src/main/java/com/primefactorsolutions/views/EmployeesListView.java

@@ -7,6 +7,7 @@ import com.vaadin.flow.component.combobox.ComboBox;
 import com.vaadin.flow.component.html.H2;
 import com.vaadin.flow.component.html.Main;
 import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
+import com.vaadin.flow.component.notification.Notification;
 import com.vaadin.flow.router.PageTitle;
 import com.vaadin.flow.router.Route;
 import com.vaadin.flow.spring.annotation.SpringComponent;
@@ -98,16 +99,28 @@ public class EmployeesListView extends Main {
 
     private Button createNavigationButton(String label, int increment) {
         Button button = new Button(label);
-        button.addClickListener(event -> changePage(increment));
+        button.addClickListener(event -> handlePageChange(increment));
         return button;
     }
-    private void changePage(int increment) {
-        if (increment < 0 && currentPage > 1) {
-            currentPage--;
-        } else if (increment > 0 && employeeService.hasNextPage(currentPage, pageSize, sortField, ascending)) {
-            currentPage++;
-        }
+    private void handlePageChange(int increment) {
+        if (isPageChangeValid(increment)) {
+            currentPage += increment;
             updateGrid();
+        } else {
+            showNotification("No existen más datos en lista.");
+        }
+    }
+    private boolean isPageChangeValid(int increment) {
+        if (increment < 0) {
+            return currentPage > 1;
+        } else if (increment > 0) {
+            return employeeService.hasNextPage(currentPage, pageSize, sortField, ascending);
+        }
+        return false;
+    }
+    private void showNotification(String message) {
+        Notification notification = new Notification(message, 3000, Notification.Position.BOTTOM_END);
+        notification.open();
     }
     private Button createAddEmployeeButton() {
         return new Button("Add Employee", event ->
@@ -117,7 +130,5 @@ public class EmployeesListView extends Main {
     private void updateGrid() {
         Page<Employee> page = employeeService.getEmployeesPaginated(currentPage, pageSize, sortField, ascending);
         grid.setItems(page.getContent());
-        previous.setEnabled(currentPage > 1);
-        next.setEnabled(page.hasNext());
     }
 }