Mapping two java object have same fields

Question

I want to map the fields of two java objects based on condition like below.

if(sourceObject.getField1() != null && targetObject.getField1() == null){
     targetObject.setFields1(sourceObject.getField1())

}

I am using mapstruct @MappingTarget annotation but it is not giving me what I am expecting like above. I have multiple classes/subclasses with a hundred fields. Any suggestions or examples will help.

Answer 1

Not a generic solution but if you have to do specific things, you can do it in a @AfterMapping annotated method.