Update to 2.0.0 tree from current Fremantle build

[opencv] / 3rdparty / flann / util / object_factory.h

diff --git a/3rdparty/flann/util/object_factory.h b/3rdparty/flann/util/object_factory.h
new file mode 100644 (file)
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+++ b/3rdparty/flann/util/object_factory.h
@@ -0,0 +1,93 @@
+/***********************************************************************
+ * Software License Agreement (BSD License)
+ *
+ * Copyright 2008-2009  Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
+ * Copyright 2008-2009  David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
+ *
+ * THE BSD LICENSE
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *************************************************************************/
+
+#ifndef OBJECT_FACTORY_H_
+#define OBJECT_FACTORY_H_
+
+#include <map>
+
+namespace flann
+{
+
+template<typename BaseClass, typename DerivedClass>
+BaseClass* createObject()
+{
+       return new DerivedClass();
+}
+
+template<typename BaseClass, typename UniqueIdType>
+class ObjectFactory
+{
+       typedef BaseClass* (*CreateObjectFunc)();
+       std::map<UniqueIdType, CreateObjectFunc> object_registry;
+
+       // singleton class, private constructor
+       ObjectFactory() {};
+
+public:
+   typedef typename std::map<UniqueIdType, CreateObjectFunc>::iterator Iterator;
+
+
+   template<typename DerivedClass>
+   bool register_(UniqueIdType id)
+   {
+      if (object_registry.find(id) != object_registry.end())
+               return false;
+
+      object_registry[id] = &createObject<BaseClass, DerivedClass>;
+      return true;
+   }
+
+   bool unregister(UniqueIdType id)
+   {
+      return (object_registry.erase(id) == 1);
+   }
+
+   BaseClass* create(UniqueIdType id)
+   {
+      Iterator iter = object_registry.find(id);
+
+      if (iter == object_registry.end())
+         return NULL;
+
+      return ((*iter).second)();
+   }
+
+   static ObjectFactory<BaseClass,UniqueIdType>& instance()
+   {
+          static ObjectFactory<BaseClass,UniqueIdType> the_factory;
+          return the_factory;
+   }
+
+};
+
+}
+
+#endif /* OBJECT_FACTORY_H_ */