NullLogger (Bio-Formats API)

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)

Field Summary
- Fields inherited from class loci.poi.util.POILogger
  DEBUG, ERROR, FATAL, INFO, WARN

Constructor Summary

Constructors
Constructor and Description

NullLogger()

Constructors
Constructor and Description
`NullLogger()`

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`check(int level)` Check if a logger is enabled to log at the specified level
`void`	`initialize(String cat)`
`void`	`log(int level, Object obj1)` Log a message
`void`	`log(int level, Object obj1, Object obj2)` Log a message.
`void`	`log(int level, Object obj1, Object obj2, Object obj3)` Log a message.
`void`	`log(int level, Object obj1, Object obj2, Object obj3, Object obj4)` Log a message.
`void`	`log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5)` Log a message.
`void`	`log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5, Object obj6)` Log a message.
`void`	`log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5, Object obj6, Object obj7)` Log a message.
`void`	`log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5, Object obj6, Object obj7, Object obj8)` Log a message.
`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.
`void`	`log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5, Object obj6, Object obj7, Throwable exception)` Log a message.
`void`	`log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5, Object obj6, Throwable exception)` Log a message.
`void`	`log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5, Throwable exception)` Log a message.
`void`	`log(int level, Object obj1, Object obj2, Object obj3, Object obj4, Throwable exception)` Log a message.
`void`	`log(int level, Object obj1, Object obj2, Object obj3, Throwable exception)` Log a message.
`void`	`log(int level, Object obj1, Object obj2, Throwable exception)` Log a message.
`void`	`log(int level, Object obj1, Throwable exception)` Log a message
`void`	`logFormatted(int level, String message, Object obj1)` Logs a formated message.
`void`	`logFormatted(int level, String message, Object obj1, Object obj2)` Logs a formated message.
`void`	`logFormatted(int level, String message, Object obj1, Object obj2, Object obj3)` Logs a formated message.
`void`	`logFormatted(int level, String message, Object obj1, Object obj2, Object obj3, Object obj4)` Logs a formated message.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NullLogger
```
public NullLogger()
```
- Method Detail
  - 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.

Class NullLogger

Field Summary

Fields inherited from class loci.poi.util.POILogger

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

NullLogger

Method Detail

initialize

log

check

log

log

log

log

log

log

log

log

log

log

log

log

log

log

log

logFormatted

logFormatted

logFormatted

logFormatted