62 lines
1.2 KiB
Python
62 lines
1.2 KiB
Python
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from abc import ABC, abstractmethod
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class Converter(ABC):
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@abstractmethod
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def convert_to_form(self, value):
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pass
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@abstractmethod
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def convert_from_form(self, value):
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pass
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class NullConverter(Converter):
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def convert_to_form(self, value):
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return value
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def convert_from_form(self, value):
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return value
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class OptionalConverter(Converter):
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"""
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Maps None to an empty string, and reverse
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useful for optional fields
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"""
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def convert_to_form(self, value):
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return "" if value is None else value
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def convert_from_form(self, value):
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return value if value else None
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class IntConverter(Converter):
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def convert_to_form(self, value):
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return str(value)
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def convert_from_form(self, value):
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return int(value)
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class FloatConverter(Converter):
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def convert_to_form(self, value):
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return str(value)
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def convert_from_form(self, value):
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return float(value)
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class EnumConverter(Converter):
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def __init__(self, enumCls):
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self.enumCls = enumCls
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def convert_to_form(self, value):
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return None if value is None else self.enumCls(value).name
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def convert_from_form(self, value):
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return self.enumCls[value].value
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