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+/*
+ Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
+
+ This program 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; version 2 of the License.
+
+ This program 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 for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ MA 02110-1301 USA.
+*/
+
+/* The factory header defines an Object Factory, used by SSL message and
+ * handshake types.
+ *
+ * See Desgin Pattern in GoF and Alexandrescu's chapter in Modern C++ Design,
+ * page 208
+ */
+
+
+
+#ifndef yaSSL_FACTORY_HPP
+#define yaSSL_FACTORY_HPP
+
+#include STL_VECTOR_FILE
+#include STL_PAIR_FILE
+
+
+namespace STL = STL_NAMESPACE;
+
+
+
+
+
+namespace yaSSL {
+
+
+// Factory uses its callback map to create objects by id,
+// returning an abstract base pointer
+template<class AbstractProduct,
+ typename IdentifierType = int,
+ typename ProductCreator = AbstractProduct* (*)()
+ >
+class Factory {
+ typedef STL::pair<IdentifierType, ProductCreator> CallBack;
+ typedef STL::vector<CallBack> CallBackVector;
+
+ CallBackVector callbacks_;
+public:
+ // pass function pointer to register all callbacks upon creation
+ explicit Factory(void (*init)(Factory<AbstractProduct, IdentifierType,
+ ProductCreator>&))
+ {
+ init(*this);
+ }
+
+ // reserve place in vector before registering, used by init funcion
+ void Reserve(size_t sz)
+ {
+ callbacks_.reserve(sz);
+ }
+
+ // register callback
+ void Register(const IdentifierType& id, ProductCreator pc)
+ {
+ callbacks_.push_back(STL::make_pair(id, pc));
+ }
+
+ // THE Creator, returns a new object of the proper type or 0
+ AbstractProduct* CreateObject(const IdentifierType& id) const
+ {
+ typedef typename STL::vector<CallBack>::const_iterator cIter;
+
+ cIter first = callbacks_.begin();
+ cIter last = callbacks_.end();
+
+ while (first != last) {
+ if (first->first == id)
+ break;
+ ++first;
+ }
+
+ if (first == callbacks_.end())
+ return 0;
+ return (first->second)();
+ }
+private:
+ Factory(const Factory&); // hide copy
+ Factory& operator=(const Factory&); // and assign
+};
+
+
+} // naemspace
+
+#endif // yaSSL_FACTORY_HPP