Fawkes API Fawkes Development Version
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00001 00002 /*************************************************************************** 00003 * factory.h - Camera factory 00004 * 00005 * Created: Wed Apr 11 14:40:22 2007 00006 * Copyright 2005-2007 Tim Niemueller [www.niemueller.de] 00007 * 00008 ****************************************************************************/ 00009 00010 /* This program is free software; you can redistribute it and/or modify 00011 * it under the terms of the GNU General Public License as published by 00012 * the Free Software Foundation; either version 2 of the License, or 00013 * (at your option) any later version. A runtime exception applies to 00014 * this software (see LICENSE.GPL_WRE file mentioned below for details). 00015 * 00016 * This program is distributed in the hope that it will be useful, 00017 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00018 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00019 * GNU Library General Public License for more details. 00020 * 00021 * Read the full text in the LICENSE.GPL_WRE file in the doc directory. 00022 */ 00023 00024 #ifndef __FIREVISION_CAMS_FACTORY_H_ 00025 #define __FIREVISION_CAMS_FACTORY_H_ 00026 00027 #include <core/exception.h> 00028 #include <core/exceptions/software.h> 00029 00030 #include <cams/camera.h> 00031 #include <cams/cam_exceptions.h> 00032 00033 #include <cstddef> 00034 00035 namespace firevision { 00036 #if 0 /* just to make Emacs auto-indent happy */ 00037 } 00038 #endif 00039 00040 class CameraArgumentParser; 00041 00042 class CameraFactory 00043 { 00044 public: 00045 static Camera * instance(const char *as); 00046 static Camera * instance(const CameraArgumentParser *cap); 00047 00048 /** Get typed instance of camera. 00049 * Creates a new instance and converts it to the requested type. If the type 00050 * does not match the requested camera an exception is thrown. 00051 * @param as camera argument string 00052 * @return typed camera instance 00053 * @exception TypeMismatchException thrown, if requested camera does not match 00054 * requested type. 00055 */ 00056 template <class C> 00057 static C* instance(const char *as); 00058 }; 00059 00060 00061 template <class C> 00062 C * 00063 CameraFactory::instance(const char *as) 00064 { 00065 Camera *c = CameraFactory::instance(as); 00066 C *tc = dynamic_cast<C *>(c); 00067 if ( tc == NULL ) { 00068 throw fawkes::TypeMismatchException(); 00069 } 00070 return tc; 00071 } 00072 00073 } // end namespace firevision 00074 00075 #endif