Instantiate abstract class bean with abstract methods intercepted by AOP or otherwise

[Infeligo]

Hi.

What I want to do is following. I write an abstract class like this:

public abstract class MyService {

    public abstract String getSomeValue();

    public String getAnotherValue() { return "test" };

}

What I aim for is that this class gets enhanced by AOP or CGLIB directly, so that calling abstract methods is intercepted and replaced by some logic. I don't want to use interfaces, because I still want non-abstract methods there.

At what level and how should I implement this? Enhancing some class with CGLIB or advising with AOP is not a problem, but I can't think of a way to properly put it all together. If it is possible to be done with AOP, then how? If I should use CGLIB, then at what point in beans lifecycle can I enhance my bean?

[pratikbhavsar]

Here's what you need.

applicationContext.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.xsd">


	<bean id="myBean" name="myBean" class="MyService">
		<replaced-method name="getSomeValue" replacer="myBeanHelper">
			<arg-type>String</arg-type>
		</replaced-method>
	</bean>

	<bean id="myBeanHelper" name="myBeanHelper" class="MyBeanHelper">
	</bean>
</beans>

MyService.java

public abstract class MyService {

	public MyService(){};
	
    public abstract String getSomeValue();

    public String getAnotherValue() { return "test"; };

}

MyBeanHealper.java

public class MyBeanHelper implements MethodReplacer{

	public Object reimplement(Object obj, java.lang.reflect.Method method,
			Object[] args) throws Throwable {
        return "some value";
	}
}