Hi Xavier,
Think you are right, have to admit I always use adapters so didn't spot
this one:
public static class UUIDAdapter implements JsonbAdapter<UUID, String> {
@Override
public String adaptToJson(UUID obj) throws Exception {
return obj.toString();
}
@Override
public UUID adaptFromJson(String obj) throws Exception {
return UUID.fromString(obj);
}
}
Will have a quick look this afternoon. The only tests we have for
serializers are to serialize another object which works but map an object
to a primitive is not supported for now.
Romain Manni-Bucau
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Le mar. 2 avr. 2019 à 13:50, Xavier Dury <kal...@hotmail.com> a écrit :
> Hi,
>
> When trying the following code on Johnzon 1.1.12-SNAPSHOT:
>
> public class UUIDSerializer implements JsonbSerializer<UUID> {
> public void serialize(UUID obj, JsonGenerator generator,
> SerializationContext ctx) {
> generator.flush();
> System.out.println("!!!");
> generator.write(obj.toString());
> }
> }
>
> public class UUIDHolder {
> @JsonbTypeSerializer(UUIDSerializer.class)
> public UUID uuid = UUID.randomUUID();
> }
>
> JsonbBuilder.create().toJson(new UUIDHolder(), System.out);
>
> I get the following printed on System.out:
>
> {"uuid":{!!!
>
> and an exception:
>
> javax.json.stream.JsonGenerationException: write(param) is only valid in
> arrays
> at
> org.apache.johnzon.core.JsonGeneratorImpl.checkArray(JsonGeneratorImpl.java:623)
> at
> org.apache.johnzon.core.JsonGeneratorImpl.write(JsonGeneratorImpl.java:384)
> at
> org.apache.johnzon.jsonb.SerializerTest$ConcreteSerializer.serialize(SerializerTest.java:249)
> at
> org.apache.johnzon.jsonb.SerializerTest$ConcreteSerializer.serialize(SerializerTest.java:1)
> at
> org.apache.johnzon.jsonb.JsonbAccessMode$WriterConverters.lambda$0(JsonbAccessMode.java:793)
> at
> org.apache.johnzon.mapper.MappingGeneratorImpl.writeValue(MappingGeneratorImpl.java:381)
>
> This looks kinda strange to me because, it seems that Johnzon tries to
> start a new object (hence the opening bracket in the output in front of the
> '!!!') before it passes control to the serializer. Why does Johnzon do
> that? The serializer could decide that the object could be stored as an
> object ({}), an array ([]) or a primitive value.
>
> Should I report an issue or am I doing something wrong?
>
> Regards,
> Xavier
>
