ACE/examples/APG/Containers/Hash_Map.cpp

   1 #include "ace/Hash_Map_Manager.h"
   2 #include "ace/Synch.h" // needed for the lock
   3 #include "ace/Functor.h"
   4 #include "DataElement.h"
   5
   6 // Listing 1 code/ch05
   7 // Little helper class.
   8 template<class EXT_ID, class INT_ID>
   9 class Hash_Map :
  10       public ACE_Hash_Map_Manager_Ex<EXT_ID, INT_ID,
  11       ACE_Hash<EXT_ID>, ACE_Equal_To<EXT_ID>, ACE_Null_Mutex>
  12 {};
  13 // Listing 1
  14
  15 class Hash_Map_Example
  16 {
  17 public:
  18   // Constructor
  19   Hash_Map_Example ();
  20
  21   // Illustrate the hash map.
  22   int run ();
  23
  24   // Use the forward iterator.
  25   void iterate_forward ();
  26
  27   // Use the reverse iterator.
  28   void iterate_reverse ();
  29
  30   // Remove all the elements from the map.
  31   void remove_all ();
  32
  33 private:
  34   Hash_Map<int, DataElement> map_;
  35 };
  36
  37 // Listing 2 code/ch05
  38 Hash_Map_Example::Hash_Map_Example()
  39 {
  40   ACE_TRACE ("Hash_Map_Example::Hash_Map_Example");
  41
  42   map_.open (100);
  43 }
  44 // Listing 2
  45
  46 int Hash_Map_Example::run ()
  47 {
  48   ACE_TRACE ("Hash_Map_Example::run");
  49
  50   for (int i = 0; i < 100; i++)
  51     {
  52       map_.bind (i, DataElement(i));
  53     }
  54
  55   ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("Map has\n")));
  56   for (int j = 0; j < 100; j++)
  57     {
  58       DataElement d;
  59       map_.find (j,d);
  60       ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("%d:"), d.getData ()));
  61     }
  62   ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("\n")));
  63
  64   // Use the forward iterator.
  65   this->iterate_forward ();
  66
  67   // Use the reverse iterator.
  68   this->iterate_reverse ();
  69
  70   // Remove all the elements from the map.
  71   this->remove_all ();
  72
  73   // Iterate through the map again.
  74   this->iterate_forward ();
  75
  76   return 0;
  77 }
  78
  79 void Hash_Map_Example::iterate_forward ()
  80 {
  81   ACE_TRACE ("Hash_Map_Example::iterate_forward");
  82
  83   ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("Forward Iteration\n")));
  84   for (Hash_Map<int, DataElement>::iterator iter = map_.begin ();
  85        iter != map_.end (); iter++)
  86     {
  87       ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("%d:"), (*iter).int_id_.getData ()));
  88     }
  89   ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("\n")));
  90 }
  91
  92 void Hash_Map_Example::iterate_reverse ()
  93 {
  94   ACE_TRACE ("Hash_Map_Example::iterate_reverse");
  95
  96   ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("Reverse Iteration\n")));
  97   for (Hash_Map<int, DataElement>::reverse_iterator iter = map_.rbegin ();
  98        iter != map_.rend (); iter++)
  99     {
 100       ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("%d:"), (*iter).int_id_.getData ()));
 101     }
 102   ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("\n")));
 103 }
 104
 105 void Hash_Map_Example::remove_all ()
 106 {
 107   ACE_TRACE ("Hash_Map_Example::remove_all");
 108   map_.unbind_all ();
 109 }
 110
 111 int ACE_TMAIN (int, ACE_TCHAR *[])
 112 {
 113   Hash_Map_Example me;
 114   return me.run ();
 115 }
 116