# The MIT License (MIT)
# Copyright (c) 2014-2017 University of Bristol
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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from . import Stream, StreamId, StreamInstance
from ..utils import TypedBiDict, FrozenKeyDict
[docs]class StreamDict(TypedBiDict):
"""
Custom bi-directional dictionary where keys are StreamID objects and values are Stream objects.
Raises ValueDuplicationError if the same Stream is added again
"""
def __init__(self, *args, **kwargs):
super(StreamDict, self).__init__(StreamId, Stream, *args, **kwargs)
[docs]class StreamInstanceCollection(FrozenKeyDict):
"""
A custom frozen dictionary for stream instances. Will raise an exception if a repeated instance is added
"""
[docs] def append(self, instance):
if not (isinstance(instance, StreamInstance)):
raise ValueError("Expected StreamInstance, got {}".format(type(instance)))
self[instance.timestamp] = instance.value
[docs] def extend(self, instances):
for instance in instances:
self.append(instance)