--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tmatesoft/hg/repo/ext/HgExtensionsManager.java	Mon Oct 29 19:04:13 2012 +0100
@@ -0,0 +1,69 @@
+/*
+ * 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.repo.ext;
+
+import org.tmatesoft.hg.internal.Internals;
+import org.tmatesoft.hg.repo.HgRepoConfig;
+
+/**
+ * 
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+public abstract class HgExtensionsManager {
+	
+	public enum HgExt { 
+		MQ ("mq"), Rebase("rebase");
+		
+		private final String mercurialExtName;
+
+		private HgExt(String nativeName) {
+			mercurialExtName = nativeName;
+		}
+		
+		String getNativeName() {
+			return mercurialExtName;
+		}
+	}
+	
+	private final Internals repo;
+	private MqManager mqExt;
+	private Rebase rebaseExt;
+
+	protected HgExtensionsManager(Internals internalRepo) {
+		repo = internalRepo;
+	}
+
+	public boolean isEnabled(HgExt e) {
+		HgRepoConfig cfg = repo.getRepo().getConfiguration();
+		return cfg.getExtensions().isEnabled(e.getNativeName());
+	}
+
+	public Rebase getRebaseExtension() {
+		if (rebaseExt == null && isEnabled(HgExt.Rebase)) {
+			rebaseExt = new Rebase(repo);
+		}
+		return rebaseExt;
+	}
+	
+	public MqManager getMQ() {
+		if (mqExt == null && isEnabled(HgExt.MQ)) {
+			mqExt = new MqManager(repo);
+		}
+		return mqExt;
+	}
+}