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Java > Open Source Codes > proguard > io > DirectoryPump


1 /*
2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
3  * of Java bytecode.
4  *
5  * Copyright (c) 2002-2007 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  */
21 package proguard.io;
22
23 import java.io.*;
24
25
26 /**
27  * This class can read a given file or directory, recursively, applying a given
28  * DataEntryReader to all files it comes across.
29  *
30  * @author Eric Lafortune
31  */
32 public class DirectoryPump implements DataEntryPump
33 {
34     private File directory;
35
36
37     public DirectoryPump(File directory)
38     {
39         this.directory = directory;
40     }
41
42
43     // Implementations for DataEntryPump.
44
45     public void pumpDataEntries(DataEntryReader dataEntryReader)
46     throws IOException
47     {
48         if (!directory.exists())
49         {
50             throw new IOException("No such file or directory");
51         }
52
53         readFiles(directory, dataEntryReader);
54     }
55
56
57     /**
58      * Reads the given subdirectory recursively, applying the given DataEntryReader
59      * to all files that are encountered.
60      */
61     private void readFiles(File file, DataEntryReader dataEntryReader)
62     throws IOException
63     {
64         if (file.isDirectory())
65         {
66             // Recurse into the subdirectory.
67 File[] files = file.listFiles();
68
69             for (int index = 0; index < files.length; index++)
70             {
71                 readFiles(files[index], dataEntryReader);
72             }
73         }
74         else
75         {
76             dataEntryReader.read(new FileDataEntry(directory, file));
77         }
78     }
79 }
80
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