--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tmatesoft/hg/core/HgAbstractCommand.java	Tue May 17 00:56:54 2011 +0200
@@ -0,0 +1,60 @@
+/*
+ * 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.core;
+
+import org.tmatesoft.hg.util.CancelSupport;
+import org.tmatesoft.hg.util.ProgressSupport;
+
+/**
+ * intentionally package-local, might be removed or refactored in future
+ * 
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+class HgAbstractCommand<T extends HgAbstractCommand<?>> implements ProgressSupport.Target<T>, CancelSupport.Target<T> {
+	private ProgressSupport progressHelper;
+	private CancelSupport cancelHelper;
+
+	@SuppressWarnings("unchecked")
+	public T set(ProgressSupport ps) {
+		progressHelper = ps;
+		return (T) this;
+	}
+	
+	@SuppressWarnings("unchecked")
+	public T set(CancelSupport cs) {
+		cancelHelper = cs;
+		return (T) this;
+	}
+
+	// shall not return null
+	protected ProgressSupport getProgressSupport(Object context) {
+		if (progressHelper != null) {
+			return progressHelper;
+		}
+		return ProgressSupport.Factory.get(context);
+	}
+
+	// shall not return null
+	protected CancelSupport getCancelSupport(Object context) {
+		if (cancelHelper != null) {
+			return cancelHelper;
+		}
+		return CancelSupport.Factory.get(context);
+	}
+
+}