content: package com.japisoft.framework.toolkit;
  
  import java.util.ArrayList;
  
  /**
  This program is available under two licenses : 
  
  1. For non commercial usage : 
  
  This program 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.
  
  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
  
  2. For commercial usage :
  
  You need to get a commercial license for source usage at : 
  
  http://www.editix.com/buy.html
  
  Copyright (c) 2018 Alexandre Brillant - JAPISOFT SARL - http://www.japisoft.com
  
  @author Alexandre Brillant - abrillant@japisoft.com
  @author JAPISOFT SARL - http://www.japisoft.com
  
  */
  public class Logger {	
  	public static final int INFO = 0;
  	public static final int WARNING = 1;
  	public static final int ERROR = 2;
  
  	private static Logger DELEGATE = null;
  	private static ArrayList LISTENERS = null;
  
  	public static void addLoggerListener( LoggerListener listener ) {
  		if ( LISTENERS == null )
  			LISTENERS = new ArrayList();
  		LISTENERS.add( listener );
  	}
  
  	public static void removeLoggerListener( LoggerListener listener ) {
  		if ( LISTENERS != null )
  			LISTENERS.remove( listener );
  	}
  
  	public static void setDefaultLogger( Logger logger ) {
  		DELEGATE = logger;
  	}
  
  	public String log( int level, String message ) {
  		return DELEGATE.log( level, message );		
  	}
  
  	public static String addMessage( int level, String message ) {
  		if ( DELEGATE == null )
  			DELEGATE = new ConsoleLogger();
  		return DELEGATE.log( level, message );
  	}
  
  	public static void addInfo( String message ) {
  		message = addMessage( INFO, message );
  		if ( LISTENERS != null ) {
  			for ( int i = 0; i < LISTENERS.size(); i++ ) {
  				( ( LoggerListener )LISTENERS.get( i ) ).addInfo( message );
  			}
  		}
  	}
  	
  	public static void addWarning( String message ) {
  		message = addMessage( WARNING, message );
  		if ( LISTENERS != null ) {
  			for ( int i = 0; i < LISTENERS.size(); i++ ) {
  				( ( LoggerListener )LISTENERS.get( i ) ).addWarning( message );
  			}
  		}				
  	}
  
  	public static void addError( String message ) {
  		message = addMessage( ERROR, message );
  		if ( LISTENERS != null ) {
  			for ( int i = 0; i < LISTENERS.size(); i++ ) {
  				( ( LoggerListener )LISTENERS.get( i ) ).addError( message );
  			}
  		}		
  	}
  
  }
  