migrated secop_psi drivers to new syntax
- includes all changes up to 'fix inheritance order' from git_mlz
6a32ecf342
Change-Id: Ie3ceee3dbd0a9284b47b1d5b5dbe262eebe8f283
This commit is contained in:
607
secop/params.py
607
secop/params.py
@@ -23,154 +23,243 @@
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"""Define classes for Parameters/Commands and Overriding them"""
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from collections import OrderedDict
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from inspect import cleandoc
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import inspect
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from secop.datatypes import CommandType, DataType, StringType, BoolType, EnumType, DataTypeType, ValueType, OrType, \
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NoneOr, TextType, IntRange
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from secop.errors import ProgrammingError, BadValueError
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from secop.datatypes import BoolType, CommandType, DataType, \
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DataTypeType, EnumType, IntRange, NoneOr, OrType, \
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StringType, StructOf, TextType, TupleOf, ValueType
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from secop.errors import BadValueError, ProgrammingError
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from secop.properties import HasProperties, Property
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class CountedObj:
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ctr = [0]
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def __init__(self):
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cl = self.__class__.ctr
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cl[0] += 1
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self.ctr = cl[0]
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UNSET = object() # an argument not given, not even None
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class Accessible(HasProperties, CountedObj):
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'''base class for Parameter and Command'''
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class Accessible(HasProperties):
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"""base class for Parameter and Command"""
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properties = {}
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kwds = None # is a dict if it might be used as Override
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def __init__(self, **kwds):
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super(Accessible, self).__init__()
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# do not use self.properties.update here, as no invalid values should be
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super().__init__()
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self.init(kwds)
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def init(self, kwds):
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# do not use self.propertyValues.update here, as no invalid values should be
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# assigned to properties, even not before checkProperties
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for k,v in kwds.items():
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for k, v in kwds.items():
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self.setProperty(k, v)
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def __repr__(self):
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return '%s_%d(%s)' % (self.__class__.__name__, self.ctr, ',\n\t'.join(
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['%s=%r' % (k, self.properties.get(k, v.default)) for k, v in sorted(self.__class__.properties.items())]))
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def inherit(self, cls, owner):
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for base in owner.__bases__:
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if hasattr(base, self.name):
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aobj = getattr(base, 'accessibles', {}).get(self.name)
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if aobj:
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if not isinstance(aobj, cls):
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raise ProgrammingError('%s %s.%s can not inherit from a %s' %
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(cls.__name__, owner.__name__, self.name, aobj.__class__.__name__))
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# inherit from aobj
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for pname, value in aobj.propertyValues.items():
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if pname not in self.propertyValues:
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self.propertyValues[pname] = value
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break
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def as_dict(self):
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return self.propertyValues
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def override(self, value=UNSET, **kwds):
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"""return a copy, overridden by a bare attribute
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and/or some properties"""
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raise NotImplementedError
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def copy(self):
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# return a copy of ourselfs
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props = dict(self.properties, ctr=self.ctr)
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# deep copy, as datatype might be altered from config
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props['datatype'] = props['datatype'].copy()
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return type(self)(**props)
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"""return a (deep) copy of ourselfs"""
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raise NotImplementedError
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def for_export(self):
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"""prepare for serialisation"""
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return self.exportProperties()
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raise NotImplementedError
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def __repr__(self):
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props = []
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for k, prop in sorted(self.propertyDict.items()):
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v = self.propertyValues.get(k, prop.default)
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if v != prop.default:
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props.append('%s=%r' % (k, v))
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return '%s(%s)' % (self.__class__.__name__, ', '.join(props))
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class Parameter(Accessible):
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"""storage for parameter settings + value + qualifiers"""
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# poll: meaning for the basicPoller:
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# - True or 1 (poll this every pollinterval)
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# - positive int (poll every N(th) pollinterval)
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# - negative int (normally poll every N(th) pollinterval, if module is busy, poll every pollinterval)
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# note: Drivable (and derived classes) poll with 10 fold frequency if module is busy....
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"""defines a parameter
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properties = {
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'description': Property('mandatory description of the parameter', TextType(),
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extname='description', mandatory=True),
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'datatype': Property('datatype of the Parameter (SECoP datainfo)', DataTypeType(),
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extname='datainfo', mandatory=True),
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'readonly': Property('not changeable via SECoP (default True)', BoolType(),
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extname='readonly', mandatory=True),
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'group': Property('optional parameter group this parameter belongs to', StringType(),
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extname='group', default=''),
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'visibility': Property('optional visibility hint', EnumType('visibility', user=1, advanced=2, expert=3),
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extname='visibility', default=1),
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'constant': Property('optional constant value for constant parameters', ValueType(),
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extname='constant', default=None, mandatory=False),
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'default': Property('[internal] default (startup) value of this parameter '
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'if it can not be read from the hardware.',
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ValueType(), export=False, default=None, mandatory=False),
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'export': Property('''
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[internal] export settings
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* False: not accessible via SECoP.
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* True: exported, name automatic.
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* a string: exported with custom name''',
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OrType(BoolType(), StringType()), export=False, default=True),
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'poll': Property('''
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[internal] polling indicator
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may be:
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* None (omitted): will be converted to True/False if handler is/is not None
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* False or 0 (never poll this parameter)
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* True or 1 (AUTO), converted to SLOW (readonly=False)
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DYNAMIC (*status* and *value*) or REGULAR (else)
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* 2 (SLOW), polled with lower priority and a multiple of pollinterval
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* 3 (REGULAR), polled with pollperiod
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* 4 (DYNAMIC), if BUSY, with a fraction of pollinterval,
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else polled with pollperiod
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''',
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NoneOr(IntRange()), export=False, default=None),
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'needscfg': Property('[internal] needs value in config', NoneOr(BoolType()), export=False, default=None),
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'optional': Property('[internal] is this parameter optional?', BoolType(), export=False,
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settable=False, default=False),
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'handler': Property('[internal] overload the standard read and write functions',
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ValueType(), export=False, default=None, mandatory=False, settable=False),
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'initwrite': Property('[internal] write this parameter on initialization'
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' (default None: write if given in config)',
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NoneOr(BoolType()), export=False, default=None, mandatory=False, settable=False),
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}
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:param description: description
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:param datatype: the datatype
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:param inherit: whether properties not given should be inherited
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:param kwds: optional properties
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"""
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# storage for Parameter settings + value + qualifiers
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def __init__(self, description, datatype, *, ctr=None, unit=None, **kwds):
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description = Property(
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'mandatory description of the parameter', TextType(),
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extname='description', mandatory=True)
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datatype = Property(
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'datatype of the Parameter (SECoP datainfo)', DataTypeType(),
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extname='datainfo', mandatory=True)
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readonly = Property(
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'not changeable via SECoP (default True)', BoolType(),
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extname='readonly', default=True, export='always')
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group = Property(
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'optional parameter group this parameter belongs to', StringType(),
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extname='group', default='')
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visibility = Property(
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'optional visibility hint', EnumType('visibility', user=1, advanced=2, expert=3),
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extname='visibility', default=1)
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constant = Property(
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'optional constant value for constant parameters', ValueType(),
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extname='constant', default=None)
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default = Property(
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'''[internal] default (startup) value of this parameter
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if ctr is not None:
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self.ctr = ctr
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if it can not be read from the hardware''', ValueType(),
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export=False, default=None)
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export = Property(
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'''[internal] export settings
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if not isinstance(datatype, DataType):
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if issubclass(datatype, DataType):
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# goodie: make an instance from a class (forgotten ()???)
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datatype = datatype()
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else:
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raise ProgrammingError(
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'datatype MUST be derived from class DataType!')
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* False: not accessible via SECoP.
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* True: exported, name automatic.
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* a string: exported with custom name''', OrType(BoolType(), StringType()),
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export=False, default=True)
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poll = Property(
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'''[internal] polling indicator
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kwds['description'] = cleandoc(description)
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kwds['datatype'] = datatype
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kwds['readonly'] = kwds.get('readonly', True) # for frappy optional, for SECoP mandatory
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if unit is not None: # for legacy code only
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datatype.setProperty('unit', unit)
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super(Parameter, self).__init__(**kwds)
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may be:
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if self.initwrite and self.readonly:
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raise ProgrammingError('can not have both readonly and initwrite!')
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* None (omitted): will be converted to True/False if handler is/is not None
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* False or 0 (never poll this parameter)
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* True or 1 (AUTO), converted to SLOW (readonly=False)
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DYNAMIC (*status* and *value*) or REGULAR (else)
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* 2 (SLOW), polled with lower priority and a multiple of pollinterval
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* 3 (REGULAR), polled with pollperiod
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* 4 (DYNAMIC), if BUSY, with a fraction of pollinterval,
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else polled with pollperiod
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''', NoneOr(IntRange()),
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export=False, default=None)
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needscfg = Property(
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'[internal] needs value in config', NoneOr(BoolType()),
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export=False, default=None)
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optional = Property(
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'[internal] is this parameter optional?', BoolType(),
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export=False, settable=False, default=False)
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handler = Property(
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'[internal] overload the standard read and write functions', ValueType(),
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export=False, default=None, settable=False)
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initwrite = Property(
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'''[internal] write this parameter on initialization
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if self.constant is not None:
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self.properties['readonly'] = True
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default None: write if given in config''', NoneOr(BoolType()),
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export=False, default=None, settable=False)
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# used on the instance copy only
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value = None
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timestamp = 0
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readerror = None
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def __init__(self, description=None, datatype=None, inherit=True, *, unit=None, constant=None, **kwds):
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super().__init__(**kwds)
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if datatype is not None:
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if not isinstance(datatype, DataType):
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if isinstance(datatype, type) and issubclass(datatype, DataType):
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# goodie: make an instance from a class (forgotten ()???)
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datatype = datatype()
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else:
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raise ProgrammingError(
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'datatype MUST be derived from class DataType!')
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self.datatype = datatype
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if 'default' in kwds:
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self.default = datatype(kwds['default'])
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if description is not None:
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self.description = inspect.cleandoc(description)
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# save for __set_name__
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self._inherit = inherit
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self._unit = unit # for legacy code only
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self._constant = constant
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def __get__(self, instance, owner):
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# not used yet
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if instance is None:
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return self
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return instance.parameters[self.name].value
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def __set__(self, obj, value):
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obj.announceUpdate(self.name, value)
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def __set_name__(self, owner, name):
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self.name = name
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if self._inherit:
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self.inherit(Parameter, owner)
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# check for completeness
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missing_properties = [pname for pname in ('description', 'datatype') if pname not in self.propertyValues]
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if missing_properties:
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raise ProgrammingError('Parameter %s.%s needs a %s' %
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(owner.__name__, name, ' and a '.join(missing_properties)))
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if self._unit is not None:
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self.datatype.setProperty('unit', self._unit)
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if self._constant is not None:
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constant = self.datatype(self._constant)
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# The value of the `constant` property should be the
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# serialised version of the constant, or unset
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constant = self.datatype(kwds['constant'])
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self.properties['constant'] = self.datatype.export_value(constant)
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self.constant = self.datatype.export_value(constant)
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self.readonly = True
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# internal caching: value and timestamp of last change...
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self.value = self.default
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self.timestamp = 0
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self.readerror = None # if not None, indicates that last read was not successful
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if 'default' in self.propertyValues:
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# fixes in case datatype has changed
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try:
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self.datatype(self.default)
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except BadValueError:
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# clear default, if it does not match datatype
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self.propertyValues.pop('default')
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if self.export is True:
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if isinstance(self, PREDEFINED_ACCESSIBLES.get(name, type(None))):
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self.export = name
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else:
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self.export = '_' + name
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def copy(self):
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# deep copy, as datatype might be altered from config
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res = Parameter()
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res.name = self.name
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res.init(self.propertyValues)
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res.datatype = res.datatype.copy()
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return res
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def override(self, value=UNSET, **kwds):
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res = self.copy()
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res.init(kwds)
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if value is not UNSET:
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res.value = res.datatype(value)
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return res
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def export_value(self):
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return self.datatype.export_value(self.value)
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def for_export(self):
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return dict(self.exportProperties(), readonly=self.readonly)
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def getProperties(self):
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"""get also properties of datatype"""
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superProp = super().getProperties().copy()
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superProp.update(self.datatype.getProperties())
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return superProp
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super_prop = super().getProperties().copy()
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super_prop.update(self.datatype.getProperties())
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return super_prop
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def setProperty(self, key, value):
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"""set also properties of datatype"""
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if key in self.__class__.properties:
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if key in self.propertyDict:
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super().setProperty(key, value)
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else:
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self.datatype.setProperty(key, value)
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@@ -179,158 +268,168 @@ class Parameter(Accessible):
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super().checkProperties()
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self.datatype.checkProperties()
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def for_export(self):
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"""prepare for serialisation
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readonly is mandatory for serialisation, but not for declaration in classes
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"""
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r = super().for_export()
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if 'readonly' not in r:
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r['readonly'] = self.__class__.properties['readonly'].default
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return r
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class UnusedClass:
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# do not derive anything from this!
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pass
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class Parameters(OrderedDict):
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"""class storage for Parameters"""
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def __init__(self, *args, **kwds):
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self.exported = {} # only for lookups!
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super(Parameters, self).__init__(*args, **kwds)
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def __setitem__(self, key, value):
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if value.export:
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if isinstance(value, PREDEFINED_ACCESSIBLES.get(key, UnusedClass)):
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value.properties['export'] = key
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else:
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value.properties['export'] = '_' + key
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self.exported[value.export] = key
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super(Parameters, self).__setitem__(key, value)
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def __getitem__(self, item):
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return super(Parameters, self).__getitem__(self.exported.get(item, item))
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class ParamValue:
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__slots__ = ['value', 'timestamp']
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def __init__(self, value, timestamp=0):
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self.value = value
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self.timestamp = timestamp
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class Commands(Parameters):
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"""class storage for Commands"""
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class Override(CountedObj):
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"""Stores the overrides to be applied to a Parameter or Command
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note: overrides are applied by the metaclass during class creating
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reorder=True: use position of Override instead of inherited for the order
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"""
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def __init__(self, description="", datatype=None, *, reorder=False, **kwds):
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super(Override, self).__init__()
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self.kwds = kwds
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self.reorder = reorder
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# allow to override description and datatype without keyword
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if description:
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self.kwds['description'] = cleandoc(description)
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if datatype is not None:
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self.kwds['datatype'] = datatype
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# for now, do not use the Override ctr
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# self.kwds['ctr'] = self.ctr
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def __repr__(self):
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return '%s_%d(%s)' % (self.__class__.__name__, self.ctr, ', '.join(
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['%s=%r' % (k, v) for k, v in sorted(self.kwds.items())]))
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||||
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def apply(self, obj):
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if isinstance(obj, Accessible):
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props = obj.properties.copy()
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props['datatype'] = props['datatype'].copy()
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||||
if isinstance(obj, Parameter):
|
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if 'constant' in self.kwds:
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constant = obj.datatype(self.kwds.pop('constant'))
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self.kwds['constant'] = obj.datatype.export_value(constant)
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self.kwds['readonly'] = True
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if 'datatype' in self.kwds and 'default' not in self.kwds:
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try:
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self.kwds['datatype'](obj.default)
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except BadValueError:
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||||
# clear default, if it does not match datatype
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props['default'] = None
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||||
props.update(self.kwds)
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if self.reorder:
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return type(obj)(**props)
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return type(obj)(ctr=self.ctr, **props)
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raise ProgrammingError(
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"Overrides can only be applied to Accessibles, %r is none!" % obj)
|
||||
|
||||
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||||
class Command(Accessible):
|
||||
"""storage for Commands settings (description + call signature...)
|
||||
"""decorator to turn a method into a command
|
||||
|
||||
:param argument: the datatype of the argument or None
|
||||
:param result: the datatype of the result or None
|
||||
:param inherit: whether properties not given should be inherited
|
||||
:param kwds: optional properties
|
||||
"""
|
||||
properties = {
|
||||
'description': Property('description of the command', TextType(),
|
||||
extname='description', export=True, mandatory=True),
|
||||
'group': Property('optional command group of the command.', StringType(),
|
||||
extname='group', export=True, default=''),
|
||||
'visibility': Property('optional visibility hint', EnumType('visibility', user=1, advanced=2, expert=3),
|
||||
extname='visibility', export=True, default=1),
|
||||
'export': Property('''
|
||||
[internal] export settings
|
||||
|
||||
- False: not accessible via SECoP.
|
||||
- True: exported, name automatic.
|
||||
- a string: exported with custom name''',
|
||||
OrType(BoolType(), StringType()), export=False, default=True),
|
||||
'optional': Property('[internal] is the command optional to implement? (vs. mandatory)',
|
||||
BoolType(), export=False, default=False, settable=False),
|
||||
'datatype': Property('[internal] datatype of the command, auto generated from \'argument\' and \'result\'',
|
||||
DataTypeType(), extname='datainfo', mandatory=True),
|
||||
'argument': Property('datatype of the argument to the command, or None.',
|
||||
NoneOr(DataTypeType()), export=False, mandatory=True),
|
||||
'result': Property('datatype of the result from the command, or None.',
|
||||
NoneOr(DataTypeType()), export=False, mandatory=True),
|
||||
}
|
||||
|
||||
def __init__(self, description, ctr=None, **kwds):
|
||||
kwds['description'] = cleandoc(description)
|
||||
kwds['datatype'] = CommandType(kwds.get('argument', None), kwds.get('result', None))
|
||||
super(Command, self).__init__(**kwds)
|
||||
if ctr is not None:
|
||||
self.ctr = ctr
|
||||
description = Property(
|
||||
'description of the Command', TextType(),
|
||||
extname='description', export=True, mandatory=True)
|
||||
group = Property(
|
||||
'optional command group of the command.', StringType(),
|
||||
extname='group', export=True, default='')
|
||||
visibility = Property(
|
||||
'optional visibility hint', EnumType('visibility', user=1, advanced=2, expert=3),
|
||||
extname='visibility', export=True, default=1)
|
||||
export = Property(
|
||||
'''[internal] export settings
|
||||
|
||||
@property
|
||||
def argument(self):
|
||||
return self.datatype.argument
|
||||
* False: not accessible via SECoP.
|
||||
* True: exported, name automatic.
|
||||
* a string: exported with custom name''', OrType(BoolType(), StringType()),
|
||||
export=False, default=True)
|
||||
optional = Property(
|
||||
'[internal] is the command optional to implement? (vs. mandatory)', BoolType(),
|
||||
export=False, default=False, settable=False)
|
||||
datatype = Property(
|
||||
"datatype of the command, auto generated from 'argument' and 'result'",
|
||||
DataTypeType(), extname='datainfo', export='always')
|
||||
argument = Property(
|
||||
'datatype of the argument to the command, or None', NoneOr(DataTypeType()),
|
||||
export=False, mandatory=True)
|
||||
result = Property(
|
||||
'datatype of the result from the command, or None', NoneOr(DataTypeType()),
|
||||
export=False, mandatory=True)
|
||||
|
||||
@property
|
||||
def result(self):
|
||||
return self.datatype.result
|
||||
func = None
|
||||
|
||||
def __init__(self, argument=False, *, result=None, inherit=True, **kwds):
|
||||
super().__init__(**kwds)
|
||||
if result or kwds or isinstance(argument, DataType) or not callable(argument):
|
||||
# normal case
|
||||
if argument is False and result:
|
||||
argument = None
|
||||
if argument is not False:
|
||||
if isinstance(argument, (tuple, list)):
|
||||
# goodie: treat as TupleOf
|
||||
argument = TupleOf(*argument)
|
||||
self.argument = argument
|
||||
self.result = result
|
||||
else:
|
||||
# goodie: allow @Command instead of @Command()
|
||||
self.func = argument # this is the wrapped method!
|
||||
if argument.__doc__:
|
||||
self.description = inspect.cleandoc(argument.__doc__)
|
||||
self.name = self.func.__name__
|
||||
self._inherit = inherit # save for __set_name__
|
||||
|
||||
def __set_name__(self, owner, name):
|
||||
self.name = name
|
||||
if self.func is None:
|
||||
raise ProgrammingError('Command %s.%s must be used as a method decorator' %
|
||||
(owner.__name__, name))
|
||||
if self._inherit:
|
||||
self.inherit(Command, owner)
|
||||
|
||||
self.datatype = CommandType(self.argument, self.result)
|
||||
if self.export is True:
|
||||
if isinstance(self, PREDEFINED_ACCESSIBLES.get(name, type(None))):
|
||||
self.export = name
|
||||
else:
|
||||
self.export = '_' + name
|
||||
|
||||
def __get__(self, obj, owner=None):
|
||||
if obj is None:
|
||||
return self
|
||||
if not self.func:
|
||||
raise ProgrammingError('Command %s not properly configured' % self.name)
|
||||
return self.func.__get__(obj, owner)
|
||||
|
||||
def __call__(self, func):
|
||||
if 'description' not in self.propertyValues and func.__doc__:
|
||||
self.description = inspect.cleandoc(func.__doc__)
|
||||
self.func = func
|
||||
return self
|
||||
|
||||
def copy(self):
|
||||
res = Command()
|
||||
res.name = self.name
|
||||
res.func = self.func
|
||||
res.init(self.propertyValues)
|
||||
if res.argument:
|
||||
res.argument = res.argument.copy()
|
||||
if res.result:
|
||||
res.result = res.result.copy()
|
||||
res.datatype = CommandType(res.argument, res.result)
|
||||
return res
|
||||
|
||||
def override(self, value=UNSET, **kwds):
|
||||
res = self.copy()
|
||||
res.init(kwds)
|
||||
if value is not UNSET:
|
||||
res.func = value
|
||||
return res
|
||||
|
||||
def do(self, module_obj, argument):
|
||||
"""perform function call
|
||||
|
||||
:param module_obj: the module on which the command is to be executed
|
||||
:param argument: the argument from the do command
|
||||
:returns: the return value converted to the result type
|
||||
|
||||
- when the argument type is TupleOf, the function is called with multiple arguments
|
||||
- when the argument type is StructOf, the function is called with keyworded arguments
|
||||
- the validity of the argument/s is/are checked
|
||||
"""
|
||||
func = self.__get__(module_obj)
|
||||
if self.argument:
|
||||
# validate
|
||||
argument = self.argument(argument)
|
||||
if isinstance(self.argument, TupleOf):
|
||||
res = func(*argument)
|
||||
elif isinstance(self.argument, StructOf):
|
||||
res = func(**argument)
|
||||
else:
|
||||
res = func(argument)
|
||||
else:
|
||||
if argument is not None:
|
||||
raise BadValueError('%s.%s takes no arguments' % (module_obj.__class__.__name__, self.name))
|
||||
res = func()
|
||||
if self.result:
|
||||
return self.result(res)
|
||||
return None # silently ignore the result from the method
|
||||
|
||||
def for_export(self):
|
||||
return self.exportProperties()
|
||||
|
||||
def __repr__(self):
|
||||
result = super().__repr__()
|
||||
return result[:-1] + ', %r)' % self.func if self.func else result
|
||||
|
||||
|
||||
# list of predefined accessibles with their type
|
||||
PREDEFINED_ACCESSIBLES = dict(
|
||||
value = Parameter,
|
||||
status = Parameter,
|
||||
target = Parameter,
|
||||
pollinterval = Parameter,
|
||||
ramp = Parameter,
|
||||
user_ramp = Parameter,
|
||||
setpoint = Parameter,
|
||||
time_to_target = Parameter,
|
||||
unit = Parameter, # reserved name
|
||||
loglevel = Parameter, # reserved name
|
||||
mode = Parameter, # reserved name
|
||||
stop = Command,
|
||||
reset = Command,
|
||||
go = Command,
|
||||
abort = Command,
|
||||
shutdown = Command,
|
||||
communicate = Command,
|
||||
value=Parameter,
|
||||
status=Parameter,
|
||||
target=Parameter,
|
||||
pollinterval=Parameter,
|
||||
ramp=Parameter,
|
||||
user_ramp=Parameter,
|
||||
setpoint=Parameter,
|
||||
time_to_target=Parameter,
|
||||
unit=Parameter, # reserved name
|
||||
loglevel=Parameter, # reserved name
|
||||
mode=Parameter, # reserved name
|
||||
stop=Command,
|
||||
reset=Command,
|
||||
go=Command,
|
||||
abort=Command,
|
||||
shutdown=Command,
|
||||
communicate=Command,
|
||||
)
|
||||
|
||||
Reference in New Issue
Block a user