Package loci.poi.util

Class NullLogger

java.lang.Object
loci.poi.util.POILogger
loci.poi.util.NullLogger

public class NullLogger extends POILogger
A logger class that strives to make it as easy as possible for developers to write log calls, while simultaneously making those calls as cheap as possible by performing lazy evaluation of the log message.

Author:
Marc Johnson (mjohnson at apache dot org), Glen Stampoultzis (glens at apache.org), Nicola Ken Barozzi (nicolaken at apache.org)
  • Constructor Details

    • NullLogger

      public NullLogger()
  • Method Details

    • initialize

      public void initialize(String cat)
      Specified by:
      initialize in class POILogger
    • log

      public void log(int level, Object obj1)
      Log a message
      Specified by:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - The object to log.
    • check

      public boolean check(int level)
      Check if a logger is enabled to log at the specified level
      Specified by:
      check in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
    • log

      public void log(int level, Object obj1, Object obj2)
      Log a message. Lazily appends Object parameters together.
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - first object to place in the message
      obj2 - second object to place in the message
    • log

      public void log(int level, Object obj1, Object obj2, Object obj3)
      Log a message. Lazily appends Object parameters together.
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - first Object to place in the message
      obj2 - second Object to place in the message
      obj3 - third Object to place in the message
    • log

      public void log(int level, Object obj1, Object obj2, Object obj3, Object obj4)
      Log a message. Lazily appends Object parameters together.
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - first Object to place in the message
      obj2 - second Object to place in the message
      obj3 - third Object to place in the message
      obj4 - fourth Object to place in the message
    • log

      public void log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5)
      Log a message. Lazily appends Object parameters together.
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - first Object to place in the message
      obj2 - second Object to place in the message
      obj3 - third Object to place in the message
      obj4 - fourth Object to place in the message
      obj5 - fifth Object to place in the message
    • log

      public void log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5, Object obj6)
      Log a message. Lazily appends Object parameters together.
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - first Object to place in the message
      obj2 - second Object to place in the message
      obj3 - third Object to place in the message
      obj4 - fourth Object to place in the message
      obj5 - fifth Object to place in the message
      obj6 - sixth Object to place in the message
    • log

      public void log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5, Object obj6, Object obj7)
      Log a message. Lazily appends Object parameters together.
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - first Object to place in the message
      obj2 - second Object to place in the message
      obj3 - third Object to place in the message
      obj4 - fourth Object to place in the message
      obj5 - fifth Object to place in the message
      obj6 - sixth Object to place in the message
      obj7 - seventh Object to place in the message
    • log

      public void log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5, Object obj6, Object obj7, Object obj8)
      Log a message. Lazily appends Object parameters together.
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - first Object to place in the message
      obj2 - second Object to place in the message
      obj3 - third Object to place in the message
      obj4 - fourth Object to place in the message
      obj5 - fifth Object to place in the message
      obj6 - sixth Object to place in the message
      obj7 - seventh Object to place in the message
      obj8 - eighth Object to place in the message
    • log

      public void log(int level, Object obj1, Throwable exception)
      Log a message
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - The object to log. This is converted to a string.
      exception - An exception to be logged
    • log

      public void log(int level, Object obj1, Object obj2, Throwable exception)
      Log a message. Lazily appends Object parameters together.
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - first Object to place in the message
      obj2 - second Object to place in the message
      exception - An exception to be logged
    • log

      public void log(int level, Object obj1, Object obj2, Object obj3, Throwable exception)
      Log a message. Lazily appends Object parameters together.
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - first Object to place in the message
      obj2 - second Object to place in the message
      obj3 - third object to place in the message
      exception - An error message to be logged
    • log

      public void log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Throwable exception)
      Log a message. Lazily appends Object parameters together.
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - first Object to place in the message
      obj2 - second Object to place in the message
      obj3 - third object to place in the message
      obj4 - fourth object to place in the message
      exception - An exception to be logged
    • log

      public void log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5, Throwable exception)
      Log a message. Lazily appends Object parameters together.
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - first Object to place in the message
      obj2 - second Object to place in the message
      obj3 - third object to place in the message
      obj4 - fourth object to place in the message
      obj5 - fifth object to place in the message
      exception - An exception to be logged
    • log

      public void log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5, Object obj6, Throwable exception)
      Log a message. Lazily appends Object parameters together.
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - first Object to place in the message
      obj2 - second Object to place in the message
      obj3 - third object to place in the message
      obj4 - fourth object to place in the message
      obj5 - fifth object to place in the message
      obj6 - sixth object to place in the message
      exception - An exception to be logged
    • log

      public void log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5, Object obj6, Object obj7, Throwable exception)
      Log a message. Lazily appends Object parameters together.
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - first Object to place in the message
      obj2 - second Object to place in the message
      obj3 - third object to place in the message
      obj4 - fourth object to place in the message
      obj5 - fifth object to place in the message
      obj6 - sixth object to place in the message
      obj7 - seventh object to place in the message
      exception - An exception to be logged
    • log

      public void log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5, Object obj6, Object obj7, Object obj8, Throwable exception)
      Log a message. Lazily appends Object parameters together.
      Overrides:
      log in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      obj1 - first Object to place in the message
      obj2 - second Object to place in the message
      obj3 - third object to place in the message
      obj4 - fourth object to place in the message
      obj5 - fifth object to place in the message
      obj6 - sixth object to place in the message
      obj7 - seventh object to place in the message
      obj8 - eighth object to place in the message
      exception - An exception to be logged
    • logFormatted

      public void logFormatted(int level, String message, Object obj1)
      Logs a formated message. The message itself may contain % characters as place holders. This routine will attempt to match the placeholder by looking at the type of parameter passed to obj1.

      If the parameter is an array, it traverses the array first and matches parameters sequentially against the array items. Otherwise the parameters after message are matched in order.

      If the place holder matches against a number it is printed as a whole number. This can be overridden by specifying a precision in the form %n.m where n is the padding for the whole part and m is the number of decimal places to display. n can be excluded if desired. n and m may not be more than 9.

      If the last parameter (after flattening) is a Throwable it is logged specially.

      Overrides:
      logFormatted in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      message - The message to log.
      obj1 - The first object to match against.
    • logFormatted

      public void logFormatted(int level, String message, Object obj1, Object obj2)
      Logs a formated message. The message itself may contain % characters as place holders. This routine will attempt to match the placeholder by looking at the type of parameter passed to obj1.

      If the parameter is an array, it traverses the array first and matches parameters sequentially against the array items. Otherwise the parameters after message are matched in order.

      If the place holder matches against a number it is printed as a whole number. This can be overridden by specifying a precision in the form %n.m where n is the padding for the whole part and m is the number of decimal places to display. n can be excluded if desired. n and m may not be more than 9.

      If the last parameter (after flattening) is a Throwable it is logged specially.

      Overrides:
      logFormatted in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      message - The message to log.
      obj1 - The first object to match against.
      obj2 - The second object to match against.
    • logFormatted

      public void logFormatted(int level, String message, Object obj1, Object obj2, Object obj3)
      Logs a formated message. The message itself may contain % characters as place holders. This routine will attempt to match the placeholder by looking at the type of parameter passed to obj1.

      If the parameter is an array, it traverses the array first and matches parameters sequentially against the array items. Otherwise the parameters after message are matched in order.

      If the place holder matches against a number it is printed as a whole number. This can be overridden by specifying a precision in the form %n.m where n is the padding for the whole part and m is the number of decimal places to display. n can be excluded if desired. n and m may not be more than 9.

      If the last parameter (after flattening) is a Throwable it is logged specially.

      Overrides:
      logFormatted in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      message - The message to log.
      obj1 - The first object to match against.
      obj2 - The second object to match against.
      obj3 - The third object to match against.
    • logFormatted

      public void logFormatted(int level, String message, Object obj1, Object obj2, Object obj3, Object obj4)
      Logs a formated message. The message itself may contain % characters as place holders. This routine will attempt to match the placeholder by looking at the type of parameter passed to obj1.

      If the parameter is an array, it traverses the array first and matches parameters sequentially against the array items. Otherwise the parameters after message are matched in order.

      If the place holder matches against a number it is printed as a whole number. This can be overridden by specifying a precision in the form %n.m where n is the padding for the whole part and m is the number of decimal places to display. n can be excluded if desired. n and m may not be more than 9.

      If the last parameter (after flattening) is a Throwable it is logged specially.

      Overrides:
      logFormatted in class POILogger
      Parameters:
      level - One of DEBUG, INFO, WARN, ERROR, FATAL
      message - The message to log.
      obj1 - The first object to match against.
      obj2 - The second object to match against.
      obj3 - The third object to match against.
      obj4 - The forth object to match against.