--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tmatesoft/hg/repo/HgRepoConfig.java	Sat Nov 05 04:21:18 2011 +0100
@@ -0,0 +1,205 @@
+/*
+ * 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.repo;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+import org.tmatesoft.hg.internal.ConfigFile;
+import org.tmatesoft.hg.internal.Experimental;
+import org.tmatesoft.hg.util.Pair;
+
+/**
+ * WORK IN PROGRESS
+ * 
+ * Repository-specific configuration. 
+ * 
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+@Experimental(reason="WORK IN PROGRESS")
+public final class HgRepoConfig /*implements RepoChangeListener, perhaps, also RepoChangeNotifier? */{
+	/*ease access for inner classes*/ final ConfigFile config;
+
+	/*package-local*/HgRepoConfig(ConfigFile configFile) {
+		config = configFile;
+	}
+
+	public Section getSection(String name) {
+		if (name == null) {
+			throw new IllegalArgumentException();
+		}
+		if ("paths".equals(name)) {
+			return new PathsSection();
+		}
+		if ("extensions".equals(name)) {
+			return new ExtensionsSection();
+		}
+		return new Section(name);
+	}
+	
+	public boolean hasSection(String name) {
+		return config.hasSection(name);
+	}
+	
+	public boolean getBooleanValue(String section, String key, boolean defaultValue) {
+		return config.getBoolean(section, key, defaultValue);
+	}
+	
+	public String getStringValue(String section, String key, String defaultValue) {
+		return config.getString(section, key, defaultValue);
+	}
+
+	//
+	//
+	
+	public PathsSection getPaths() {
+		Section s = getSection("paths");
+		if (s.exists()) {
+			return (PathsSection) s;
+		}
+		return new PathsSection();
+	}
+	
+	public ExtensionsSection getExtensions() {
+		Section s = getSection("extensions");
+		if (s.exists()) {
+			return (ExtensionsSection) s;
+		}
+		return new ExtensionsSection();
+	}
+
+	/*
+	 * IMPLEMENTATION NOTE: Section is merely a view to configuration file, without any state. 
+	 * In case I need to sync access to config (i.e. write) or refresh it later - can be easily done  
+	 */
+
+	public class Section implements Iterable<Pair<String,String>> {
+
+		protected final String section;
+
+		/*package-local*/Section(String sectionName) {
+			section = sectionName;
+		}
+		
+		public String getName() {
+			return section;
+		}
+					
+		/**
+		 * Whether this is real section or a bare non-null instance 
+		 */
+		public boolean exists() {
+			return hasSection(section);
+		}
+
+		/**
+		 * @return defined keys, in the order they appear in the section
+		 */
+		public List<String> getKeys() {
+			return new ArrayList<String>(config.getSection(section).keySet());
+		}
+		
+		/**
+		 * Find out whether key is present and got any value 
+		 * @param key identifies an entry to look up
+		 * @return true if key is present in the section and has non-empty value
+		 */
+		public boolean isKeySet(String key) {
+			String value = getStringValue(section, key, null);
+			return value != null && value.length() > 0;
+		}
+
+		/**
+		 * Value of a key as boolean
+		 * @param key identifies an entry to look up
+		 * @param defaultValue optional value to return if no entry for the key found in this section
+		 * @return value corresponding to the key, or defaultValue if key not found
+		 */
+		public boolean getBoolean(String key, boolean defaultValue) {
+			return getBooleanValue(section, key, defaultValue);
+		}
+		
+		/**
+		 * Value of a key as regular string
+		 * @param key identifies entry to look up
+		 * @param defaultValue optional value to return if no entry for the key found in this section
+		 * @return value corresponding to the key, or defaultValue if key not found
+		 */
+		public String getString(String key, String defaultValue) {
+			return getStringValue(section, key, defaultValue);
+		}
+
+		public Iterator<Pair<String, String>> iterator() {
+			final Map<String, String> m = config.getSection(section);
+			if (m.isEmpty()) {
+				return Collections.<Pair<String,String>>emptyList().iterator();
+			}
+			ArrayList<Pair<String, String>> rv = new ArrayList<Pair<String,String>>(m.size());
+			for (Map.Entry<String, String> e : m.entrySet()) {
+				rv.add(new Pair<String,String>(e.getKey(), e.getValue()));
+			}
+			return rv.iterator();
+		}
+	}
+	
+	/*
+	 * Few well-known sections may get their specific subclasses
+	 */
+
+	/**
+	 * Section [paths]
+	 */
+	public class PathsSection extends Section {
+		PathsSection() {
+			super("paths");
+		}
+
+		public boolean hasDefault() {
+			return isKeySet("default");
+		}
+		public String getDefault() {
+			return super.getString("default", null);
+		}
+		public boolean hasDefaultPush() {
+			return isKeySet("default-push");
+		}
+		public String getDefaultPush() {
+			return super.getString("default-push", null);
+		}
+	}
+
+	/**
+	 * Section [extensions]
+	 *
+	 * @author Artem Tikhomirov
+	 * @author TMate Software Ltd.
+	 */
+	public class ExtensionsSection extends Section {
+		ExtensionsSection() {
+			super("extensions");
+		}
+
+		public boolean isEnabled(String extensionName) {
+			String value = config.getSection(section).get(extensionName);
+			return value != null && value.length() > 0 && '!' != value.charAt(0) ;
+		}
+	}
+}