1 files changed, 53 insertions, 0 deletions
diff --git a/src/main/java/gtPlusPlus/api/objects/data/ConcurrentSet.java b/src/main/java/gtPlusPlus/api/objects/data/ConcurrentSet.java
new file mode 100644
index 0000000000..1d3ffc1c01
--- /dev/null
+++ b/src/main/java/gtPlusPlus/api/objects/data/ConcurrentSet.java
@@ -0,0 +1,53 @@
+package gtPlusPlus.api.objects.data;
+
+import java.io.Serializable;
+import java.util.AbstractSet;
+import java.util.Iterator;
+import java.util.concurrent.ConcurrentMap;
+
+public abstract class ConcurrentSet<E> extends AbstractSet<E> implements Serializable {
+
+    private static final long serialVersionUID = -6761513279741915432L;
+
+    private final ConcurrentMap<Integer, E> mInternalMap;
+    
+	private int mInternalID = 0;	
+
+    /**
+     * Creates a new instance which wraps the specified {@code map}.
+     */    
+    public ConcurrentSet(ConcurrentMap<Integer, E> aMap) {
+    	mInternalMap = aMap;
+    }
+
+    @Override
+    public int size() {
+        return mInternalMap.size();
+    }
+
+    @Override
+    public boolean contains(Object o) {
+        return mInternalMap.containsKey(o);
+    }
+
+    @Override
+    public boolean add(E o) {
+        return mInternalMap.putIfAbsent(mInternalID++, o) == null;
+    }
+
+    @Override
+    public boolean remove(Object o) {
+        return mInternalMap.remove(o) != null;
+    }
+
+    @Override
+    public void clear() {
+		this.mInternalID = 0;
+        mInternalMap.clear();
+    }
+
+    @Override
+    public Iterator<E> iterator() {
+        return mInternalMap.values().iterator();
+    }
+}