Rest: Sending List of Enums does not send all data

Question

1. BACKEND

In my backend (SpringBoot) I am sending list of enums:

@RequestMapping("getMyEnum")
public List<MyEnum> getMyEnum() {
    return Arrays.asList(MyEnum.values());
}

Here is MyEnum:

public enum MyEnum {

  A("bla1"),
  B("bla2");  

  private String value;

  MyEnum(String value) {
...

2. FRONTEND

In frontend (angular2) I am receiving this list in my ng2 component:

 MY_ENUMS: MyEnum[];
 ...
 this.http.get('/util/getClassifications')
  .map(response => response.json())
  .subscribe(myEnums => {
    this.MY_ENUMS = myEnums;
  });

Here is class MyEnum:

export class MyEnum {
    value: string;
}

3. RESULT

After running the code:

MY_ENUMS contains ["A", "B"]

But I would expect:

MY_ENUMS will contains [ "A" : { "value" : "bla1"}, 
                         "B" : { "value" : "bla2"}]

Answer 1

Per default Jackson (the JSON mapper which is used in Spring Boot) serializes only the enum names. To adapt your enum serialization - and treat it as every other object - add to your enum the following JsonFormat annotation and it will map all properties of the enum as well.

@JsonFormat(shape = JsonFormat.Shape.OBJECT)
public enum MyEnum

---

Update

1. Make sure your enum provides all getters.

   @JsonFormat(shape = JsonFormat.Shape.OBJECT)
   public enum MyEnum {
   
      A("bla1", 1),
      B("bla2", 2);
   
      private String valueA;
      private long valueB;
   
      MyEnum(String valueA, long valueB) {
        this.valueA = valueA;
        this.valueB = valueB;
      }
   
      public String getValueA() {
        return valueA;
      }
   
      public long getValueB() {
        return valueB;
      }
   }    
   

2. You can test you serialization with

   ObjectMapper mapper = new ObjectMapper();
   System.out.println(mapper.writeValueAsString(MyEnum.A));
   

3. The result is

   {"valueA":"bla1","valueB":1}