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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 operator
import jsonpath_rw
OPERATOR_MAP = {
'+': operator.add,
'-': operator.sub,
'*': operator.mul,
'/': operator.truediv,
}
class Operation(jsonpath_rw.JSONPath):
def __init__(self, left, op, right):
self.left = left
self.op = OPERATOR_MAP[op]
self.right = right
def find(self, datum):
result = []
if (isinstance(self.left, jsonpath_rw.JSONPath)
and isinstance(self.right, jsonpath_rw.JSONPath)):
left = self.left.find(datum)
right = self.right.find(datum)
if left and right and len(left) == len(right):
for l, r in zip(left, right):
try:
result.append(self.op(l.value, r.value))
except TypeError:
return []
else:
return []
elif isinstance(self.left, jsonpath_rw.JSONPath):
left = self.left.find(datum)
for l in left:
try:
result.append(self.op(l.value, self.right))
except TypeError:
return []
elif isinstance(self.right, jsonpath_rw.JSONPath):
right = self.right.find(datum)
for r in right:
try:
result.append(self.op(self.left, r.value))
except TypeError:
return []
else:
try:
result.append(self.op(self.left, self.right))
except TypeError:
return []
return [jsonpath_rw.DatumInContext.wrap(r) for r in result]
def __repr__(self):
return '%s(%r%s%r)' % (self.__class__.__name__, self.left, self.op,
self.right)
def __str__(self):
return '%s%s%s' % (self.left, self.op, self.right)
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