AutoValue Class needs @JsonProperty for all it's abstract methods

I am using Jackson version 2.9.8, because some of my libraries depend on it (Jersey 2.27 and aws-serverless-java-container-jersey 1.3.1). I am using Jackson inside Jersey, running locally for testing under Tomcat 9, returning an AutoValue immutable object, constructed with a Builder, as the resutl of a REST GET method, encoded as JSON.

I originally defined my User class like this:

package com.example.autojackson;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.google.auto.value.AutoValue;

import java.util.UUID;

@AutoValue
@JsonSerialize(as = User.class)
@JsonDeserialize(builder = AutoValue_User.Builder.class)
public abstract class User {
    public abstract UUID id();
    @JsonProperty("first_name") 
    public abstract String firstName();
    @JsonProperty("last_name") 
    public abstract String lastName();
    public abstract String cellphone();
    public abstract String email();
    @JsonProperty("picture_url") 
    public abstract String pictureUrl();    
    @JsonProperty("user_status") 
    public abstract short userStatusCode();
    public abstract float rating();
    public abstract String gender();

    public static Builder builder() {
        return new AutoValue_User.Builder();
    }

    public abstract Builder toBuilder();

    @AutoValue.Builder
    @JsonPOJOBuilder(withPrefix = "set")
    public abstract static class Builder {
        public abstract Builder setId(UUID id);
        @JsonProperty("first_name") 
	public abstract Builder setFirstName(String firstName);
        @JsonProperty("last_name") 
	public abstract Builder setLastName(String lastName);
        public abstract Builder setCellphone(String cellphone);
        public abstract Builder setEmail(String email);
        @JsonProperty("picture_url") 
	public abstract Builder setPictureUrl(String pictureUrl);        
        @JsonProperty("user_status") 
	public abstract Builder setUserStatusCode(short userStatusCode);
        public abstract Builder setRating(float rating);
        public abstract Builder setGender(String gender);
        public abstract User build();
    }
}

As you can see, only the properties with names different from the abstract method names were annotated with @JsonProperty. According to all the docs I read, this should work, but the JSON returned to the client missed all the properties without the @JsonProperty annotation.

If in turn I change my User class to this one:

package com.example.autojackson;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.google.auto.value.AutoValue;

import java.util.UUID;

@AutoValue
@JsonSerialize(as = User.class)
@JsonDeserialize(builder = AutoValue_User.Builder.class)
public abstract class User {
    @JsonProperty("id") public abstract UUID id();
    @JsonProperty("first_name") public abstract String firstName();
    @JsonProperty("last_name") public abstract String lastName();
    @JsonProperty("cellphone") public abstract String cellphone();
    @JsonProperty("email") public abstract String email();
    @JsonProperty("picture_url") public abstract String pictureUrl();    
    @JsonProperty("user_status") public abstract short userStatusCode();
    @JsonProperty("rating") public abstract float rating();
    @JsonProperty("gender") public abstract String gender();

    public static Builder builder() {
        return new AutoValue_User.Builder();
    }

    public abstract Builder toBuilder();

    @AutoValue.Builder
    @JsonPOJOBuilder(withPrefix = "set")
    public abstract static class Builder {
        @JsonProperty("id") public abstract Builder setId(UUID id);
        @JsonProperty("first_name") public abstract Builder setFirstName(String firstName);
        @JsonProperty("last_name") public abstract Builder setLastName(String lastName);
        @JsonProperty("cellphone") public abstract Builder setCellphone(String cellphone);
        @JsonProperty("email") public abstract Builder setEmail(String email);
        @JsonProperty("picture_url") public abstract Builder setPictureUrl(String pictureUrl);        
        @JsonProperty("user_status") public abstract Builder setUserStatusCode(short userStatusCode);
        @JsonProperty("rating") public abstract Builder setRating(float rating);
        @JsonProperty("gender") public abstract Builder setGender(String gender);
        public abstract User build();
    }
}

The JSON returned by the REST endpoint correctly includes all the AutoValue implemented properties of this value class, but it’s tedious and error prone to be setting all the @JsonProperty annotations.

If you can’t reproduce this, for any reasons, please do let me know and I will upload a fully functioning Jersey example.

I could reproduce this by running:

public void testJacksonAutoValue() {
    User user = User.builder()
            .setId(UUID.randomUUID())
            .setFirstName("John")
            .setLastName("Smith")
            .setCellphone("99999")
            .setEmail("[e-mail]")
            .setPictureUrl("http://www.test.com")
            .setUserStatusCode((short)  1)
            .setRating((float) 5.0)
            .setGender("m")
            .build();
    ObjectMapper mapper = new ObjectMapper();
    try {
        System.out.println(mapper.writeValueAsString(user));
    } catch (Exception e) {
        e.printStackTrace();
    }
}

[cowtowncoder]

Thank you for reporting this.

[feinstein]

I see, well, thanks for your time, I filed another issue with a Feature Request.