:ref:`adapt-life-cycle` for more information about how these objects
are used by Psycopg,

This class is a formal `~typing.Protocol`. A partial implementation of
this protocol (implementing everything except the `dump()` method) is
available as `psycopg.adapt.Dumper`.

:param cls: The type that will be managed by this dumper.
:type cls: type
:param context: The context where the transformation is performed. If not
    specified the conversion might be inaccurate, for instance it will not
    be possible to know the connection encoding or the server date format.
:type context: `AdaptContext` or None

.. autoattribute:: format

.. automethod:: dump

    The format returned by dump shouldn't contain quotes or escaped
    values.

    .. versionchanged:: 3.2

        `!dump()` can also return `!None`, to represent a :sql:`NULL` in
        the database.

.. automethod:: quote

    .. tip::

        This method will be used by `~psycopg.sql.Literal` to convert a
        value client-side.

    This method only makes sense for text dumpers; the result of calling
    it on a binary dumper is undefined. It might scratch your car, or burn
    your cake. Don't tell me I didn't warn you.

.. autoattribute:: oid

    If the OID is not specified, PostgreSQL will try to infer the type
    from the context, but this may fail in some contexts and may require a
    cast (e.g. specifying :samp:`%s::{type}` for its placeholder).

    You can use the `psycopg.adapters`\ ``.``\
    `~psycopg.adapt.AdaptersMap.types` registry to find the OID of builtin
    types, and you can use `~psycopg.types.TypeInfo` to extend the
    registry to custom types.

.. automethod:: get_key
.. automethod:: upgrade

This class is a formal `~typing.Protocol`. A partial implementation of this
protocol (implementing everything except the `load()` method) is available
as `psycopg.adapt.Loader`.

:param oid: The type that will be managed by this dumper.
:type oid: int
:param context: The context where the transformation is performed. If not
    specified the conversion might be inaccurate, for instance it will not
    be possible to know the connection encoding or the server date format.
:type context: `AdaptContext` or None

.. autoattribute:: format

.. automethod:: load

.. seealso:: :ref:`adaptation` for an explanation about how contexts are
    connected.