46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import collections
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import six
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from heat.common.i18n import _
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from heat.engine import constraints
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class ResourceTypeConstraint(constraints.BaseCustomConstraint):
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def validate(self, value, context, template):
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if not isinstance(value, collections.Sequence):
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return False
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if isinstance(value, six.string_types):
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value = [value]
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invalid_types = []
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for t in value:
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try:
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template.env.get_class(t)
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except Exception:
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invalid_types.append(t)
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if invalid_types:
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msg = _('The following resource types could not be found: %s')
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types = ','.join(invalid_types)
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self._error_message = msg % types
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return False
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return True
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