/*
 * Copyright (C) The MX4J Contributors.
 * All rights reserved.
 *
 * This software is distributed under the terms of the MX4J License version 1.0.
 * See the terms of the MX4J License in the documentation provided with this software.
 */

package mx4j.log;

/**
 * Base class for logging objects.
 *
 * @version $Revision: 1.5 $
 */
public class Logger
{
   public static final int TRACE = 0;
   public static final int DEBUG = TRACE + 10;
   public static final int INFO = DEBUG + 10;
   public static final int WARN = INFO + 10;
   public static final int ERROR = WARN + 10;
   public static final int FATAL = ERROR + 10;

   private int m_priority = WARN;
   private String m_category;

   protected Logger()
   {
   }

   public void setPriority(int priority)
   {
      m_priority = priority;
   }

   public int getPriority()
   {
      return m_priority;
   }

   public String getCategory()
   {
      return m_category;
   }

   protected void setCategory(String category)
   {
      m_category = category;
   }

   public final boolean isEnabledFor(int priority)
   {
      return priority >= getPriority();
   }

   public final void fatal(Object message)
   {
      log(FATAL, message, null);
   }

   public final void fatal(Object message, Throwable t)
   {
      log(FATAL, message, t);
   }

   public final void error(Object message)
   {
      log(ERROR, message, null);
   }

   public final void error(Object message, Throwable t)
   {
      log(ERROR, message, t);
   }

   public final void warn(Object message)
   {
      log(WARN, message, null);
   }

   public final void warn(Object message, Throwable t)
   {
      log(WARN, message, t);
   }

   public final void info(Object message)
   {
      log(INFO, message, null);
   }

   public final void info(Object message, Throwable t)
   {
      log(INFO, message, t);
   }

   public final void debug(Object message)
   {
      log(DEBUG, message, null);
   }

   public final void debug(Object message, Throwable t)
   {
      log(DEBUG, message, t);
   }

   public final void trace(Object message)
   {
      log(TRACE, message, null);
   }

   public final void trace(Object message, Throwable t)
   {
      log(TRACE, message, t);
   }

   protected void log(int priority, Object message, Throwable t)
   {
      if (isEnabledFor(priority))
      {
         System.out.println(message);
         if (t != null)
         {
            t.printStackTrace(System.out);
         }
      }
   }
}