poco/Foundation/include/Poco/Formatter.h

//
// Formatter.h
//
// $Id: //poco/svn/Foundation/include/Poco/Formatter.h#2 $
//
// Library: Foundation
// Package: Logging
// Module:  Formatter
//
// Definition of the Formatter class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#ifndef Foundation_Formatter_INCLUDED
#define Foundation_Formatter_INCLUDED


#include "Poco/Foundation.h"
#include "Poco/Configurable.h"
#include "Poco/RefCountedObject.h"


namespace Poco {


class Message;


class Foundation_API Formatter: public Configurable, public RefCountedObject
	/// The base class for all Formatter classes.
	///
	/// A formatter basically takes a Message object
	/// and formats it into a string. How the formatting
	/// is exactly done is up to the implementation of
	/// Formatter. For example, a very simple implementation
	/// might simply take the message's Text (see Message::getText()).
	/// A useful implementation should at least take the Message's
	/// Time, Priority and Text fields and put them into a string.
	///
	/// The Formatter class supports the Configurable
	/// interface, so the behaviour of certain formatters
	/// is configurable.
	/// 
	/// Trivial implementations of of getProperty() and 
	/// setProperty() are provided.
	///
	/// Subclasses must at least provide a format() method.
{
public:
	Formatter();
		/// Creates the formatter.
		
	virtual ~Formatter();
		/// Destroys the formatter.

	virtual void format(const Message& msg, std::string& text) = 0;
		/// Formats the message and places the result in text. 
		/// Subclasses must override this method.
		
	void setProperty(const std::string& name, const std::string& value);
		/// Throws a PropertyNotSupportedException.

	std::string getProperty(const std::string& name) const;
		/// Throws a PropertyNotSupportedException.
};


} // namespace Poco


#endif // Foundation_Formatter_INCLUDED