samples/factory/main.cxx

   1
   2 #include <ptlib.h>
   3
   4 #include <ptclib/http.h>
   5 #include <ptclib/ptts.h>
   6 #include <ptclib/pwavfile.h>
   7
   8 #include "abstract.h"
   9
  10
  11 class Factory : public PProcess
  12 {
  13   public:
  14     Factory()
  15     : PProcess() { }
  16     void Main();
  17 };
  18
  19 PCREATE_PROCESS(Factory)
  20
  21
  22 template <class BaseClass, typename TypeClass = PString>
  23 class Display
  24 {
  25 public:
  26   static void ConcreteTypes(const char * title)
  27   {
  28     cout << "\nConcrete types for " << title << ':' << endl;
  29     PFactory<BaseClass, TypeClass>::KeyList_T keys = PFactory<BaseClass, TypeClass>::GetKeyList();
  30     PFactory<BaseClass, TypeClass>::KeyList_T::const_iterator r;
  31     for (r = keys.begin(); r != keys.end(); ++r)
  32       cout << "  " << *r << endl;
  33
  34     cout << endl;
  35   }
  36
  37   static void TestFactory()
  38   {
  39     PFactory<BaseClass, TypeClass>::KeyList_T keyList = PFactory<MyAbstractClass, TypeClass>::GetKeyList();
  40     unsigned i;
  41     for (i = 0; i < keyList.size(); i++) {
  42       for (int j = 0; j < 3; j++)
  43       {
  44         MyAbstractClass * c = PFactory<MyAbstractClass, TypeClass>::CreateInstance(keyList[i]);
  45         if (c == NULL)
  46           cout << "Cannot instantiate class " << keyList[i] << endl;
  47         else
  48           cout << keyList[i] << "::Function returned \"" << c->Function() << "\", instance " << (void *)c << endl;
  49       }
  50     }
  51   }
  52 };
  53
  54
  55 void Factory::Main()
  56 {
  57   Display<MyAbstractClass>::ConcreteTypes("MyAbstractClass by PString");
  58   Display<MyAbstractClass>::TestFactory();
  59
  60   Display<MyAbstractClass, unsigned>::ConcreteTypes("MyAbstractClass by unsigned");
  61   Display<MyAbstractClass, unsigned>::TestFactory();
  62
  63   Display<PURLScheme>::ConcreteTypes("PURLScheme");
  64   Display<PTextToSpeech>::ConcreteTypes("PTextToSpeech");
  65   Display<PPluginModuleManager>::ConcreteTypes("PPluginModuleManager");
  66 }