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PatternFormatter.h

//
// PatternFormatter.h
//
// $Id: //poco/1.3/Foundation/include/Poco/PatternFormatter.h#3 $
//
// Library: Foundation
// Package: Logging
// Module:  PatternFormatter
//
// Definition of the PatternFormatter 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_PatternFormatter_INCLUDED
#define Foundation_PatternFormatter_INCLUDED


#include "Poco/Foundation.h"
#include "Poco/Formatter.h"
#include "Poco/Message.h"


namespace Poco {


00051 class Foundation_API PatternFormatter: public Formatter
      /// This Formatter allows for custom formatting of
      /// log messages based on format patterns.
      ///
      /// The format pattern is used as a template to format the message and
      /// is copied character by character except for the following special characters,
      /// which are replaced by the corresponding value.
      ///
      ///   * %s - message source
      ///   * %t - message text
      ///   * %l - message priority level (1 .. 7)
      ///   * %p - message priority (Fatal, Critical, Error, Warning, Notice, Information, Debug, Trace)
      ///   * %q - abbreviated message priority (F, C, E, W,N, I, D, T)
      ///   * %P - message process identifier
      ///   * %T - message thread name
      ///   * %I - message thread identifier (numeric)
      ///   * %N - node or host name
      ///   * %w - message date/time abbreviated weekday (Mon, Tue, ...)
      ///   * %W - message date/time full weekday (Monday, Tuesday, ...)
      ///   * %b - message date/time abbreviated month (Jan, Feb, ...)
      ///   * %B - message date/time full month (January, February, ...)
      ///   * %d - message date/time zero-padded day of month (01 .. 31)
      ///   * %e - message date/time day of month (1 .. 31)
      ///   * %f - message date/time space-padded day of month ( 1 .. 31)
      ///   * %m - message date/time zero-padded month (01 .. 12)
      ///   * %n - message date/time month (1 .. 12)
      ///   * %o - message date/time space-padded month ( 1 .. 12)
      ///   * %y - message date/time year without century (70)
      ///   * %Y - message date/time year with century (1970)
      ///   * %H - message date/time hour (00 .. 23)
      ///   * %h - message date/time hour (00 .. 12)
      ///   * %a - message date/time am/pm
      ///   * %A - message date/time AM/PM
      ///   * %M - message date/time minute (00 .. 59)
      ///   * %S - message date/time second (00 .. 59)
      ///   * %i - message date/time millisecond (000 .. 999)
      ///   * %c - message date/time centisecond (0 .. 9)
      ///   * %F - message date/time fractional seconds/microseconds (000000 - 999999)
      ///   * %z - time zone differential in ISO 8601 format (Z or +NN.NN).
      ///   * %Z - time zone differential in RFC format (GMT or +NNNN)
      ///   * %[name] - the value of the message parameter with the given name
      ///   * %% - percent sign

{
public:
      PatternFormatter();
            /// Creates a PatternFormatter.
            /// The format pattern must be specified with
            /// a call to setProperty.

      PatternFormatter(const std::string& format);
            /// Creates a PatternFormatter that uses the
            /// given format pattern.

      ~PatternFormatter();
            /// Destroys the PatternFormatter.

      void format(const Message& msg, std::string& text);
            /// Formats the message according to the specified
            /// format pattern and places the result in text. 
            
      void setProperty(const std::string& name, const std::string& value);
            /// Sets the property with the given name to the given value.
            ///
            /// The following properties are supported:
            /// 
            ///     * pattern: The format pattern. See the PatternFormatter class
            ///       for details.
            ///     * times: Specifies whether times are adjusted for local time
            ///       or taken as they are in UTC. Supported values are "local" and "UTC".
            ///
            /// If any other property name is given, a PropertyNotSupported
            /// exception is thrown.

      std::string getProperty(const std::string& name) const;
            /// Returns the value of the property with the given name or
            /// throws a PropertyNotSupported exception if the given
            /// name is not recognized.

00130       static const std::string PROP_PATTERN;
      static const std::string PROP_TIMES;

protected:
      static const std::string& getPriorityName(int);
            /// Returns a string for the given priority value.
      
      static void fmt(std::string& str, int value);
      static void fmt(std::string& str, int value, int width);
      static void fmt0(std::string& str, int value, int width);
      
private:
      bool        _localTime;
      std::string _pattern;
};


} // namespace Poco


#endif // Foundation_PatternFormatter_INCLUDED

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