samples/factory/main.cxx

   1
   2 #include "abstract.h"
   3
   4 #include <ptlib/pprocess.h>
   5
   6 #include <ptclib/http.h>
   7 #include <ptclib/ptts.h>
   8 #include <ptclib/pwavfile.h>
   9
  10
  11
  12 class Factory : public PProcess
  13 {
  14   public:
  15     Factory()
  16     : PProcess() { }
  17     void Main();
  18 };
  19
  20 PCREATE_PROCESS(Factory)
  21
  22
  23 template <class BaseClass, class TypeClass = PString>
  24 class Display
  25 {
  26 public:
  27   static void ConcreteTypes(const char * title)
  28   {
  29     cout << "\nConcrete types for " << title << ':' << endl;
  30     typename PFactory<BaseClass, TypeClass>::KeyList_T keys = PFactory<BaseClass, TypeClass>::GetKeyList();
  31     typename PFactory<BaseClass, TypeClass>::KeyList_T::const_iterator r;
  32     for (r = keys.begin(); r != keys.end(); ++r)
  33       cout << "  " << *r << endl;
  34
  35     cout << endl;
  36   }
  37
  38   static void TestFactory()
  39   {
  40     typename PFactory<BaseClass, TypeClass>::KeyList_T keyList = PFactory<BaseClass, TypeClass>::GetKeyList();
  41     unsigned i;
  42     for (i = 0; i < keyList.size(); i++) {
  43       for (int j = 0; j < 3; j++)
  44       {
  45         MyAbstractClass * c = PFactory<BaseClass, TypeClass>::CreateInstance(keyList[i]);
  46         if (c == NULL)
  47           cout << "Cannot instantiate class " << keyList[i] << endl;
  48         else
  49           cout << keyList[i] << "::Function returned \"" << c->Function() << "\", instance " << (void *)c << endl;
  50       }
  51     }
  52   }
  53 };
  54
  55
  56 void Factory::Main()
  57 {
  58   Display<MyAbstractClass>::ConcreteTypes("MyAbstractClass by PString");
  59   Display<MyAbstractClass>::TestFactory();
  60
  61   Display<MyAbstractClass, unsigned>::ConcreteTypes("MyAbstractClass by unsigned");
  62   Display<MyAbstractClass, unsigned>::TestFactory();
  63
  64   Display<PURLScheme>::ConcreteTypes("PURLScheme");
  65   Display<PTextToSpeech>::ConcreteTypes("PTextToSpeech");
  66   Display<PPluginModuleManager>::ConcreteTypes("PPluginModuleManager");
  67 }