package clist.visitor;

import clist.*;

public class Stub implements IAlgo
{
    private CList _stop;

    public Stub(CList stop)
    {
        _stop = stop;
    }

    public Object emptyCase(CList host, Object input)
    {
        // ...
        return null;  // dummy value for stub
    }

    /**
     * Needs to distinguish the case when the host has one element
     * from the case when the host has more than one element.
     */
    public Object nonEmptyCase(CList host, Object input)
    {
        // stub assumes Clockwise, can change consistently for CounterClockwise

        CList tail = host.getRestClockwise();

        if (tail == _stop) {
            // something using host.getFirstClockwise()
        }
        else {
            // something using host.getFirstClockwise()
            // something using tail.executeClockwise(this, input);
        }
        return null;  // dummy value for stub
    }
}