/*
* CVS identifier:
*
* $Id: MsgLogger.java,v 1.7 2001/08/17 16:24:51 grosbois Exp $
*
* Class:                   MsgLogger
*
* Description:             Facility to log messages (abstract)
*
*
*
* COPYRIGHT:
* 
* This software module was originally developed by Raphaël Grosbois and
* Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
* Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
* Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
* Centre France S.A) in the course of development of the JPEG2000
* standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
* software module is an implementation of a part of the JPEG 2000
* Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
* Systems AB and Canon Research Centre France S.A (collectively JJ2000
* Partners) agree not to assert against ISO/IEC and users of the JPEG
* 2000 Standard (Users) any of their rights under the copyright, not
* including other intellectual property rights, for this software module
* with respect to the usage by ISO/IEC and Users of this software module
* or modifications thereof for use in hardware or software products
* claiming conformance to the JPEG 2000 Standard. Those intending to use
* this software module in hardware or software products are advised that
* their use may infringe existing patents. The original developers of
* this software module, JJ2000 Partners and ISO/IEC assume no liability
* for use of this software module or modifications thereof. No license
* or right to this software module is granted for non JPEG 2000 Standard
* conforming products. JJ2000 Partners have full right to use this
* software module for his/her own purpose, assign or donate this
* software module to any third party and to inhibit third parties from
* using this software module for non JPEG 2000 Standard conforming
* products. This copyright notice must be included in all copies or
* derivative works of this software module.
* 
* Copyright (c) 1999/2000 JJ2000 Partners.
* */
using System;
namespace CSJ2K.j2k.util
{
	
	/// <summary> This class provides a simple common abstraction of a facility that logs
	/// and/or displays messages or simple strings. The underlying facility can be
	/// a terminal, text file, text area in a GUI display, dialog boxes in a GUI
	/// display, etc., or a combination of those.
	/// 
	/// <>Messages are short strings (a couple of lines) that indicate some state
	/// of the program, and that have a severity code associated with them (see
	/// below). Simple strings is text (can be long) that has no severity code
	/// associated with it. Typical use of simple strings is to display help
	/// texts.</p>
	/// 
	/// <p>Each message has a severity code, which can be one of the following:
	/// LOG, INFO, WARNING, ERROR. Each implementation should treat each severity
	/// code in a way which corresponds to the type of diplay used.</p>
	/// 
	/// <p>Messages are printed via the 'printmsg()' method. Simple strings are
	/// printed via the 'print()', 'println()' and 'flush()' methods, each simple
	/// string is considered to be terminated once the 'flush()' method has been
	/// called. The 'printmsg()' method should never be called before a previous
	/// simple string has been terminated.</p>
	/// 
	/// </summary>
	public struct MsgLogger_Fields{
		/// <summary>Severity of message. LOG messages are just for bookkeeping and do not
		/// need to be displayed in the majority of cases 
		/// </summary>
		public const int LOG = 0;
		/// <summary>Severity of message. INFO messages should be displayed just for user
		/// feedback. 
		/// </summary>
		public const int INFO = 1;
		/// <summary>Severity of message. WARNING messages denote that an unexpected state
		/// has been reached and should be given as feedback to the user. 
		/// </summary>
		public const int WARNING = 2;
		/// <summary>Severity of message. ERROR messages denote that something has gone
		/// wrong and probably that execution has ended. They should be definetely
		/// displayed to the user. 
		/// </summary>
		public const int ERROR = 3;
	}
	public interface MsgLogger
	{
		//UPGRADE_NOTE: Members of interface 'MsgLogger' were extracted into structure 'MsgLogger_Fields'. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1045'"
		
		/// <summary> Prints the message 'msg' to the output device, appending a newline,
		/// with severity 'sev'. Some implementations where the appended newline is
		/// irrelevant may not append the newline. Depending on the implementation
		/// the severity of the message may be added to it. The message is
		/// reformatted as appropriate for the output devic, but any newline
		/// characters are respected.
		/// 
		/// </summary>
		/// <param name="sev">The message severity (LOG, INFO, etc.)
		/// 
		/// </param>
		/// <param name="msg">The message to display
		/// 
		/// </param>
		void  printmsg(int sev, System.String msg);
		
		/// <summary> Prints the string 'str' to the output device, appending a line
		/// return. The message is reformatted as appropriate to the particular
		/// diplaying device, where 'flind' and 'ind' are used as hints for
		/// performing that operation. However, any newlines appearing in 'str' are
		/// respected. The output device may not display the string until flush()
		/// is called. Some implementations may automatically flush when this
		/// method is called. This method just prints the string, the string does
		/// not make part of a "message" in the sense that no severity is
		/// associated to it.
		/// 
		/// </summary>
		/// <param name="str">The string to print
		/// 
		/// </param>
		/// <param name="flind">Indentation of the first line
		/// 
		/// </param>
		/// <param name="ind">Indentation of any other lines.
		/// 
		/// </param>
		void  println(System.String str, int flind, int ind);
		
		/// <summary> Writes any buffered data from the println() method to the device.
		/// 
		/// </summary>
		void  flush();
	}
}