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#!/usr/bin/env python
"""Epics transform record"""
from .. import Device
class Transform(Device):
"Epics transfrom record"
attr_fmts = {'Value': '%s',
'Input': 'INP%s',
'Input_Valid': 'I%sV',
'Expression': 'CLC%s',
'Output': 'OUT%s',
'Output_Valid': 'O%sV',
'Comment': 'CMT%s',
'Expression_Valid': 'C%sV',
'Previous_Value': 'L%s'}
rows = 'ABCDEFGHIJKLMNOP'
def __init__(self, prefix, **kwargs):
if prefix.endswith('.'):
prefix = prefix[:-1]
self.attrs = ['COPT', 'PREC']
for fmt in self.attr_fmts.values():
for let in self.rows:
self.attrs.append(fmt % let)
Device.__init__(self, prefix, delim='.',
attrs=self.attrs, **kwargs)
def __validrow(self, row):
return (isinstance(row, (str, unicode)) and
len(row)==1 and row in self.rows)
def get_row(self, row='A'):
"""get full data for a calculation 'row' (or letter):
returns dictionary with keywords (and PV suffix for row='B'):
'Value': B
'Input': INPB
'Input_Valid': IBV
'Expression': CLCB
'Output': OUTB
'Output_Valid': OBV
'Comment': CMTB
'Expression_Valid': CBV
'Previous_Value': LB
"""
if not self.__validrow(row):
return None
dat = {}
for label, fmt in self.attr_fmts.items():
dat[label] = self._pvs[fmt % row].get()
return dat
def set_row(self, row='A', data=None):
"""set full data for a calculation 'row' (or letter):
data should be a dictionary as returned from get_row()
"""
if not self.__validrow(row):
return None
for key, value in data.items():
if key in self.attr_fmts:
attr = self.attr_fmts[key] % row
if self._pvs[attr].write_access:
self._pvs[attr].put(value)
def set_calc(self, row='A', calc=''):
"""set calc for a 'row' (or letter):
calc should be a string"""
if not self.__validrow(row):
return None
self._pvs[self.attr_fmts['Expression'] % row].put(calc)
def set_comment(self, row='A', comment=''):
"""set comment for a 'row' (or letter):
comment should be a string"""
if not self.__validrow(row):
return None
self._pvs[self.attr_fmts['Comment'] % row].put(calc)
def set_input(self, row='A', input=''):
"""set input PV for a 'row' (or letter):
input should be a string"""
if not self.__validrow(row):
return None
self._pvs[self.attr_fmts['Input'] % row].put(calc)
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