1 /*========================================================================= 2 * 3 * Copyright Insight Software Consortium 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0.txt 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 *=========================================================================*/ 18 /*========================================================================= 19 * 20 * Portions of this file are subject to the VTK Toolkit Version 3 copyright. 21 * 22 * Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen 23 * 24 * For complete copyright, license and disclaimer of warranty information 25 * please refer to the NOTICE file at the top of the ITK source tree. 26 * 27 *=========================================================================*/ 28 #ifndef itkObjectFactory_h 29 #define itkObjectFactory_h 30 31 #include "itkObjectFactoryBase.h" 32 33 namespace itk 34 { 35 /** \class ObjectFactory 36 * \brief Create instances of a class. 37 * 38 * ObjectFactory is a helper class used to created instances of a 39 * class. Object factories are used for instantiation because they allow 40 * run-time replacement of a class with a user-supplied version. For 41 * example, if you wished to replace an algorithm with your own custom 42 * version, or with a hardware-accelerated version, ObjectFactory 43 * can be used to do this. 44 * 45 * This implementation of the object factory is templated and uses RTTI 46 * (Run-Time Type Information) to create the name of the class it is to 47 * instantiate. (The name may include template type parameters, depending 48 * on the class definition.) 49 * 50 * \ingroup ITKSystemObjects 51 * \ingroup ITKCommon 52 */ 53 54 template< typename T > 55 class ObjectFactory:public ObjectFactoryBase 56 { 57 public: Create()58 static typename T::Pointer Create() 59 { 60 LightObject::Pointer ret = CreateInstance( typeid( T ).name() ); 61 62 return dynamic_cast< T * >( ret.GetPointer() ); 63 } 64 }; 65 } // end namespace itk 66 67 #endif 68