Deserialize only specific JSON tags with Jackson

Question

Is there a way that I don't need to retrieve the tags that I need "manually" from JSON, if I don't want to deserialize them all so that I can use this constructor?

public class Tweet { public String username; public String message; public String image_url; @JsonCreator public Tweet( @JsonProperty("from_user") String username, @JsonProperty("text") String message, @JsonProperty("profile_image_url") String url) { this.username = username; this.message = message; this.image_url = url; } } 

And here is the JSON:

  { "created_at":"Wed, 15 Aug 2012 18:17:55 +0000", "from_user":"felix_panda", "from_user_id":132396774, "from_user_id_str":"132396774", "from_user_name":"felix suganda", "geo":null, "id":235802515571101696, "id_str":"235802515571101696", "iso_language_code":"en", "metadata":{ "result_type":"recent" }, "profile_image_url":"http:\/\/a0.twimg.com\/profile_images\/2393214158\/profile_normal.jpg", "profile_image_url_https":"https:\/\/si0.twimg.com\/profile_images\/2393214158\/profile_normal.jpg", "source":"<a href="http:\/\/www.tweetcaster.com" rel="nofollow">TweetCaster for Android<\/a>", "text":"@Android how do u fix you lost your data connection because you left home network with data roaming (cont) http:\/\/t.co\/4coRjaXT", "to_user":"Android", "to_user_id":382267114, "to_user_id_str":"382267114", "to_user_name":"Android" 

This is the error I get when deserializing:

 com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "created_at" 

Answer 1

Looks like you want to disable FAIL_ON_UNKNOWN_PROPERTIES .

Answer 2

I am using MongoJack. Here is what I did to solve it.

  ObjectMapper mapper = new ObjectMapper().setVisibility(PropertyAccessor.FIELD, Visibility.ANY); mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); MongoJackModule.configure(mapper); JacksonDBCollection<Message, Long> coll = JacksonDBCollection.wrap(dbCollection, Message.class, Long.class, mapper);