Source Code : AOP Annotation

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AOP Annotation

       
File: Main.java

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Method;

import org.springframework.aop.Advisor;
import org.springframework.aop.AfterReturningAdvice;
import org.springframework.aop.MethodBeforeAdvice;
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.aop.support.DefaultPointcutAdvisor;
import org.springframework.aop.support.annotation.AnnotationMatchingPointcut;

public class Main {
  public static void main(String[] args) {
    SampleBean target = new SampleBean();
    AnnotationMatchingPointcut pc = new AnnotationMatchingPointcut(null, SimpleAnnotation.class);
    Advisor advisor = new DefaultPointcutAdvisor(pc, new SimpleBeforeAdvice());

    ProxyFactory pf = new ProxyFactory();
    pf.setTarget(target);
    pf.addAdvisor(advisor);

    SampleBean proxy = (SampleBean) pf.getProxy();
    proxy.getName();
    proxy.getHeight();
  }
}

class SimpleBeforeAdvice implements MethodBeforeAdvice {
  public void before(Method method, Object[] args, Object target) throws Throwable {
    System.out.println("Before method " + method);
  }
}

@SimpleAnnotation
class SampleBean {
  @SimpleAnnotation
  public String getName() {
    return "AAA";
  }

  public void setName(String name) {
  }

  public int getHeight() {
    return 201;
  }
}

@Target( { ElementType.METHOD, ElementType.TYPE })
@Retention(RetentionPolicy.RUNTIME)
@interface SimpleAnnotation {
}

class AnnotationAfterAdvice implements AfterReturningAdvice {
  public void afterReturning(Object returnValue, Method method, Object[] args, Object target)
      throws Throwable {
    System.out.print("After annotated method: " + method);
  }
}


  

           
       

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