CODEWITHSUNDEEP
jhipstermapstruct
Srujan Thadagoppula
Srujan Thadagoppula

Reputation: 81

Mapping a DTO in a DTO to entity in entity with mapstruct

I have a situation where I have another DTO in inside a DTO to which I have to map to its corresponding entity.

I am using mapstruct and I already have AnotherEntityMapper already existing.

DTO

public class EntityDTO {

   private AnotherEntityDTO anotherEntityDTO;
   // other fields
}

Entity

@Entity
public class Entity {
  private AnotherEntity anotherEntity;
  // other fields
}

How to change the EntityMapper interface, so that I can map anotherEntityDTO to anotherEntity?

Thanks.

Upvotes: 2

Views: 6054

Answers (1)

Filip
Filip

Reputation: 21403

It really depends which version of MapStruct you are using. If you are using 1.2.0.Beta or higher they you can just define the nested properties on your EntityMapper interface:

@Mapper
public interface EntityMapper {

    @Mapping(target = "anotherEntity", source = "anotherEntityDTO")
    @Mapping(target = "anotherEntity.propE", source = "anotherEntityDTO.propD")
    Entity map(EntityDDTO dto);

}

Another option (and a must if you are using version less than 1.2.0.Beta) is to add a new Method in your EntityMapper like:

@Mapper
public interface EntityMapper {

    @Mapping(target = "anotherEntity", source = "anotherEntityDTO")
    Entity map(EntityDDTO dto);

    @Mapping(target = "propE", source = "propD")
    AnotherEntity map(AnotherEntityDTO);
}

or you can define a new Mapper AnotherEntityMapper for the AnotherEntity and use @Mapper(uses = {AnotherEntityMapper.class}):

@Mapper
public interface AnotherEntityMapper {

    @Mapping(target = "propE", source = "propD")
    AnotherEntity map(AnotherEntityDTO);
}

@Mapper(uses = {AnotherEntityMapper.class}
public interface EntityMapper {

    @Mapping(target = "anotherEntity", source = "anotherEntityDTO")
    Entity map(EntityDDTO dto);
}

It really depends on your use case. If you need to do mappings between AnotherEntity and AnotherEntityDTO on other places, I would suggest to use a new interface so you can reuse it where you need it

Upvotes: 6

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