JsonIgnoreProperties not working - jackson

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

Answer 3

I found a Solution to this.
Try to add
#JsonSerialize(include= JsonSerialize.Inclusion.NON_EMPTY)
About your class
#JsonSerialize(include= JsonSerialize.Inclusion.NON_EMPTY)
class ResponseModel {
//your properties here
#JsonIgnoreProperties("messageList","contactList","sender")
var contactList= ArrayList<ContactModel>()
}
That will solve your issue buddy.

Answer 4

It didn't work for me any of the above answers, i found a workaround that I have reinitialized the object and values (copied the object).