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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
package com.sun.star.lib.unoloader;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.jar.Attributes;
import java.util.jar.Manifest;
import java.util.jar.JarInputStream;
/**
* The root UNO class loader.
*
* <p>This class loader is able to load all published URE classes, including the
* classes representing the published URE UNO types. For consistency, it is
* important that within each Java UNO environment there is one instance of this
* class loader that is the defining class loader of all published URE classes
* (and hence of all unpublished URE classes, too) and of all classes
* representing UNO types (the published URE UNO types, any unpublished URE UNO
* types, and any additional UNO types introduced by components; for the latter,
* {@link #addURL} may be necessary).</p>
*
* <p><em>This is an internal, unstable class of the Uno Runtime Environment; it
* should not be used by client code.</em></p>
*
* @since UDK 3.2.0
*/
public final class UnoClassLoader extends URLClassLoader {
/**
* Instantiates the root UNO class loader.
*
* @param base a base URL relative to which the URE JARs
* (<code>java_uno.jar</code>, <code>juh.jar</code>, <code>jurt.jar</code>,
* <code>ridl.jar</code>) can be found; must not be <code>null</code>.
*
* @param classPath an array of URLs that form the class path of this class
* loader; may be <code>null</code>, which is the same as an empty array.
* The URLs are interpreted in the same way as the arguments of a {@link
* URLClassLoader}.
*
* @param parent the parent class loader for delegation.
*
* @throws MalformedURLException if the given <code>base</code> URL is
* malformed.
*/
public UnoClassLoader(URL base, URL[] classPath, ClassLoader parent)
throws MalformedURLException
{
super(createUrls(base, classPath), parent);
}
/**
* Obtains a class loader for a UNO JAR.
*
* @param jar the URL of a UNO JAR; must not be <code>null</code>.
*
* @param mainAttributes represents the main section of the manifest of the
* given JAR <code>jar</code>; <code>null</code> if the given JAR does not
* have a manifest. (This redundant parameter is there for performance
* reasons, as typically the caller of this method already has this
* information available.)
*
* @return an appropriate class loader; will never be <code>null</code>.
*
* @throws MalformedURLException if the given <code>jar</code> URL or any of
* the UNO-Type-Path URLs specified in the given JAR are malformed.
*/
public ClassLoader getClassLoader(URL jar, Attributes mainAttributes)
throws MalformedURLException
{
String path = mainAttributes == null ?
null : mainAttributes.getValue("UNO-Type-Path");
if (path == null) {
path = "<>";
}
for (int i = 0; i < path.length();) {
while (i < path.length() && path.charAt(i) == ' ') {
++i;
}
if (i < path.length()) {
String url;
if (path.charAt(i) == '<') {
int j = path.indexOf('>', i + 1);
if (j < 0) {
url = path.substring(i + 1);
i = path.length();
} else {
url = path.substring(i + 1, j);
i = j + 1;
}
} else {
int j = path.indexOf(' ', i + 1);
if (j < 0) {
j = path.length();
}
url = path.substring(i, j);
i = j;
}
addURL(new URL(jar, url));
}
}
return URLClassLoader.newInstance(new URL[] { jar }, this);
}
/**
* Executes a UNO JAR.
*
* @param jar the URL of a UNO JAR that specifies a Main-Class; must not be
* <code>null</code>.
*
* @param arguments any arguments passed to the <code>main</code> method of
* the specified Main-Class of the given JAR <code>jar</code>; must not be
* <code>null</code>.
*
* @throws IOException if there are any problems processing the given JAR
* <code>jar</code>.
*
* @throws ClassNotFoundException if the given JAR <code>jar</code> does not
* specify a Main-Class, or if the specified Main-Class cannot be found.
*
* @throws NoSuchMethodException if the specified Main-Class of the given
* JAR <code>jar</code> does not have an appropriate <code>main</code>
* method.
*
* @throws InvocationTargetException if an exception occurs while executing
* the <code>main</code> method of the specified Main-Class of the given JAR
* <code>jar</code>.
*/
public void execute(URL jar, String[] arguments)
throws IOException, ClassNotFoundException, NoSuchMethodException,
InvocationTargetException
{
Attributes attr = getJarMainAttributes(jar);
String name = attr == null
? null : attr.getValue(Attributes.Name.MAIN_CLASS);
if (name == null) {
throw new ClassNotFoundException(
jar + " does not specify a main class");
}
try {
getClassLoader(jar, attr).loadClass(name.replace('/', '.')).
getMethod("main", new Class[] { String[].class }).
invoke(null, new Object[] { arguments });
} catch (IllegalAccessException e) {
throw new RuntimeException("impossible " + e);
}
}
/**
* Obtains the main section of the manifest of a JAR.
*
* @param jar the URL of a JAR; must not be <code>null</code>.
*
* @return the representation of the main section of the manifest of the
* given JAR <code>jar</code>, or <code>null</code> if the given JAR does
* not have a manifest.
*
* @throws IOException if there are any problems processing the given JAR
* <code>jar</code>.
*/
public static Attributes getJarMainAttributes(URL jar) throws IOException {
JarInputStream s = new JarInputStream(jar.openStream());
Manifest mf;
try {
mf = s.getManifest();
} finally {
s.close();
}
return mf == null ? null : mf.getMainAttributes();
}
private static URL[] createUrls(URL base, URL[] classPath)
throws MalformedURLException
{
final int JARS = 4;
URL[] urls = new URL[JARS + (classPath == null ? 0 : classPath.length)];
urls[0] = new URL(base, "java_uno.jar"); //TODO get rid of it here
urls[1] = new URL(base, "juh.jar");
urls[2] = new URL(base, "jurt.jar");
urls[3] = new URL(base, "ridl.jar");
if (classPath != null) {
System.arraycopy(classPath, 0, urls, JARS, classPath.length);
}
return urls;
}
}
|
