Lombok + Jackson + Inheritance + Immutables deserialization error

[Daniel]

Hey,

I'm trying Lombok for the first time and I'm very happy. Thanks for saving my precious time! :)

I do have one problem though, I can't figure out how to annotate this properly:

- both classes should have builder

- all fields should be final

@Data

@AllArgsConstructor
@EqualsAndHashCode

public class Coordinate {

    protected final String id;

    protected final Double x;

    protected final Double y;

}

@Data

@EqualsAndHashCode(callSuper = true)

public class RoutableCoordinate extends Coordinate {

    @JsonProperty("routingSpec")

    private final RoutingSpecification routingSpecification;

    @Builder

    public RoutableCoordinate(String id, Double x, Double y, RoutingSpecification routingSpecification) {

        super(id, x, y);

        this.routingSpecification = routingSpecification;

    }

}

This results in "Exception in thread "main" com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `net.motionintelligence.commons.api.geo.RoutableCoordinate` (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator)" during Deserialization? Not quite sure if this is a jackson or lombok or my problem? Also I'm using lombok 1.16.18.

Cheers,

Daniel

[Martin Grajcar]

I'm just guessing:

Adding a dummy default constructor and letting Jackson set the final fields despite final via reflection might work.

I guess, @NoArgsConstructor(force=true) is such a constructor.

Jackson can use a constructor with @ConstructorProperties, but they don't get generated automatically anymore:

• BREAKING CHANGE: lombok config key lombok.anyConstructor.suppressConstructorProperties is now deprecated and defaults to true, that is, by default lombok no longer automatically generates @ConstructorProperties annotations. New config key lombok.anyConstructor.addConstructorPropertiesnow exists; set it to true if you want the old behavior. Oracle more or less broke this annotation with the release of JDK9, necessitating this breaking change.

The annotation @JsonProperty("routingSpec") won't get copied to the constructor arguments.

This means that the dummy default constructor with reflection can work, but not the @AllArgsConstructor (unless you use the same name both in Java and JSON).

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