/*
* The MIT License
*
* Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package hudson.remoting;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.File;
import java.io.OutputStream;
import java.io.FileOutputStream;
import java.net.URL;
/**
* Used to load a dummy class <tt>hudson.remoting.test.TestCallable</tt>
* out of nowhere, to test {@link RemoteClassLoader}.
*
* @author Kohsuke Kawaguchi
*/
class DummyClassLoader extends ClassLoader {
public DummyClassLoader(ClassLoader parent) {
super(parent);
}
protected Class<?> findClass(String name) throws ClassNotFoundException {
if(name.equals("hudson.remoting.test.TestCallable")) {
// rename a class
try {
byte[] bytes = loadTransformedClassImage(name);
return defineClass(name,bytes,0,bytes.length);
} catch (IOException e) {
throw new ClassNotFoundException("Bytecode manipulation failed",e);
}
}
return super.findClass(name);
}
private byte[] loadTransformedClassImage(final String name) throws IOException {
InputStream in = getResourceAsStream("hudson/remoting/TestCallable.class");
// rename a class
ClassReader cr = new ClassReader(in);
ClassWriter w = new ClassWriter(cr,true) {
public void visit(int version, int access, String _name, String sig, String superName, String[] interfaces) {
super.visit(version, access, name.replace('.','/'), sig, superName, interfaces);
}
};
cr.accept(w,false);
return w.toByteArray();
}
protected URL findResource(String name) {
if(name.equals("hudson/remoting/test/TestCallable.class")) {
try {
File f = File.createTempFile("rmiTest","class");
OutputStream os = new FileOutputStream(f);
os.write(loadTransformedClassImage("hudson.remoting.test.TestCallable"));
os.close();
f.deleteOnExit();
return f.toURI().toURL();
} catch (IOException e) {
return null;
}
}
return super.findResource(name);
}
}