ArgumentWordReader.java revision 9f606f95f03a75961498803e24bee6799a7c0885 
1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21package proguard;
22
23import java.io.*;
24
25
26/**
27 * A <code>WordReader</code> that returns words from an argument list.
28 * Single arguments are split into individual words if necessary.
29 *
30 * @author Eric Lafortune
31 */
32public class ArgumentWordReader extends WordReader
33{
34    private final String[] arguments;
35    private int      index = 0;
36
37
38//    /**
39//     * Creates a new ArgumentWordReader for the given arguments.
40//     */
41//    public ArgumentWordReader(String[] arguments)
42//    {
43//        this(arguments, null);
44//    }
45//
46//
47    /**
48     * Creates a new ArgumentWordReader for the given arguments, with the
49     * given base directory.
50     */
51    public ArgumentWordReader(String[] arguments, File baseDir)
52    {
53        super(baseDir);
54
55        this.arguments = arguments;
56    }
57
58
59    // Implementations for WordReader.
60
61    protected String nextLine() throws IOException
62    {
63        return index < arguments.length ?
64            arguments[index++] :
65            null;
66    }
67
68
69    protected String lineLocationDescription()
70    {
71        return "argument number " + index;
72    }
73
74
75    /**
76     * Test application that prints out the individual words of
77     * the argument list.
78     */
79    public static void main(String[] args) {
80
81        try
82        {
83            WordReader reader = new ArgumentWordReader(args, null);
84
85            try
86            {
87                while (true)
88                {
89                    String word = reader.nextWord();
90                    if (word == null)
91                        System.exit(-1);
92
93                    System.err.println("["+word+"]");
94                }
95            }
96            catch (Exception ex)
97            {
98                ex.printStackTrace();
99            }
100            finally
101            {
102                reader.close();
103            }
104        }
105        catch (IOException ex)
106        {
107            ex.printStackTrace();
108        }
109    }
110}
111