do not deprecate so hastily!

src/main/java/net/fabricmc/fabric/events/ObjectBuilderEvent.java

@@ -16,7 +16,7 @@
 
 package net.fabricmc.fabric.events;
 
-import net.fabricmc.fabric.impl.util.HandlerArray;
+import net.fabricmc.fabric.util.HandlerArray;
 import net.fabricmc.fabric.util.HandlerRegistry;
 import net.minecraft.block.Block;
 import net.minecraft.item.Item;

src/main/java/net/fabricmc/fabric/events/PlayerInteractionEvent.java

@@ -16,7 +16,7 @@
 
 package net.fabricmc.fabric.events;
 
-import net.fabricmc.fabric.impl.util.HandlerArray;
+import net.fabricmc.fabric.util.HandlerArray;
 import net.fabricmc.fabric.util.HandlerRegistry;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.util.ActionResult;
@@ -74,7 +74,7 @@ public final class PlayerInteractionEvent {
 	public static final HandlerRegistry<Entity> ATTACK_ENTITY = new HandlerArray<>(Entity.class);
 	
 	// TODO: For completeness' sake, but requires us to add a custom packet. Is it worth the complexity?
-	/* public static final HandlerRegistry<Item> ATTACK_ITEM = new HandlerArray<>(); */
+	/* public static final HandlerRegistry<Item> ATTACK_ITEM = new HanderList<>(); */
 
 	/**
 	 * Event emitted when a player interacts with a block.

src/main/java/net/fabricmc/fabric/events/ServerEvent.java

@@ -16,7 +16,7 @@
 
 package net.fabricmc.fabric.events;
 
-import net.fabricmc.fabric.impl.util.HandlerArray;
+import net.fabricmc.fabric.util.HandlerArray;
 import net.fabricmc.fabric.util.HandlerRegistry;
 import net.minecraft.server.MinecraftServer;
 

src/main/java/net/fabricmc/fabric/events/TickEvent.java

@@ -16,7 +16,7 @@
 
 package net.fabricmc.fabric.events;
 
-import net.fabricmc.fabric.impl.util.HandlerArray;
+import net.fabricmc.fabric.util.HandlerArray;
 import net.fabricmc.fabric.util.HandlerRegistry;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.util.Profiler;

src/main/java/net/fabricmc/fabric/events/client/ClientTickEvent.java

@@ -17,7 +17,7 @@
 package net.fabricmc.fabric.events.client;
 
 import net.fabricmc.fabric.events.TickEvent;
-import net.fabricmc.fabric.impl.util.HandlerArray;
+import net.fabricmc.fabric.util.HandlerArray;
 import net.fabricmc.fabric.util.HandlerRegistry;
 import net.minecraft.client.MinecraftClient;
 

src/main/java/net/fabricmc/fabric/events/client/SpriteEvent.java

@@ -17,7 +17,7 @@
 package net.fabricmc.fabric.events.client;
 
 import net.fabricmc.fabric.client.texture.SpriteRegistry;
-import net.fabricmc.fabric.impl.util.HandlerArray;
+import net.fabricmc.fabric.util.HandlerArray;
 import net.fabricmc.fabric.util.HandlerRegistry;
 
 public class SpriteEvent {

src/main/java/net/fabricmc/fabric/mixin/client/texture/MixinSpriteAtlasTexture.java

@@ -20,7 +20,7 @@ import com.google.common.base.Joiner;
 import net.fabricmc.fabric.client.texture.*;
 import net.fabricmc.fabric.impl.client.texture.FabricSprite;
 import net.fabricmc.fabric.events.client.SpriteEvent;
-import net.fabricmc.fabric.impl.util.HandlerArray;
+import net.fabricmc.fabric.util.HandlerArray;
 import net.minecraft.class_1050;
 import net.minecraft.client.MinecraftClient;
 import net.minecraft.client.resource.metadata.AnimationResourceMetadata;

src/main/java/net/fabricmc/fabric/mixin/events/objectbuilder/MixinBlock.java

@@ -17,7 +17,7 @@
 package net.fabricmc.fabric.mixin.events.objectbuilder;
 
 import net.fabricmc.fabric.events.ObjectBuilderEvent;
-import net.fabricmc.fabric.impl.util.HandlerArray;
+import net.fabricmc.fabric.util.HandlerArray;
 import net.minecraft.block.Block;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;

src/main/java/net/fabricmc/fabric/mixin/events/objectbuilder/MixinItem.java

@@ -17,7 +17,7 @@
 package net.fabricmc.fabric.mixin.events.objectbuilder;
 
 import net.fabricmc.fabric.events.ObjectBuilderEvent;
-import net.fabricmc.fabric.impl.util.HandlerArray;
+import net.fabricmc.fabric.util.HandlerArray;
 import net.minecraft.item.Item;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;

src/main/java/net/fabricmc/fabric/mixin/events/playerinteraction/MixinClientPlayerInteractionManager.java

@@ -17,7 +17,7 @@
 package net.fabricmc.fabric.mixin.events.playerinteraction;
 
 import net.fabricmc.fabric.events.PlayerInteractionEvent;
-import net.fabricmc.fabric.impl.util.HandlerArray;
+import net.fabricmc.fabric.util.HandlerArray;
 import net.minecraft.client.MinecraftClient;
 import net.minecraft.client.network.ClientPlayNetworkHandler;
 import net.minecraft.client.network.ClientPlayerEntity;

src/main/java/net/fabricmc/fabric/mixin/events/playerinteraction/MixinServerPlayNetworkHandler.java

@@ -17,7 +17,7 @@
 package net.fabricmc.fabric.mixin.events.playerinteraction;
 
 import net.fabricmc.fabric.events.PlayerInteractionEvent;
-import net.fabricmc.fabric.impl.util.HandlerArray;
+import net.fabricmc.fabric.util.HandlerArray;
 import net.minecraft.server.network.ServerPlayNetworkHandler;
 import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.server.network.packet.PlayerInteractEntityServerPacket;

src/main/java/net/fabricmc/fabric/mixin/events/playerinteraction/MixinServerPlayerEntity.java

@@ -17,7 +17,7 @@
 package net.fabricmc.fabric.mixin.events.playerinteraction;
 
 import net.fabricmc.fabric.events.PlayerInteractionEvent;
-import net.fabricmc.fabric.impl.util.HandlerArray;
+import net.fabricmc.fabric.util.HandlerArray;
 import net.minecraft.entity.Entity;
 import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.util.ActionResult;

src/main/java/net/fabricmc/fabric/mixin/events/playerinteraction/MixinServerPlayerInteractionManager.java

@@ -17,7 +17,7 @@
 package net.fabricmc.fabric.mixin.events.playerinteraction;
 
 import net.fabricmc.fabric.events.PlayerInteractionEvent;
-import net.fabricmc.fabric.impl.util.HandlerArray;
+import net.fabricmc.fabric.util.HandlerArray;
 import net.minecraft.client.network.packet.BlockUpdateClientPacket;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;

src/main/java/net/fabricmc/fabric/mixin/events/server/MixinMinecraftServer.java

@@ -17,7 +17,7 @@
 package net.fabricmc.fabric.mixin.events.server;
 
 import net.fabricmc.fabric.events.ServerEvent;
-import net.fabricmc.fabric.impl.util.HandlerArray;
+import net.fabricmc.fabric.util.HandlerArray;
 import net.minecraft.server.MinecraftServer;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;

src/main/java/net/fabricmc/fabric/util/HanderList.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2016, 2017, 2018 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.fabric.util;
+
+import java.lang.reflect.Array;
+
+/**
+ * @deprecated Use HandlerArray.
+ */
+@Deprecated
+public class HanderList<T> implements HandlerRegistry<T> {
+	private final Class tClass;
+	private T[] array;
+
+	@SuppressWarnings("unchecked")
+	public HanderList(Class theClass) {
+		this.tClass = theClass;
+		this.array = (T[]) Array.newInstance(tClass, 0);
+	}
+
+	@Override
+	public void register(T handler) {
+		for (int i = 0; i < array.length; i++) {
+			if (array[i] == handler) {
+				throw new RuntimeException("Handler " + handler + " already registered!");
+			}
+		}
+
+		//noinspection unchecked
+		T[] newArray = (T[]) Array.newInstance(tClass, array.length + 1);
+		System.arraycopy(array, 0, newArray, 0, array.length);
+		newArray[array.length] = handler;
+		array = newArray;
+	}
+
+	public T[] getBackingArray() {
+		return array;
+	}
+}

src/main/java/net/fabricmc/fabric/util/HandlerArray.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package net.fabricmc.fabric.impl.util;
+package net.fabricmc.fabric.util;
 
 import net.fabricmc.fabric.util.HandlerRegistry;