Added a mechanism for pluggable event access control.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1135 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/dobj/AccessController.java

@@ -0,0 +1,25 @@
+//
+// $Id: AccessController.java,v 1.1 2002/03/20 03:19:51 mdb Exp $
+
+package com.threerings.presents.dobj;
+
+/**
+ * Used to validate distributed object subscription requests and event
+ * dispatches.
+ *
+ * @see DObject#setAccessController
+ */
+public interface AccessController
+{
+    /**
+     * Should return true if the supplied subscriber is allowed to
+     * subscribe to the specified object.
+     */
+    public boolean allowSubscribe (DObject object, Subscriber subscriber);
+
+    /**
+     * Should return true if the supplied event is legal for dispatch on
+     * the specified distributed object.
+     */
+    public boolean allowDispatch (DObject object, DEvent event);
+}