OpenJPA and DTO problem

[Karl Kildén]

Hi,

I use openjpa with DTO and when I try to manage @Version I get an
exception:  Detected attempt to modify field
"com.kildeen.ref.domain.BaseEntity.version" with value strategy "restrict".

What I do is, I use find if the DTO has id. I then copy back the version
field but it seems It does not work since I get that exception... Can it be
done somehow?

Code below:

    @Override
    protected Fact toEntity(final FactDTO dto) {
        Fact fact;
        if (dto.getId() != 0) {
            fact = em.find(Fact.class, dto.getId());
        } else {
            fact = new Fact();
        }

        if (dto.getVersion() != entity.getVersion()) {
            entity.setVersion(dto.getVersion());

        }

cheers