How to use ModelMapper for deep inheritance objects?

Possible solutions:

1. Have you tried to add the attribute type in the parent class? This should be enough if you retrieve this field from the DB.

2. A simple tested trick, add protected String type = this.getClass().getSimpleName().toLowerCase();. Notice that it must be protected. Here’s my tested code:

   @Data
   abstract class A {
     protected String type = this.getClass().getSimpleName().toLowerCase();
   }
   
    class AB extends A {}
   
    class AA extends A {}
   
    @Test
    public void test(){
       A a1 = new AB();
       A a2 = new AA();
       assertThat(a1.getType()).isEqualTo("ab");
       assertThat(a2.getType()).isEqualTo("aa");
    }