package com.ankurm.jackson3.part4custom;

import tools.jackson.core.JsonGenerator;
import tools.jackson.databind.SerializationContext;
import tools.jackson.databind.ValueSerializer;
import tools.jackson.databind.json.JsonMapper;
import tools.jackson.databind.module.SimpleModule;

/**
 * BEYOND THE POST — the rename that breaks every custom handler on upgrade.
 *
 * Jackson 2's JsonSerializer<T>/JsonDeserializer<T> are gone. The Jackson 3 names
 * are ValueSerializer<T>/ValueDeserializer<T>. Extending ValueSerializer directly
 * (rather than StdSerializer) is the leanest form and shows the rename plainly.
 */
public class E05ValueSerializerDirect {

    public record UserId(String value) { }

    /** Renders the wrapper as a bare JSON string rather than {"value":"..."}. */
    static class UserIdSerializer extends ValueSerializer<UserId> {
        @Override
        public void serialize(UserId id, JsonGenerator gen, SerializationContext ctxt) {
            gen.writeString(id.value());
        }
    }

    public record Ticket(UserId assignee, String title) { }

    public static void main(String[] args) {
        SimpleModule module = new SimpleModule("UserIdModule");
        module.addSerializer(UserId.class, new UserIdSerializer());

        JsonMapper mapper = JsonMapper.builder().addModule(module).build();
        System.out.println("custom  : "
                + mapper.writeValueAsString(new Ticket(new UserId("u-42"), "Fix build")));
        System.out.println("default : "
                + JsonMapper.builder().build()
                        .writeValueAsString(new Ticket(new UserId("u-42"), "Fix build")));
        System.out.println("base class: "
                + UserIdSerializer.class.getSuperclass().getName());
    }
}