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Re: [nosql-dev] The right way to get DefaultDocumentEntityConverter instance.
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Hi Otavio,
Yes, I read the spec. :-) The question was that usage of SPI for
the polymorphism purpose is incorrect from design point of view.
IMO SPI is for the extending a common purpose types, for instance
I use java.time.Period reader (and hope all JAXB types will be
included in jnosql).
On the other hand on the "mapping layer", the only way to add a
converter via annotation is the @converter (sorry for the
tautology).
My question is about is there any way to deserialize the instance
programmatically (like JsonbBuilder.create().fromJson(reader,
MyClass.class)).
Ideally, would be to get a current DefaultDocumentEntityConverter.
Does it make sense?
Dmitry
On 4/29/2022 10:04 AM, Otavio Santana
wrote:
Hey, how are you?
Indeed we have two ways.
It is because Jakarta NoSQL has two layers: communication and
mapping.
In the communication layer, you have the option of using SPI to
teach a custom type:
https://www.jnosql.org/spec/#_make_custom_writer_and_reader
Therefore, the communication will convert the type in the
database layer.
In the mapping it follows the same idea around the JPA
converter:
https://www.jnosql.org/spec/#_convert
Please, let me know if it helps.
If not, please, don't hesitate to ask questions and give
feedback as much as possible.
Suppose it is not clear, excellent! We can improve our
documentation as well.
Does it help you?
Thank you for your participation here.
Hello,
The @Convert(AttributeConverter.class) is a simple way to
provide custom
serialization / deserialization mechanism similar to the
JsonbAdapter.
Unfortunately, unlike JSON-B, Jakarta NoSQL has no custom
Serializers
/Deserializers support. Deserializers in JSON-B are more
useful for the
polymorphism, because they provide the context so I can
deserialize the
object of choice easily once I decide on the type.
What is the correct way to to this from the custom converter
class?
May I have an access to the DefaultDocumentEntityConverter?
Kind regards,
Dmitry
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