Message.h

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/************************************************************************
 *
 * Copyright (C) 2009-2011 Cassio Neri Moreira
 *
 * This file is part of the KeyValue library.
 *
 * The KeyValue library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 *
 * The KeyValue library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with KeyValue. If not, see <http://www.gnu.org/licenses/>.
 *
 * If you modify this library, or any covered work, by linking or combining
 * it with Excel (or a modified version of that program), containing parts
 * covered by the terms of End-User License Agreement for Microsoft
 * Software, the licensors of KeyValue grant you additional permission to
 * convey the resulting work.
 *
 **************************************************************************/

#ifndef KEYVALUE_SYS_MESSAGE_H_
#define KEYVALUE_SYS_MESSAGE_H_

#include <iosfwd>
#include <sstream>

#include "keyvalue/extern/String.h"
#include "keyvalue/sys/logger/ConsoleColours.h"

namespace keyvalue {

class Message {

public:

  virtual
  ~Message();

  unsigned int
  getLevel() const;

  string
  getString() const;

  virtual const string&
  getPrefix() const = 0;

  virtual logger::Colour
  getColour() const = 0;

  template <typename DataType>
  Message&
  operator&(const DataType& data);

protected:

  explicit
  Message(unsigned int level);

  Message(const Message& orig);

  struct Traits_ {
    string         prefix_;
    logger::Colour colour_;
  };

  static const Traits_ traits_[];

private:

  unsigned int                 level_;
  mutable ::std::ostringstream buf_;

  // Non assignable.
  Message&
  operator=(const Message& orig);

}; // class Message

  ::std::ostream&
  operator<<(::std::ostream& os, const Message& message);

/*--------------------------------------------------------------------------
 * operator&()
 *------------------------------------------------------------------------*/

template <typename DataType>
Message&
Message::operator&(const DataType& data) {
  buf_ << data;
  return *this;
}

} // namespace keyvalue

#endif // KEYVALUE_SYS_MESSAGE_H_