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  1. #include <map>
  2. #include <cstdlib>
  3. #include <iostream>
  4.  
  5. class Foo
  6. {
  7. public:
  8. 	void update( )
  9. 	{
  10. 		std::cout << "Foo::update()" << std::endl;
  11. 	}
  12. };
  13.  
  14. class Bar
  15. {
  16. public:
  17. 	void update( )
  18. 	{
  19. 		std::cout << "Bar::update()" << std::endl;
  20. 	}
  21. };
  22.  
  23. class Container
  24. {
  25. public:
  26. 	typedef void (Container::*updateMethod)();
  27. 	typedef std::map<std::string , updateMethod> UpdateMethodMap;
  28.  
  29. 	static const UpdateMethodMap	m_updateMethod;
  30. 	static UpdateMethodMap			initializeUpdateMethodMap();
  31. 	static updateMethod				getUpdateMethod( const std::string attributeName );
  32.  
  33. 	void update( const std::string name )
  34. 	{
  35. 		updateMethod updater = getUpdateMethod( name );
  36. 		if( updater )
  37. 		{
  38. 			(this->*updater)();
  39. 		}
  40. 	}
  41.  
  42. 	void updateFoo()
  43. 	{
  44. 		std::cout << "Container::updateFoo() -> ";
  45. 		m_foo.update();
  46. 	}
  47.  
  48. 	void updateBar()
  49. 	{
  50. 		std::cout << "Container::updateBar() -> ";
  51. 		m_bar.update();
  52. 	}
  53.  
  54. private:	
  55. 	Foo	m_foo;
  56. 	Bar	m_bar;
  57. };
  58.  
  59. const Container::UpdateMethodMap Container::m_updateMethod = Container::initializeUpdateMethodMap();
  60.  
  61. /////////////////////////////////////////////////////////////////////////////
  62.  
  63. Container::UpdateMethodMap Container::initializeUpdateMethodMap()
  64. {
  65. 	Container::UpdateMethodMap updateMethodMap;
  66.  
  67. 	updateMethodMap["foo"] = &Container::updateFoo;
  68. 	updateMethodMap["bar"] = &Container::updateBar;
  69.  
  70. 	return updateMethodMap;
  71. }
  72.  
  73. //////////////////////////////////////////////////////////////////////
  74.  
  75. Container::updateMethod Container::getUpdateMethod( const std::string name )
  76. {
  77. 	UpdateMethodMap::const_iterator updateMethodMapItx = m_updateMethod.find( name );
  78.  
  79. 	if( updateMethodMapItx == m_updateMethod.end() )
  80. 	{
  81. 		return NULL;
  82. 	}
  83.  
  84. 	return updateMethodMapItx->second;
  85. }
  86.  
  87. /////////////////////////////////////////////////////////////////////////////
  88.  
  89. int main()
  90. {
  91. 	Container c;
  92. 	c.update( "foo" );
  93. 	c.update( "bar" );
  94.  
  95. 	return EXIT_SUCCESS;
  96. }
  97.  
  98. //////////////////////////////////////////////////////////////////////
  99.  
Success #stdin #stdout 0.02s 2864KB
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Container::updateFoo() -> Foo::update()
Container::updateBar() -> Bar::update()
https://ideone.com/325jy
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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