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Prevent a node from having its parent as child

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This commit is contained in:
TheMode 2021-06-03 09:47:48 +02:00
parent 8d284649f4
commit e5031ff37e
1 changed files with 3 additions and 4 deletions
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7
src/main/java/net/minestom/server/event/EventNode.java
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@ -2,12 +2,10 @@ package net.minestom.server.event;
import it.unimi.dsi.fastutil.objects.Object2IntMap; import it.unimi.dsi.fastutil.objects.Object2IntMap;
import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap; import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap;
import net.minestom.server.utils.validate.Check;
import org.jetbrains.annotations.NotNull; import org.jetbrains.annotations.NotNull;
import java.util.Collections; import java.util.*;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArrayList; import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.CopyOnWriteArraySet; import java.util.concurrent.CopyOnWriteArraySet;
@ -110,6 +108,7 @@ public class EventNode<T extends Event> {
public EventNode<T> addChild(@NotNull EventNode<? extends T> child) { public EventNode<T> addChild(@NotNull EventNode<? extends T> child) {
synchronized (GLOBAL_CHILD_LOCK) { synchronized (GLOBAL_CHILD_LOCK) {
Check.stateCondition(Objects.equals(parent, child), "Cannot have a child as parent");
final boolean result = this.children.add((EventNode<T>) child); final boolean result = this.children.add((EventNode<T>) child);
if (result) { if (result) {
child.parent = this; child.parent = this;