CIM14/IEC61970/Meas/DiscreteValue.py

   1 # Copyright (C) 2010-2011 Richard Lincoln
   2 #
   3 # Permission is hereby granted, free of charge, to any person obtaining a copy
   4 # of this software and associated documentation files (the "Software"), to
   5 # deal in the Software without restriction, including without limitation the
   6 # rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   7 # sell copies of the Software, and to permit persons to whom the Software is
   8 # furnished to do so, subject to the following conditions:
   9 #
  10 # The above copyright notice and this permission notice shall be included in
  11 # all copies or substantial portions of the Software.
  12 #
  13 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  16 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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  18 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  19 # IN THE SOFTWARE.
  20
  21 from CIM14.IEC61970.Meas.MeasurementValue import MeasurementValue
  22
  23 class DiscreteValue(MeasurementValue):
  24     """DiscreteValue represents a discrete MeasurementValue.
  25     """
  26
  27     def __init__(self, value=0, Discrete=None, *args, **kw_args):
  28         """Initialises a new 'DiscreteValue' instance.
  29
  30         @param value: The value to supervise.
  31         @param Discrete: Measurement to which this value is connected.
  32         """
  33         #: The value to supervise.
  34         self.value = value
  35
  36         self._Discrete = None
  37         self.Discrete = Discrete
  38
  39         super(DiscreteValue, self).__init__(*args, **kw_args)
  40
  41     _attrs = ["value"]
  42     _attr_types = {"value": int}
  43     _defaults = {"value": 0}
  44     _enums = {}
  45     _refs = ["Discrete"]
  46     _many_refs = []
  47
  48     def getDiscrete(self):
  49         """Measurement to which this value is connected.
  50         """
  51         return self._Discrete
  52
  53     def setDiscrete(self, value):
  54         if self._Discrete is not None:
  55             filtered = [x for x in self.Discrete.DiscreteValues if x != self]
  56             self._Discrete._DiscreteValues = filtered
  57
  58         self._Discrete = value
  59         if self._Discrete is not None:
  60             if self not in self._Discrete._DiscreteValues:
  61                 self._Discrete._DiscreteValues.append(self)
  62
  63     Discrete = property(getDiscrete, setDiscrete)
  64