CODEWITHSUNDEEP
javamapstruct
MychaL
MychaL

Reputation: 999

How to convert an interface with MapStruct?

I made some research in the mapStruct documentation but did not find or understood what I could do to achieve this: the conversation of an entity containing an interface to a flat DTO object.

Here the entity with the attribute:

public class Group {
    ...

    private IUser user;

    ...
}

Here the DTO:

public GroupDTO {

    private Long idUser;

    private String username;
}

We try this mapping :

@Mappings({
        @Mapping(source = "user.id", target = "idUser"),
        @Mapping(source = "user.name", target = "username")})
GroupDTO toDTO(Group entity);

With a classic mapping, mapStruct generates an error (IUser is abstract; cannot be instantiated).

Any idea ? Thank you.

Upvotes: 1

Views: 4277

Answers (3)

saba
saba

Reputation: 488

hi i am using map struct version : 1.3.1.Final and i mapped from interface to dto easily:

@Mapper(componentModel = "spring")
public interface OrderSummeryMapper {
    AllocatedOrderSummeryResponse toOrderSummery (AllocatedOrderSummery orderSummery);
}

my dto:

@Data //lombok annotation
@NoArgsConstructor
@AllArgsConstructor
public class AllocatedOrderSummeryResponse implements Serializable {
     Integer customerId;
     String deliveryCategory;
}

interface:

public interface AllocatedOrderSummery {

    Integer getCustomerId();
    String getDeliveryCategory();
}

Upvotes: 1

Gunnar
Gunnar

Reputation: 18990

It should work with an object factory method:

public IUser createIUser() {
    return new User();
}

This factory method will the be invoked if an instance of IUser is needed.

Upvotes: 0

MychaL
MychaL

Reputation: 999

Not sure its the best way to do it...

But we used @AfterMapping to create manually in default method the object to implement on interface.

We had to delete @InheritInverseConfiguration for reverse operation.

Upvotes: 1

Related Questions