UserApprovalFacade.java
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package fi.codecrew.moya.facade;
import java.util.Date;
import javax.ejb.LocalBean;
import javax.ejb.Stateless;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;
import fi.codecrew.moya.model.Approval;
import fi.codecrew.moya.model.EventUser;
import fi.codecrew.moya.model.UserApproval;
import fi.codecrew.moya.model.UserApproval_;
@Stateless
@LocalBean
public class UserApprovalFacade extends IntegerPkGenericFacade<UserApproval> {
public UserApprovalFacade() {
super(UserApproval.class);
}
public UserApproval findOrCreateApproval(EventUser user, Approval approval) {
UserApproval ret = findApproval(user, approval);
if (ret == null)
{
ret = new UserApproval();
ret.setUser(user);
ret.setApproval(approval);
ret.setApprovalTime(new Date());
create(ret);
}
return ret;
}
public UserApproval findApproval(EventUser user, Approval approval) {
CriteriaBuilder cb = getEm().getCriteriaBuilder();
CriteriaQuery<UserApproval> cq = cb.createQuery(UserApproval.class);
Root<UserApproval> root = cq.from(UserApproval.class);
cq.where(cb.equal(root.get(UserApproval_.approval), approval),
cb.equal(root.get(UserApproval_.user), user)
);
return super.getSingleNullableResult(getEm().createQuery(cq));
}
}