tosca2heat/tosca-parser/toscaparser/elements/relationshiptype.py

   1 #    Licensed under the Apache License, Version 2.0 (the "License"); you may
   2 #    not use this file except in compliance with the License. You may obtain
   3 #    a copy of the License at
   4 #
   5 #         http://www.apache.org/licenses/LICENSE-2.0
   6 #
   7 #    Unless required by applicable law or agreed to in writing, software
   8 #    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   9 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  10 #    License for the specific language governing permissions and limitations
  11 #    under the License.
  12
  13 from toscaparser.common.exception import ExceptionCollector
  14 from toscaparser.common.exception import UnknownFieldError
  15 from toscaparser.elements.statefulentitytype import StatefulEntityType
  16
  17
  18 class RelationshipType(StatefulEntityType):
  19     '''TOSCA built-in relationship type.'''
  20     SECTIONS = (DERIVED_FROM, VALID_TARGET_TYPES, INTERFACES,
  21                 ATTRIBUTES, PROPERTIES, DESCRIPTION, VERSION,
  22                 CREDENTIAL) = ('derived_from', 'valid_target_types',
  23                                'interfaces', 'attributes', 'properties',
  24                                'description', 'version', 'credential')
  25
  26     def __init__(self, type, capability_name=None, custom_def=None):
  27         super(RelationshipType, self).__init__(type, self.RELATIONSHIP_PREFIX,
  28                                                custom_def)
  29         self.capability_name = capability_name
  30         self.custom_def = custom_def
  31         self._validate_keys()
  32
  33     @property
  34     def parent_type(self):
  35         '''Return a relationship this reletionship is derived from.'''
  36         prel = self.derived_from(self.defs)
  37         if prel:
  38             return RelationshipType(prel, self.custom_def)
  39
  40     @property
  41     def valid_target_types(self):
  42         return self.entity_value(self.defs, 'valid_target_types')
  43
  44     def _validate_keys(self):
  45         for key in self.defs.keys():
  46             if key not in self.SECTIONS:
  47                 ExceptionCollector.appendException(
  48                     UnknownFieldError(what='Relationshiptype "%s"' % self.type,
  49                                       field=key))