BeforeAdvice

[Ritu Kapoor]

Hi,

I am new to Spring. Got the following issue. Please help to understand.

//TestBean.java
------------------------------------------------
package com.spring.aop.before;

public class TestBean {
	private String name;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
	
}

//Advice
--------------------

package com.spring.aop.before;

import java.lang.reflect.Method;

import org.springframework.aop.MethodBeforeAdvice;

public class TestBefore implements MethodBeforeAdvice {

	@Override
	public void before(Method arg0, Object[] arg1, Object arg2)
			throws Throwable {
		System.out.println("\n Method name::" + arg0 + "\n Argument List::" + arg1[0]
				+ "\n Target::" + arg2);

	}
}

//Main Class
package com.spring.aop.before;

import org.springframework.aop.framework.ProxyFactory;

public class TestBeforeAOP {
	public static void main(String args[]){
		
		TestBean bean = new TestBean();
		ProxyFactory factory = new ProxyFactory();
		factory.addAdvice(new TestBefore());
		factory.setTarget(bean);
		
		TestBean bean1 = (TestBean)factory.getProxy();
		
		bean1.setName("ABCCDDE");
	               System.out.println(bean1.getName());
	}
}

On executing this, I am getting following exception:

Method name::public void com.spring.aop.before.TestBean.setName(java.lang.String)
Argument List::ABCCDDE
Target::com.spring.aop.before.TestBean@fa9cf
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at com.spring.aop.before.TestBefore.before(TestBefore.java:12)
at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:49)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:635)
at com.spring.aop.before.TestBean$$EnhancerByCGLIB$$419f8de6.getName(<generated>)
at com.spring.aop.before.TestBeforeAOP.main(TestBeforeAOP.java:16)


Can anybody tell me the reason ?

Thanks,

Ritu

[Ritu Kapoor]

Resolved.