feat(application): validation annotation

application/src/main/java/cz/muni/pa165/data/model/Application.java

@@ -2,6 +2,10 @@ package cz.muni.pa165.data.model;
 
 import cz.muni.pa165.data.enums.ApplicationStatusEnum;
 import jakarta.persistence.*;
+import jakarta.validation.constraints.FutureOrPresent;
+import jakarta.validation.constraints.NotEmpty;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Past;
 
 import java.io.Serializable;
 import java.time.LocalDate;
@@ -15,14 +19,25 @@ import java.util.Objects;
 public class Application implements Serializable {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @NotNull
     private Long id;
 
     @Enumerated(EnumType.STRING)
+    @NotNull
     private ApplicationStatusEnum status;
+
+    @NotEmpty
     private String name;
+
+    @NotEmpty
     private String surname;
+
+    @Past
+    @NotNull
     private LocalDate birthday;
+
     @Column(name = "filling_out_date")
+    @FutureOrPresent
     private LocalDate fillingOutDate;
 
     public Application() {}