Some sanity checks, get item id by name fast

common/src/main/java/com/viaversion/viaversion/protocols/protocol1_20_5to1_20_3/data/MappingData.java

@@ -18,14 +18,18 @@
 package com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.data;
 
 import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
+import com.github.steveice10.opennbt.tag.builtin.ListTag;
 import com.github.steveice10.opennbt.tag.builtin.StringTag;
 import com.viaversion.viaversion.api.data.MappingDataBase;
 import com.viaversion.viaversion.api.data.MappingDataLoader;
+import it.unimi.dsi.fastutil.objects.Object2IntMap;
+import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap;
 import java.util.ArrayList;
 import java.util.List;
 
 public class MappingData extends MappingDataBase {
 
+    private final Object2IntMap<String> byId = new Object2IntOpenHashMap<>();
     private final List<String> itemIds = new ArrayList<>();
 
     public MappingData() {
@@ -36,14 +40,17 @@ public class MappingData extends MappingDataBase {
     protected void loadExtras(final CompoundTag data) {
         super.loadExtras(data);
 
-        final CompoundTag items = MappingDataLoader.loadNBT("itemIds-1.20.3.nbt");
-        for (final StringTag tag : items.getListTag("items", StringTag.class)) {
+        final ListTag<StringTag> items = MappingDataLoader.loadNBT("itemIds-1.20.3.nbt").getListTag("items", StringTag.class);
+        for (int i = 0; i < items.size(); i++) {
+            final StringTag tag = items.get(i);
             itemIds.add(tag.getValue());
+            byId.put(tag.getValue(), i);
         }
+        byId.defaultReturnValue(-1);
     }
 
     public int itemId(final String name) {
-        return itemIds.indexOf(name);
+        return byId.getInt(name);
     }
 
     public String itemName(final int id) {

common/src/main/java/com/viaversion/viaversion/protocols/protocol1_20_5to1_20_3/rewriter/BlockItemPacketRewriter1_20_5.java

@@ -671,20 +671,29 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
             return;
         }
 
-        final Item[] items = chargedProjectiles.stream().map(this::itemFromTag).toArray(Item[]::new);
+        final Item[] items = chargedProjectiles.stream().map(this::itemFromTag).filter(Objects::nonNull).toArray(Item[]::new);
         data.set(dataKey, items);
     }
 
     private int toItemId(final String id) {
         final int unmappedId = protocol.getMappingData().itemId(Key.stripMinecraftNamespace(id));
-        return protocol.getMappingData().getNewItemId(unmappedId);
+        return unmappedId != -1 ? protocol.getMappingData().getNewItemId(unmappedId) : -1;
     }
 
-    private Item itemFromTag(final CompoundTag item) {
-        final StringTag id = item.getStringTag("id");
-        final NumberTag count = item.getNumberTag("Count");
+    private @Nullable Item itemFromTag(final CompoundTag item) {
+        final String id = item.getString("id");
+        if (id == null) {
+            return null;
+        }
+
+        final int itemId = toItemId(id);
+        if (itemId == -1) {
+            return null;
+        }
+
+        final byte count = item.getByte("Count", (byte) 1);
         final CompoundTag tag = item.getCompoundTag("tag");
-        return handleItemToClient(new DataItem(toItemId(id.getValue()), count.asByte(), (short) 0, tag));
+        return handleItemToClient(new DataItem(itemId, count, (short) 0, tag));
     }
 
     private void updateEnchantments(final StructuredDataContainer data, final CompoundTag tag, final String key,
@@ -746,11 +755,15 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
     private void updateBees(final StructuredDataContainer data, final ListTag<CompoundTag> beesTag) {
         final Bee[] bees = beesTag.stream().map(bee -> {
             final CompoundTag entityData = bee.getCompoundTag("EntityData");
+            if (entityData == null) {
+                return null;
+            }
+
             final int ticksInHive = bee.getInt("TicksInHive");
             final int minOccupationTicks = bee.getInt("MinOccupationTicks");
 
             return new Bee(entityData, ticksInHive, minOccupationTicks);
-        }).toArray(Bee[]::new);
+        }).filter(Objects::nonNull).toArray(Bee[]::new);
 
         data.set(StructuredDataKey.BEES, bees);
     }
@@ -837,7 +850,7 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
             }
 
             final ListTag<StringTag> sherdsTag = tag.getListTag("sherds", StringTag.class);
-            if (sherdsTag != null) {
+            if (sherdsTag != null && sherdsTag.size() == 4) {
                 final String sherd1 = sherdsTag.get(0).getValue();
                 final String sherd2 = sherdsTag.get(1).getValue();
                 final String sherd3 = sherdsTag.get(2).getValue();