hash_map.cpp

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// $Id: Hash_Map.cpp 72205 2006-04-20 10:20:34Z jwillemsen $

#include "ace/Hash_Map_Manager.h"
#include "ace/Synch.h" // needed for the lock
#include "ace/Functor.h"
#include "DataElement.h"

// Listing 1 code/ch05
// Little helper class.
template<class EXT_ID, class INT_ID>
class Hash_Map :
      public ACE_Hash_Map_Manager_Ex<EXT_ID, INT_ID,
      ACE_Hash<EXT_ID>, ACE_Equal_To<EXT_ID>, ACE_Null_Mutex>
{};
// Listing 1

class Hash_Map_Example
{
public:
  // Constructor
  Hash_Map_Example ();

  // Illustrate the hash map.
  int run (void);

  // Use the forward iterator.
  void iterate_forward (void);

  // Use the reverse iterator.
  void iterate_reverse (void);

  // Remove all the elements from the map.
  void remove_all (void);

private:
  Hash_Map<int, DataElement> map_;
};

// Listing 2 code/ch05
Hash_Map_Example::Hash_Map_Example()
{
  ACE_TRACE (ACE_TEXT ("Hash_Map_Example::Hash_Map_Example"));

  map_.open (100);
}
// Listing 2

int Hash_Map_Example::run (void)
{
  ACE_TRACE (ACE_TEXT ("Hash_Map_Example::run"));

  for (int i = 0; i < 100; i++)
    {
      map_.bind (i, DataElement(i));
    }

  ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("Map has \n")));
  for (int j = 0; j < 100; j++)
    {
      DataElement d;
      map_.find (j,d);
      ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("%d:"), d.getData ()));
    }
  ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("\n")));

  // Use the forward iterator.
  this->iterate_forward ();

  // Use the reverse iterator.
  this->iterate_reverse ();

  // Remove all the elements from the map.
  this->remove_all ();

  // Iterate through the map again.
  this->iterate_forward ();

  return 0;
}

void Hash_Map_Example::iterate_forward (void)
{
  ACE_TRACE (ACE_TEXT ("Hash_Map_Example::iterate_forward"));

  ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("Forward Iteration \n")));
  for (Hash_Map<int, DataElement>::iterator iter = map_.begin ();
       iter != map_.end (); iter++)
    {
      ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("%d:"), (*iter).int_id_.getData ()));
    }
  ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("\n")));
}

void Hash_Map_Example::iterate_reverse (void)
{
  ACE_TRACE (ACE_TEXT ("Hash_Map_Example::iterate_reverse"));

  ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("Reverse Iteration \n")));
  for (Hash_Map<int, DataElement>::reverse_iterator iter = map_.rbegin ();
       iter != map_.rend (); iter++)
    {
      ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("%d:"), (*iter).int_id_.getData ()));
    }
  ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("\n")));
}

void Hash_Map_Example::remove_all (void)
{
  ACE_TRACE (ACE_TEXT ("Hash_Map_Example::remove_all"));
  map_.unbind_all ();
}

int ACE_TMAIN (int, ACE_TCHAR *[])
{
  Hash_Map_Example me;
  return me.run ();
}