made events immutable, removed group-setters -> changed tests to work without setters.

src/main/java/mops/gruppen2/domain/Group.java

@@ -1,13 +1,8 @@
 package mops.gruppen2.domain;
 
-import lombok.Data;
 import lombok.EqualsAndHashCode;
+import lombok.Getter;
 import mops.gruppen2.domain.event.*;
-import mops.gruppen2.domain.event.AddUserEvent;
-import mops.gruppen2.domain.event.CreateGroupEvent;
-import mops.gruppen2.domain.event.UpdateGroupDescriptionEvent;
-import mops.gruppen2.domain.event.UpdateGroupTitleEvent;
-import mops.gruppen2.domain.event.DeleteUserEvent;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -15,7 +10,7 @@ import java.util.List;
 import java.util.Map;
 
 @EqualsAndHashCode(callSuper=false)
-@Data
+@Getter
 public class Group extends Aggregate {
 	long id;
 	String title;
@@ -23,7 +18,7 @@ public class Group extends Aggregate {
 	List<User> members;
 	Map<User, Role> roles;
 
-	public void applyEvent(CreateGroupEvent event){
+	private void applyEvent(CreateGroupEvent event){
 		this.id = event.getGroup_id();
 		this.title = event.getGroupTitle();
 		this.description = event.getGroupDescription();
@@ -31,7 +26,7 @@ public class Group extends Aggregate {
 		this.roles = new HashMap<>();
 	}
 
-	public void applyEvent(UpdateRoleEvent event) {
+	private void applyEvent(UpdateRoleEvent event) {
 		members.stream()
 				.filter(user -> user.getUser_id().equals(event.getUser_id()))
 				.findFirst()
@@ -39,26 +34,21 @@ public class Group extends Aggregate {
 						() -> System.out.println("UserNotFoundException"));
 	}
 
-	public void  applyEvent(AddUserEvent event){
-		User user = new User();
-
-		user.setUser_id(event.getUser_id());
-		user.setGivenname(event.getGivenname());
-		user.setFamilyname(event.getFamilyname());
-		user.setEmail(event.getEmail());
+	private void applyEvent(AddUserEvent event){
+		User user = new User(event.getUser_id(), event.getGivenname(), event.getFamilyname(), event.getEmail());
 
 		this.members.add(user);
 	}
 
-	public void applyEvent(UpdateGroupTitleEvent event) {
+	private void applyEvent(UpdateGroupTitleEvent event) {
 		this.title = event.getNewGroupTitle();
 	}
 
-	public void applyEvent(UpdateGroupDescriptionEvent event) {
+	private void applyEvent(UpdateGroupDescriptionEvent event) {
 		this.description = event.getNewGroupDescription();
 	}
 
-	public void applyEvent(DeleteUserEvent event) {
+	private void applyEvent(DeleteUserEvent event) {
 		for (User user : members) {
 			if (user.getUser_id().equals(event.getUser_id())) {
 				this.members.remove(user);

src/main/java/mops/gruppen2/domain/event/AddUserEvent.java

@@ -1,8 +1,11 @@
 package mops.gruppen2.domain.event;
 
-import lombok.Getter;
+import lombok.EqualsAndHashCode;
+import lombok.Value;
+import mops.gruppen2.domain.User;
 
-@Getter
+@EqualsAndHashCode(callSuper = true)
+@Value
 public class AddUserEvent extends Event{
 	String givenname, familyname, email;
 
@@ -12,4 +15,11 @@ public class AddUserEvent extends Event{
 		this.familyname = familyname;
 		this.email = email;
 	}
+
+	public AddUserEvent(long event_id, long group_id, User user) {
+		super(event_id, group_id, user.getUser_id());
+		this.givenname = user.getGivenname();
+		this.familyname = user.getFamilyname();
+		this.email = user.getEmail();
+	}
 }

src/main/java/mops/gruppen2/domain/event/CreateGroupEvent.java

@@ -1,11 +1,12 @@
 package mops.gruppen2.domain.event;
 
-import lombok.Getter;
+import lombok.EqualsAndHashCode;
+import lombok.Value;
 
-@Getter
+@EqualsAndHashCode(callSuper = true)
+@Value
 public class CreateGroupEvent extends Event {
-	String groupTitle;
-	String groupDescription;
+	String groupTitle, groupDescription;
 
 	public CreateGroupEvent(long event_id, long group_id, String user_id, String groupTitle, String groupDescription) {
 		super(event_id, group_id, user_id);

src/main/java/mops/gruppen2/domain/event/DeleteUserEvent.java

@@ -1,8 +1,10 @@
 package mops.gruppen2.domain.event;
 
-import lombok.Getter;
+import lombok.EqualsAndHashCode;
+import lombok.Value;
 
-@Getter
+@EqualsAndHashCode(callSuper = true)
+@Value
 public class DeleteUserEvent extends Event{
 
     public DeleteUserEvent(long event_id, long group_id, String user_id) {

src/main/java/mops/gruppen2/domain/event/Event.java

@@ -1,10 +1,10 @@
 package mops.gruppen2.domain.event;
 
-import lombok.AllArgsConstructor;
-import lombok.Getter;
+import lombok.Value;
+import lombok.experimental.NonFinal;
 
-@Getter
-@AllArgsConstructor
+@Value
+@NonFinal
 public class Event {
 	long event_id;
 	long group_id;

src/main/java/mops/gruppen2/domain/event/UpdateGroupDescriptionEvent.java

@@ -1,8 +1,10 @@
 package mops.gruppen2.domain.event;
 
-import lombok.Getter;
+import lombok.EqualsAndHashCode;
+import lombok.Value;
 
-@Getter
+@EqualsAndHashCode(callSuper = true)
+@Value
 public class UpdateGroupDescriptionEvent extends Event {
     String newGroupDescription;
 

src/main/java/mops/gruppen2/domain/event/UpdateGroupTitleEvent.java

@@ -1,8 +1,10 @@
 package mops.gruppen2.domain.event;
 
-import lombok.Getter;
+import lombok.EqualsAndHashCode;
+import lombok.Value;
 
-@Getter
+@EqualsAndHashCode(callSuper = true)
+@Value
 public class UpdateGroupTitleEvent extends Event {
     String newGroupTitle;
 

src/main/java/mops/gruppen2/domain/event/UpdateRoleEvent.java

@@ -1,12 +1,14 @@
 package mops.gruppen2.domain.event;
 
-import lombok.Getter;
+import lombok.EqualsAndHashCode;
+import lombok.Value;
 import mops.gruppen2.domain.Role;
 
-@Getter
+@EqualsAndHashCode(callSuper = true)
+@Value
 public class UpdateRoleEvent extends Event {
 
-    private final Role newRole;
+    Role newRole;
 
     public UpdateRoleEvent(long event_id, long group_id, String user_id, Role newRole) {
         super(event_id, group_id, user_id);