-    def as_raw(self):
-        return OrderedDict((
-            ('name', self.name),
-            ('description', self.description),
-            ('implementation', self.implementation),
-            ('properties', as_raw_dict(self.properties))))
-
-    def validate(self, context):
-        validate_dict_values(context, self.properties)
-
-    def coerce_values(self, context, container, report_issues):
-        coerce_dict_values(context, container, self.properties, report_issues)
-
-    def dump(self, context):
-        puts(context.style.node(self.name))
-        if self.description:
-            puts(context.style.meta(self.description))
-        with context.style.indent:
-            puts('Implementation: %s' % context.style.literal(self.implementation))
-            dump_parameters(context, self.properties)
-
-
-class Mapping(Element):
-    """
-    An instance of a :class:`MappingTemplate`.
-
-    Properties:
-
-    * :code:`mapped_name`: Exposed capability or requirement name
-    * :code:`node_id`: Must be represented in the :class:`ServiceInstance`
-    * :code:`name`: Name of capability or requirement at the node
-    """
-
-    def __init__(self, mapped_name, node_id, name):
-        if not isinstance(mapped_name, basestring):
-            raise ValueError('must set mapped_name (string)')
-        if not isinstance(node_id, basestring):
-            raise ValueError('must set node_id (string)')
-        if not isinstance(name, basestring):
-            raise ValueError('must set name (string)')
-
-        self.mapped_name = mapped_name
-        self.node_id = node_id
-        self.name = name
-
-    @property
-    def as_raw(self):
-        return OrderedDict((
-            ('mapped_name', self.mapped_name),
-            ('node_id', self.node_id),
-            ('name', self.name)))
-
-    def dump(self, context):
-        puts('%s -> %s.%s'
-             % (context.style.node(self.mapped_name),
-                context.style.node(self.node_id),
-                context.style.node(self.name)))
-
-
-class Substitution(Element):
-    """
-    An instance of a :class:`SubstitutionTemplate`.
-
-    Properties:
-
-    * :code:`node_type_name`: Must be represented in the :class:`ModelingContext`
-    * :code:`capabilities`: Dict of :class:`Mapping`
-    * :code:`requirements`: Dict of :class:`Mapping`
-    """
-
-    def __init__(self, node_type_name):
-        if not isinstance(node_type_name, basestring):
-            raise ValueError('must set node_type_name (string)')
-
-        self.node_type_name = node_type_name
-        self.capabilities = StrictDict(key_class=basestring, value_class=Mapping)
-        self.requirements = StrictDict(key_class=basestring, value_class=Mapping)
-
-    @property
-    def as_raw(self):
-        return OrderedDict((
-            ('node_type_name', self.node_type_name),
-            ('capabilities', as_raw_list(self.capabilities)),
-            ('requirements', as_raw_list(self.requirements))))
-
-    def validate(self, context):
-        if context.modeling.node_types.get_descendant(self.node_type_name) is None:
-            context.validation.report('substitution "%s" has an unknown type: %s'
-                                      % (self.name,  # pylint: disable=no-member
-                                         # TODO fix self.name reference
-                                         safe_repr(self.node_type_name)),
-                                      level=Issue.BETWEEN_TYPES)
-
-        validate_dict_values(context, self.capabilities)
-        validate_dict_values(context, self.requirements)
-
-    def coerce_values(self, context, container, report_issues):
-        coerce_dict_values(context, container, self.capabilities, report_issues)
-        coerce_dict_values(context, container, self.requirements, report_issues)
-
-    def dump(self, context):
-        puts('Substitution:')
-        with context.style.indent:
-            puts('Node type: %s' % context.style.type(self.node_type_name))
-            dump_dict_values(context, self.capabilities, 'Capability mappings')
-            dump_dict_values(context, self.requirements, 'Requirement mappings')
-
-
-class Interface(Element):
-    """
-    A typed set of :class:`Operation`.
-
-    Properties:
-
-    * :code:`name`: Name
-    * :code:`description`: Description
-    * :code:`type_name`: Must be represented in the :class:`ModelingContext`
-    * :code:`inputs`: Dict of :class:`Parameter`
-    * :code:`operations`: Dict of :class:`Operation`
-    """
-
-    def __init__(self, name, type_name):
-        if not isinstance(name, basestring):
-            raise ValueError('must set name (string)')
-
-        self.name = name
-        self.description = None
-        self.type_name = type_name
-        self.inputs = StrictDict(key_class=basestring, value_class=Parameter)
-        self.operations = StrictDict(key_class=basestring, value_class=Operation)
-
-    @property
-    def as_raw(self):
-        return OrderedDict((
-            ('name', self.name),
-            ('description', self.description),
-            ('type_name', self.type_name),
-            ('inputs', as_raw_dict(self.inputs)),
-            ('operations', as_raw_list(self.operations))))
-
-    def validate(self, context):
-        if self.type_name:
-            if context.modeling.interface_types.get_descendant(self.type_name) is None:
-                context.validation.report('interface "%s" has an unknown type: %s'
-                                          % (self.name,
-                                             safe_repr(self.type_name)),
-                                          level=Issue.BETWEEN_TYPES)
-
-        validate_dict_values(context, self.inputs)
-        validate_dict_values(context, self.operations)
-
-    def coerce_values(self, context, container, report_issues):
-        coerce_dict_values(context, container, self.inputs, report_issues)
-        coerce_dict_values(context, container, self.operations, report_issues)
-
-    def dump(self, context):
-        puts(context.style.node(self.name))
-        if self.description:
-            puts(context.style.meta(self.description))
-        with context.style.indent:
-            puts('Interface type: %s' % context.style.type(self.type_name))
-            dump_parameters(context, self.inputs, 'Inputs')
-            dump_dict_values(context, self.operations, 'Operations')
-
-
-class Operation(Element):
-    """
-    An operation in a :class:`Interface`.
-
-    Properties:
-
-    * :code:`name`: Name
-    * :code:`description`: Description
-    * :code:`implementation`: Implementation string (interpreted by the orchestrator)
-    * :code:`dependencies`: List of strings (interpreted by the orchestrator)
-    * :code:`executor`: Executor string (interpreted by the orchestrator)
-    * :code:`max_retries`: Maximum number of retries allowed in case of failure
-    * :code:`retry_interval`: Interval between retries
-    * :code:`inputs`: Dict of :class:`Parameter`
-    """
-
-    def __init__(self, name):
-        if not isinstance(name, basestring):
-            raise ValueError('must set name (string)')
-
-        self.name = name
-        self.description = None
-        self.implementation = None
-        self.dependencies = StrictList(value_class=basestring)
-        self.executor = None
-        self.max_retries = None
-        self.retry_interval = None
-        self.inputs = StrictDict(key_class=basestring, value_class=Parameter)
-
-    @property
-    def as_raw(self):
-        return OrderedDict((
-            ('name', self.name),
-            ('description', self.description),
-            ('implementation', self.implementation),
-            ('dependencies', self.dependencies),
-            ('executor', self.executor),
-            ('max_retries', self.max_retries),
-            ('retry_interval', self.retry_interval),
-            ('inputs', as_raw_dict(self.inputs))))
-
-    def validate(self, context):
-        validate_dict_values(context, self.inputs)
-
-    def coerce_values(self, context, container, report_issues):
-        coerce_dict_values(context, container, self.inputs, report_issues)
-
-    def dump(self, context):
-        puts(context.style.node(self.name))
-        if self.description:
-            puts(context.style.meta(self.description))
-        with context.style.indent:
-            if self.implementation is not None:
-                puts('Implementation: %s' % context.style.literal(self.implementation))
-            if self.dependencies:
-                puts('Dependencies: %s'
-                     % ', '.join((str(context.style.literal(v)) for v in self.dependencies)))
-            if self.executor is not None:
-                puts('Executor: %s' % context.style.literal(self.executor))
-            if self.max_retries is not None:
-                puts('Max retries: %s' % context.style.literal(self.max_retries))
-            if self.retry_interval is not None:
-                puts('Retry interval: %s' % context.style.literal(self.retry_interval))
-            dump_parameters(context, self.inputs, 'Inputs')


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