--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tmatesoft/hg/internal/IterateControlMediator.java	Tue Sep 27 05:29:12 2011 +0200
@@ -0,0 +1,55 @@
+/*
+ * 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;
+
+import org.tmatesoft.hg.internal.Lifecycle.Callback;
+import org.tmatesoft.hg.util.CancelSupport;
+import org.tmatesoft.hg.util.CancelledException;
+
+/**
+ *
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+public class IterateControlMediator {
+
+	private final CancelSupport src;
+	private Callback receiver;
+
+	public IterateControlMediator(CancelSupport source, Lifecycle.Callback target) {
+		assert target != null;
+		src = source;
+		receiver = target;
+	}
+
+	public boolean checkCancelled() {
+		if (src == null) {
+			return false;
+		}
+		try {
+			src.checkCancelled();
+			return false;
+		} catch (CancelledException ex) {
+			receiver.stop();
+			return true;
+		}
+	}
+	
+	public void stop() {
+		receiver.stop();
+	}
+}