1 /* 2 * Copyright (c) 2005, 2016, 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 package build.tools.projectcreator; 26 27 class ArgIterator { 28 String[] args; 29 int i; 30 ArgIterator(String[] args) { 31 this.args = args; 32 this.i = 0; 33 } 34 String get() { return args[i]; } 35 boolean hasMore() { return args != null && i < args.length; } 36 boolean next() { return ++i < args.length; } 37 } 38 39 abstract class ArgHandler { 40 public abstract void handle(ArgIterator it); 41 42 } 43 44 class ArgRule { 45 String arg; 46 ArgHandler handler; 47 ArgRule(String arg, ArgHandler handler) { 48 this.arg = arg; 49 this.handler = handler; 50 } 51 52 boolean process(ArgIterator it) { 53 if (match(it.get(), arg)) { 54 handler.handle(it); 55 return true; 56 } 57 return false; 58 } 59 boolean match(String rule_pattern, String arg) { 60 return arg.equals(rule_pattern); 61 } 62 } 63 64 class ArgsParser { 65 ArgsParser(String[] args, 66 ArgRule[] rules, 67 ArgHandler defaulter) { 68 ArgIterator ai = new ArgIterator(args); 69 while (ai.hasMore()) { 70 boolean processed = false; 71 for (int i=0; i<rules.length; i++) { 72 processed |= rules[i].process(ai); 73 if (processed) { 74 break; 75 } 76 } 77 if (!processed) { 78 if (defaulter != null) { 79 defaulter.handle(ai); 80 } else { 81 System.err.println("ERROR: unparsed \""+ai.get()+"\""); 82 ai.next(); 83 } 84 } 85 } 86 } 87 }