package org.lcsim.util.log;
   
   import java.util.logging.Formatter;
   import java.util.logging.Handler;
   import java.util.logging.Level;
   import java.util.logging.LogRecord;
   import java.util.logging.Logger;
   import java.util.logging.StreamHandler;
   
  /**
   * A simple set of utility methods for creating <code>Logger</code> objects.
   *
   * @author Jeremy McCormick <jeremym@slac.stanford.edu>
   */
  public class LogUtil {
  
      private LogUtil() {
      }
  
      public static Logger create(final String name, Formatter formatter, final Level level) {
          final Logger logger = Logger.getLogger(name);
          logger.setUseParentHandlers(false);
          logger.setLevel(level);
          if (formatter == null) {
              formatter = new DefaultLogFormatter();
          }
          final Handler handler = new StreamHandler(System.out, formatter) {
              @Override
              public void publish(final LogRecord record) {
                  super.publish(record);
                  flush();
              }
          };
          handler.setLevel(Level.ALL); // Handler level is always ALL.
          logger.addHandler(handler);
          return logger;
      }
  
      public static Logger create(final Class<?> klass, final Formatter formatter) {
          return create(klass.getName(), formatter, Level.INFO);
      }
  
      public static Logger create(final Class<?> klass) {
          return create(klass, null);
      }
  
      public static Logger create(final Class<?> klass, final Formatter formatter, final Level level) {
          return create(klass.getName(), formatter, level);
      }
  
      public static void setLevel(final Logger logger, final Level level) {
          logger.setLevel(level);
          for (final Handler handler : logger.getHandlers()) {
              handler.setLevel(level);
          }
      }
  }