[d3cf3a1] | 1 | package project.educatum.service.impl;
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| 2 |
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| 3 | import org.springframework.stereotype.Service;
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| 4 | import project.educatum.model.Listening;
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| 5 | import project.educatum.model.Payment;
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| 6 | import project.educatum.model.Teacher;
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| 7 | import project.educatum.model.exceptions.PaymentNotFoundException;
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| 8 | import project.educatum.model.exceptions.TeacherNotFoundException;
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| 9 | import project.educatum.repository.ListeningRepository;
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| 10 | import project.educatum.repository.PaymentRepository;
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| 11 | import project.educatum.repository.TeacherRepository;
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| 12 | import project.educatum.service.*;
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| 13 |
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| 14 | import javax.persistence.EntityManager;
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| 15 | import javax.persistence.PersistenceContext;
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| 16 | import java.util.ArrayList;
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| 17 | import java.util.List;
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| 18 |
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| 19 | @Service
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| 20 | public class PaymentServiceImpl implements PaymentService {
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| 21 |
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| 22 | private final ListeningService listeningService;
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| 23 | private final TeacherService teacherService;
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| 24 | private final TeacherStudentService teacherStudentService;
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| 25 | private final ClassService classService;
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| 26 | private final TeacherRepository teacherRepository;
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| 27 | private final PaymentRepository paymentRepository;
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| 28 | private final ListeningRepository listeningRepository;
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| 29 |
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| 30 | @PersistenceContext
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| 31 | private EntityManager entityManager;
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| 32 |
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| 33 | public PaymentServiceImpl(ListeningService listeningService, TeacherService teacherService, TeacherStudentService teacherStudentService, ClassService classService, TeacherRepository teacherRepository, PaymentRepository paymentRepository, ListeningRepository listeningRepository) {
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| 34 | this.listeningService = listeningService;
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| 35 | this.teacherService = teacherService;
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| 36 | this.teacherStudentService = teacherStudentService;
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| 37 | this.classService = classService;
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| 38 | this.teacherRepository = teacherRepository;
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| 39 | this.paymentRepository = paymentRepository;
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| 40 | this.listeningRepository = listeningRepository;
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| 41 | }
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| 42 |
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| 43 | @Override
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| 44 | public void addPayment(Integer teacherID, Integer price, Integer classID, Integer studentID) {
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| 45 | Teacher teacher = teacherRepository.findById(teacherID).orElseThrow(TeacherNotFoundException::new);
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| 46 | Integer owes = studentTeacherLoan(studentID, teacher.getId());
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| 47 | if (owes != 0) {
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| 48 | List<Listening> listeningList = listeningRepository.findAllByClassAndStudent(classID, studentID);
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| 49 | Integer paymentID = listeningList.get(0).getIdPayment().getId();
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| 50 | Payment p = paymentRepository.findById(paymentID).orElseThrow(PaymentNotFoundException::new);
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| 51 | paymentRepository.updatePrice(price, p.getId());
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| 52 | }
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| 53 | }
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| 54 |
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| 55 | @Override
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| 56 | public List<Object[]> getListenedClassesQuery() {
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| 57 | javax.persistence.Query q = entityManager.createNativeQuery(
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| 58 | """
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| 59 | select distinct q3.ucenik1 id_ucenik, q3.id_nastavnik id_nastavnik,
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| 60 | q3.slusanicasovi slusani_casovi
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| 61 | from
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| 62 | (
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| 63 | select * from
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| 64 | (
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| 65 |
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| 66 | select u.id_ucenik ucenik1, u.ime, n.id_nastavnik nastavnik1, count(s.id_cas || '-' || s.id_slusanje) slusanicasovi
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| 67 | from project.ucenici u\s
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| 68 | join project.slusanje s on s.id_ucenik = u.id_ucenik\s
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| 69 | join project.casovi c on c.id_cas = s.id_cas\s
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| 70 | join project.nastavnici n on n.id_nastavnik = c.id_nastavnik\s
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| 71 | group by 1,2,3
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| 72 | \s
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| 73 | \s
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| 74 | \s
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| 75 | )q1
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| 76 |
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| 77 |
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| 78 | join
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| 79 | \s
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| 80 | (
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| 81 | select c.id_cas,n.id_nastavnik as id_nastavnik,n.ime,s.id_ucenik ucenik2, s.id_slusanje id_slusanje2 from project.casovi c
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| 82 | join project.slusanje s on s.id_cas=c.id_cas
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| 83 | join project.nastavnici n on n.id_nastavnik=c.id_nastavnik
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| 84 | ) q2 on
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| 85 | q1.ucenik1=q2.ucenik2
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| 86 | and q1.nastavnik1=q2.id_nastavnik)q3
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| 87 | """
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| 88 | );
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| 89 | return q.getResultList();
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| 90 | }
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| 91 |
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| 92 |
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| 93 | @Override
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| 94 | public List<Object[]> getPaymentsQuery() {
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| 95 | javax.persistence.Query q = entityManager.createNativeQuery(
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| 96 | """
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| 97 | select q4.id_nastavnik1 as id_nastavnik,q4.nastavnik,\s
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| 98 | q4.id_ucenik1 as id_ucenik, q4.ucenik as ime_ucenik, sum(q4.dolzi) as dolzi from (
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| 99 | \s
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| 100 | \s
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| 101 | \s
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| 102 | \s
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| 103 | select q3.id_nastavnik1, q3.nastavnik1 || ' ' || q3.nastavnik_prezime1 as nastavnik,
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| 104 | q3.id_ucenik1,q3.ime_ucenik1 as ucenik, (q3.vkupno_za_plakjanje-q3.plateno) as dolzi
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| 105 | from
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| 106 | (
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| 107 | select * from
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| 108 | \s
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| 109 | (
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| 110 | select n.id_nastavnik as id_nastavnik1,n.ime as nastavnik1, n.prezime nastavnik_prezime1,
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| 111 | u.id_ucenik as id_ucenik1,u.ime || ' ' || u.prezime ime_ucenik1,
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| 112 | sum(pl.iznos) as plateno from
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| 113 | project.nastavnici n\s
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| 114 | join project.plakjanja pl on pl.id_nastavnik = n.id_nastavnik\s
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| 115 | join project.casovi c on c.id_nastavnik = pl.id_nastavnik\s
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| 116 | join project.slusanje s on s.id_cas = c.id_cas\s
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| 117 | and s.id_plakjanja = pl.id_plakjanja\s
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| 118 | join project.ucenici u on u.id_ucenik = s.id_ucenik\s
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| 119 | group by 1,2,3,4
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| 120 | \s
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| 121 | ) q1
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| 122 | \s
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| 123 | join
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| 124 |
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| 125 | (
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| 126 | select n.id_nastavnik as id_nastavnik2,n.ime as nastavnik2, n.prezime nastavnik_prezime2,
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| 127 | u2.id_ucenik as id_ucenik2, u2.ime || ' ' || u2.prezime as ime_ucenik2,
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| 128 | (pn.cena_po_cas * pn.broj_casovi_po_dogovor) vkupno_za_plakjanje from project.ucenici u2
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| 129 | join project.predava_na pn on pn.id_ucenik = u2.id_ucenik
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| 130 | join project.nastavnici n on n.id_nastavnik =pn.id_nastavnik
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| 131 | ) q2
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| 132 | on q1.id_ucenik1 = q2.id_ucenik2 and q2.id_nastavnik2=q1.id_nastavnik1
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| 133 | ) q3
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| 134 | )q4
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| 135 | group by 1,2,3,4
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| 136 | order by id_nastavnik\s
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| 137 |
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| 138 | \s
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| 139 | \s
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| 140 | \s
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| 141 | """);
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| 142 |
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| 143 | return q.getResultList();
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| 144 | }
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| 145 |
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| 146 |
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| 147 | @Override
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| 148 | public Integer studentTeacherLoan(Integer studentId, Integer teacherId) {
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| 149 | List<Object[]> query = getPaymentsQuery();
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| 150 | List<String> payments = new ArrayList<>();
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| 151 | StringBuilder sb = new StringBuilder();
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| 152 | int total = 0;
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| 153 | for (Object[] payment : query) {
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| 154 | sb.setLength(0);
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| 155 | for (int i = 0; i < payment.length; i++) {
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| 156 | String attribute = payment[i].toString();
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| 157 | sb.append(attribute).append(" ");
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| 158 | }
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| 159 | payments.add(sb.toString());
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| 160 | }
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| 161 | for (String p : payments) {
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| 162 | String[] parts = p.split("\\s+");
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| 163 | String idTeacher = parts[0];
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| 164 | String studentID = parts[3];
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| 165 | String owes = parts[6];
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| 166 | if (Integer.valueOf(studentID).equals(studentId)
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| 167 | && Integer.valueOf(idTeacher).equals(teacherId)) {
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| 168 | total += Integer.parseInt(owes);
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| 169 | }
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| 170 | }
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| 171 | if (total < 0) total = 0;
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| 172 | return total;
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| 173 | }
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| 174 |
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| 175 | @Override
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| 176 | public Integer numListenedClasses(Integer idStudent, Integer idTeacher) {
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| 177 | int total = 0;
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| 178 | List<Object[]> query = getListenedClassesQuery();
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| 179 | List<String> listeningList = new ArrayList<>();
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| 180 | StringBuilder sb = new StringBuilder();
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| 181 | for (Object[] l : query) {
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| 182 | sb.setLength(0);
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| 183 | for (int i = 0; i < l.length; i++) {
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| 184 | String attribute = l[i].toString();
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| 185 | sb.append(attribute).append(" ");
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| 186 | }
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| 187 | listeningList.add(sb.toString());
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| 188 | }
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| 189 | for (String s : listeningList) {
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| 190 | String[] parts = s.split("\\s+");
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| 191 | String idU = parts[0];
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| 192 | String idN = parts[1];
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| 193 | String numClasses = parts[2];
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| 194 | if (Integer.valueOf(idU).equals(idStudent) && Integer.valueOf(idN).equals(idTeacher))
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| 195 | total += Integer.parseInt(numClasses);
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| 196 | }
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| 197 | if (total < 0) total = 0;
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| 198 | return total;
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| 199 | }
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| 200 |
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| 201 | }
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