package uk.org.lidalia.slf4jext;
   
   import com.google.common.collect.ImmutableSet;
   import org.slf4j.Logger;
   import org.slf4j.Marker;
   
   import java.util.HashSet;
   
   import static com.google.common.collect.Sets.immutableEnumSet;
  import static com.google.common.collect.Sets.newHashSet;
  import static java.util.Arrays.asList;
  
  /**
   * Enum modelling the logical levels implied by the way <a href="http://www.slf4j.org">SLF4J</a> has the same set of methods
   * repeated with different names.
   */
  public enum Level {
  
      TRACE {
          @Override
          boolean isEnabled(final Logger logger) {
              return logger.isTraceEnabled();
          }
          @Override
          void log(final Logger logger, final String message) {
              logger.trace(message);
          }
          @Override
          void log(final Logger logger, final String message, final Object arg1) {
              logger.trace(message, arg1);
          }
          @Override
          void log(final Logger logger, final String message, final Object arg1, final Object arg2) {
              logger.trace(message, arg1, arg2);
          }
          @Override
          void log(final Logger logger, final String message, final Object[] args) {
              logger.trace(message, args);
          }
          @Override
          void log(final Logger logger, final String message, final Throwable throwable) {
              logger.trace(message, throwable);
          }
          @Override
          boolean isEnabled(final Logger logger, final Marker marker) {
              return logger.isTraceEnabled(marker);
          }
          @Override
          void log(final Logger logger, final Marker marker, final String message) {
              logger.trace(marker, message);
          }
          @Override
          void log(final Logger logger, final Marker marker, final String message, final Object arg1) {
              logger.trace(marker, message, arg1);
          }
          @Override
          void log(final Logger logger, final Marker marker, final String message, final Object arg1, final Object arg2) {
              logger.trace(marker, message, arg1, arg2);
          }
          @Override
          void log(final Logger logger, final Marker marker, final String message, final Object[] args) {
              logger.trace(marker, message, args);
          }
          @Override
          void log(final Logger logger, final Marker marker, final String message, final Throwable throwable) {
              logger.trace(marker, message, throwable);
          }
      },
  
      DEBUG {
          @Override
          boolean isEnabled(final Logger logger) {
              return logger.isDebugEnabled();
          }
          @Override
          void log(final Logger logger, final String message) {
              logger.debug(message);
          }
          @Override
          void log(final Logger logger, final String message, final Object arg1) {
              logger.debug(message, arg1);
          }
          @Override
          void log(final Logger logger, final String message, final Object arg1, final Object arg2) {
              logger.debug(message, arg1, arg2);
          }
          @Override
          void log(final Logger logger, final String message, final Object[] args) {
              logger.debug(message, args);
          }
          @Override
          void log(final Logger logger, final String message, final Throwable throwable) {
              logger.debug(message, throwable);
          }
          @Override
          boolean isEnabled(final Logger logger, final Marker marker) {
              return logger.isDebugEnabled(marker);
          }
          @Override
         void log(final Logger logger, final Marker marker, final String message) {
             logger.debug(marker, message);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object arg1) {
             logger.debug(marker, message, arg1);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object arg1, final Object arg2) {
             logger.debug(marker, message, arg1, arg2);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object[] args) {
             logger.debug(marker, message, args);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Throwable throwable) {
             logger.debug(marker, message, throwable);
         }
     },
 
     INFO {
         @Override
         boolean isEnabled(final Logger logger) {
             return logger.isInfoEnabled();
         }
         @Override
         void log(final Logger logger, final String message) {
             logger.info(message);
         }
         @Override
         void log(final Logger logger, final String message, final Object arg1) {
             logger.info(message, arg1);
         }
         @Override
         void log(final Logger logger, final String message, final Object arg1, final Object arg2) {
             logger.info(message, arg1, arg2);
         }
         @Override
         void log(final Logger logger, final String message, final Object[] args) {
             logger.info(message, args);
         }
         @Override
         void log(final Logger logger, final String message, final Throwable throwable) {
             logger.info(message, throwable);
         }
         @Override
         boolean isEnabled(final Logger logger, final Marker marker) {
             return logger.isInfoEnabled(marker);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message) {
             logger.info(marker, message);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object arg1) {
             logger.info(marker, message, arg1);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object arg1, final Object arg2) {
             logger.info(marker, message, arg1, arg2);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object[] args) {
             logger.info(marker, message, args);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Throwable throwable) {
             logger.info(marker, message, throwable);         }
     },
 
     WARN {
         @Override
         boolean isEnabled(final Logger logger) {
             return logger.isWarnEnabled();
         }
         @Override
         void log(final Logger logger, final String message) {
             logger.warn(message);
         }
         @Override
         void log(final Logger logger, final String message, final Object arg1) {
             logger.warn(message, arg1);
         }
         @Override
         void log(final Logger logger, final String message, final Object arg1, final Object arg2) {
             logger.warn(message, arg1, arg2);
         }
         @Override
         void log(final Logger logger, final String message, final Object[] args) {
             logger.warn(message, args);
         }
         @Override
         void log(final Logger logger, final String message, final Throwable throwable) {
             logger.warn(message, throwable);
         }
         @Override
         boolean isEnabled(final Logger logger, final Marker marker) {
             return logger.isWarnEnabled(marker);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message) {
             logger.warn(marker, message);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object arg1) {
             logger.warn(marker, message, arg1);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object arg1, final Object arg2) {
             logger.warn(marker, message, arg1, arg2);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object[] args) {
             logger.warn(marker, message, args);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Throwable throwable) {
             logger.warn(marker, message, throwable);
        }
     },
 
     ERROR {
         @Override
         boolean isEnabled(final Logger logger) {
             return logger.isErrorEnabled();
        }
         @Override
         void log(final Logger logger, final String message) {
             logger.error(message);
         }
         @Override
         void log(final Logger logger, final String message, final Object arg1) {
             logger.error(message, arg1);
         }
         @Override
         void log(final Logger logger, final String message, final Object arg1, final Object arg2) {
             logger.error(message, arg1, arg2);
         }
         @Override
         void log(final Logger logger, final String message, final Object[] args) {
             logger.error(message, args);
         }
         @Override
         void log(final Logger logger, final String message, final Throwable throwable) {
             logger.error(message, throwable);
         }
         @Override
         boolean isEnabled(final Logger logger, final Marker marker) {
             return logger.isErrorEnabled(marker);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message) {
             logger.error(marker, message);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object arg1) {
             logger.error(marker, message, arg1);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object arg1, final Object arg2) {
             logger.error(marker, message, arg1, arg2);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object[] args) {
             logger.error(marker, message, args);
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Throwable throwable) {
             logger.error(marker, message, throwable);
         }
     },
 
     OFF {
         @Override
         boolean isEnabled(final Logger logger) {
             return false;
         }
         @Override
         void log(final Logger logger, final String message) {
             // Do nothing
         }
         @Override
         void log(final Logger logger, final String message, final Object arg1) {
             // Do nothing
         }
         @Override
         void log(final Logger logger, final String message, final Object arg1, final Object arg2) {
             // Do nothing
         }
         @Override
         void log(final Logger logger, final String message, final Object[] args) {
             // Do nothing
         }
         @Override
         void log(final Logger logger, final String message, final Throwable throwable) {
             // Do nothing
         }
         @Override
         boolean isEnabled(final Logger logger, final Marker marker) {
             return false;
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message) {
             // Do nothing
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object arg1) {
             // Do nothing
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object arg1, final Object arg2) {
             // Do nothing
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Object[] args) {
             // Do nothing
         }
         @Override
         void log(final Logger logger, final Marker marker, final String message, final Throwable throwable) {
             // Do nothing
         }
     };
 
     private static final ImmutableSet<Level> ALL_LEVELS = immutableEnumSet(asList(values()));
     private static final ImmutableSet<Level> ENABLABLE_LEVELS = makeEnablabeValues();
 
     abstract boolean isEnabled(Logger logger);
 
     abstract void log(Logger logger, String message);
 
     abstract void log(Logger logger, String message, Object arg1);
 
     abstract void log(Logger logger, String message, Object arg1, Object arg2);
 
     abstract void log(Logger logger, String message, Object[] args);
 
     abstract void log(Logger logger, String message, Throwable throwable);
 
     abstract boolean isEnabled(Logger logger, Marker marker);
 
     abstract void log(final Logger logger, Marker marker, final String message);
 
     abstract void log(Logger logger, Marker marker, String message, Object arg1);
 
     abstract void log(Logger logger, Marker marker, String message, Object arg1, Object arg2);
 
     abstract void log(Logger logger, Marker marker, String message, Object[] args);
 
     abstract void log(Logger logger, Marker marker, String message, Throwable throwable);
 
     /**
      * @return an ImmutableSet containing the constants of this enum type
      */
     public static ImmutableSet<Level> valueSet() {
         return ALL_LEVELS;
     }
 
     /**
      * @return an ImmutableSet containing the constants of this enum type other than OFF
      */
     public static ImmutableSet<Level> enablableValueSet() {
         return ENABLABLE_LEVELS;
     }
 
     private static ImmutableSet<Level> makeEnablabeValues() {
         final HashSet<Level> levels = newHashSet(values());
         levels.remove(OFF);
         return immutableEnumSet(levels);
     }
 }