[BUG] Lombok with Jackson - @JsonProperty added to the generated setter causes error

[JulienHoueix]

Hello,

I have a problem with the last version of Lombok (1.18.12).

The @JsonProperty of the field is copied to the generated setter by Lombok, and that causes an error when an annotation @JacksonXmlProperty also exists on that field.

Here is an example:

import org.junit.Test;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;
import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;

import lombok.Getter;
import lombok.Setter;

public class LombokTest {

    @Test
    public void test() throws JsonProcessingException {
        MyClass myClass = new MyClass();
        XmlMapper xmlMapper = new XmlMapper();
        String xml = xmlMapper.writeValueAsString(myClass);
    }

}

@Getter
@Setter
class MyClass {

    @JacksonXmlProperty(localName = "MY_FIELD")
    @JsonProperty("my_field")
    private String myField;

}

It causes the following error:
java.lang.IllegalStateException: Conflicting/ambiguous property name definitions (implicit name 'myField'): found multiple explicit names: [{}MY_FIELD, my_field], but also implicit accessor: [method MyClass#getMyField(0 params)][visible=true,ignore=false,explicitName=false]

In 1.18.6 we did not have this error because the annotation @JsonProperty was not added tothe setter in the generated code.

I guess it is related to #1981

[janrieke]

Is probably already fixed by PR #2429 (that will also copy @JacksonXmlProperty). However, it's not in the latest edge release, yet.

[janrieke]

It's now in the latest edge snapshot. Could you check if this fixes your issue?

[JulienHoueix]

I have tested with lombok-edge-20200528.222155-1 and it fixes the issue, the test passes.