Created
August 17, 2011 17:23
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Creating a proxy with JavAssist
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package mit.proxy; | |
import java.lang.reflect.Method; | |
import java.util.ArrayList; | |
import javassist.util.proxy.MethodHandler; | |
import javassist.util.proxy.ProxyFactory; | |
import javassist.util.proxy.ProxyObject; | |
public class ProxyCreator { | |
public static void main(String[] args){ | |
try { | |
ArrayList list = create(ArrayList.class); | |
list.add("foo"); | |
System.out.println(list.getClass().getName()); | |
System.out.println("==========================="); | |
// Foo foo = create(Foo.class); | |
Bar bar = create(Bar.class); | |
bar.bar(); | |
bar.bar1(); | |
bar.bar2(); | |
} catch (Exception e) { | |
e.printStackTrace(); | |
} | |
} | |
public static <T> T create(Class<T> classs) throws Exception { | |
ProxyFactory factory = new ProxyFactory(); | |
factory.setSuperclass(classs); | |
Class clazz = factory.createClass(); | |
MethodHandler handler = new MethodHandler() { | |
@Override | |
public Object invoke(Object self, Method overridden, Method forwarder, | |
Object[] args) throws Throwable { | |
System.out.println("do something "+overridden.getName()); | |
return forwarder.invoke(self, args); | |
} | |
}; | |
Object instance = clazz.newInstance(); | |
((ProxyObject) instance).setHandler(handler); | |
return (T) instance; | |
} | |
} | |
final class Foo{} | |
class Bar{ | |
public static void bar(){ | |
System.out.println("bar"); | |
} | |
public final void bar1(){ | |
System.out.println("bar1"); | |
} | |
public void bar2(){ | |
System.out.println("bar2"); | |
} | |
} |
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How can we profile static methods.