How to resolve a Class<> object received from network in the default classloader?

I am sending a Class<> object over the network.

Now, when I receive the object on the other side, I'd like to be able to 开发者_Go百科load it to the current class loader. The problem is that the only method that seems to do the job is protected (resolveClass(Class<?> c)). So, to use it, I'd have to extend the default classloader.

So, is there any easier way to do this?

Constraints: Unfortunately, I can't write to the server's disk, so the obvious solution to send the .class file instead of an object is not feasible.

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When you use Class.forName(className) it resolves the class. You can also use ClassLoader.loadClass(classname) for a specific class loader.

The only way to load a class into the classloader is to have the byte code for that class. This only works if a class of this name has not been loaded before. You can force the class loader to load a class from byte code by calling ClassLoader.defineClass() using reflection.

You can get the byte code from the class loader

byte[] bytes = IOUtils.toByteArray(
     myClass.getClassLoader().getResourceAsInputStream(
         myClass.getName().replace('.','/')+".class"));

Note: to load a class, all it dependacies have to be loaded first. This is easy if all the dependencies are available, but get more complicated if you need to extract more classes.