SortedObjects.h

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#ifndef SortedObjects_h
#define SortedObjects_h

#include <vector>

namespace pma {
  class SortedObjectBase;
  class SortedBranchBase;
}

class pma::SortedObjectBase {
  friend class pma::SortedBranchBase;

public:
  SortedObjectBase(void) : next(0), prev(0) {}
  SortedObjectBase(pma::SortedObjectBase* prevElement, pma::SortedObjectBase* nextElement);

  SortedObjectBase(const pma::SortedObjectBase&) : next(0), prev(0) {}

  virtual ~SortedObjectBase(void) { Disconnect(); }

  virtual void Disconnect(void);

  virtual bool AddNext(pma::SortedObjectBase* nextElement);
  virtual int RemoveNext(pma::SortedObjectBase* nextElement);

  virtual bool IsFirst(void) const { return !prev; }
  virtual bool IsLast(void) const { return !next; }

  virtual pma::SortedObjectBase* Prev(void) const { return prev; }
  virtual pma::SortedObjectBase* Next(unsigned int /* index */ = 0) const { return next; }
  virtual unsigned int NextCount(void) const
  {
    if (next)
      return 1;
    else
      return 0;
  }

protected:
  pma::SortedObjectBase* next;
  pma::SortedObjectBase* prev;
};

class pma::SortedBranchBase : public pma::SortedObjectBase {
public:
  SortedBranchBase(void) : pma::SortedObjectBase() {}
  SortedBranchBase(pma::SortedObjectBase* prevElement, pma::SortedObjectBase* nextElement = 0)
    : pma::SortedObjectBase(prevElement, nextElement)
  {
    if (nextElement) next_vector.push_back(next);
  }
  SortedBranchBase(const pma::SortedBranchBase&) : pma::SortedObjectBase() {}

  virtual ~SortedBranchBase(void) { Disconnect(); }

  virtual void Disconnect(void);

  virtual bool AddNext(pma::SortedObjectBase* nextElement);
  virtual int RemoveNext(pma::SortedObjectBase* nextElement);

  virtual pma::SortedObjectBase* Next(unsigned int index = 0) const
  {
    if (next_vector.size())
      return next_vector[index];
    else
      return 0;
  }
  virtual unsigned int NextCount(void) const { return next_vector.size(); }
  virtual bool IsLast(void) const { return !(next_vector.size()); }

protected:
  std::vector<pma::SortedObjectBase*> next_vector;
};

#endif