[jboss-user] [Javassist] - Saving proxy classes and using them in Android
Eric H
do-not-reply at jboss.com
Mon Mar 29 01:59:27 EDT 2010
Eric H [http://community.jboss.org/people/EricJava] created the discussion
"Saving proxy classes and using them in Android"
To view the discussion, visit: http://community.jboss.org/message/534357#534357
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I am new to the wonderful world of Javassist, and I now have a question:
I have used the very easy and convenient ProxyFactory in the usual way:
{code} final ProxyFactory proxyFactory = new ProxyFactory();
proxyFactory.writeDirectory = "/tmp";
proxyFactory.setSuperclass(Invoice.class);
final MethodHandler methodHandler = new MethodHandler() {
public Object invoke(Object self, Method m, Method proceed,
Object[] args) throws Throwable {
System.out.println("Name: " + m.getName());
return proceed.invoke(self, args); // execute the original method.
}
};
proxyFactory.setFilter(new MethodFilter() {
public boolean isHandled(Method m) {
// ignore finalize()
return !m.getName().equals("finalize");
}
});
final Class klass = proxyFactory.createClass();
Invoice invoice = (Invoice) klass.newInstance();
((ProxyObject) invoice).setHandler(methodHandler);
{code}
That works great. When I call methods on the invoice object there, I immediately see that my MethodHandler is invoked. Super-cool!
Also, it does one more thing: it saves a new class file, with a name like Invoice_$$_javassist_0.class .
What I would like to do is be able to use that generated class, without needing to have the bytecode present. The reason for this is I want to use it within Android, and Android doesn't use regular class files. If I can use the ProxyFactory to write out the class files, then I can build my Android DEX files using those class files. But I don't know how to load or make use of the generated files like Invoice_$$_javassist_0.class.
Does my question make sense? I assume that ProxyFactory is able to save those class files for a good reason, but I can't find out how to make use of them.
Thanks
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