[W5D5] (ArndtED) Adds methods for finding address by id or email

student-address-service/src/main/java/service/student/studentaddressservice/repository/StudentAddressRepository.java

 package service.student.studentaddressservice.repository;
 
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
 import service.student.studentaddressservice.model.StudentAddress;
 
 @Repository
 public interface StudentAddressRepository extends JpaRepository<StudentAddress, Long> {
 
+    @Query("select u from StudentAddress u where u.email = ?1")
+    StudentAddress findByEmail(String email);
 }

student-address-service/src/main/java/service/student/studentaddressservice/service/StudentAddressService.java

+package service.student.studentaddressservice.service;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.domain.Example;
+import org.springframework.stereotype.Repository;
+import org.springframework.stereotype.Service;
+import service.student.studentaddressservice.model.StudentAddress;
+import service.student.studentaddressservice.repository.StudentAddressRepository;
+
+import java.util.Optional;
+
+@Service
+public class StudentAddressService {
+
+    @Autowired
+    StudentAddressRepository studentAddressRepository;
+
+    public Optional<StudentAddress> getStudentAddressById(long addressId){
+        return studentAddressRepository.findById(addressId);
+    }
+
+    public Optional<StudentAddress> getStudentAddressByEmail(String email){
+        return Optional.ofNullable(studentAddressRepository.findByEmail(email));
+    }
+}