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#!/usr/bin/python
# Copyright 2011 Google Inc. All Rights Reserved.
class Field(object):
"""Class representing a Field in an experiment file."""
def __init__(self, name, required, default, inheritable, description):
self.name = name
self.required = required
self.assigned = False
self.default = default
self._value = default
self.inheritable = inheritable
self.description = description
def Set(self, value, parse=True):
if parse:
self._value = self._Parse(value)
else:
self._value = value
self.assigned = True
def Append(self, value):
self._value += self._Parse(value)
self.assigned = True
def _Parse(self, value):
return value
def Get(self):
return self._value
def GetString(self):
return str(self._value)
class TextField(Field):
def __init__(self, name, required=False, default="", inheritable=False,
description=""):
super(TextField, self).__init__(name, required, default, inheritable,
description)
def _Parse(self, value):
return str(value)
class BooleanField(Field):
def __init__(self, name, required=False, default=False, inheritable=False,
description=""):
super(BooleanField, self).__init__(name, required, default, inheritable,
description)
def _Parse(self, value):
if value.lower() == "true":
return True
elif value.lower() == "false":
return False
raise Exception("Invalid value for '%s'. Must be true or false." %
self.name)
class IntegerField(Field):
def __init__(self, name, required=False, default=0, inheritable=False,
description=""):
super(IntegerField, self).__init__(name, required, default, inheritable,
description)
def _Parse(self, value):
return int(value)
class FloatField(Field):
def __init__(self, name, required=False, default=0, inheritable=False,
description=""):
super(FloatField, self).__init__(name, required, default, inheritable,
description)
def _Parse(self, value):
return float(value)
class ListField(Field):
def __init__(self, name, required=False, default=[], inheritable=False,
description=""):
super(ListField, self).__init__(name, required, default, inheritable,
description)
def _Parse(self, value):
return value.split()
def GetString(self):
return " ".join(self._value)
class EnumField(Field):
def __init__(self, name, options, required=False, default="",
inheritable=False, description=""):
super(EnumField, self).__init__(name, required, default, inheritable,
description)
self.options = options
def _Parse(self, value):
if value not in self.options:
raise Exception("Invalid enum value for field '%s'. Must be one of (%s)"
% (self.name, ", ".join(self.options)))
return str(value)
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