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# Licensed 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.
import logging
import os
import toscaparser.utils.yamlparser
log = logging.getLogger('tosca')
class EntityType(object):
'''Base class for TOSCA elements.'''
SECTIONS = (DERIVED_FROM, PROPERTIES, ATTRIBUTES, REQUIREMENTS,
INTERFACES, CAPABILITIES, TYPE, ARTIFACTS) = \
('derived_from', 'properties', 'attributes', 'requirements',
'interfaces', 'capabilities', 'type', 'artifacts')
'''TOSCA definition file.'''
TOSCA_DEF_FILE = os.path.join(
os.path.dirname(os.path.abspath(__file__)),
"TOSCA_definition_1_0.yaml")
loader = toscaparser.utils.yamlparser.load_yaml
TOSCA_DEF = loader(TOSCA_DEF_FILE)
RELATIONSHIP_TYPE = (DEPENDSON, HOSTEDON, CONNECTSTO, ATTACHESTO,
LINKSTO, BINDSTO) = \
('tosca.relationships.DependsOn',
'tosca.relationships.HostedOn',
'tosca.relationships.ConnectsTo',
'tosca.relationships.AttachesTo',
'tosca.relationships.network.LinksTo',
'tosca.relationships.network.BindsTo')
NODE_PREFIX = 'tosca.nodes.'
RELATIONSHIP_PREFIX = 'tosca.relationships.'
CAPABILITY_PREFIX = 'tosca.capabilities.'
INTERFACE_PREFIX = 'tosca.interfaces.'
ARTIFACT_PREFIX = 'tosca.artifacts.'
POLICY_PREFIX = 'tosca.policies.'
# currently the data types are defined only for network
# but may have changes in the future.
DATATYPE_PREFIX = 'tosca.datatypes.network.'
TOSCA = 'tosca'
def derived_from(self, defs):
'''Return a type this type is derived from.'''
return self.entity_value(defs, 'derived_from')
def is_derived_from(self, type_str):
'''Check if object inherits from the given type.
Returns true if this object is derived from 'type_str'.
False otherwise.
'''
if not self.type:
return False
elif self.type == type_str:
return True
elif self.parent_type:
return self.parent_type.is_derived_from(type_str)
else:
return False
def entity_value(self, defs, key):
if key in defs:
return defs[key]
def get_value(self, ndtype, defs=None, parent=None):
value = None
if defs is None:
if not hasattr(self, 'defs'):
return
defs = self.defs
if ndtype in defs:
value = defs[ndtype]
if parent and not value:
p = self.parent_type
while value is None:
# check parent node
if not p:
break
if p and p.type == 'tosca.nodes.Root':
break
value = p.get_value(ndtype)
p = p.parent_type
return value
def get_definition(self, ndtype):
value = None
defs = self.defs
if ndtype in defs:
value = defs[ndtype]
p = self.parent_type
if p:
inherited = p.get_definition(ndtype)
if inherited:
inherited = dict(inherited)
if not value:
value = inherited
else:
inherited.update(value)
value.update(inherited)
return value
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