1 /* 2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 class ArgIterator { 26 String[] args; 27 int i; 28 ArgIterator(String[] args) { 29 this.args = args; 30 this.i = 0; 31 } 32 String get() { return args[i]; } 33 boolean hasMore() { return args != null && i < args.length; } 34 boolean next() { return ++i < args.length; } 35 } 36 37 abstract class ArgHandler { 38 public abstract void handle(ArgIterator it); 39 40 } 41 42 class ArgRule { 43 String arg; 44 ArgHandler handler; 45 ArgRule(String arg, ArgHandler handler) { 46 this.arg = arg; 47 this.handler = handler; 48 } 49 50 boolean process(ArgIterator it) { 51 if (match(it.get(), arg)) { 52 handler.handle(it); 53 return true; 54 } 55 return false; 56 } 57 boolean match(String rule_pattern, String arg) { 58 return arg.equals(rule_pattern); 59 } 60 } 61 62 class ArgsParser { 63 ArgsParser(String[] args, 64 ArgRule[] rules, 65 ArgHandler defaulter) { 66 ArgIterator ai = new ArgIterator(args); 67 while (ai.hasMore()) { 68 boolean processed = false; 69 for (int i=0; i<rules.length; i++) { 70 processed |= rules[i].process(ai); 71 if (processed) { 72 break; 73 } 74 } 75 if (!processed) { 76 if (defaulter != null) { 77 defaulter.handle(ai); 78 } else { 79 System.err.println("ERROR: unparsed \""+ai.get()+"\""); 80 ai.next(); 81 } 82 } 83 } 84 } 85 }