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# Copyright 2013 Red Hat, Inc.
#
# 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 copy
from oslo_reports.models import base as base_model
from oslo_reports.views.json import generic as jsonviews
from oslo_reports.views.text import generic as textviews
from oslo_reports.views.xml import generic as xmlviews
class ModelWithDefaultViews(base_model.ReportModel):
"""A Model With Default Views of Various Types
A model with default views has several predefined views,
each associated with a given type. This is often used for
when a submodel should have an attached view, but the view
differs depending on the serialization format
Parameters are as the superclass, except for any
parameters ending in '_view': these parameters
get stored as default views.
The default 'default views' are
text
:class:`oslo_reports.views.text.generic.KeyValueView`
xml
:class:`oslo_reports.views.xml.generic.KeyValueView`
json
:class:`oslo_reports.views.json.generic.KeyValueView`
.. function:: to_type()
('type' is one of the 'default views' defined for this model)
Serializes this model using the default view for 'type'
:rtype: str
:returns: this model serialized as 'type'
"""
def __init__(self, *args, **kwargs):
self.views = {
'text': textviews.KeyValueView(),
'json': jsonviews.KeyValueView(),
'xml': xmlviews.KeyValueView()
}
newargs = copy.copy(kwargs)
for k in kwargs:
if k.endswith('_view'):
self.views[k[:-5]] = kwargs[k]
del newargs[k]
super().__init__(*args, **newargs)
def set_current_view_type(self, tp, visited=None):
self.attached_view = self.views[tp]
super().set_current_view_type(tp, visited)
def __getattr__(self, attrname):
if attrname[:3] == 'to_':
if self.views[attrname[3:]] is not None:
return lambda: self.views[attrname[3:]](self)
else:
raise NotImplementedError((
"Model {cn.__module__}.{cn.__name__} does not have" +
" a default view for "
"{tp}").format(cn=type(self), tp=attrname[3:]))
else:
return super().__getattr__(attrname)
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