#ifndef _LIST_H
#define _LIST_H

#include <Node.h>

class List {
    public:
        List();

        virtual List *copy()                  = 0;
                int   getQuantity();

        virtual void  append(Node *, Node *)  = 0;
        virtual void  append(List *, List *)  = 0;
        virtual void  insert(Node *, Node *)  = 0;
        virtual void  insert(List *, List *)  = 0;
        virtual Node *obtain(Node *)          = 0;
        virtual List *obtain(List *)          = 0;

        virtual void  display(int)            = 0;
        virtual void  sort(int)               = 0;
        virtual void  swap(Node *, Node *)    = 0;
        virtual Node *find(int)               = 0;

        virtual Node *getStart()              = 0;
        virtual Node *getEnd()                = 0;

        virtual List *getNext()               = 0;
        virtual void  setNext(List *)         = 0;

        virtual List *getPrev()               = 0;
        virtual void  setPrev(List *)         = 0;

        virtual      ~List();

    protected:
                void  setQuantity(int);

        virtual void  setStart(Node *)        = 0;
        virtual void  setEnd  (Node *)        = 0;

        virtual Node *setListPosition(int)    = 0;
        virtual int   getListPosition(Node *) = 0;

        virtual List *setListNumber(int)      = 0;
        virtual int   getListNumber(List *)   = 0;

    private:
                int   quantity;
};
#endif