| Ahmad Sharif | 0dcbc4b | 2012-02-02 16:37:18 -0800 | [diff] [blame] | 1 | #!/usr/bin/python |
| 2 | |
| 3 | # Copyright 2011 Google Inc. All Rights Reserved. |
| 4 | |
| 5 | |
| 6 | class Field(object): |
| 7 | """Class representing a Field in an experiment file.""" |
| 8 | |
| 9 | def __init__(self, name, required, default, inheritable, description): |
| 10 | self.name = name |
| 11 | self.required = required |
| 12 | self.assigned = False |
| 13 | self.default = default |
| 14 | self._value = default |
| 15 | self.inheritable = inheritable |
| 16 | self.description = description |
| 17 | |
| 18 | def Set(self, value, parse=True): |
| 19 | if parse: |
| 20 | self._value = self._Parse(value) |
| 21 | else: |
| 22 | self._value = value |
| 23 | self.assigned = True |
| 24 | |
| 25 | def Append(self, value): |
| 26 | self._value += self._Parse(value) |
| 27 | self.assigned = True |
| 28 | |
| 29 | def _Parse(self, value): |
| 30 | return value |
| 31 | |
| 32 | def Get(self): |
| 33 | return self._value |
| 34 | |
| 35 | def GetString(self): |
| 36 | return str(self._value) |
| 37 | |
| 38 | |
| 39 | class TextField(Field): |
| 40 | def __init__(self, name, required=False, default="", inheritable=False, |
| 41 | description=""): |
| 42 | super(TextField, self).__init__(name, required, default, inheritable, |
| 43 | description) |
| 44 | |
| 45 | def _Parse(self, value): |
| 46 | return str(value) |
| 47 | |
| 48 | |
| 49 | class BooleanField(Field): |
| 50 | def __init__(self, name, required=False, default=False, inheritable=False, |
| 51 | description=""): |
| 52 | super(BooleanField, self).__init__(name, required, default, inheritable, |
| 53 | description) |
| 54 | |
| 55 | def _Parse(self, value): |
| 56 | if value.lower() == "true": |
| 57 | return True |
| 58 | elif value.lower() == "false": |
| 59 | return False |
| 60 | raise Exception("Invalid value for '%s'. Must be true or false." % |
| 61 | self.name) |
| 62 | |
| 63 | |
| 64 | class IntegerField(Field): |
| 65 | def __init__(self, name, required=False, default=0, inheritable=False, |
| 66 | description=""): |
| 67 | super(IntegerField, self).__init__(name, required, default, inheritable, |
| 68 | description) |
| 69 | |
| 70 | def _Parse(self, value): |
| 71 | return int(value) |
| 72 | |
| 73 | |
| 74 | class FloatField(Field): |
| 75 | def __init__(self, name, required=False, default=0, inheritable=False, |
| 76 | description=""): |
| 77 | super(FloatField, self).__init__(name, required, default, inheritable, |
| 78 | description) |
| 79 | |
| 80 | def _Parse(self, value): |
| 81 | return float(value) |
| 82 | |
| 83 | |
| 84 | class ListField(Field): |
| 85 | def __init__(self, name, required=False, default=[], inheritable=False, |
| 86 | description=""): |
| 87 | super(ListField, self).__init__(name, required, default, inheritable, |
| 88 | description) |
| 89 | |
| 90 | def _Parse(self, value): |
| 91 | return value.split() |
| 92 | |
| 93 | def GetString(self): |
| 94 | return " ".join(self._value) |
| 95 | |
| 96 | |
| 97 | class EnumField(Field): |
| 98 | def __init__(self, name, options, required=False, default="", |
| 99 | inheritable=False, description=""): |
| 100 | super(EnumField, self).__init__(name, required, default, inheritable, |
| 101 | description) |
| 102 | self.options = options |
| 103 | |
| 104 | def _Parse(self, value): |
| 105 | if value not in self.options: |
| 106 | raise Exception("Invalid enum value for field '%s'. Must be one of (%s)" |
| 107 | % (self.name, ", ".join(self.options))) |
| 108 | return str(value) |