text: 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 java.io.PrintStream;
  
  import static org.apache.maven.shared.utils.logging.MessageUtils.buffer;
  import static org.apache.maven.shared.utils.logging.MessageUtils.level;
  
  /**
   * 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 level().debug( "TRACE" );
              case LOG_LEVEL_DEBUG:
                  return level().debug( "DEBUG" );
              case LOG_LEVEL_INFO:
                  return level().info( "INFO" );
              case LOG_LEVEL_WARN:
                  return level().warning( "WARNING" );
              case LOG_LEVEL_ERROR:
              default:
                  return level().error( "ERROR" );
          }
      }
  
      @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();
          }
      }
  }
  