package fi.otavanopisto.pyramus.dao.grading;
import java.util.Date;
import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Join;
import javax.persistence.criteria.Root;
import fi.otavanopisto.pyramus.dao.PyramusEntityDAO;
import fi.otavanopisto.pyramus.domainmodel.grading.Credit;
import fi.otavanopisto.pyramus.domainmodel.grading.CreditLink;
import fi.otavanopisto.pyramus.domainmodel.grading.CreditType;
import fi.otavanopisto.pyramus.domainmodel.students.Student;
import fi.otavanopisto.pyramus.domainmodel.users.User;
import fi.otavanopisto.pyramus.domainmodel.grading.CreditLink_;
import fi.otavanopisto.pyramus.domainmodel.grading.Credit_;
@Stateless
public class CreditLinkDAO extends PyramusEntityDAO<CreditLink> {
public CreditLink create(Credit credit, Student student, User creator) {
CreditLink creditLink = new CreditLink();
creditLink.setCredit(credit);
creditLink.setStudent(student);
creditLink.setCreator(creator);
creditLink.setCreated(new Date());
creditLink.setArchived(Boolean.FALSE);
return persist(creditLink);
}
public List<CreditLink> listByStudentAndType(Student student, CreditType creditType) {
EntityManager entityManager = getEntityManager();
CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
CriteriaQuery<CreditLink> criteria = criteriaBuilder.createQuery(CreditLink.class);
Root<CreditLink> root = criteria.from(CreditLink.class);
Join<CreditLink, Credit> join = root.join(CreditLink_.credit);
criteria.select(root);
criteria.where(
criteriaBuilder.and(
criteriaBuilder.equal(root.get(CreditLink_.student), student),
criteriaBuilder.equal(join.get(Credit_.creditType), creditType),
criteriaBuilder.equal(root.get(CreditLink_.archived), Boolean.FALSE)
)
);
return entityManager.createQuery(criteria).getResultList();
}
public List<CreditLink> listByStudent(Student student) {
EntityManager entityManager = getEntityManager();
CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
CriteriaQuery<CreditLink> criteria = criteriaBuilder.createQuery(CreditLink.class);
Root<CreditLink> root = criteria.from(CreditLink.class);
criteria.select(root);
criteria.where(
criteriaBuilder.and(
criteriaBuilder.equal(root.get(CreditLink_.student), student),
criteriaBuilder.equal(root.get(CreditLink_.archived), Boolean.FALSE)
)
);
return entityManager.createQuery(criteria).getResultList();
}
public Long countByStudent(Student student) {
EntityManager entityManager = getEntityManager();
CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
CriteriaQuery<Long> criteria = criteriaBuilder.createQuery(Long.class);
Root<CreditLink> root = criteria.from(CreditLink.class);
criteria.select(criteriaBuilder.count(root));
criteria.where(
criteriaBuilder.and(
criteriaBuilder.equal(root.get(CreditLink_.student), student),
criteriaBuilder.equal(root.get(CreditLink_.archived), Boolean.FALSE)
));
return entityManager.createQuery(criteria).getSingleResult();
}
public CreditLink findByStudentAndCredit(Student student, Credit credit) {
EntityManager entityManager = getEntityManager();
CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
CriteriaQuery<CreditLink> criteria = criteriaBuilder.createQuery(CreditLink.class);
Root<CreditLink> root = criteria.from(CreditLink.class);
// TODO Credit archived?
criteria.select(root);
criteria.where(
criteriaBuilder.and(
criteriaBuilder.equal(root.get(CreditLink_.student), student),
criteriaBuilder.equal(root.get(CreditLink_.credit), credit),
criteriaBuilder.equal(root.get(CreditLink_.archived), Boolean.FALSE)
)
);
return getSingleResult(entityManager.createQuery(criteria));
}
}