Spring Method Replacer

Method Replacer Implementation:

Greeting.java:

package com.lnn.method.replacer;

public interface Greeting {

      public String greet();

}

GreetingImpl.java:

package com.lnn.method.replacer;

public class GreetingImpl implements Greeting {

      @Override

      public String greet() {

            return "Good Morning!";

      }

}

GreetingReplacer.java:

package com.lnn.method.replacer;

import java.lang.reflect.Method;

import org.springframework.beans.factory.support.MethodReplacer;

public class GreetingReplacer implements MethodReplacer {

      @Override

      public Object reimplement(Object obj, Method method, Object[] args) throws Throwable {

            return "Good Night!";

      }

}

replacer.xml:

<beans xmlns="http://www.springframework.org/schema/beans"

      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

      xsi:schemaLocation="http://www.springframework.org/schema/beans

      http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

      <bean id="greeting" class="com.lnn.method.replacer.GreetingImpl">

            <replaced-method name="greet" replacer="greetingReplacer" />

      </bean>

      <bean id="greetingReplacer" class="com.lnn.method.replacer.GreetingReplacer" /> 

</beans>

Test.java:

package com.lnn.method.replacer;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {

      public static void main(String[] args) {

            ApplicationContext context = new ClassPathXmlApplicationContext("replacer.xml");

            Greeting greeting = context.getBean("greeting", Greeting.class);

            System.out.println(greeting.greet());

      }

}