1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2014 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    private       InputStream    bufferedInputStream;
39
40
41    public ZipDataEntry(DataEntry      parent,
42                        ZipEntry       zipEntry,
43                        ZipInputStream zipInputStream)
44    {
45        this.parent         = parent;
46        this.zipEntry       = zipEntry;
47        this.zipInputStream = zipInputStream;
48    }
49
50
51    // Implementations for DataEntry.
52
53    public String getName()
54    {
55        // Get the right separators.
56        String name = zipEntry.getName()
57            .replace(File.separatorChar, ClassConstants.PACKAGE_SEPARATOR);
58
59        // Chop the trailing directory slash, if any.
60        int length = name.length();
61        return length > 0 &&
62               name.charAt(length-1) == ClassConstants.PACKAGE_SEPARATOR ?
63                   name.substring(0, length -1) :
64                   name;
65    }
66
67
68    public boolean isDirectory()
69    {
70        return zipEntry.isDirectory();
71    }
72
73
74    public InputStream getInputStream() throws IOException
75    {
76        if (bufferedInputStream == null)
77        {
78            bufferedInputStream = new BufferedInputStream(zipInputStream);
79        }
80
81        return bufferedInputStream;
82    }
83
84
85    public void closeInputStream() throws IOException
86    {
87        zipInputStream.closeEntry();
88        zipInputStream      = null;
89        bufferedInputStream = null;
90    }
91
92
93    public DataEntry getParent()
94    {
95        return parent;
96    }
97
98
99    // Implementations for Object.
100
101    public String toString()
102    {
103        return parent.toString() + ':' + getName();
104    }
105}
106