SubjectServiceImpl.java

package no.niths.services.school;

import no.niths.application.rest.helper.Status;
import no.niths.common.helpers.MessageProvider;
import no.niths.common.helpers.ValidationHelper;
import no.niths.domain.location.Room;
import no.niths.domain.school.Student;
import no.niths.domain.school.Subject;
import no.niths.infrastructure.interfaces.GenericRepository;
import no.niths.infrastructure.location.interfaces.RoomRepository;
import no.niths.infrastructure.school.interfaces.StudentRepository;
import no.niths.infrastructure.school.interfaces.SubjectRepository;
import no.niths.services.AbstractGenericService;
import no.niths.services.school.interfaces.SubjectService;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
/**
 * Service Class for Subject
 *
 * <p>
 * Inherits the basic CRUD actions and has methods
 * for addTutor, removeTutor, addRoom
 * and removeRoom
 * </p>
 */
@Service
public class SubjectServiceImpl extends AbstractGenericService<Subject>
        implements SubjectService {

    private Logger logger = LoggerFactory.getLogger(SubjectServiceImpl.class);

    @Autowired
    private SubjectRepository subjectRepository;

    @Autowired
    private StudentRepository studentRepository;

    @Autowired
    private RoomRepository roomRepository;

    @Override
    public GenericRepository<Subject> getRepository() {
        return subjectRepository;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addTutor(Long subjectId, Long studentId) {
        Subject subject = validate(subjectRepository.getById(subjectId), Subject.class);
        checkIfObjectIsInCollection(subject.getTutors(), studentId, Student.class);

        Student tutor = studentRepository.getById(studentId);
        ValidationHelper.isObjectNull(tutor, Student.class);

        subject.getTutors().add(tutor);
        logger.debug(MessageProvider.buildStatusMsg(Student.class,
                Status.UPDATED));
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void removeTutor(Long subjectId, Long studentId) {
        Subject subject = validate(subjectRepository.getById(subjectId), Subject.class);
        checkIfIsRemoved(subject.getTutors().remove(new Student(studentId)),
                Student.class);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addRoom(Long subjectId, Long roomId) {
        Subject subject = validate(subjectRepository.getById(subjectId), Subject.class);
        checkIfObjectExists(subject.getRoom(), roomId, Room.class);

        Room room = roomRepository.getById(roomId);
        ValidationHelper.isObjectNull(room, Room.class);

        subject.setRoom(room);
        logger.debug(MessageProvider.buildStatusMsg(Room.class,
                Status.UPDATED));
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void removeRoom(Long subjectId) {
        Subject subject = validate(subjectRepository.getById(subjectId), Subject.class);

        boolean isRemoved = false;

        if (subject.getRoom() != null) {
            subject.setRoom(null);
            isRemoved = true;
        }

        checkIfIsRemoved(isRemoved, Room.class);
    }
}