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#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you 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.
#
class Context:
def __init__(self):
self.containers = []
def push(self, o):
self.containers.append(o)
def pop(self):
return self.containers.pop()
class Values:
def __init__(self, *values):
self.values = values
def validate(self, o, ctx):
if not o in self.values:
return "%s not in %s" % (o, self.values)
def __str__(self):
return self.value
class Types:
def __init__(self, *types):
self.types = types
def validate(self, o, ctx):
for t in self.types:
if isinstance(o, t):
return
if len(self.types) == 1:
return "%s is not a %s" % (o, self.types[0].__name__)
else:
return "%s is not one of: %s" % (o, ", ".join([t.__name__ for t in self.types]))
class List:
def __init__(self, condition):
self.condition = condition
def validate(self, o, ctx):
if not isinstance(o, list):
return "%s is not a list" % o
ctx.push(o)
for v in o:
err = self.condition.validate(v, ctx)
if err: return err
class Map:
def __init__(self, map, restricted=True):
self.map = map
self.restricted = restricted
def validate(self, o, ctx):
errors = []
if not hasattr(o, "get"):
return "%s is not a map" % o
ctx.push(o)
for k, t in self.map.items():
v = o.get(k)
if v is not None:
err = t.validate(v, ctx)
if err: errors.append("%s: %s" % (k, err))
if self.restricted:
for k in o:
if not k in self.map:
errors.append("%s: illegal key" % k)
ctx.pop()
if errors:
return ", ".join(errors)
class And:
def __init__(self, *conditions):
self.conditions = conditions
def validate(self, o, ctx):
for c in self.conditions:
err = c.validate(o, ctx)
if err:
return err
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