SubjectClassService.java
/**
* TFG 75.678 - TFG Desarrollo web 2020 e-Learning for Schools
* Copyright (C) 2020 Eduardo Rodriguez Carro
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.uoc.tfg.sel.service;
import java.util.List;
import java.util.Optional;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.uoc.tfg.sel.repository.SubjectClassRepository;
import org.uoc.tfg.sel.repository.model.SubjectClass;
import org.uoc.tfg.sel.repository.model.User;
/**
* The Class SubjectClassService.
*
* @author Eduardo Rodriguez Carro
*/
@Service
public class SubjectClassService {
/** The Constant logger. */
private static final Logger logger = LoggerFactory.getLogger(SubjectClassService.class);
/** The student type. */
@Value("${user.type.student:5}")
private Integer studentType;
/** The subject class repository. */
@Autowired
private SubjectClassRepository subjectClassRepository;
/**
* Gets the all.
*
* @return the all
*/
@Transactional(readOnly = true)
public List<SubjectClass> getAll(){
return ServiceUtils.iterableToList(subjectClassRepository.findAll());
}
/**
* Gets the myclasses.
*
* @param user the user
* @return the myclasses
*/
@Transactional(readOnly = true)
public List<SubjectClass> getMyclasses(User user) {
Integer typeId = user.getType().getId();
if (typeId == studentType) {
return subjectClassRepository.getByStudents(user);
}else {
return subjectClassRepository.getByTeacher(user);
}
}
/**
* Gets the by id.
*
* @param id the id
* @param withStudents the with students
* @return the by id
*/
@Transactional(readOnly = true)
public SubjectClass getById(Integer id,boolean withStudents, User user) {
Optional<SubjectClass> item = subjectClassRepository.findById(id);
if (item.isPresent()) {
SubjectClass subjectClass = item.get();
if (withStudents) {
// JPA Lazy load
int size = subjectClass.getStudents().size();
logger.debug("Class {} has {} students",subjectClass,size);
}else {
logger.debug("Class {} no students requested",subjectClass);
}
return subjectClass;
}
return null;
}
/**
* Save.
*
* @param item the item
* @return the subject class
*/
@Transactional(readOnly = false)
public SubjectClass save(SubjectClass item) {
subjectClassRepository.save(item);
return item;
}
/**
* Save student to class.
*
* @param classId the class id
* @param studentId the student id
*/
@Transactional(readOnly = false)
public void saveStudentToClass(Integer classId, Integer studentId) {
subjectClassRepository.addStudentToClass(classId, studentId);
}
/**
* Delete.
*
* @param id the id
*/
@Transactional(readOnly = false)
public void delete(Integer id) {
subjectClassRepository.deleteById(id);
}
/**
* Delete student from class.
*
* @param classId the class id
* @param studentId the student id
*/
@Transactional(readOnly = false)
public void deleteStudentFromClass(Integer classId, Integer studentId) {
subjectClassRepository.deleteStudentToClass(classId, studentId);
}
}