File: Main.java
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.springframework.aop.framework.ProxyFactory;
public class Main {
public static void main(String[] args) throws Exception {
MessageWriter target = new MessageWriter();
ProxyFactory pf = new ProxyFactory();
pf.addAdvice(new MessageDecorator());
pf.setTarget(target);
MessageWriter proxy = (MessageWriter) pf.getProxy();
target.writeMessage();
System.out.println("");
proxy.writeMessage();
}
}
class MessageWriter {
public void writeMessage() {
System.out.print("A");
}
}
class MessageDecorator implements MethodInterceptor {
public Object invoke(MethodInvocation invocation) throws Throwable {
System.out.print("B ");
Object retVal = invocation.proceed();
System.out.println("C");
return retVal;
}
}