Map source class to a target field

Question

I'm working on spring boot application where, I have two classes namely A and B.

@Data
class A{
 int id;
 String name;
}

@Data
class B{
 int bId;
 A a;
}

I need to map a field of class B which is a using mapstruct. How to map a source class A to target field a as well as to class B. Example mapper will be like

@Mapping(source="id", target="bId")
B fromClassA(A a);

score 1 · Accepted Answer · answered Apr 29 '21 at 06:20

1

You can use @AfterMapping, something like this:

@Mapping(source="id", target="bId")
B fromClassA(A a);
@AfterMapping
default void fillAinB(@MappingTarget B target, A source) {
  b.setA(source);
}

answered Apr 29 '21 at 06:20

Grigorii Riabov

185
2
8

There is a better approach to this with only using `@Mapping`. See my answer – Filip Apr 29 '21 at 17:42

score 1 · Answer 2 · answered Apr 29 '21 at 17:42

1

The best way to do the mapping would be to define it in @Mapping.

e.g.

@Mapping(source="id", target="bId")
@Mapping(target = "a", source="a")
B fromClassA(A a);

You can use the name of the parameter in the Mapping#source

answered Apr 29 '21 at 17:42

Filip

19,269
7
51
60

Map source class to a target field

2 Answers2