How to get rest response that contains only certain object's json? - json

Question

My goal is to get rest services working on spring boot web application.
But I am struggling with finding out how to tell response to include object's json only.
To be more precise, when calling http://localhost:8080/api/db/Keyboard/2, I intend to receive object with id 2 in json format and only:
{
"id": 2,
"language": "en"
}
But instead I get:
{
"status": 200,
"entity": {
"id": 2,
"language": "en"
},
"metadata": {},
"length": -1,
"allowedMethods": [],
"cookies": {},
"headers": {},
"actualEntity": {
"id": 2,
"language": "en"
},
"links": [],
"statusInfo": {
"reasonPhrase": "OK",
"statusCode": 200,
"family": "SUCCESSFUL"
},
"stringHeaders": {}
}
Clearly response contains too much info. Only the entity part is needed. How to reach intended result / adjust conditionally the response?
Below some files that might be relevant.
TestController.java:
import java.util.HashMap;
import java.util.Map;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.ResponseBuilder;
import javax.ws.rs.core.Response.Status;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import main.domain.DaoApi;
import main.domain.Keyboard;
#RestController
public class TestController<T, K> {
private final static Map<String, Class<?>> tableClassMap = new HashMap<>();
#Autowired
private DaoApi<T, K> daoApi;
static {
addEntryTableClassMap(Keyboard.class);
}
#RequestMapping(value = "/api/db/{tableName}/{id}", method = RequestMethod.GET)
public Response getById(#PathVariable(value = "tableName") String tableName, #PathVariable(value = "id") Integer id) {
ResponseBuilder responseBuilder;
T entity = (T) daoApi.findById((Class<T>) getClassFromTableClassMap(tableName), id);
if (entity != null) {
responseBuilder = Response.ok(entity);
} else {
responseBuilder = Response.status(Status.NOT_FOUND);
}
return responseBuilder.build();
}
private static <C> void addEntryTableClassMap(Class<C> clazz) {
tableClassMap.put(clazz.getSimpleName().toLowerCase(), clazz);
}
private static <C> Class<C> getClassFromTableClassMap(String tableName) {
return (Class<C>) tableClassMap.get(tableName.toLowerCase());
}
}
Keyboard.java:
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import org.springframework.transaction.annotation.Transactional;
#Transactional
#Entity
#Table(name = "keyboard")
public class Keyboard {
#Id
#Column(updatable = false)
private int id;
private String language;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getLanguage() {
return language;
}
public void setLanguage(String language) {
this.language = language;
}
}
DaoApi.java:
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
#Component
public class DaoApi<T, K> {
#Autowired
SessionFactory sessionFactory;
public T findById(Class<T> clazz, Integer id) {
Session session = sessionFactory.openSession();
T t = (T) session.get(clazz, id);
session.close();
return t;
}
}

Answer 1

Received comment that helped me to solution:
#RequestMapping(value = "/api/db/{tableName}/{id}", method = RequestMethod.GET)
public T getById(#PathVariable(value = "tableName") String tableName, #PathVariable(value = "id") Integer id) {
ResponseBuilder responseBuilder;
T entity = (T) daoApi.findById((Class<T>) getClassFromTableClassMap(tableName), id);
if (entity != null) {
responseBuilder = Response.ok(entity);
return (T) responseBuilder.build().getEntity();
} else {
responseBuilder = Response.status(Status.NOT_FOUND);
//some additional code here
return (T) responseBuilder.build();
}
}