Use try-with-res. in EmployeeDatabaseDAO #25963

1 files changed, 38 insertions, 33 deletions

diff --git a/src/main/java/at/ac/tuwien/sepm/assignment/groupphase/einsatzverwaltung/dao/EmployeeDatabaseDAO.java b/src/main/java/at/ac/tuwien/sepm/assignment/groupphase/einsatzverwaltung/dao/EmployeeDatabaseDAO.java
index fd0add7..43a5c9d 100644
--- a/src/main/java/at/ac/tuwien/sepm/assignment/groupphase/einsatzverwaltung/dao/EmployeeDatabaseDAO.java
+++ b/src/main/java/at/ac/tuwien/sepm/assignment/groupphase/einsatzverwaltung/dao/EmployeeDatabaseDAO.java
@@ -76,17 +76,19 @@ public class EmployeeDatabaseDAO implements EmployeeDAO {
             insertEmployeeVersion.setBoolean(4, employee.isDriver());
             insertEmployeeVersion.setBoolean(5, employee.isPilot());
             insertEmployeeVersion.executeUpdate();
-            ResultSet resultSetEmployeeVersion = insertEmployeeVersion.getGeneratedKeys();
-            if (resultSetEmployeeVersion.next()) {
-                long versionId = resultSetEmployeeVersion.getLong(1);
+            try (ResultSet resultSetEmployeeVersion = insertEmployeeVersion.getGeneratedKeys()) {
+                if (resultSetEmployeeVersion.next()) {
+                    long versionId = resultSetEmployeeVersion.getLong(1);
 
-                insertEmployee.setLong(1, versionId);
-                insertEmployee.executeUpdate();
+                    insertEmployee.setLong(1, versionId);
+                    insertEmployee.executeUpdate();
 
-                ResultSet resultSetEmployee = insertEmployee.getGeneratedKeys();
-                if (resultSetEmployee.next()) {
-                    connection.commit();
-                    return resultSetEmployee.getLong(1);
+                    try (ResultSet resultSetEmployee = insertEmployee.getGeneratedKeys()) {
+                        if (resultSetEmployee.next()) {
+                            connection.commit();
+                            return resultSetEmployee.getLong(1);
+                        }
+                    }
                 }
             }
 
@@ -125,20 +127,21 @@ public class EmployeeDatabaseDAO implements EmployeeDAO {
             insertEmployeeVersion.setBoolean(4, employee.isDriver());
             insertEmployeeVersion.setBoolean(5, employee.isPilot());
             insertEmployeeVersion.executeUpdate();
-            ResultSet resultSetEmployeeVersion = insertEmployeeVersion.getGeneratedKeys();
+            try (ResultSet resultSetEmployeeVersion = insertEmployeeVersion.getGeneratedKeys()) {
 
-            if (resultSetEmployeeVersion.next()) {
-                long versionId = resultSetEmployeeVersion.getLong(1);
+                if (resultSetEmployeeVersion.next()) {
+                    long versionId = resultSetEmployeeVersion.getLong(1);
 
-                updateEmployee.setLong(1, versionId);
-                updateEmployee.setLong(2, employee.id());
-                int affectedRows = updateEmployee.executeUpdate();
+                    updateEmployee.setLong(1, versionId);
+                    updateEmployee.setLong(2, employee.id());
+                    int affectedRows = updateEmployee.executeUpdate();
 
-                if (affectedRows == 1) {
-                    connection.commit();
-                } else {
-                    throw new ElementNotFoundException(
-                            "element not found with id: " + employee.id());
+                    if (affectedRows == 1) {
+                        connection.commit();
+                    } else {
+                        throw new ElementNotFoundException(
+                                "element not found with id: " + employee.id());
+                    }
                 }
             }
 
@@ -164,22 +167,24 @@ public class EmployeeDatabaseDAO implements EmployeeDAO {
     public Set<Employee> list() throws PersistenceException {
 
         try {
-            ResultSet rs = listEmployee.executeQuery();
+            Set<Employee> employees;
+            try (ResultSet rs = listEmployee.executeQuery()) {
 
-            Set<Employee> employees = new HashSet<>();
-            while (rs.next()) {
+                employees = new HashSet<>();
+                while (rs.next()) {
 
-                Employee employee =
-                        Employee.builder()
-                                .id(rs.getLong(1))
-                                .name(rs.getString(2))
-                                .birthday(rs.getTimestamp(3).toLocalDateTime().toLocalDate())
-                                .educationLevel(EducationLevel.valueOf(rs.getString(4)))
-                                .isDriver(rs.getBoolean(5))
-                                .isPilot(rs.getBoolean(6))
-                                .build();
+                    Employee employee =
+                            Employee.builder()
+                                    .id(rs.getLong(1))
+                                    .name(rs.getString(2))
+                                    .birthday(rs.getTimestamp(3).toLocalDateTime().toLocalDate())
+                                    .educationLevel(EducationLevel.valueOf(rs.getString(4)))
+                                    .isDriver(rs.getBoolean(5))
+                                    .isPilot(rs.getBoolean(6))
+                                    .build();
 
-                employees.add(employee);
+                    employees.add(employee);
+                }
             }
 
             return employees;