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#
# Copyright (c) 2006 The Apache Software Foundation
#
# 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.
#
from sets import Set
class Message:
COMMON_FIELDS = Set(("content", "method", "fields"))
def __init__(self, method, fields, content = None):
self.method = method
self.fields = fields
self.content = content
def __len__(self):
l = len(self.fields)
if self.method.content:
l += 1
return len(self.fields)
def _idx(self, idx):
if idx < 0: idx += len(self)
if idx < 0 or idx > len(self):
raise IndexError(idx)
return idx
def __getitem__(self, idx):
idx = self._idx(idx)
if idx == len(self.fields):
return self.content
else:
return self.fields[idx]
def __setitem__(self, idx, value):
idx = self._idx(idx)
if idx == len(self.fields):
self.content = value
else:
self.fields[idx] = value
def _slot(self, attr):
if attr in Message.COMMON_FIELDS:
env = self.__dict__
key = attr
else:
env = self.fields
try:
field = self.method.fields.bypyname[attr]
key = self.method.fields.index(field)
except KeyError:
raise AttributeError(attr)
return env, key
def __getattr__(self, attr):
env, key = self._slot(attr)
return env[key]
def __setattr__(self, attr, value):
env, key = self._slot(attr)
env[attr] = value
STR = "%s %s content = %s"
REPR = STR.replace("%s", "%r")
def __str__(self):
return Message.STR % (self.method, self.fields, self.content)
def __repr__(self):
return Message.REPR % (self.method, self.fields, self.content)
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