package org.slf4j.impl;
   
   /*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  
  import static org.apache.maven.shared.utils.logging.MessageUtils.buffer;
  
  import java.io.PrintStream;
  
  /**
   * Logger for Maven, that support colorization of levels and stacktraces.
   * This class implements 2 methods introduced in slf4j-simple provider local copy.
   * @since 3.5.0
   */
  public class MavenSimpleLogger
      extends SimpleLogger
  {
      MavenSimpleLogger( String name )
      {
          super( name );
      }
  
      @Override
      protected String renderLevel( int level )
      {
          switch ( level )
          {
              case LOG_LEVEL_TRACE:
                  return buffer().debug( "TRACE" ).toString();
              case LOG_LEVEL_DEBUG:
                  return buffer().debug( "DEBUG" ).toString();
              case LOG_LEVEL_INFO:
                  return buffer().info( "INFO" ).toString();
              case LOG_LEVEL_WARN:
                  return buffer().warning( "WARNING" ).toString();
              case LOG_LEVEL_ERROR:
              default:
                  return buffer().error( "ERROR" ).toString();
          }
      }
  
      @Override
      protected void writeThrowable( Throwable t, PrintStream stream )
      {
          if ( t == null )
          {
              return;
          }
          stream.print( buffer().failure( t.getClass().getName() ) );
          if ( t.getMessage() != null )
          {
              stream.print( ": " );
              stream.print( buffer().failure( t.getMessage() ) );
          }
          stream.println();
  
          while ( t != null )
          {
              for ( StackTraceElement e : t.getStackTrace() )
              {
                  stream.print( "    " );
                  stream.print( buffer().strong( "at" ) );
                  stream.print( " " + e.getClassName() + "." + e.getMethodName() );
                  stream.print( buffer().a( " (" ).strong( getLocation( e ) ).a( ")" ) );
                  stream.println();
              }
  
              t = t.getCause();
              if ( t != null )
              {
                  stream.print( buffer().strong( "Caused by" ).a( ": " ).a( t.getClass().getName() ) );
                  if ( t.getMessage() != null )
                  {
                      stream.print( ": " );
                      stream.print( buffer().failure( t.getMessage() ) );
                  }
                  stream.println();
              }
          }
      }
  
      protected String getLocation( final StackTraceElement e )
      {
         assert e != null;
 
         if ( e.isNativeMethod() )
         {
             return "Native Method";
         }
         else if ( e.getFileName() == null )
         {
             return "Unknown Source";
         }
         else if ( e.getLineNumber() >= 0 )
         {
             return String.format( "%s:%s", e.getFileName(), e.getLineNumber() );
         }
         else
         {
             return e.getFileName();
         }
     }
 }