Demo for https://stackoverflow.com/q/46650940/1032167

JacksonDeserializefromId.java

import com.fasterxml.jackson.annotation.*;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Created by varren on 09.10.17.
 */
public class Main10 {


    public static class A  {

        @JsonProperty("b")
        @JsonIdentityReference(alwaysAsId = true) // used for serialization only
        private B b;

        @Override
        public String toString() {
            return "A{b=" + b + '}';
        }
    }


    @JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class,
            resolver = MyObjectIdResolver.class, // used for deserialization only
            property = "id", scope = B.class)
    public static class B  {
        @JsonProperty("id")
        private int id;
        @JsonProperty("a")
        private List<A> a = new ArrayList<>();

        public B() {
        }

        public B(int id) {
            this.id = id;
        }

        public int getId() {
            return id;
        }

        public void setId(int id) {
            this.id = id;
        }

        @Override
        public String toString() {
            return "B{id=" + id +", a=" + a + '}';
        }
    }
    private static class MyObjectIdResolver implements ObjectIdResolver {
        private Map<ObjectIdGenerator.IdKey,Object> _items  = new HashMap<>();

        @Override
        public void bindItem(ObjectIdGenerator.IdKey id, Object pojo) {
            if (!_items.containsKey(id)) _items.put(id, pojo);
        }

        @Override
        public Object resolveId(ObjectIdGenerator.IdKey id) {
            Object object = _items.get(id);
            return object == null ? getById(id) : object;
        }

        protected Object getById(ObjectIdGenerator.IdKey id){
            Object object = null;

            try {
                //can resolve object here if you want extra logic
                object = id.scope.getConstructor().newInstance(); // create instance
                id.scope.getMethod("setId", int.class).invoke(object, id.key);  // set id


            } catch (Exception e) {
                e.printStackTrace();
            }

            return object;
        }

        @Override
        public ObjectIdResolver newForDeserialization(Object context) {
            return new MyObjectIdResolver();
        }

        @Override
        public boolean canUseFor(ObjectIdResolver resolverType) {
            return resolverType.getClass() == getClass();
        }
    }
    public static void main(String[] args) throws IOException {
        final ObjectMapper mapper = new ObjectMapper();
        String json = "{\"b\": 1}";
        A newB =  mapper.readValue(json, A.class);
        System.out.println("From json    : "+ json);
        System.out.println("To Object    : "+newB);
        System.out.println("Back to json : "+mapper.writeValueAsString(newB));
    }
}

MyObjectIdResolverAutowired.java

@Configuration // need this for ApplicationContextAware to work without HandlerInstantiator config for jackson
public class MyObjectIdResolver implements ObjectIdResolver {
    
    private static PersistenceService service;


    public MyObjectIdResolver() {}
    
    @Autowired
    public MyObjectIdResolver(PersistenceService service) {
        MyObjectIdResolver.service = service;
    }

    private Map<ObjectIdGenerator.IdKey, Object> _items = new HashMap<>();


    @Override
    public void bindItem(ObjectIdGenerator.IdKey id, Object pojo) {
        if (!_items.containsKey(id)) _items.put(id, pojo);
    }

    @Override
    public Object resolveId(ObjectIdGenerator.IdKey id) {
        Object object = _items.get(id);
        return object == null ? getById(id) : object;
    }

    protected Object getById(ObjectIdGenerator.IdKey id) {
        Object object = null;

        try {

            object = service.getObjectById((Integer) id.key, id.scope);
            //can resolve object here if you want extra logic
            //object = id.scope.getConstructor().newInstance(); // create instance
            // id.scope.getMethod("setId", int.class).invoke(object, id.key);  // set id


        } catch (Exception e) {
            e.printStackTrace();
        }

        return object;
    }

    @Override
    public ObjectIdResolver newForDeserialization(Object context) {
        return new MyObjectIdResolver();
    }

    @Override
    public boolean canUseFor(ObjectIdResolver resolverType) {
        return resolverType.getClass() == getClass();
    }

}

PersistenceService.java

@Service("persistenceService")
public class PersistenceService {
    public Object getObjectById(int id, Class classObj) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
        //just normal spring flow we are in spring been now.
        // can access db

        //just for tests we still use reflection
        Object object = classObj.getConstructor().newInstance(); // create instance
        classObj.getMethod("setId", int.class).invoke(object, id);  // set id
        classObj.getMethod("setName", String.class).invoke(object, "name From getObjectById");  // set id

        return object;

    }

}