/usr/lib/python2.7/dist-packages/oslo_reports/views/xml/generic.py is in python-oslo.reports 1.7.0-2.
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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.
"""Provides generic XML views
This modules defines several basic views for serializing
data to XML. Submodels that have already been serialized
as XML may have their string values marked with `__is_xml__
= True` using :class:`oslo_reports._utils.StringWithAttrs`
(each of the classes within this module does this automatically,
and non-naive serializers check for this attribute and handle
such strings specially)
"""
import collections as col
import copy
import xml.etree.ElementTree as ET
import six
from oslo_reports import _utils as utils
class KeyValueView(object):
"""A Key-Value XML View
This view performs advanced serialization of a data model
into XML. It first deserializes any values marked as XML so
that they can be properly reserialized later. It then follows
the following rules to perform serialization:
key : text/xml
The tag name is the key name, and the contents are the text or xml
key : Sequence
A wrapper tag is created with the key name, and each item is placed
in an 'item' tag
key : Mapping
A wrapper tag is created with the key name, and the serialize is called
on each key-value pair (such that each key gets its own tag)
:param str wrapper_name: the name of the top-level element
"""
def __init__(self, wrapper_name="model"):
self.wrapper_name = wrapper_name
def __call__(self, model):
# this part deals with subviews that were already serialized
cpy = copy.deepcopy(model)
for key, valstr in model.items():
if getattr(valstr, '__is_xml__', False):
cpy[key] = ET.fromstring(valstr)
def serialize(rootmodel, rootkeyname):
res = ET.Element(rootkeyname)
if isinstance(rootmodel, col.Mapping):
for key in sorted(rootmodel):
res.append(serialize(rootmodel[key], key))
elif (isinstance(rootmodel, col.Sequence)
and not isinstance(rootmodel, six.string_types)):
for val in sorted(rootmodel, key=str):
res.append(serialize(val, 'item'))
elif ET.iselement(rootmodel):
res.append(rootmodel)
else:
res.text = six.text_type(rootmodel)
return res
str_ = ET.tostring(serialize(cpy,
self.wrapper_name),
encoding="utf-8").decode("utf-8")
res = utils.StringWithAttrs(str_)
res.__is_xml__ = True
return res
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