94c904e1cb
Both properties and methods can be marked as Usage: Static
Statics can be accessed using ns:Class.property / ns:Class.method(),
:Class.property / :Class.method() to access class from current namespace
or type('full.name').property / type('full.name').method() to use full type name.
In static method $ / $this are referencing current class rather than object.
Static properties are not loaded from object model.
Also methods of io.murano.configuration.Linux class are now static.
Since static methods can be called on the instance it doesn't break
backward compatibility.
Implements blueprint: muranopl-statics
Change-Id: Ic7c6beed9222f4bca118877a60fdabfdd9d65e5a
83 lines
2.7 KiB
Python
83 lines
2.7 KiB
Python
# Copyright (c) 2014 Mirantis, Inc.
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#
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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 re
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import six
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from yaql.language import exceptions as yaql_exceptions
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from yaql.language import expressions
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from murano.dsl import constants
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from murano.dsl import dsl_types
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from murano.dsl import yaql_integration
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class YaqlExpression(dsl_types.YaqlExpression):
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def __init__(self, expression, version):
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self._version = version
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if isinstance(expression, six.string_types):
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self._expression = six.text_type(expression)
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self._parsed_expression = yaql_integration.parse(
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self._expression, version)
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self._file_position = None
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elif isinstance(expression, YaqlExpression):
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self._expression = expression._expression
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self._parsed_expression = expression._parsed_expression
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self._file_position = expression._file_position
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elif isinstance(expression, expressions.Statement):
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self._expression = six.text_type(expression)
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self._parsed_expression = expression
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self._file_position = None
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else:
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raise TypeError('expression is not of supported types')
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@property
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def expression(self):
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return self._expression
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@property
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def version(self):
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return self._version
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@property
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def source_file_position(self):
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return self._file_position
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@source_file_position.setter
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def source_file_position(self, value):
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self._file_position = value
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def __repr__(self):
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return 'YAQL(%s)' % self._expression
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def __str__(self):
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return self._expression
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@staticmethod
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def is_expression(expression, version):
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if not isinstance(expression, six.string_types):
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return False
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if re.match('^[\s\w\d.]*$', expression):
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return False
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try:
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yaql_integration.parse(expression, version)
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return True
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except yaql_exceptions.YaqlParsingException:
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return False
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def __call__(self, context):
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if context:
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context[constants.CTX_CURRENT_INSTRUCTION] = self
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return self._parsed_expression.evaluate(context=context)
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