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/*
* Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code 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 code 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 in the LICENSE file that
* accompanied this code).
*
* 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
*
*/
import java.util.*;
import java.io.*;
class ClassLoaderTarg extends ClassLoader {
private Hashtable loaded = new Hashtable();
String id;
public ClassLoaderTarg(String id) {
this.id = id;
}
private byte[] loadClassBytes(String cname)
throws ClassNotFoundException {
StringTokenizer stk = new StringTokenizer(System.getProperty("java.class.path"),
File.pathSeparator);
/* search class path for the class file */
while (stk.hasMoreTokens()) {
File cfile = new File(stk.nextToken() + File.separator +
cname + ".class");
if (cfile.exists()) {
System.out.println("loading from: " + cfile);
return loadBytes(cfile, cname);
} else {
System.out.println("no file: " + cfile + " - trying next");
}
}
throw new ClassNotFoundException(cname);
}
private byte[] loadBytes(File cfile, String cname)
throws ClassNotFoundException {
try {
long fsize = cfile.length();
if (fsize > 0) {
FileInputStream in = new FileInputStream(cfile);
byte[] cbytes = new byte[(int)fsize];
in.read(cbytes);
in.close();
return cbytes;
}
} catch (IOException exc) {
// drop down
}
throw new ClassNotFoundException(cname);
}
public synchronized Class findClass(String cname)
throws ClassNotFoundException {
Class klass = (Class)loaded.get(cname);
if (klass == null) {
byte[] cbytes = loadClassBytes(cname);
klass = defineClass(cname, cbytes, 0, cbytes.length);
loaded.put(cname, klass);
System.err.println("ClassLoaderTarg (" + id +") loaded: " + cname);
}
return klass;
}
protected void finalize() {
UnloadEventTarg.classLoaderFinalized(id);
try {
super.finalize();
} catch (Throwable thrown) {
}
}
}
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