package clist;

abstract class ANode
{
  abstract Object getDat(CLList parent);
  abstract void setDat(Object dat, CLList parent);

  abstract CLList getClockwiseTail(CLList parent);
  abstract CLList getCounterwiseTail(CLList parent);

  abstract void insertClockwise(Object dat, CLList parent);
  abstract void insertCounterwise(Object dat, CLList parent);

  abstract Object removeClockwise(CLList parent);
  abstract Object removeCounterwise(CLList parent);

  abstract Object execClockwise(ICLVisitor algo, CLList start, Object input, CLList parent);
  abstract Object execCounterwise(ICLVisitor algo, CLList start, Object input, CLList parent);

  abstract void setClockwiseParent(CLList cllist);
  abstract void setCounterwiseParent(CLList cllist);
}