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"""
PRIVATE MODULE: do not import (from) it directly.
This module contains functionality for loading stuff from json.
"""
from typing import Type, List, Any, Dict, Callable
from jsons._common_impl import T
from jsons._dump_impl import dump
from jsons._load_impl import load
def transform(
obj: object,
cls: Type[T],
*,
mapper: Callable[[Dict[str, Any]], Dict[str, Any]] = None,
dump_cls: type = None,
dump_args: List[Any] = None,
dump_kwargs: List[Dict[str, Any]] = None,
**kwargs) -> T:
"""
Transform the given ``obj`` to an instance of ``cls``.
:param obj: the object that is to be transformed into a type of ``cls``.
:param cls: the type that ``obj`` is to be transformed into.
:param mapper: a callable that takes the dumped dict and returns a mapped
dict right before it is loaded into ``cls``.
:param dump_cls: the ``cls`` parameter that is given to ``dump``.
:param dump_args: the ``args`` parameter that is given to ``dump``.
:param dump_kwargs: the ``kwargs`` parameter that is given to ``dump``.
:param kwargs: any keyword arguments that are given to ``load``.
:return: an instance of ``cls``.
"""
dump_args_ = dump_args or []
dump_kwargs_ = dump_kwargs or {}
dumped = dump(obj, dump_cls, *dump_args_, **dump_kwargs_)
mapper_ = mapper or (lambda x: x)
dumped_mapped = mapper_(dumped)
return load(dumped_mapped, cls, **kwargs)