1 files changed, 81 insertions, 0 deletions
diff --git a/src/main/java/gregtech/api/objects/GT_HashSet.java b/src/main/java/gregtech/api/objects/GT_HashSet.java
new file mode 100644
index 0000000000..5a88307639
--- /dev/null
+++ b/src/main/java/gregtech/api/objects/GT_HashSet.java
@@ -0,0 +1,81 @@
+package gregtech.api.objects;
+
+import gregtech.api.GregTech_API;
+import gregtech.api.util.GT_Utility;
+
+import java.util.*;
+
+import net.minecraft.item.ItemStack;
+
+public class GT_HashSet<E extends GT_ItemStack> extends AbstractSet<E> {
+	private transient HashMap<GT_ItemStack, Object> map;
+    private static final Object OBJECT = new Object();
+    
+    public GT_HashSet() {
+        map = new HashMap<GT_ItemStack, Object>();
+        GregTech_API.sItemStackMappings.add(map);
+    }
+    
+    public GT_HashSet(Collection<? extends E> c) {
+        map = new HashMap<GT_ItemStack, Object>(Math.max((int) (c.size()/.75f) + 1, 16));
+        addAll(c);
+        GregTech_API.sItemStackMappings.add(map);
+    }
+    
+    public GT_HashSet(int initialCapacity, float loadFactor) {
+        map = new HashMap<GT_ItemStack, Object>(initialCapacity, loadFactor);
+        GregTech_API.sItemStackMappings.add(map);
+    }
+    
+    public GT_HashSet(int initialCapacity) {
+        map = new HashMap<GT_ItemStack, Object>(initialCapacity);
+        GregTech_API.sItemStackMappings.add(map);
+    }
+    
+    GT_HashSet(int initialCapacity, float loadFactor, boolean dummy) {
+        map = new LinkedHashMap<GT_ItemStack, Object>(initialCapacity, loadFactor);
+        GregTech_API.sItemStackMappings.add(map);
+    }
+    
+    public HashMap getMap(){return map;}
+    
+    @Override
+	public Iterator<E> iterator() {
+        return (Iterator<E>)map.keySet().iterator();
+    }
+    
+    @Override
+	public int size() {
+        return map.size();
+    }
+    
+    @Override
+	public boolean isEmpty() {
+        return map.isEmpty();
+    }
+    
+    @Override
+	public boolean contains(Object o) {
+        return map.containsKey(o);
+    }
+    
+    public boolean add(ItemStack aStack) {
+    	if (GT_Utility.isStackInvalid(aStack)) return false;
+        return map.put(new GT_ItemStack(aStack), OBJECT)==null;
+    }
+    
+    @Override
+	public boolean add(E e) {
+        return map.put(e, OBJECT)==null;
+    }
+    
+    @Override
+	public boolean remove(Object o) {
+        return map.remove(o)==OBJECT;
+    }
+    
+    @Override
+	public void clear() {
+        map.clear();
+    }
+}
+\ No newline at end of file