ACE/examples/APG/Containers/DataElement.h

   1 /* -*- C++ -*- */
   2 #if !defined(DATAELEMENT_H)
   3 #define DATAELEMENT_H
   4
   5 class DataElementEx;
   6
   7 // Listing 1 code/ch05
   8 // A simple data element class.
   9 class DataElement
  10 {
  11   friend class DataElementEx;
  12
  13 public:
  14   DataElement () : data_ (0) { count_++; }
  15
  16   DataElement (int data) : data_(data) { count_++; }
  17
  18   DataElement (const DataElement& e)
  19   {
  20     data_ = e.getData ();
  21     count_++;
  22   }
  23
  24   DataElement & operator= (const DataElement& e)
  25   {
  26     data_ = e.getData ();
  27     return *this;
  28   }
  29
  30   bool operator== (const DataElement& e)
  31   { return this->data_ == e.data_; }
  32
  33   ~DataElement () { count_--; }
  34
  35   int getData () const { return data_; }
  36
  37   void setData (int val) { data_ = val; }
  38
  39   static int numOfActiveObjects () { return count_; }
  40
  41  private:
  42   int data_;
  43   static int count_;
  44 };
  45 // Listing 1
  46
  47 int DataElement::count_ = 0;
  48
  49 #endif /*DATAELEMENT_H*/
  50