--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tmatesoft/hg/internal/Lifecycle.java	Tue May 17 03:40:52 2011 +0200
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2011 TMate Software Ltd
+ *  
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * For information on how to redistribute this software under
+ * the terms of a license other than GNU General Public License
+ * contact TMate Software at support@hg4j.com
+ */
+package org.tmatesoft.hg.internal;
+
+/**
+ * EXPERIMENTAL.
+ * Mix-in for RevlogStream.Inspector to get informed about start and end of the iteration
+ * 
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+public interface Lifecycle {
+
+	public void start(int count, Callback callback, Object token);
+	public void finish(Object token);
+
+	interface Callback {
+		void stop();
+	}
+	
+	class BasicCallback implements Callback {
+		private boolean done = false;
+		
+		public void stop() {
+			done = true;
+		}
+		public boolean isStopped() {
+			return done;
+		}
+	}
+}