PArrayIterator.h

#ifndef UTIL_P_ARRAY_ITERATOR_H
#define UTIL_P_ARRAY_ITERATOR_H
 
/*
* Util Package - C++ Utilities for Scientific Computation
*
* Copyright 2010 - 2017, The Regents of the University of Minnesota
* Distributed under the terms of the GNU General Public License.
*/
 
namespace Util
{
 
   template <typename Data>
   class PArrayIterator
   {
 
   public:
 
      PArrayIterator()
       : current_(0),
         end_(0),
         data_(0)
      {}
 
      void setCurrent(Data** ptr)
      { 
         current_ =  ptr;
         data_    = *ptr; 
      }
 
      void setEnd(Data** ptr)
      {  end_ = ptr; }
 
      void setNull()
      {
         current_ = 0; 
         end_     = 0; 
         data_    = 0; 
      }
 
      bool isEnd() const
      {  return (current_ == end_); }
 
      bool notEnd() const
      {  return (current_ != end_); }
 
      Data* get() const
      {  return data_; }
 
 
      
      Data& operator* () const
      {
         assert(data_); 
         return *data_; 
      }
 
      Data* operator -> () const
      {
         assert(data_); 
         return data_; 
      }
 
      PArrayIterator<Data>& operator++ ()
      {
         assert(current_);
         ++current_;
         if (current_ != end_) {
           data_ = *current_;
         } else {
           data_ = 0;
         }
         return *this;
      }
 
      
   private:
 
      // Pointer to the current Data* pointer.
      Data** current_;
 
      // Pointer to one element one past last Data* pointer in the set.
      Data** end_;
 
      // Pointer to current Data object.
      Data* data_;
 
   };
 
} 
#endif