1 files changed, 79 insertions, 0 deletions
diff --git a/src/main/java/gregtech/api/util/item/ItemHolder.java b/src/main/java/gregtech/api/util/item/ItemHolder.java
new file mode 100644
index 0000000000..4675d0ba0e
--- /dev/null
+++ b/src/main/java/gregtech/api/util/item/ItemHolder.java
@@ -0,0 +1,79 @@
+package gregtech.api.util.item;
+
+import static net.minecraftforge.oredict.OreDictionary.getOreIDs;
+
+import java.util.Arrays;
+
+import javax.annotation.Nonnull;
+
+import net.minecraft.init.Items;
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.NBTTagCompound;
+
+import gregtech.api.util.GT_Utility;
+
+public class ItemHolder {
+
+    private final Item item;
+    private final int meta;
+    private final NBTTagCompound tag;
+    private final int[] oreIDs;
+
+    public ItemHolder(@Nonnull ItemStack item) {
+        this.item = item.getItem();
+        this.meta = Items.feather.getDamage(item);
+        this.tag = item.getTagCompound();
+        this.oreIDs = getOreIDs(item);
+    }
+
+    public Item getItem() {
+        return item;
+    }
+
+    public int getMeta() {
+        return meta;
+    }
+
+    public NBTTagCompound getNBT() {
+        return tag;
+    }
+
+    public int[] getOreDictTagIDs() {
+        return oreIDs;
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other == this) return true;
+        if (!(other instanceof ItemHolder otherIH)) return false;
+        if (Arrays.stream(oreIDs)
+            .anyMatch(id -> {
+                for (int i = 0; i < otherIH.getOreDictTagIDs().length; i++) {
+                    if (id == otherIH.getOreDictTagIDs()[i]) return true;
+                }
+                return false;
+            })) {
+            return true;
+        }
+
+        if (item != otherIH.getItem() || meta != otherIH.getMeta()) {
+            return false;
+        }
+        if (this.tag == null && otherIH.getNBT() == null) return true;
+        if (this.tag == null || otherIH.getNBT() == null) return false;
+        return this.tag.equals(otherIH);
+    }
+
+    @Override
+    public int hashCode() {
+        return GT_Utility.stackToInt(toStack());
+    }
+
+    @Nonnull
+    private ItemStack toStack() {
+        ItemStack item = new ItemStack(this.item, 1, meta);
+        item.stackTagCompound = tag;
+        return item;
+    }
+}