| /* |
| * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| class ArgIterator { |
| String[] args; |
| int i; |
| ArgIterator(String[] args) { |
| this.args = args; |
| this.i = 0; |
| } |
| String get() { return args[i]; } |
| boolean hasMore() { return args != null && i < args.length; } |
| boolean next() { return ++i < args.length; } |
| } |
| |
| abstract class ArgHandler { |
| public abstract void handle(ArgIterator it); |
| |
| } |
| |
| class ArgRule { |
| String arg; |
| ArgHandler handler; |
| ArgRule(String arg, ArgHandler handler) { |
| this.arg = arg; |
| this.handler = handler; |
| } |
| |
| boolean process(ArgIterator it) { |
| if (match(it.get(), arg)) { |
| handler.handle(it); |
| return true; |
| } |
| return false; |
| } |
| boolean match(String rule_pattern, String arg) { |
| return arg.equals(rule_pattern); |
| } |
| } |
| |
| class ArgsParser { |
| ArgsParser(String[] args, |
| ArgRule[] rules, |
| ArgHandler defaulter) { |
| ArgIterator ai = new ArgIterator(args); |
| while (ai.hasMore()) { |
| boolean processed = false; |
| for (int i=0; i<rules.length; i++) { |
| processed |= rules[i].process(ai); |
| if (processed) { |
| break; |
| } |
| } |
| if (!processed) { |
| if (defaulter != null) { |
| defaulter.handle(ai); |
| } else { |
| System.err.println("ERROR: unparsed \""+ai.get()+"\""); |
| ai.next(); |
| } |
| } |
| } |
| } |
| } |