//
   //  ========================================================================
   //  Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
   //  ------------------------------------------------------------------------
   //  All rights reserved. This program and the accompanying materials
   //  are made available under the terms of the Eclipse Public License v1.0
   //  and Apache License v2.0 which accompanies this distribution.
   //
   //      The Eclipse Public License is available at
  //      http://www.eclipse.org/legal/epl-v10.html
  //
  //      The Apache License v2.0 is available at
  //      http://www.opensource.org/licenses/apache2.0.php
  //
  //  You may elect to redistribute this code under either of these licenses.
  //  ========================================================================
  //
  
  package org.eclipse.jetty.util.log;
  
  import java.util.logging.Level;
  
  /**
   * <p>
   * Implementation of Jetty {@link Logger} based on {@link java.util.logging.Logger}.
   * </p>
   *
   * <p>
   * You can also set the logger level using <a href="http://java.sun.com/j2se/1.5.0/docs/guide/logging/overview.html">
   * standard java.util.logging configuration</a>.
   * </p>
   */
  public class JavaUtilLog extends AbstractLogger
  {
      private Level configuredLevel;
      private java.util.logging.Logger _logger;
  
      public JavaUtilLog()
      {
          this("org.eclipse.jetty.util.log");
      }
  
      public JavaUtilLog(String name)
      {
          _logger = java.util.logging.Logger.getLogger(name);
          if (Boolean.parseBoolean(Log.__props.getProperty("org.eclipse.jetty.util.log.DEBUG", "false")))
          {
              _logger.setLevel(Level.FINE);
          }
          configuredLevel = _logger.getLevel();
      }
  
      public String getName()
      {
          return _logger.getName();
      }
  
      public void warn(String msg, Object... args)
      {
          if (_logger.isLoggable(Level.WARNING))
              _logger.log(Level.WARNING,format(msg,args));
      }
  
      public void warn(Throwable thrown)
      {
          warn("", thrown);
      }
  
      public void warn(String msg, Throwable thrown)
      {
          _logger.log(Level.WARNING, msg, thrown);
      }
  
      public void info(String msg, Object... args)
      {
          if (_logger.isLoggable(Level.INFO))
              _logger.log(Level.INFO, format(msg, args));
      }
  
      public void info(Throwable thrown)
      {
          info("", thrown);
      }
  
      public void info(String msg, Throwable thrown)
      {
          _logger.log(Level.INFO, msg, thrown);
      }
  
      public boolean isDebugEnabled()
      {
          return _logger.isLoggable(Level.FINE);
      }
  
      public void setDebugEnabled(boolean enabled)
      {
          if (enabled)
          {
              configuredLevel = _logger.getLevel();
             _logger.setLevel(Level.FINE);
         }
         else
         {
             _logger.setLevel(configuredLevel);
         }
     }
 
     public void debug(String msg, Object... args)
     {
         if (_logger.isLoggable(Level.FINE))
             _logger.log(Level.FINE,format(msg, args));
     }
 
     public void debug(Throwable thrown)
     {
         debug("", thrown);
     }
 
     public void debug(String msg, Throwable thrown)
     {
         _logger.log(Level.FINE, msg, thrown);
     }
 
     /**
      * Create a Child Logger of this Logger.
      */
     protected Logger newLogger(String fullname)
     {
         return new JavaUtilLog(fullname);
     }
 
     public void ignore(Throwable ignored)
     {
         if (Log.isIgnored())
         {
             warn(Log.IGNORED, ignored);
         }
     }
 
     private String format(String msg, Object... args)
     {
         msg = String.valueOf(msg); // Avoids NPE
         String braces = "{}";
         StringBuilder builder = new StringBuilder();
         int start = 0;
         for (Object arg : args)
         {
             int bracesIndex = msg.indexOf(braces, start);
             if (bracesIndex < 0)
             {
                 builder.append(msg.substring(start));
                 builder.append(" ");
                 builder.append(arg);
                 start = msg.length();
             }
             else
             {
                 builder.append(msg.substring(start, bracesIndex));
                 builder.append(String.valueOf(arg));
                 start = bracesIndex + braces.length();
             }
         }
         builder.append(msg.substring(start));
         return builder.toString();
     }
 }