JsonIgnoreProperties not working

Question

I have the following simple class:

import org.codehaus.jackson.annotate.JsonIgnoreProperties;
@JsonIgnoreProperties({ "thirdField" })
public class Message {

    private TypeA type;
    private String producer;

//Getters and Setters

}

in my test class

import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

public class Test {
   public void testMethd() {
   ObjectMapper objectMapper = new ObjectMapper();
   objectMapper.configure(MapperFeature.USE_ANNOTATIONS, true);
   Class<T> instanceType = Message.class;

   String msgBody = "{\"producer\": \"clientApp\", \"type\": \"aType\", \"thirdField\": []}";
   objectMapper.readValue(msgBody, instanceType);
   }
}

All I am trying to do is to convert the above json string into Message class and ignore the 'thirdField'. But I keep getting

com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "thirdField" (class Message), not marked as ignorable (2 known properties: , "type", "producer"])

Answer 1

You've mixed different versions of Jackson. Notice that you import JsonIgnoreProperties from org.codehaus.jackson.annotate (version 1.x) while you're using ObjectMapper from com.fasterxml.jackson.databind (version 2.x).

Answer 2

Try using the last Jackson version (2.4):

import com.fasterxml.jackson.annotation.JsonIgnoreProperties
@JsonIgnoreProperties({"id"})

Here you can find an example where it's implement using version 2.4: http://www.ibm.com/developerworks/java/library/j-hangman-app/index.html