ENH: Add superclass for all commands and handlers. Improve handlers to have initialization code, and start initializing ctest when start is invoked

Source/cmObject.h

@@ -0,0 +1,56 @@
+/*=========================================================================
+
+  Program:   CMake - Cross-Platform Makefile Generator
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+  Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
+  See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
+
+     This software is distributed WITHOUT ANY WARRANTY; without even 
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
+     PURPOSE.  See the above copyright notices for more information.
+
+=========================================================================*/
+#ifndef cmObject_h
+#define cmObject_h
+
+#include "cmStandardIncludes.h"
+
+/** \class cmObject
+ * \brief Superclass for all commands and other classes in CMake.
+ *
+ * cmObject is the base class for all classes in CMake. It defines some methods
+ * such as GetNameOfClass, IsA, SafeDownCast.
+ */
+class cmObject
+{
+public:
+  /**
+   * Need virtual destructor to destroy real command type.
+   */
+  virtual ~cmObject() {}
+  
+  /**
+   * The class name of the command.
+   */
+  virtual const char* GetNameOfClass() = 0;
+
+  /**
+   * Returns true if this class is the given class, or a subclass of it.
+   */
+  static bool IsTypeOf(const char *type)
+    { return !strcmp("cmObject", type); }
+  
+  /**
+   * Returns true if this object is an instance of the given class or
+   * a subclass of it.
+   */
+  virtual bool IsA(const char *type)
+    { return cmObject::IsTypeOf(type); }
+};
+
+#endif
+