ZipDataEntry.java revision 8a6199f0c36a778f22394364347a301b0b28e94b 
1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2013 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.io;
22
23import proguard.classfile.ClassConstants;
24
25import java.io.*;
26import java.util.zip.*;
27
28/**
29 * This <code>DataEntry</code> represents a ZIP entry.
30 *
31 * @author Eric Lafortune
32 */
33public class ZipDataEntry implements DataEntry
34{
35    private final DataEntry      parent;
36    private final ZipEntry       zipEntry;
37    private       ZipInputStream zipInputStream;
38
39
40    public ZipDataEntry(DataEntry      parent,
41                        ZipEntry       zipEntry,
42                        ZipInputStream zipInputStream)
43    {
44        this.parent         = parent;
45        this.zipEntry       = zipEntry;
46        this.zipInputStream = zipInputStream;
47    }
48
49
50    // Implementations for DataEntry.
51
52    public String getName()
53    {
54        // Get the right separators.
55        String name = zipEntry.getName()
56            .replace(File.separatorChar, ClassConstants.INTERNAL_PACKAGE_SEPARATOR);
57
58        // Chop the trailing directory slash, if any.
59        int length = name.length();
60        return length > 0 &&
61               name.charAt(length-1) == ClassConstants.INTERNAL_PACKAGE_SEPARATOR ?
62                   name.substring(0, length -1) :
63                   name;
64    }
65
66
67    public boolean isDirectory()
68    {
69        return zipEntry.isDirectory();
70    }
71
72
73    public InputStream getInputStream() throws IOException
74    {
75        return zipInputStream;
76    }
77
78
79    public void closeInputStream() throws IOException
80    {
81        zipInputStream.closeEntry();
82        zipInputStream = null;
83    }
84
85
86    public DataEntry getParent()
87    {
88        return parent;
89    }
90
91
92    // Implementations for Object.
93
94    public String toString()
95    {
96        return parent.toString() + ':' + getName();
97    }
98}
99