Added getCacheAdapter().

src/java/com/samskivert/jdbc/depot/PersistenceContext.java

@@ -140,6 +140,14 @@ public class PersistenceContext
         _cache = adapter;
     }
 
+    /**
+     * Returns the cache adapter used by this context or null if caching is disabled.
+     */
+    public CacheAdapter getCacheAdapter ()
+    {
+        return _cache;
+    }
+
     /**
      * Shuts this persistence context down, shutting down any caching system in use and shutting
      * down the JDBC connection pool.