University-of-Basel-Studentprojects/Programmierprojekt
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Fix: 'Potential null pointer access'

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This commit is contained in:
Lars Simon Winzer
2026-03-12 19:27:29 +01:00
parent db7892d9c4
commit e1029932d8
1 changed files with 2 additions and 0 deletions
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src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/EventBus.java
+2
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@@ -2,6 +2,7 @@ package ch.unibas.dmi.dbis.cs108.casono.server.network;
import java.util.List; import java.util.List;
import java.util.Map; import java.util.Map;
import java.util.Objects;
import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArrayList; import java.util.concurrent.CopyOnWriteArrayList;
import java.util.function.Consumer; import java.util.function.Consumer;
@@ -16,6 +17,7 @@ public class EventBus {
} }
public <T extends Event> void publish(T event) { public <T extends Event> void publish(T event) {
Objects.requireNonNull(event, "event must not be null");
List<Consumer<Object>> subscribers = handlers.get(event.getClass()); List<Consumer<Object>> subscribers = handlers.get(event.getClass());
if (subscribers != null) { if (subscribers != null) {
subscribers.forEach(h -> h.accept(event)); subscribers.forEach(h -> h.accept(event));