Version 5.8

vmmjava/vmm/internal/JnaObjectMap.java

@@ -0,0 +1,35 @@
+package vmm.internal;
+
+import java.lang.ref.WeakReference;
+import java.util.*;
+
+public class JnaObjectMap {
+    private int counter = 1;
+    private static JnaObjectMap instance;
+    private final Map<Integer, WeakReference<Object>> map = new HashMap<>();
+
+    public static synchronized JnaObjectMap getInstance() {
+        if (instance == null) {
+            instance = new JnaObjectMap();
+        }
+        return instance;
+    }
+
+    public synchronized Integer put(Object obj) {
+    	Integer key = Integer.valueOf(counter++);
+        map.put(key, new WeakReference<>(obj));
+        return key;
+    }
+
+    public synchronized Object get(Integer key) {
+        WeakReference<Object> ref = map.get(key);
+        if (ref != null) {
+            return ref.get();
+        }
+        return null;
+    }
+
+    public synchronized void remove(Integer key) {
+        map.remove(key);
+    }
+}