CODEWITHSUNDEEP
javajackson
Matteo Pacini
Matteo Pacini

Reputation: 22846

Apply JsonView when serialising property with Jackson

I have the following class I want to serialize.

class User {

    private String username;
    @JsonView(Views.Default.class)
    private List<User> followers;
}

The views are defined as follows:

class Views {
    static class Default { }
    static class Follower { } 
}

The idea is to fetch a user and show a list of followers (User type) but without the followersfield.

{
  "username": "aaaaa",
  "followers": [
    { "username" : "bbbbb" },
    { "username" : "ccccc" }
  ]
}

What's the best way to tell Jackson to apply the Follower view on the followers property when serializing a User object?

With the current configuration I still see the followers property in array of users.

Thanks.

Upvotes: 4

Views: 332

Answers (1)

StaxMan
StaxMan

Reputation: 116522

You will need to use ObjectWriter instead of ObjectMapper to specify active view to use for serialization. So, for example:

String json = mapper.writerWithView(Views.Compact.class)
   .writeValueAsJson(user);

since you will need to use view other than Default (or its sub-classes): views are used for inclusion.

Upvotes: 1

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