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raise NoConverterFoundForObjectType.create(conversion_finder,
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attr_value,
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desired_attr_type)
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else:
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# we can safely use the value: it is already of the correct type
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return attr_value"
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511,"def register_converter(self, converter: Converter[S, T]):
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""""""
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Utility method to register any converter. Converters that support any type will be stored in the ""generic""
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lists, and the others will be stored in front of the types they support
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:return:
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""""""
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check_var(converter, var_types=Converter, var_name='converter')
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# (0) sanity check : check that parser handles jokers properly
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res = converter.is_able_to_convert_detailed(from_type=JOKER, to_type=JOKER, strict=True)
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if not (res[0] is True and res[1] is None and res[2] is None):
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raise ValueError('Converter ' + str(converter) + ' can not be registered since it does not handle the JOKER'
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' cases correctly')
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# compute all possible chains and save them
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generic_chains, generic_nonstrict_chains, specific_chains, specific_nonstrict_chains \
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= self._create_all_new_chains(converter)
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self._generic_nonstrict_conversion_chains += generic_nonstrict_chains
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self._generic_conversion_chains += generic_chains
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self._specific_non_strict_conversion_chains += specific_nonstrict_chains
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self._specific_conversion_chains += specific_chains
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# sort all lists by length
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self._generic_nonstrict_conversion_chains = sorted(self._generic_nonstrict_conversion_chains, key=len,
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reverse=True)
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self._generic_conversion_chains = sorted(self._generic_conversion_chains, key=len, reverse=True)
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self._specific_non_strict_conversion_chains = sorted(self._specific_non_strict_conversion_chains, key=len,
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reverse=True)
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self._specific_conversion_chains = sorted(self._specific_conversion_chains, key=len, reverse=True)"
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512,"def _create_all_new_chains(self, converter) -> Tuple[List[Converter], List[Converter],
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List[Converter], List[Converter]]:
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""""""
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Creates all specific and generic chains that may be built by adding this converter to the existing chains.
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:param converter:
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:return: generic_chains, generic_nonstrict_chains, specific_chains, specific_nonstrict_chains
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""""""
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specific_chains, specific_nonstrict_chains, generic_chains, generic_nonstrict_chains = [], [], [], []
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if converter.is_generic():
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# the smaller chain : the singleton :)
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generic_chains.append(ConversionChain(initial_converters=[converter], strict_chaining=True))
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else:
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specific_chains.append(ConversionChain(initial_converters=[converter], strict_chaining=True))
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# 1) create new specific chains by adding this converter at the beginning or end of all *non-generic* ones
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# -- non-strict
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new_c_at_end_ns = []
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new_c_at_beginning_ns = []
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if not self.strict:
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# then there are non-strict chains already. Try to connect to them
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for existing_specific_nonstrict in self._specific_non_strict_conversion_chains:
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if converter.can_be_appended_to(existing_specific_nonstrict, strict=False):
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if ConversionChain.are_worth_chaining(existing_specific_nonstrict, converter):
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new_c_at_end_ns.append(ConversionChain.chain(existing_specific_nonstrict, converter,
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strict=False))
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if existing_specific_nonstrict.can_be_appended_to(converter, strict=False):
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if ConversionChain.are_worth_chaining(converter, existing_specific_nonstrict):
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new_c_at_beginning_ns.append(ConversionChain.chain(converter, existing_specific_nonstrict,
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strict=False))
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# -- strict
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new_c_at_end = []
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new_c_at_beginning = []
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for existing_specific in self._specific_conversion_chains:
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# first try *strict* mode
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if converter.can_be_appended_to(existing_specific, strict=True):
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if ConversionChain.are_worth_chaining(existing_specific, converter):
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new_c_at_end.append(ConversionChain.chain(existing_specific, converter, strict=True))
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elif (not self.strict) and converter.can_be_appended_to(existing_specific, strict=False):
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if ConversionChain.are_worth_chaining(existing_specific, converter):
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new_c_at_end_ns.append(ConversionChain.chain(existing_specific, converter, strict=False))
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if existing_specific.can_be_appended_to(converter, strict=True):
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if ConversionChain.are_worth_chaining(converter, existing_specific):
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# TODO this is where when chaining a generic to a specific, we would actually have to restrict it
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# note: but maybe we dont care since now this is checked and prevented in the convert() method
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new_c_at_beginning.append(ConversionChain.chain(converter, existing_specific, strict=True))
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elif (not self.strict) and existing_specific.can_be_appended_to(converter, strict=False):
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if ConversionChain.are_worth_chaining(converter, existing_specific):
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# TODO this is where when chaining a generic to a specific, we would actually have to restrict it
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# note: but maybe we dont care since now this is checked and prevented in the convert() method
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new_c_at_beginning_ns.append(ConversionChain.chain(converter, existing_specific, strict=False))
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# append to the right list depending on the nature of this converter
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if converter.is_generic():
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generic_chains += new_c_at_end
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generic_nonstrict_chains += new_c_at_end_ns
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else:
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specific_chains += new_c_at_end
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specific_nonstrict_chains += new_c_at_end_ns
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# common for both types
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