Added getter and setter for the entity in GoalSelector

src/main/java/net/minestom/server/entity/EntityCreature.java

@@ -22,13 +22,12 @@ import org.jetbrains.annotations.Nullable;
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.concurrent.locks.ReentrantLock;
 import java.util.function.Supplier;
 
 public abstract class EntityCreature extends LivingEntity implements NavigableEntity {
 
     // TODO all pathfinding requests should be process in another thread
-    private final ReentrantLock pathLock = new ReentrantLock();
+    private final Object pathLock = new Object();
 
     private final PFPathingEntity pathingEntity = new PFPathingEntity(this);
     private HydrazinePathFinder pathFinder;
@@ -315,17 +314,16 @@ public abstract class EntityCreature extends LivingEntity implements NavigableEn
 
     @Override
     public void pathFindingTick(float speed) {
-        this.pathLock.lock();
-        NavigableEntity.super.pathFindingTick(speed);
-        this.pathLock.unlock();
+        synchronized (pathLock){
+            NavigableEntity.super.pathFindingTick(speed);
+        }
     }
 
     @Override
     public boolean setPathTo(@Nullable Position position) {
-        this.pathLock.lock();
-        final boolean result = NavigableEntity.super.setPathTo(position);
-        this.pathLock.unlock();
-        return result;
+        synchronized (pathLock){
+            return NavigableEntity.super.setPathTo(position);
+        }
     }
 
     @Nullable

src/main/java/net/minestom/server/entity/ai/GoalSelector.java

@@ -7,7 +7,7 @@ import org.jetbrains.annotations.Nullable;
 
 public abstract class GoalSelector {
 
-    protected final EntityCreature entityCreature;
+    protected EntityCreature entityCreature;
 
     public GoalSelector(@NotNull EntityCreature entityCreature) {
         this.entityCreature = entityCreature;
@@ -59,4 +59,27 @@ public abstract class GoalSelector {
         }
         return null;
     }
+
+    /**
+     * Gets the entity behind the goal selector.
+     *
+     * @return the entity
+     */
+    @NotNull
+    public EntityCreature getEntityCreature() {
+        return entityCreature;
+    }
+
+    /**
+     * Changes the entity affected by the goal selector.
+     * <p>
+     * WARNING: this does not add the goal selector to {@code entityCreature},
+     * this only change the internal entity field. Be sure to remove the goal from
+     * the previous entity and add it to the new one using {@link EntityCreature#getGoalSelectors()}.
+     *
+     * @param entityCreature the new affected entity
+     */
+    public void setEntityCreature(@NotNull EntityCreature entityCreature) {
+        this.entityCreature = entityCreature;
+    }
 }