I have this schema :
public class Student { public String name; public School school; } public class School { public int id; public String name; } public class Data { public ArrayList<Student> students; public ArrayList<School> schools; }
I would like to serialize the Data object with Gson, and get something like :
{ "students": [{ "name":"name1", "school": "1" //the id of the scool, not its entire Json }], "school": [{ //the entire JSON "id" : "1", "name": "schoolName" }] }
To make that, I must use custom serializer for the student part, so that Gson only print the id of the School. But for the School, I have to have nomal serializer.
How can I do everything with only one Gson object ?
You can write a custom serializer something like this:
public class StudentAdapter implements JsonSerializer<Student> { @Override public JsonElement serialize(Student src, Type typeOfSrc, JsonSerializationContext context) { JsonObject obj = new JsonObject(); obj.addProperty("name", src.name); obj.addProperty("school", src.school.id); return obj; } }
Of course wherever you are going to serialize this object you need to add it to the Gson like this:
Gson gson = new GsonBuilder() .registerTypeAdapter(Student.class, new StudentAdapter()) .create(); return gson.toJson([YOUR_OBJECT_TO_BE_SERIALIZED]);
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With