--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tmatesoft/hg/repo/HgBookmarks.java	Wed Aug 08 14:41:44 2012 +0200
@@ -0,0 +1,115 @@
+/*
+ * 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;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import org.tmatesoft.hg.core.Nodeid;
+import org.tmatesoft.hg.internal.LineReader;
+import org.tmatesoft.hg.util.LogFacility;
+
+/**
+ * 
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+public final class HgBookmarks {
+	private final HgRepository repo;
+	private Map<String, Nodeid> bookmarks = Collections.emptyMap();
+	private String activeBookmark; 
+
+	HgBookmarks(HgRepository hgRepo) {
+		repo = hgRepo;
+	}
+	
+	/*package-local*/ void read() throws HgInvalidControlFileException {
+		final LogFacility log = repo.getContext().getLog();
+		File all = new File (repo.getRepositoryRoot(), HgRepositoryFiles.Bookmarks.getName());
+		LinkedHashMap<String, Nodeid> bm = new LinkedHashMap<String, Nodeid>();
+		if (all.canRead()) {
+			LineReader lr1 = new LineReader(all, log);
+			ArrayList<String> c = new ArrayList<String>();
+			lr1.read(new LineReader.SimpleLineCollector(), c);
+			for (String s : c) {
+				int x = s.indexOf(' ');
+				try {
+					if (x > 0) {
+						Nodeid nid = Nodeid.fromAscii(s.substring(0, x));
+						String name = new String(s.substring(x+1));
+						if (repo.getChangelog().isKnown(nid)) {
+							// copy name part not to drag complete line
+							bm.put(name, nid);
+						} else {
+							log.dump(getClass(), LogFacility.Severity.Info, "Bookmark %s points to non-existent revision %s, ignored.", name, nid);
+						}
+					} else {
+						log.dump(getClass(), LogFacility.Severity.Warn, "Can't parse bookmark entry: %s", s);
+					}
+				} catch (IllegalArgumentException ex) {
+					log.dump(getClass(), LogFacility.Severity.Warn, ex, String.format("Can't parse bookmark entry: %s", s));
+				}
+			}
+			bookmarks = bm;
+		} else {
+			bookmarks = Collections.emptyMap();
+		}
+		
+		activeBookmark = null;
+		File active = new File(repo.getRepositoryRoot(), HgRepositoryFiles.BookmarksCurrent.getName());
+		if (active.canRead()) {
+			LineReader lr2 = new LineReader(active, repo.getContext().getLog());
+			ArrayList<String> c = new ArrayList<String>(2);
+			lr2.read(new LineReader.SimpleLineCollector(), c);
+			if (c.size() > 0) {
+				activeBookmark = c.get(0);
+			}
+		}
+	}
+
+	/**
+	 * Tell name of the active bookmark 
+	 * @return <code>null</code> if none active
+	 */
+	public String getActiveBookmarkName() {
+		return activeBookmark;
+	}
+
+	/**
+	 * Retrieve revision associated with the named bookmark.
+	 * 
+	 * @param bookmarkName name of the bookmark
+	 * @return revision or <code>null</code> if bookmark is not known
+	 */
+	public Nodeid getRevision(String bookmarkName) {
+		return bookmarks.get(bookmarkName);
+	}
+
+	/**
+	 * Retrieve all bookmarks known in the repository
+	 * @return collection with names, never <code>null</code>
+	 */
+	public Collection<String> getAllBookmarks() {
+		// bookmarks are initialized with atomic assignment,
+		// hence can use view (not a synchronized copy) here
+		return Collections.unmodifiableSet(bookmarks.keySet());
+	}
+}