Implemento el metodo nuevoViaje() y la nueva estructura de ReservaRepository

src/main/java/com/carpooling/carpoolingaoraha/entidades/Reserva.java

@@ -11,7 +11,7 @@ import com.carpooling.carpoolingaoraha.entidades.*;
 import jakarta.persistence.*;
 
 @Entity
-@Table (name = "Reservas")
+@Table (name = "reservas")
 public class Reserva {
     @Transient
     private static int incrementaReserva = 0;
@@ -47,6 +47,10 @@ public class Reserva {
         this.pasajeros = new ArrayList<String>();
     }
 
+    public void nuevoViaje(Viaje v)
+    {
+        this.viaje = v;
+    }
     public void anadirPasajeros(String DNI, int idReserva){
         for(int i=0; i<this.sistema.getReservas().size(); i++){
             if(idReserva == this.sistema.getReservas().get(i).getIdReserva()){

src/main/java/com/carpooling/carpoolingaoraha/repositorios/ReservaRepository.java

 package com.carpooling.carpoolingaoraha.repositorios;
 
 import com.carpooling.carpoolingaoraha.entidades.Reserva;
+import com.carpooling.carpoolingaoraha.entidades.Viaje;
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.PersistenceContext;
+import org.springframework.cache.annotation.CacheEvict;
+import org.springframework.cache.annotation.Cacheable;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+import org.springframework.transaction.annotation.Propagation;
+import org.springframework.transaction.annotation.Transactional;
 
-public interface ReservaRepository extends JpaRepository<Reserva, Integer> {
-    Reserva findByIdReserva(Integer idReserva);
+import java.util.Optional;
+
+@Repository
+@Transactional(propagation = Propagation.REQUIRED)
+public class ReservaRepository {
+    @PersistenceContext
+    EntityManager em;
+
+    @Cacheable("reservas")
+    @Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
+    public Optional<Reserva> buscar(String idReserva)
+    {
+        return Optional.ofNullable(em.find(Reserva.class,idReserva));
+    }
+
+    @CacheEvict(value="reservas", key = "#reserva.idReserva")
+    public void guardar(Reserva reserva)
+    {
+        em.persist(reserva);
+    }
+
+    @CacheEvict(value="reservas", key = "#reserva.idReserva")
+    public void nuevoViaje(Reserva reserva, Viaje viaje){
+        em.persist(viaje);
+
+        reserva = em.merge(reserva);
+        reserva.nuevoViaje(viaje);
+    }
+
+    @CacheEvict(value="reservas", key = "#reserva.idReserva")
+    public void actualizar(Reserva reserva)
+    {
+        em.merge(reserva);
+    }
 }