Annotation Interface SerializedName


@Documented @Retention(RUNTIME) @Target({FIELD,METHOD}) public @interface SerializedName
An annotation that indicates this member should be serialized to JSON with the provided name value as its field name.

This annotation will override any FieldNamingPolicy, including the default field naming policy, that may have been set on the Gson instance. A different naming policy can set using the GsonBuilder class. See GsonBuilder.setFieldNamingPolicy(com.google.gson.FieldNamingPolicy) for more information.

Here is an example of how this annotation is meant to be used:

 public class MyClass {
   @SerializedName("name") String a;
   @SerializedName(value="name1", alternate={"name2", "name3"}) String b;
   String c;

   public MyClass(String a, String b, String c) {
     this.a = a;
     this.b = b;
     this.c = c;
   }
 }
 

The following shows the output that is generated when serializing an instance of the above example class:

 MyClass target = new MyClass("v1", "v2", "v3");
 Gson gson = new Gson();
 String json = gson.toJson(target);
 System.out.println(json);

 ===== OUTPUT =====
 {"name":"v1","name1":"v2","c":"v3"}
 

NOTE: The value you specify in this annotation must be a valid JSON field name.

While deserializing, all values specified in the annotation will be deserialized into the field. For example:
   MyClass target = gson.fromJson("{'name1':'v1'}", MyClass.class);
   assertEquals("v1", target.b);
   target = gson.fromJson("{'name2':'v2'}", MyClass.class);
   assertEquals("v2", target.b);
   target = gson.fromJson("{'name3':'v3'}", MyClass.class);
   assertEquals("v3", target.b);
 
Note that MyClass.b is now deserialized from either name1, name2 or name3.
See Also:
  • Required Element Summary

    Required Elements
    Modifier and Type
    Required Element
    Description
     
  • Optional Element Summary

    Optional Elements
    Modifier and Type
    Optional Element
    Description
     
  • Element Details

    • value

      String value
      Returns:
      the desired name of the field when it is serialized or deserialized
    • alternate

      String[] alternate
      Returns:
      the alternative names of the field when it is deserialized
      Default:
      {}