--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hg4j/src/main/java/org/tmatesoft/hg/core/HgRepoFacade.java	Tue May 10 10:52:53 2011 +0200
@@ -0,0 +1,113 @@
+/*
+ * 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 java.io.File;
+
+import org.tmatesoft.hg.repo.HgRepository;
+import org.tmatesoft.hg.repo.HgLookup;
+
+/**
+ * Starting point for the library.
+ * <p>Sample use:
+ * <pre>
+ *  HgRepoFacade f = new HgRepoFacade();
+ *  f.initFrom(System.getenv("whatever.repo.location"));
+ *  HgStatusCommand statusCmd = f.createStatusCommand();
+ *  HgStatusCommand.Handler handler = ...;
+ *  statusCmd.execute(handler);
+ * </pre>
+ * 
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+public class HgRepoFacade {
+	private HgRepository repo;
+
+	public HgRepoFacade() {
+	}
+	
+	/**
+	 * @param hgRepo
+	 * @return true on successful initialization
+	 * @throws IllegalArgumentException when argument is null 
+	 */
+	public boolean init(HgRepository hgRepo) {
+		if (hgRepo == null) {
+			throw new IllegalArgumentException();
+		}
+		repo = hgRepo;
+		return !repo.isInvalid();
+	}
+
+	/**
+	 * Tries to find repository starting from the current working directory.
+	 * @return <code>true</code> if found valid repository
+	 * @throws HgException in case of errors during repository initialization
+	 */
+	public boolean init() throws HgException {
+		repo = new HgLookup().detectFromWorkingDir();
+		return repo != null && !repo.isInvalid();
+	}
+	
+	/**
+	 * Looks up Mercurial repository starting from specified location and up to filesystem root.
+	 * 
+	 * @param repoLocation path to any folder within structure of a Mercurial repository.
+	 * @return <code>true</code> if found valid repository 
+	 * @throws HgException if there are errors accessing specified location
+	 * @throws IllegalArgumentException if argument is <code>null</code>
+	 */
+	public boolean initFrom(File repoLocation) throws HgException {
+		if (repoLocation == null) {
+			throw new IllegalArgumentException();
+		}
+		repo = new HgLookup().detect(repoLocation);
+		return repo != null && !repo.isInvalid();
+	}
+	
+	public HgRepository getRepository() {
+		if (repo == null) {
+			throw new IllegalStateException("Call any of #init*() methods first first");
+		}
+		return repo;
+	}
+
+	public HgLogCommand createLogCommand() {
+		return new HgLogCommand(repo/*, getCommandContext()*/);
+	}
+
+	public HgStatusCommand createStatusCommand() {
+		return new HgStatusCommand(repo/*, getCommandContext()*/);
+	}
+
+	public HgCatCommand createCatCommand() {
+		return new HgCatCommand(repo);
+	}
+
+	public HgManifestCommand createManifestCommand() {
+		return new HgManifestCommand(repo);
+	}
+
+	public HgOutgoingCommand createOutgoingCommand() {
+		return new HgOutgoingCommand(repo);
+	}
+
+	public HgIncomingCommand createIncomingCommand() {
+		return new HgIncomingCommand(repo);
+	}
+}