[Java] Chain of responsibility pattern (recursive implementation)

Hello,

I found out an interesting and useful implementation of Chain of responsibility pattern and would like to share it.:

On Classical implementation, each concrete handler is responsible of it's own successor object (the ring  which comes from itself) as well. This creates a dependency problem and unnecessarry complexity..

For classical implementation look: http://www.oodesign.com/chain-of-responsibility-pattern.html

This implementation has a recursive structure and it triggers a chain reaction with calling the first ring of the chain.

For details: http://www.javaworld.com/article/2072857/java-web-development/the-chain-of-responsibility-pattern-s-pitfalls-and-improvements.html?page=2#resources

public abstract class GroupChain {

       private GroupChain next;

       public void setNext(GroupChain nextG) {

             next = nextG;

       }

       public final Integer start(int value) {

             Integer result = this.execute(value);

             if (next != null) {

                    Integer nextResult = next.start(value);

                    if (nextResult != null)

                           result += (nextResult);

             }

             return result;

       }

       protected abstract Integer execute(int value);

}

public class FirstChain extends GroupChain {

       @Override

       protected Integer execute(int value) {

            

             return value * 2;

       }

}

public class SecondChain extends GroupChain{

       @Override

       protected Integer execute(int value) {

            

             return value * 5;

       }

}

public class ThirdChain extends GroupChain {

       @Override

       protected Integer execute(int value) {

             return value * 2;

       }

}

public class Orchestrator {

       public static void main(String[] args) {

             FirstChain firstChain = new FirstChain();

             SecondChain secondChain = new SecondChain();

             ThirdChain thirdChain = new ThirdChain();

             firstChain.setNext(secondChain);

             secondChain.setNext(thirdChain);

             System.out.println(firstChain.start(3));

       }

}