/*
* Copyright 1990-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*
*/
/*
* A classloader that restricts access to any of the class in
* the JSRRestrictedClasses.txt configuration file.
*/
package sun.misc;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.HashSet;
public class CDCAppClassLoader extends URLClassLoader {
// Classes that are not allowed to be accessed by CDC apps
private static HashSet restrictedClasses = new HashSet();
static {
getRestrictedClasses();
}
private static boolean getRestrictedClasses() {
String filename = System.getProperty("java.home") +
File.separator + "lib" + File.separator +
"JSRRestrictedClasses.txt";
BufferedReader in;
try {
in = new BufferedReader(new FileReader(filename));
} catch(IOException e) {
System.err.println("Could not open "+filename);
return false;
}
try {
while (true) {
String s = in.readLine();
if (s == null) {
break; // eof
}
if (s.length() == 0) {
continue;
}
if (s.charAt(0) == '#') {
continue; // comment
}
// it's a classname, add it to the restricted set
restrictedClasses.add(s);
}
in.close();
} catch (IOException e) {
System.err.println("Failed to read " + filename);
return false;
}
return true;
}
public CDCAppClassLoader(URL[] urls, ClassLoader parent) {
super(urls, parent);
}
public Class loadClass(String name)
throws ClassNotFoundException
{
// First check if the class is restricted
if (restrictedClasses.contains(name)) {
throw new ClassNotFoundException(name);
}
return super.loadClass(name);
}
}