CODEWITHSUNDEEP
jsonspring-bootjacksonjax-rsjson-serialization
Tomas Marik
Tomas Marik

Reputation: 4093

Rest: Sending List of Enums does not send all data

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"}]

Upvotes: 2

Views: 2112

Answers (1)

Paul Wasilewski
Paul Wasilewski

Reputation: 10372

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}

Upvotes: 3

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