// ========================================================================
   // Copyright (c) Webtide LLC
   // ------------------------------------------------------------------------
   // 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.apache.org/licenses/LICENSE-2.0.txt
  //
  // 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>
   * Honors the standard jetty system property <code>"org.eclipse.jetty.util.log.DEBUG"</code> to set logger into debug
   * mode (defaults to false, set to "true" to enable)
   * </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> against the name <code>"org.eclipse.jetty.util.log"</code>.
   * </p>
   */
  public class JavaUtilLog implements Logger
  {
      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.getBoolean("org.eclipse.jetty.util.log.DEBUG"))
              _logger.setLevel(Level.FINE);
      }
  
      public String getName()
      {
          return _logger.getName();
      }
  
      public void warn(String msg, Object... args)
      {
          _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)
      {
          _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)
      {
          _logger.setLevel(Level.FINE);
      }
  
      public void debug(String msg, Object... args)
      {
          _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);
     }
 
     public Logger getLogger(String name)
     {
         return new JavaUtilLog(name);
     }
 
     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();
     }
 }