Initial commit of ResInsight version 0.4.8

cafProjectDataModel/cafFactory.h

@@ -0,0 +1,110 @@
+//##################################################################################################
+//
+//   Custom Visualization Core library
+//   Copyright (C) 2011-2012 Ceetron AS
+//    
+//   This library is free software: you can redistribute it and/or modify 
+//   it under the terms of the GNU General Public License as published by 
+//   the Free Software Foundation, either version 3 of the License, or 
+//   (at your option) any later version. 
+//    
+//   This library is distributed in the hope that it will be useful, but WITHOUT ANY 
+//   WARRANTY; without even the implied warranty of MERCHANTABILITY or 
+//   FITNESS FOR A PARTICULAR PURPOSE.   
+//    
+//   See the GNU General Public License at <<http://www.gnu.org/licenses/gpl.html>> 
+//   for more details. 
+//
+//##################################################################################################
+
+#pragma once
+
+#include <assert.h>
+#include <map>
+
+namespace caf
+{
+
+    //==================================================================================================
+    /// A generic Factory class template
+    /// Usage:
+    ///     caf::Factory<BaseType, KeyType>::instance()->registerCreator<TypeToCreate>(key);
+    ///     BaseType* newObject = caf::Factory<BaseType, KeyType>::instance()->create(key);
+    //==================================================================================================
+
+    template<typename BaseType, typename KeyType>
+    class Factory
+    {
+    public:
+        static Factory<BaseType, KeyType> * instance()
+        {
+            static Factory<BaseType, KeyType>* fact = new Factory<BaseType, KeyType>;
+            return fact;
+        }
+
+        template< typename TypeToCreate >
+        void registerCreator(const KeyType& key)
+        {
+            std::map<KeyType, ObjectCreatorBase*>::iterator entryIt;
+
+            entryIt = m_factoryMap.find(key);
+            if (entryIt == m_factoryMap.end())
+            {
+                m_factoryMap[key] = new ObjectCreator<TypeToCreate>();
+                return true;
+            }
+            else
+            {
+                assert(key != entryIt->first); // classNameKeyword has already been used
+                assert(false); // To be sure ..
+            }
+        }
+
+        BaseType* create(const KeyType& key);
+        {
+            std::map<KeyType, ObjectCreatorBase*>::iterator entryIt;
+            entryIt = m_factoryMap.find(key);
+            if (entryIt != m_factoryMap.end())
+            {
+                return entryIt->second->create();
+            }
+            else
+            {
+                return NULL;
+            }
+        }
+
+    private:
+        Factory ()  {}
+        ~Factory() 
+        {
+            std::map<KeyType, ObjectCreatorBase*>::iterator entryIt;
+            for (entryIt = m_factoryMap.begin(); entryIt != m_factoryMap.end(); ++entryIt)
+            {
+                delete(entryIt->second);
+            }
+        }
+
+        // Internal helper classes
+
+        class ObjectCreatorBase
+        {
+        public:
+            ObjectCreatorBase()          {}
+            virtual ~ObjectCreatorBase() {}
+            virtual BaseType * create() = 0;
+        };
+
+        template< typename TypeToCreate >
+        class ObjectCreator : public ObjectCreatorBase
+        {
+        public:
+            virtual BaseType * create() { return new TypeToCreate(); }
+        };
+
+        // Map to store factory
+        std::map<KeyType, ObjectCreatorBase*> m_factoryMap;
+    };
+
+
+} //End of namespace caf