Mapstruct在实现中添加注释

Question

I've got entity with byte[] field, same as in my DTO object. In both classes those fields are annotated as @NotNull . The problem is that mapstruct generate code like that:

(@javax.validation.constraints.NotNull :: byte)[] data = file.getData();

instead of

byte[] data = file.getData()

I can use annotation like that

@Mapping(ignore = true, source = "data", target = "data")

to "solve" this problem, and set those fields in my service, but i don't think it's best solution.

Problem only occurs with this byte[] , there is no problem with other @NonNull fields.

Answer 1

This is a known bug in MapStruct 1.2.0.Final. It has been fixed since 1.3.0.Beta2 (latest release at the time of this answer).

The reported issue for this was mapstruct/mapstruct#1558 .

The problem can only be seen when annotations of the type ElementType.TYPE_VAR were used for primitive arrays. The same problem can be seen if int[] (for example) is used.