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 org.apache.maven.logwrapper.LogLevelRecorder;
  import org.apache.maven.logwrapper.MavenSlf4jWrapperFactory;
  import org.slf4j.Logger;
  
  import java.util.Optional;
  
  /**
   * LogFactory for Maven which can create a simple logger or one which, if set, fails the build on a severity threshold.
   */
  public class MavenLoggerFactory extends SimpleLoggerFactory implements MavenSlf4jWrapperFactory
  {
      private LogLevelRecorder logLevelRecorder = null;
  
      @Override
      public void setLogLevelRecorder( LogLevelRecorder logLevelRecorder )
      {
          if ( this.logLevelRecorder != null )
          {
              throw new IllegalStateException( "LogLevelRecorder has already been set." );
          }
  
          this.logLevelRecorder = logLevelRecorder;
      }
  
      @Override
      public Optional<LogLevelRecorder> getLogLevelRecorder()
      {
          return Optional.ofNullable( logLevelRecorder );
      }
  
      /**
       * Return an appropriate {@link MavenSimpleLogger} instance by name.
       */
      @Override
      public Logger getLogger( String name )
      {
          Logger simpleLogger = loggerMap.get( name );
          if ( simpleLogger != null )
          {
              return simpleLogger;
          }
          else
          {
              Logger newInstance = getNewLoggingInstance( name );
              Logger oldInstance = loggerMap.putIfAbsent( name, newInstance );
              return oldInstance == null ? newInstance : oldInstance;
          }
      }
  
      private Logger getNewLoggingInstance( String name )
      {
          if ( logLevelRecorder == null )
          {
              return new MavenSimpleLogger( name );
          }
          else
          {
              return new MavenFailOnSeverityLogger( name, logLevelRecorder );
          }
      }
  }