1 files changed, 53 insertions, 0 deletions
diff --git a/src/main/java/me/shedaniel/rei/client/ItemRegistryImpl.java b/src/main/java/me/shedaniel/rei/client/ItemRegistryImpl.java
new file mode 100644
index 000000000..f61c3d063
--- /dev/null
+++ b/src/main/java/me/shedaniel/rei/client/ItemRegistryImpl.java
@@ -0,0 +1,53 @@
+package me.shedaniel.rei.client;
+
+import com.google.common.collect.Lists;
+import me.shedaniel.rei.api.ItemRegistry;
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
+import net.minecraft.item.Items;
+import net.minecraft.util.DefaultedList;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.TreeSet;
+import java.util.stream.Collectors;
+
+public class ItemRegistryImpl implements ItemRegistry {
+    
+    private final List<ItemStack> itemList = Lists.newLinkedList();
+    
+    @Override
+    public List<ItemStack> getItemList() {
+        return Collections.unmodifiableList(itemList);
+    }
+    
+    @Deprecated
+    @Override
+    public List<ItemStack> getModifiableItemList() {
+        return itemList;
+    }
+    
+    @Override
+    public ItemStack[] getAllStacksFromItem(Item item) {
+        DefaultedList<ItemStack> list = DefaultedList.create();
+        list.add(item.getDefaultStack());
+        item.appendItemsForGroup(item.getItemGroup(), list);
+        TreeSet<ItemStack> stackSet = list.stream().collect(Collectors.toCollection(() -> new TreeSet<ItemStack>((p1, p2) -> ItemStack.areEqual(p1, p2) ? 0 : 1)));
+        return Lists.newArrayList(stackSet).toArray(new ItemStack[0]);
+    }
+    
+    @Override
+    public void registerItemStack(Item afterItem, ItemStack stack) {
+        if (!stack.isEmpty() && !alreadyContain(stack))
+            if (afterItem == null || afterItem.equals(Items.AIR))
+                itemList.add(stack);
+            else {
+                int last = itemList.size();
+                for(int i = 0; i < itemList.size(); i++)
+                    if (itemList.get(i).getItem().equals(afterItem))
+                        last = i + 1;
+                itemList.add(last, stack);
+            }
+    }
+    
+}