package rac;

/**
 * The interface for the visitor design pattern algorithm for processing the
 * internal doubly-linked circular list of the RACont.
 * @author S. Wong
 */
public interface IRACVisitor {
    /**
     * The method called when the RACStopNode is encountered.
     * @param host The RACStopNode that called this method.
     * @param param The external parameter passed to this algorithm.
     * @return The return value of this algorithm.
     */
    public abstract Object stopCase(RACStopNode host, Object param);

    /**
     * The method called when the RACDataNode is encountered.
     * @param host The RACDataNode that called this method.
     * @param param The external parameter passed to this algorithm.
     * @return The return value of this algorithm.
     */
    public abstract Object dataCase(RACDataNode host, Object param);
}