Using Jackson JSON Views without annotating original bean class

Question

Is there any way that I can use Jackson JSON Views or something like it, without having to annotate the original bean class? I\'m looking for some kind of runtime/dynamic c

Answer 1

How about using the Mix-In feature?

http://wiki.fasterxml.com/JacksonMixInAnnotations

http://www.cowtowncoder.com/blog/archives/2009/08/entry_305.html

---

import org.codehaus.jackson.annotate.JsonAutoDetect.Visibility;
import org.codehaus.jackson.annotate.JsonMethod;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.SerializationConfig;
import org.codehaus.jackson.map.annotate.JsonView;

public class JacksonFoo
{
  public static void main(String[] args) throws Exception
  {
    ObjectMapper mapper = new ObjectMapper().setVisibility(JsonMethod.FIELD, Visibility.ANY)
        .configure(SerializationConfig.Feature.DEFAULT_VIEW_INCLUSION, false);
    mapper.getSerializationConfig().addMixInAnnotations(Bar.class, BarMixIn.class);
    mapper.setSerializationConfig(mapper.getSerializationConfig().withView(Expose.class));

    System.out.println(mapper.writeValueAsString(new Bar()));
    // output: {"b":"B"}
  }
}

class Bar
{
  String a = "A";
  String b = "B";
}

abstract class BarMixIn
{
  @JsonView(Expose.class)
  String b;
}

// Used only as JsonView marker.  
// Could use any existing class, like Object, instead.  
class Expose {}