/usr/lib/python2.7/dist-packages/sardana/pool/poolextension.py is in python-sardana 1.2.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 | #!/usr/bin/env python
##############################################################################
##
## This file is part of Sardana
##
## http://www.tango-controls.org/static/sardana/latest/doc/html/index.html
##
## Copyright 2011 CELLS / ALBA Synchrotron, Bellaterra, Spain
##
## Sardana is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## Sardana is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU Lesser General Public License for more details.
##
## You should have received a copy of the GNU Lesser General Public License
## along with Sardana. If not, see <http://www.gnu.org/licenses/>.
##
##############################################################################
"""This module is part of the Python Sardana libray. It defines the base classes
for sardana value translation"""
__all__ = ["CannotTranslateException",
"register_controller_value_translator",
"register_controller_state_translator",
"ControllerValueTranslator", "ControllerStateTranslator"]
__docformat__ = 'restructuredtext'
from sardana.sardanavalue import SardanaValue
__CTRL_STATE_TRANSLATORS = {}
__CTRL_VALUE_TRANSLATORS = {}
class CannotTranslateException(Exception):
def __init__(self, *args, **kwargs):
super(CannotTranslateException, self).__init__(*args, **kwargs)
class BaseControllerTranslator(object):
def translate(self, value):
raise CannotTranslateException
def __call__(self, value):
return self.translate(value)
class ControllerValueTranslator(BaseControllerTranslator):
pass
class ControllerStateTranslator(BaseControllerTranslator):
pass
def register_controller_value_translator(klass, *args, **kwargs):
if not issubclass(klass, ControllerValueTranslator):
raise Exception("Cannot register controller value translator. " \
"Class must inherit from ControllerValueTranslator")
__CTRL_VALUE_TRANSLATORS[klass] = klass(*args, **kwargs)
def register_controller_state_translator(klass, *args, **kwargs):
if not issubclass(klass, ControllerStateTranslator):
raise Exception("Cannot register controller value translator. " \
"Class must inherit from ControllerStateTranslator")
__CTRL_STATE_TRANSLATORS[klass] = klass(*args, **kwargs)
def translate_ctrl_value(value):
if isinstance(value, SardanaValue):
return value
for _, translator in __CTRL_VALUE_TRANSLATORS.items():
try:
return translator(value)
except CannotTranslateException:
continue
# Fallback translator
return SardanaValue(value=value)
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