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+//
+// FilesystemConfiguration.h
+//
+// Library: Util
+// Package: Configuration
+// Module:  FilesystemConfiguration
+//
+// Definition of the FilesystemConfiguration class.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Util_FilesystemConfiguration_INCLUDED
+#define Util_FilesystemConfiguration_INCLUDED
+
+
+#include "Poco/Util/Util.h"
+#include "Poco/Util/AbstractConfiguration.h"
+#include "Poco/Path.h"
+
+
+namespace Poco {
+namespace Util {
+
+
+class Util_API FilesystemConfiguration: public AbstractConfiguration
+	/// An implementation of AbstractConfiguration that stores configuration data
+	/// in a directory hierarchy in the filesystem.
+	///
+	/// Every period-separated part of a property name is represented
+	/// as a directory in the filesystem, relative to the base directory.
+	/// Values are stored in files named "data".
+	///
+	/// All changes to properties are immediately persisted in the filesystem.
+	///
+	/// For example, a configuration consisting of the properties
+	/// 
+	///   logging.loggers.root.channel.class = ConsoleChannel
+	///   logging.loggers.app.name = Application
+	///   logging.loggers.app.channel = c1
+	///   logging.formatters.f1.class = PatternFormatter
+	///   logging.formatters.f1.pattern = [%p] %t
+	///
+	/// is stored in the filesystem as follows:
+	///
+	///   logging/
+	///           loggers/
+	///                   root/
+	///                        channel/
+	///                                class/
+	///                                      data ("ConsoleChannel")
+	///                   app/
+	///                       name/
+	///                            data ("Application")
+	///                       channel/
+	///                               data ("c1")
+	///           formatters/
+	///                      f1/
+	///                         class/
+	///                               data ("PatternFormatter")
+	///                         pattern/
+	///                                 data ("[%p] %t")                      
+{
+public:
+	FilesystemConfiguration(const std::string& path);
+		/// Creates a FilesystemConfiguration using the given path.
+		/// All directories are created as necessary.
+
+	void clear();
+		/// Clears the configuration by erasing the configuration
+		/// directory and all its subdirectories and files.
+
+protected:
+	bool getRaw(const std::string& key, std::string& value) const;
+	void setRaw(const std::string& key, const std::string& value);
+	void enumerate(const std::string& key, Keys& range) const;
+	void removeRaw(const std::string& key);
+	Poco::Path keyToPath(const std::string& key) const;
+	~FilesystemConfiguration();
+
+private:
+	Poco::Path _path;
+};
+
+
+} } // namespace Poco::Util
+
+
+#endif // Util_FilesystemConfiguration_INCLUDED