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1 package hudson.remoting;
2
3 import org.objectweb.asm.ClassReader;
4 import org.objectweb.asm.ClassWriter;
5
6 import java.io.IOException  ;
7 import java.io.InputStream ;
8 import java.io.File ;
9 import java.io.OutputStream ;
10 import java.io.FileOutputStream ;
11 import java.net.URL ;
12
13
19 class DummyClassLoader extends ClassLoader {
20 public DummyClassLoader(ClassLoader parent) {
21 super(parent);
22 }
23
24
25 protected Class <?> findClass(String name) throws ClassNotFoundException {
26 if(name.equals("hudson.remoting.test.TestCallable")) {
27 try {
29 byte[] bytes = loadTransformedClassImage(name);
30 return defineClass(name,bytes,0,bytes.length);
31 } catch (IOException e) {
32 throw new ClassNotFoundException ("Bytecode manipulation failed",e);
33 }
34 }
35
36 return super.findClass(name);
37 }
38
39 private byte[] loadTransformedClassImage(final String name) throws IOException {
40 InputStream in = getResourceAsStream("hudson/remoting/TestCallable.class");
41
42 ClassReader cr = new ClassReader(in);
44 ClassWriter w = new ClassWriter(cr,true) {
45 public void visit(int version, int access, String _name, String sig, String superName, String [] interfaces) {
46 super.visit(version, access, name.replace('.','/'), sig, superName, interfaces);
47 }
48 };
49 cr.accept(w,false);
50
51 return w.toByteArray();
52 }
53
54
55 protected URL findResource(String name) {
56 if(name.equals("hudson/remoting/test/TestCallable.class")) {
57 try {
58 File f = File.createTempFile("rmiTest","class");
59 OutputStream os = new FileOutputStream (f);
60 os.write(loadTransformedClassImage("hudson.remoting.test.TestCallable"));
61 os.close();
62 f.deleteOnExit();
63 return f.toURL();
64 } catch (IOException e) {
65 return null;
66 }
67 }
68 return super.findResource(name);
69 }
70 }
71 |
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