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Kohana final class

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  1. public static function auto_load($class)
  2. 	{
  3. 		if (class_exists($class, FALSE))
  4. 			return TRUE;
  5.  
  6. 		if (($suffix = strrpos($class, '_')) > 0)
  7. 		{
  8. 			// Find the class suffix
  9. 			$suffix = substr($class, $suffix + 1);
  10. 		}
  11. 		else
  12. 		{
  13. 			// No suffix
  14. 			$suffix = FALSE;
  15. 		}
  16.  
  17. 		if ($suffix === 'Core')
  18. 		{
  19. 			$type = 'libraries';
  20. 			$file = substr($class, 0, -5);
  21. 		}
  22. 		elseif ($suffix === 'Controller')
  23. 		{
  24. 			$type = 'controllers';
  25. 			// Lowercase filename
  26. 			$file = strtolower(substr($class, 0, -11));
  27. 		}
  28. 		elseif ($suffix === 'Model')
  29. 		{
  30. 			$type = 'models';
  31. 			// Lowercase filename
  32. 			$file = strtolower(substr($class, 0, -6));
  33. 		}
  34. 		elseif ($suffix === 'Driver')
  35. 		{
  36. 			$type = 'libraries/drivers';
  37. 			$file = str_replace('_', '/', substr($class, 0, -7));
  38. 		}
  39. 		else
  40. 		{
  41. 			// This could be either a library or a helper, but libraries must
  42. 			// always be capitalized, so we check if the first character is
  43. 			// uppercase. If it is, we are loading a library, not a helper.
  44. 			$type = ($class[0] < 'a') ? 'libraries' : 'helpers';
  45. 			$file = $class;
  46. 		}
  47.  
  48. 		if ($filename = self::find_file($type, $file))
  49. 		{
  50. 			// Load the class
  51. 			require $filename;
  52. 		}
  53. 		elseif ($type == 'controllers' && $filename = self::find_file($type, Router::$segments[0].'/'.$file))
  54. 		{
  55. 			// Load the class from a controllers subfolder
  56. 			require $filename;
  57. 		}
  58. 		else
  59. 		{
  60. 			// The class could not be found
  61. 			return FALSE;
  62. 		}
  63.  
  64. 		if ($filename = self::find_file($type, self::$configuration['core']['extension_prefix'].$class))
  65. 		{
  66. 			// Load the class extension
  67. 			require $filename;
  68. 		}
  69. 		elseif ($suffix !== 'Core' AND class_exists($class.'_Core', FALSE))
  70. 		{
  71. 			// Class extension to be evaluated
  72. 			$extension = 'class '.$class.' extends '.$class.'_Core { }';
  73.  
  74. 			// Start class analysis
  75. 			$core = new ReflectionClass($class.'_Core');
  76.  
  77. 			if ($core->isAbstract())
  78. 			{
  79. 				// Make the extension abstract
  80. 				$extension = 'abstract '.$extension;
  81. 			}
  82.  
  83. 			// Transparent class extensions are handled using eval. This is
  84. 			// a disgusting hack, but it gets the job done.
  85. 			eval($extension);
  86. 		}
  87.  
  88. 		return TRUE;
  89. 	}

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