--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hg4j-cli/src/main/java/org/tmatesoft/hg/console/Options.java	Tue May 10 10:52:53 2011 +0200
@@ -0,0 +1,111 @@
+/*
+ * 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.console;
+
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+import org.tmatesoft.hg.repo.HgLookup;
+import org.tmatesoft.hg.repo.HgRepository;
+
+/**
+ * Parse command-line options. Primitive implementation that recognizes options with 0 or 1 argument.
+ * 
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+class Options {
+
+	public final Map<String,List<String>> opt2values = new HashMap<String, List<String>>();
+
+	public boolean getBoolean(String... aliases) {
+		return getBoolean(false, aliases);
+	}
+
+	public boolean getBoolean(boolean def, String... aliases) {
+		for (String s : aliases) {
+			if (opt2values.containsKey(s)) {
+				return true;
+			}
+		}
+		return def;
+	}
+
+	public String getSingle(String... aliases) {
+		String rv = null;
+		for (String s : aliases) {
+			List<String> values = opt2values.get(s);
+			if (values != null && values.size() > 0) {
+				rv = values.get(values.size() - 1); // take last one, most recent
+			}
+		}
+		return rv;
+	}
+	
+	public int getSingleInt(int def, String... aliases) {
+		String r = getSingle(aliases);
+		if (r == null) {
+			return def;
+		}
+		return Integer.parseInt(r);
+	}
+
+	public List<String> getList(String... aliases) {
+		LinkedList<String> rv = new LinkedList<String>();
+		for (String s : aliases) {
+			List<String> values = opt2values.get(s);
+			if (values != null) {
+				rv.addAll(values);
+			}
+		}
+		return rv;
+	}
+	
+	public HgRepository findRepository() throws Exception {
+		String repoLocation = getSingle("-R", "--repository");
+		if (repoLocation != null) {
+			return new HgLookup().detect(repoLocation);
+		}
+		return new HgLookup().detectFromWorkingDir();
+	}
+
+
+	public static Options parse(String[] commandLineArgs) {
+		Options rv = new Options();
+		List<String> values = new LinkedList<String>();
+		rv.opt2values.put("", values); // values with no options
+		for (String arg : commandLineArgs) {
+			if (arg.charAt(0) == '-') {
+				// option
+				if (arg.length() == 1) {
+					throw new IllegalArgumentException("Bad option: -");
+				}
+				values = rv.opt2values.get(arg);
+				if (values == null) {
+					rv.opt2values.put(arg, values = new LinkedList<String>());
+				}
+				// next value, if any, gets into the values list for arg option.
+			} else {
+				values.add(arg);
+				values = rv.opt2values.get("");
+			}
+		}
+		return rv;
+	}
+}
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