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/*
* 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.comp.loader;
import com.sun.star.lib.unoloader.UnoClassLoader;
import com.sun.star.lib.util.WeakMap;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.StringTokenizer;
import java.util.jar.Attributes;
final class RegistrationClassFinder {
public static Class<?> find(String locationUrl)
throws ClassNotFoundException, IOException
{
synchronized (map) {
Class<?> c = (Class<?>) WeakMap.getValue(map.get(locationUrl));
if (c != null) {
return c;
}
}
URL url = new URL(locationUrl);
checkAccess(url);
Attributes attr = UnoClassLoader.getJarMainAttributes(url);
String name = attr == null
? null : attr.getValue("RegistrationClassName");
if (name == null) {
return null;
}
ClassLoader cl1 = RegistrationClassFinder.class.getClassLoader();
ClassLoader cl2;
if (cl1 instanceof UnoClassLoader) {
cl2 = ((UnoClassLoader) cl1).getClassLoader(url, attr);
} else {
cl2 = URLClassLoader.newInstance(new URL[] { url }, cl1);
}
Class<?> c = cl2.loadClass(name);
synchronized (map) {
Class<?> c2 = (Class<?>) WeakMap.getValue(map.get(locationUrl));
if (c2 != null) {
return c2;
}
map.put(locationUrl, c);
}
return c;
}
private RegistrationClassFinder() {} // do not instantiate
private static void checkAccess(URL url) throws ClassNotFoundException {
// The system property com.sun.star.comp.loader.CPLD_ACCESSPATH was
// introduced as a hack to restrict which UNO components can be
// instantiated. It seems to be unused nowadays, and should probably be
// replaced by the native Java security features, anyway.
if (accessPath != null) {
if (!url.getProtocol().equals("file")) {
throw new ClassNotFoundException(
"Access restriction: <" + url + "> is not a file URL");
}
String p;
try {
p = new File(url.getFile()).getCanonicalPath();
} catch (IOException e) {
throw new ClassNotFoundException(
"Access restriction: <" + url + "> is bad: " + e);
}
for (int i = 0; i < accessPath.length; ++i) {
String p2 = accessPath[i];
if (p.startsWith(p2) && p.length() > p2.length()
&& (p2.charAt(p2.length() - 1) == File.separatorChar
|| p.charAt(p2.length()) == File.separatorChar))
{
return;
}
}
throw new ClassNotFoundException(
"Access restriction: <" + url + "> is restricted");
}
}
private static final WeakMap map = new WeakMap();
private static final String[] accessPath;
static {
String[] ap = null;
String p = System.getProperty(
"com.sun.star.comp.loader.CPLD_ACCESSPATH");
if (p != null) {
StringTokenizer t = new StringTokenizer(p, ";");
ap = new String[t.countTokens()];
int i = 0;
while (t.hasMoreTokens()) {
try {
ap[i] = new File(t.nextToken()).getCanonicalPath();
++i;
} catch (IOException e) {}
}
if (i != ap.length) {
String[] ap2 = new String[i];
System.arraycopy(ap, 0, ap2, 0, i);
ap = ap2;
}
}
accessPath = ap;
}
}
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