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Current File : /lib/python3/dist-packages/josepy/__pycache__/interfaces.cpython-310.pyc
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h9Ra��@sVdZddlZddlZddlmZddlmZddlmZm	Z	Gdd�de
ejd�ZdS)	zJOSE interfaces.�N��Any)�errors)�Sequence�Mappingc@s�eZdZdZejdefdd��Zdefdd�Ze	ejdeddfdd	���Z
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defdd�Ze	dddefdd��ZdS)�JSONDeSerializablea�Interface for (de)serializable JSON objects.

    Please recall, that standard Python library implements
    :class:`json.JSONEncoder` and :class:`json.JSONDecoder` that perform
    translations based on respective :ref:`conversion tables
    <conversion-table>` that look pretty much like the one below (for
    complete tables see relevant Python documentation):

    .. _conversion-table:

    ======  ======
     JSON   Python
    ======  ======
    object  dict
    ...     ...
    ======  ======

    While the above **conversion table** is about translation of JSON
    documents to/from the basic Python types only,
    :class:`JSONDeSerializable` introduces the following two concepts:

      serialization
        Turning an arbitrary Python object into Python object that can
        be encoded into a JSON document. **Full serialization** produces
        a Python object composed of only basic types as required by the
        :ref:`conversion table <conversion-table>`. **Partial
        serialization** (accomplished by :meth:`to_partial_json`)
        produces a Python object that might also be built from other
        :class:`JSONDeSerializable` objects.

      deserialization
        Turning a decoded Python object (necessarily one of the basic
        types as required by the :ref:`conversion table
        <conversion-table>`) into an arbitrary Python object.

    Serialization produces **serialized object** ("partially serialized
    object" or "fully serialized object" for partial and full
    serialization respectively) and deserialization produces
    **deserialized object**, both usually denoted in the source code as
    ``jobj``.

    Wording in the official Python documentation might be confusing
    after reading the above, but in the light of those definitions, one
    can view :meth:`json.JSONDecoder.decode` as decoder and
    deserializer of basic types, :meth:`json.JSONEncoder.default` as
    serializer of basic types, :meth:`json.JSONEncoder.encode`  as
    serializer and encoder of basic types.

    One could extend :mod:`json` to support arbitrary object
    (de)serialization either by:

      - overriding :meth:`json.JSONDecoder.decode` and
        :meth:`json.JSONEncoder.default` in subclasses

      - or passing ``object_hook`` argument (or ``object_hook_pairs``)
        to :func:`json.load`/:func:`json.loads` or ``default`` argument
        for :func:`json.dump`/:func:`json.dumps`.

    Interestingly, ``default`` is required to perform only partial
    serialization, as :func:`json.dumps` applies ``default``
    recursively. This is the idea behind making :meth:`to_partial_json`
    produce only partial serialization, while providing custom
    :meth:`json_dumps` that dumps with ``default`` set to
    :meth:`json_dump_default`.

    To make further documentation a bit more concrete, please, consider
    the following imaginatory implementation example::

      class Foo(JSONDeSerializable):
          def to_partial_json(self):
              return 'foo'

          @classmethod
          def from_json(cls, jobj):
              return Foo()

      class Bar(JSONDeSerializable):
          def to_partial_json(self):
              return [Foo(), Foo()]

          @classmethod
          def from_json(cls, jobj):
              return Bar()

    �returncCst��)a�Partially serialize.

        Following the example, **partial serialization** means the following::

          assert isinstance(Bar().to_partial_json()[0], Foo)
          assert isinstance(Bar().to_partial_json()[1], Foo)

          # in particular...
          assert Bar().to_partial_json() != ['foo', 'foo']

        :raises josepy.errors.SerializationError:
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        :returns: Partially serializable object.

        )�NotImplementedError��self�r�3/usr/lib/python3/dist-packages/josepy/interfaces.py�to_partial_jsonf�z"JSONDeSerializable.to_partial_jsoncsdtdtf�fdd���|�S)aDFully serialize.

        Again, following the example from before, **full serialization**
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          assert Bar().to_json() == ['foo', 'foo']

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        :returns: Fully serialized object.

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zJSONDeSerializable.json_loads�kwargscKstj|fd|ji|��S)zsDump to JSON string using proper serializer.

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        Please read the class docstring for more information.

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