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+//
+// SessionFactory.h
+//
+// Library: Data
+// Package: DataCore
+// Module:  SessionFactory
+//
+// Definition of the SessionFactory class.
+//
+// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Data_SessionFactory_INCLUDED
+#define Data_SessionFactory_INCLUDED
+
+
+#include "Poco/Data/Data.h"
+#include "Poco/Data/Connector.h"
+#include "Poco/Data/Session.h"
+#include "Poco/Mutex.h"
+#include "Poco/SharedPtr.h"
+#include "Poco/String.h"
+#include <map>
+
+
+namespace Poco {
+namespace Data {
+
+
+class Data_API SessionFactory
+	/// A SessionFactory is a singleton class that stores Connectors and allows to 
+	/// create Sessions of the required type:
+	///    
+	///     Session ses(SessionFactory::instance().create(connector, connectionString));
+	///    
+	/// where the first param presents the type of session one wants to create (e.g. for SQLite one would choose "SQLite")
+	/// and the second param is the connection string that the connector requires to connect to the database.
+	///
+	/// A concrete example to open an SQLite database stored in the file "dummy.db" would be
+	///    
+	///     Session ses(SessionFactory::instance().create(SQLite::Connector::KEY, "dummy.db"));
+	///
+	/// An even simpler way to create a session is to use the two argument constructor of Session, which
+	/// automatically invokes the SessionFactory:
+	///
+	///      Session ses("SQLite", "dummy.db");
+{
+public:
+	
+	static SessionFactory& instance();
+		/// returns the static instance of the singleton.
+
+	void add(Connector* pIn);
+		/// Registers a Connector under its key at the factory. If a registration for that
+		/// key is already active, the first registration will be kept, only its reference count will be increased.
+		/// Always takes ownership of parameter pIn.
+
+	void remove(const std::string& key);
+		/// Lowers the reference count for the Connector registered under that key. If the count reaches zero,
+		/// the object is removed.
+
+	Session create(const std::string& key,
+		const std::string& connectionString,
+		std::size_t timeout = Session::LOGIN_TIMEOUT_DEFAULT);
+		/// Creates a Session for the given key with the connectionString. Throws an Poco:Data::UnknownDataBaseException
+		/// if no Connector is registered for that key.
+
+	Session create(const std::string& uri,
+		std::size_t timeout = Session::LOGIN_TIMEOUT_DEFAULT);
+		/// Creates a Session for the given URI (must be in key:///connectionString format). 
+		/// Throws a Poco:Data::UnknownDataBaseException if no Connector is registered for the key.
+
+private:
+	SessionFactory();
+	~SessionFactory();
+	SessionFactory(const SessionFactory&);
+	SessionFactory& operator = (const SessionFactory&);
+
+	struct SessionInfo
+	{
+		int cnt;
+		Poco::SharedPtr<Connector> ptrSI;
+		SessionInfo(Connector* pSI);
+	};
+	
+	typedef std::map<std::string, SessionInfo, Poco::CILess> Connectors;
+	Connectors      _connectors;
+	Poco::FastMutex _mutex;
+};
+
+
+} } // namespace Poco::Data
+
+
+#endif // Data_SessionFactory_INCLUDED