/*
    * 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.
   */
  
  package org.apache.logging.log4j.jul;
  
  import java.util.logging.Filter;
  import java.util.logging.Level;
  import java.util.logging.LogRecord;
  import java.util.logging.Logger;
  
  import org.apache.logging.log4j.message.Message;
  import org.apache.logging.log4j.spi.ExtendedLogger;
  
  /**
   * Log4j API implementation of the JUL {@link Logger} class. <strong>Note that this implementation does
   * <em>not</em> use the {@link java.util.logging.Handler} class.</strong> Instead, logging is delegated to the
   * underlying Log4j {@link org.apache.logging.log4j.Logger} which may be implemented in one of many different ways.
   * Consult the documentation for your Log4j Provider for more details.
   * <p>Note that the methods {@link #getParent()} and {@link #setLevel(java.util.logging.Level)} are not supported by
   * this implementation. If you need support for these methods, then you'll need to use log4j-core. The
   * {@link #getParent()} method will not fail (thanks to JUL API limitations), but it won't necessarily be
   * accurate!</p>
   * <p>Also note that {@link #setParent(java.util.logging.Logger)} is explicitly unsupported. Parent loggers are
   * determined using the syntax of the logger name; not through an arbitrary graph of loggers.</p>
   * 
   * @since 2.1
   */
  public class ApiLogger extends Logger {
  
      private final WrappedLogger logger;
      private static final String FQCN = ApiLogger.class.getName();
  
      ApiLogger(final ExtendedLogger logger) {
          super(logger.getName(), null);
          super.setLevel(LevelTranslator.toJavaLevel(logger.getLevel()));
          this.logger = new WrappedLogger(logger);
      }
  
      @Override
      public void log(final LogRecord record) {
          if (isFiltered(record)) {
              return;
          }
          final org.apache.logging.log4j.Level level = LevelTranslator.toLevel(record.getLevel());
          final Message message = logger.getMessageFactory().newMessage(record.getMessage(), record.getParameters());
          final Throwable thrown = record.getThrown();
          logger.logIfEnabled(FQCN, level, null, message, thrown);
      }
  
      // support for Logger.getFilter()/Logger.setFilter()
      boolean isFiltered(final LogRecord logRecord) {
          final Filter filter = getFilter();
          return filter != null && !filter.isLoggable(logRecord);
      }
  
      @Override
      public boolean isLoggable(final Level level) {
          return logger.isEnabled(LevelTranslator.toLevel(level));
      }
  
      @Override
      public String getName() {
          return logger.getName();
      }
  
      @Override
      public void setLevel(final Level newLevel) throws SecurityException {
          throw new UnsupportedOperationException("Cannot set level through log4j-api");
      }
  
      /**
       * Provides access to {@link Logger#setLevel(java.util.logging.Level)}. This method should only be used by child
       * classes.
       *
       * @see Logger#setLevel(java.util.logging.Level)
       */
      protected void doSetLevel(final Level newLevel) throws SecurityException {
          super.setLevel(newLevel);
      }
  
      /**
       * Unsupported operation.
       * @throws UnsupportedOperationException always
       */
      @Override
     public void setParent(final Logger parent) {
         throw new UnsupportedOperationException("Cannot set parent logger");
     }
 
     @Override
     public void log(final Level level, final String msg) {
         logger.log(LevelTranslator.toLevel(level), msg);
     }
 
     @Override
     public void log(final Level level, final String msg, final Object param1) {
         logger.log(LevelTranslator.toLevel(level), msg, param1);
     }
 
     @Override
     public void log(final Level level, final String msg, final Object[] params) {
         logger.log(LevelTranslator.toLevel(level), msg, params);
     }
 
     @Override
     public void log(final Level level, final String msg, final Throwable thrown) {
         logger.log(LevelTranslator.toLevel(level), msg, thrown);
     }
 
     @Override
     public void logp(final Level level, final String sourceClass, final String sourceMethod, final String msg) {
         log(level, msg);
     }
 
     @Override
     public void logp(final Level level, final String sourceClass, final String sourceMethod, final String msg,
                      final Object param1) {
         log(level, msg, param1);
     }
 
     @Override
     public void logp(final Level level, final String sourceClass, final String sourceMethod, final String msg,
                      final Object[] params) {
         log(level, msg, params);
     }
 
     @Override
     public void logp(final Level level, final String sourceClass, final String sourceMethod, final String msg,
                      final Throwable thrown) {
         log(level, msg, thrown);
     }
 
     @Override
     public void logrb(final Level level, final String sourceClass, final String sourceMethod, final String bundleName,
                       final String msg) {
         log(level, msg);
     }
 
     @Override
     public void logrb(final Level level, final String sourceClass, final String sourceMethod, final String bundleName,
                       final String msg, final Object param1) {
         log(level, msg, param1);
     }
 
     @Override
     public void logrb(final Level level, final String sourceClass, final String sourceMethod, final String bundleName,
                       final String msg, final Object[] params) {
         log(level, msg, params);
     }
 
     @Override
     public void logrb(final Level level, final String sourceClass, final String sourceMethod, final String bundleName,
                       final String msg, final Throwable thrown) {
         log(level, msg, thrown);
     }
 
     @Override
     public void entering(final String sourceClass, final String sourceMethod) {
         logger.entry();
     }
 
     @Override
     public void entering(final String sourceClass, final String sourceMethod, final Object param1) {
         logger.entry(param1);
     }
 
     @Override
     public void entering(final String sourceClass, final String sourceMethod, final Object[] params) {
         logger.entry(params);
     }
 
     @Override
     public void exiting(final String sourceClass, final String sourceMethod) {
         logger.exit();
     }
 
     @Override
     public void exiting(final String sourceClass, final String sourceMethod, final Object result) {
         logger.exit(result);
     }
 
     @Override
     public void throwing(final String sourceClass, final String sourceMethod, final Throwable thrown) {
         logger.throwing(thrown);
     }
 
     @Override
     public void severe(final String msg) {
         logger.logIfEnabled(FQCN, org.apache.logging.log4j.Level.ERROR, null, msg);
     }
 
     @Override
     public void warning(final String msg) {
         logger.logIfEnabled(FQCN, org.apache.logging.log4j.Level.WARN, null, msg);
     }
 
     @Override
     public void info(final String msg) {
         logger.logIfEnabled(FQCN, org.apache.logging.log4j.Level.INFO, null, msg);
     }
 
     @Override
     public void config(final String msg) {
         logger.logIfEnabled(FQCN, LevelTranslator.CONFIG, null, msg);
     }
 
     @Override
     public void fine(final String msg) {
         logger.logIfEnabled(FQCN, org.apache.logging.log4j.Level.DEBUG, null, msg);
     }
 
     @Override
     public void finer(final String msg) {
         logger.logIfEnabled(FQCN, org.apache.logging.log4j.Level.TRACE, null, msg);
     }
 
     @Override
     public void finest(final String msg) {
         logger.logIfEnabled(FQCN, LevelTranslator.FINEST, null, msg);
     }
 }