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Java > Open Source Codes > proguard > io > FileDataEntry


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 proguard.classfile.ClassConstants;
24
25 import java.io.*;
26
27 /**
28  * This <code>DataEntry</code> represents a file.
29  *
30  * @author Eric Lafortune
31  */
32 public class FileDataEntry implements DataEntry
33 {
34     private File directory;
35     private File file;
36     private InputStream inputStream;
37
38
39     public FileDataEntry(File directory,
40                          File file)
41     {
42         this.directory = directory;
43         this.file = file;
44     }
45
46
47     // Implementations for DataEntry.
48
49     public String JavaDoc getName()
50     {
51         // Chop the directory name from the file name and get the right separators.
52 return file.equals(directory) ?
53             file.getName() :
54             file.getPath()
55             .substring(directory.getPath().length() + File.separator.length())
56             .replace(File.separatorChar, ClassConstants.INTERNAL_PACKAGE_SEPARATOR);
57     }
58
59
60     // Implementations for InputEntry.
61
62     public InputStream getInputStream() throws IOException
63     {
64         if (inputStream == null)
65         {
66             inputStream = new BufferedInputStream(new FileInputStream(file));
67         }
68
69         return inputStream;
70     }
71
72
73     public void closeInputStream() throws IOException
74     {
75         inputStream.close();
76         inputStream = null;
77     }
78
79
80     public DataEntry getParent()
81     {
82         return null;
83     }
84
85
86     // Implementations for Object.
87
88     public String JavaDoc toString()
89     {
90         return getName();
91     }
92 }
93
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