| Re: [nosql-dev] Polymorthism help needed. |
Hi Otavio!
I'll take a look on the Convert... I used org.eclipse.jnosql.communication.ValueReader service.
Have a good holidays!
D.
Hey, sorry for the late reply.
I will be at home for a while, until August, after the conference season ends.
If you wish to do it manually, I believe the Convert annotation fits better.
I will work in a PoC on this.
On Thu, Jun 27, 2024 at 11:33 AM Dmitry Repchevsky <redmitry@xxxxxxx> wrote:
Hi Otavio!
The principal problem is that standard JSONB / JPA / JNoSQL polymorphism is not enough for some JSON schemas.
When I have "oneOf": [], the spec. says that json must match at most one schema.In my particular case I have a MeasurementValueEntity and ComplexValueEntity, OntologyTermValueEntity and QuantityEntity that inherit from it.
So basically I'd like to catch MeasurementValueEntity with MeasurementValueReader, manually decide which of three types should be instantiated and
return it. I just see no API to do this. Something like in JAXB: jsonb.fromJson(value, OntologyTermValueEntity.class);
I mean - I have Object value and know the Entity class and want create the Entity object.
Kind regards,
Dmitry
On 6/27/2024 10:00 AM, Otavio Santana wrote:
Hey Dmitry, how are you?
We are doing well and thanks for all support and feedback, you are a great contributor!
About having not discriminator value, could you create a scenario?
This way, we can work together on this solution.
On Wed, Jun 26, 2024 at 11:24 AM Dmitry Repchevsky via nosql-dev <nosql-dev@xxxxxxxxxxx> wrote:
Hi all,
Great to see that spec. and implementation is moving forward.
Especially that annotations are moving to the spec.:
org.eclipse.jnosql.mapping.Inheritance -> jakarta.nosql.Inheritance
Nevertheless, I have a trouble with custom inheritance with 1.1 using
ValueReader.
The implementation has changed (was Document and its an Element now).
Is there an elegant way to implement the inheritance when I have no
discriminator field?
public class MeasurementValueReader implements ValueReader {
@Override
public <T> T read(Class<T> clazz, Object value) {
if (List.class.isInstance(value)) {
final List list = List.class.cast(value);
if (list.stream().filter(Entry.class::isInstance)
.anyMatch(e -> "unit".equals(((Entry)e).name()))) {
return (QuantityEntity) ???;
}
}
How may I manually convert Object value into the concrete
(QuantityEntity) type (I catch the "Measurement" interface).
Thank you in advance,
Dmitry
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