ClickHouse/base/poco/Foundation/include/Poco/Formatter.h

//
// Formatter.h
//
// Library: Foundation
// Package: Logging
// Module:  Formatter
//
// Definition of the Formatter class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Foundation_Formatter_INCLUDED
#define Foundation_Formatter_INCLUDED


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