Jackson MixInAnnotation using SimpleModule doesn't work

I am using SimpleModule to register MixIn with serialization and deserialization. I cannot get it to work. The classes are shown below. When I print the serialized string, I see the size printed and the properties are not named as I specified in the mixin. This is a seal {"w":5,"h":10,"size":50}

. So registering the connection with the serializer and deserialization configuration was unsuccessful. What am I doing wrong.

MixIn class:

import org.codehaus.jackson.annotate.JsonIgnore;
import org.codehaus.jackson.annotate.JsonProperty;

    abstract class MixIn {
        MixIn(@JsonProperty("width") int w, @JsonProperty("height") int h) {
        }

        @JsonProperty("width")
        abstract int getW();

        @JsonProperty("height")
        abstract int getH();

        @JsonIgnore
        abstract int getSize();

    }

      

        
        
        
      

    

Rectangle Class:

 public final class Rectangle {
    final private int w, h;

    public Rectangle(int w, int h) {
        this.w = w;
        this.h = h;
    }

    public int getW() {
        return w;
    }

    public int getH() {
        return h;
    }

    public int getSize() {
        return w * h;
    }
}

      

        
        
        
      

    

MixIn registration:

import org.codehaus.jackson.Version;
import org.codehaus.jackson.map.module.SimpleModule;


public class MyModule extends SimpleModule {
    public MyModule() {
        super("ModuleName", new Version(0, 0, 1, null));
    }

    @Override
    public void setupModule(SetupContext context) {
        context.setMixInAnnotations(Rectangle.class, MixIn.class);

        // and other set up, if any
    }
}

      

        
        
        
      

    

Test class:

import java.io.IOException;

import org.codehaus.jackson.map.ObjectMapper;
import org.junit.Test;

public class DeserializationTest {

    @Test
    public void test() throws IOException {

        ObjectMapper objectMapper = new ObjectMapper();

        // objectMapper.getSerializationConfig().addMixInAnnotations(Rectangle.class, MixIn.class);
        // objectMapper.getDeserializationConfig().addMixInAnnotations(Rectangle.class, MixIn.class);

        String str = objectMapper.writeValueAsString(new Rectangle(5, 10));
        System.out.println(str);
        Rectangle r = objectMapper.readValue(str, Rectangle.class);

    }
}