add java Optimize context

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

src/api/java/OptimizeDecRefQueue.java

@@ -0,0 +1,53 @@
+/**
+Copyright (c) 2012-2015 Microsoft Corporation
+   
+Module Name:
+
+    OptimizeDecRefQueue.java
+
+Abstract:
+
+Author:
+
+    @author Christoph Wintersteiger (cwinter) 2012-03-15
+
+Notes:
+    
+**/ 
+
+package com.microsoft.z3;
+
+class OptimizeDecRefQueue extends IDecRefQueue
+{
+    public OptimizeDecRefQueue() 
+    {
+        super();
+    }
+
+    public OptimizeDecRefQueue(int move_limit) 
+    {
+        super(move_limit);
+    }
+
+    protected void incRef(Context ctx, long obj)
+    {
+        try
+        {
+            Native.fixedpointIncRef(ctx.nCtx(), obj);
+        } catch (Z3Exception e)
+        {
+            // OK.
+        }
+    }
+
+    protected void decRef(Context ctx, long obj)
+    {
+        try
+        {
+            Native.fixedpointDecRef(ctx.nCtx(), obj);
+        } catch (Z3Exception e)
+        {
+            // OK.
+        }
+    }
+};