7d2583098f
* python3 doesn't have types.ListType, using just 'list' instead * python3 doesn't have types.StringTypes, using six.string_types instead Change-Id: I43125bb2ecd25cf958b299d26f4ac3a7828e9499
50 lines
1.5 KiB
Python
50 lines
1.5 KiB
Python
# All Rights Reserved.
|
|
#
|
|
# 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 re
|
|
|
|
import six
|
|
import yaql
|
|
|
|
|
|
class YaqlExpression(object):
|
|
def __init__(self, expression):
|
|
self._expression = str(expression)
|
|
self._parsed_expression = yaql.parse(self._expression)
|
|
|
|
def expression(self):
|
|
return self._expression
|
|
|
|
def __repr__(self):
|
|
return 'YAQL(%s)' % self._expression
|
|
|
|
def __str__(self):
|
|
return self._expression
|
|
|
|
@staticmethod
|
|
def match(expr):
|
|
if not isinstance(expr, six.string_types):
|
|
return False
|
|
if re.match('^[\s\w\d.:]*$', expr):
|
|
return False
|
|
try:
|
|
yaql.parse(expr)
|
|
return True
|
|
except yaql.exceptions.YaqlGrammarException:
|
|
return False
|
|
except yaql.exceptions.YaqlLexicalException:
|
|
return False
|
|
|
|
def evaluate(self, data=None, context=None):
|
|
return self._parsed_expression.evaluate(data=data, context=context)
|