sending json stored as string property of an object as JSON object to client

Question

I am using cassandra as DB and storing user address as JSON in "address" field of User object.

class User {
  private long id;
  private String name;
  private String address;
}

Then the User row in DB columns as follows

id   |  name  |   address
================================
12345|  jhon  | {"hno":"12-10-46/3","street":"lavella road","city":"begaluru"}

But when I query User object from DB and returned as result of a REST api I see Jackson converting User object to JSON. But I observed that "address" field as string type instead of another JSON object. But I want that "address" should be interpreted as JSON object on client side.

How I could say jackson to convert internal string property to JSON as well?

Marcus Henrique · Accepted Answer · 2015-04-26 13:29:29Z

2

I think you should use the annotation @JsonRawValue in your address field.

@JsonRawValue: per-property marker that can be used to specify that the value of property is to be included in serialization ''exactly'' as is, with no escaping or decoration -- useful for embedding pre-serialized JSON (or whatever data format is being used) in output

https://github.com/FasterXML/jackson-annotations/wiki/Jackson-Annotations

answered Apr 26, 2015 at 13:29

Marcus Henrique

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1 Comment

Pokuri Over a year ago

This also works for JSON included JSOn stored as String?

Wranorn · Accepted Answer · 2015-04-26 13:30:27Z

0

It's being treated as a string because it is a string. You'll need to convert it to an object. Not being fluent in Java I managed to find this snippet that uses the javascript engine to eval the string into an object, the same as a browser would do:

 ScriptEngineManager manager = new ScriptEngineManager();
 ScriptEngine engine = manager.getEngineByName("js");        
 Object result = engine.eval([Your Address String Variable Here]);

And then result should be an object derived from the string.

Hope this helps.

answered Apr 26, 2015 at 13:30

Wranorn

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