--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tmatesoft/hg/internal/LifecycleProxy.java	Fri Dec 21 21:20:26 2012 +0100
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2012 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;
+
+import org.tmatesoft.hg.util.Adaptable;
+
+/**
+ * Save callback and delegate to another lifecycle instance, if any
+ * 
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+public class LifecycleProxy implements Lifecycle {
+	
+	private Callback lifecycleCallback;
+	private Lifecycle target;
+	
+	public LifecycleProxy() {
+	}
+
+	public LifecycleProxy(Object delegate) {
+		init(delegate);
+	}
+	
+
+	public void start(int count, Callback callback, Object token) {
+		lifecycleCallback = callback;
+		if (target != null) {
+			target.start(count, callback, token);
+		}
+	}
+
+	public void finish(Object token) {
+		if (target != null) {
+			target.finish(token);
+		}
+		lifecycleCallback = null;
+	}
+
+	public void init(Object delegate) {
+		target = Adaptable.Factory.getAdapter(delegate, Lifecycle.class, null);
+	}
+
+	public void stop() {
+		assert lifecycleCallback != null;
+		if (lifecycleCallback != null) {
+			lifecycleCallback.stop();
+		}
+	}
+}
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