blob: d206899273a8154ae948dbc5c36155479415f306 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/*******************************************************************************
* Copyright (c) 2005, 2018 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Rob Harrop - SpringSource Inc. (bug 253942)
*******************************************************************************/
package org.eclipse.osgi.storage.bundlefile;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.eclipse.osgi.internal.debug.Debug;
import org.eclipse.osgi.internal.messages.Msg;
import org.eclipse.osgi.storage.BundleInfo;
import org.eclipse.osgi.util.NLS;
/**
* A BundleFile that uses a ZipFile as it base file.
*/
public class ZipBundleFile extends CloseableBundleFile<ZipEntry> {
/**
* The zip file
*/
volatile ZipFile zipFile;
public ZipBundleFile(File basefile, BundleInfo.Generation generation, MRUBundleFileList mruList, Debug debug) throws IOException {
super(basefile, generation, mruList, debug);
if (!BundleFile.secureAction.exists(basefile))
throw new IOException(NLS.bind(Msg.ADAPTER_FILEEXIST_EXCEPTION, basefile));
}
@Override
protected void doOpen() throws IOException {
zipFile = BundleFile.secureAction.getZipFile(this.basefile);
}
/**
* Returns a ZipEntry for the bundle file. Must be called while holding the open lock.
* This method does not ensure that the ZipFile is opened. Callers may need to call getZipfile() prior to calling this
* method.
* @param path the path to an entry
* @return a ZipEntry or null if the entry does not exist
*/
private ZipEntry getZipEntry(String path) {
if (path.length() > 0 && path.charAt(0) == '/')
path = path.substring(1);
ZipEntry entry = zipFile.getEntry(path);
if (entry != null && entry.getSize() == 0 && !entry.isDirectory()) {
// work around the directory bug see bug 83542
ZipEntry dirEntry = zipFile.getEntry(path + '/');
if (dirEntry != null)
entry = dirEntry;
}
return entry;
}
@Override
protected BundleEntry findEntry(String path) {
ZipEntry zipEntry = getZipEntry(path);
if (zipEntry == null) {
if (path.length() == 0 || path.charAt(path.length() - 1) == '/') {
// this is a directory request lets see if any entries exist in this directory
if (containsDir(path))
return new DirZipBundleEntry(this, path);
}
return null;
}
return new ZipBundleEntry(zipEntry, this);
}
@Override
protected void doClose() throws IOException {
zipFile.close();
}
@Override
protected void postClose() {
zipFile = null;
}
@Override
protected InputStream doGetInputStream(ZipEntry entry) throws IOException {
return zipFile.getInputStream(entry);
}
@Override
protected Iterable<String> getPaths() {
return new Iterable<String>() {
@Override
public Iterator<String> iterator() {
final Enumeration<? extends ZipEntry> entries = zipFile.entries();
return new Iterator<String>() {
@Override
public boolean hasNext() {
return entries.hasMoreElements();
}
@Override
public String next() {
ZipEntry entry = entries.nextElement();
return entry.getName();
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
};
}
};
}
}
|
