Map enums with mapstruct

Question

I have to make custom mappers on the application I’m working on. Some properties are enum types like this. I’m trying to figure out how to create a map in this situation.

Here's the property of the entity:

@JsonProperty("csp")
private JsonNullable<Csp> csp = JsonNullable.undefined();

where Csp is an enum

Here's the property of the dto I want to map:

private String profession;

Here's the map that’s not good:

@Mapping(target = "assure", source = "assure", qualifiedByName = "toAssureDto")

@Named("toAssureDto")
@Mapping(target = "profession", source = "csp")
AssureDto toDto(final AssureAuto entity);

Thanks for help

Answer 1

Solution 1 (expressions):

@Named("toAssureDto")
//assuming csp is not null, and that I want to map the value of the enum returned by .toString() that can be different from .name()
@Mapping(target = "profession", expression = "java(entity.getCsp().get().toString())")
AssureDto toDto(final AssureAuto entity);

Solution 2 (adding-custom-methods):

@Named("toAssureDto")
@Mapping(target = "profession", source = "csp", qualifiedByName = "mapCsp")
AssureDto toDto(final AssureAuto entity);

@Named("mapCsp") 
default String mapCsp(JsonNullable<Csp> csp){
    //add your custom mapping implementation
    //here is an example assuming csp is not null, and that I want to map the value of the enum returned by .toString() that can be different from .name()
    return csp.get().toString();
}

Other Documentation:

• mapping-enum-types