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 }