Class NullLogger
- java.lang.Object
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- loci.poi.util.POILogger
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- loci.poi.util.NullLogger
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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)
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Constructor Summary
Constructors Constructor Description NullLogger()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
check(int level)
Check if a logger is enabled to log at the specified levelvoid
initialize(String cat)
void
log(int level, Object obj1)
Log a messagevoid
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 messagevoid
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.
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Method Detail
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initialize
public void initialize(String cat)
- Specified by:
initialize
in classPOILogger
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log
public void log(int level, Object obj1)
Log a message
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check
public boolean check(int level)
Check if a logger is enabled to log at the specified level
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log
public void log(int level, Object obj1, Object obj2)
Log a message. Lazily appends Object parameters together.
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log
public void log(int level, Object obj1, Object obj2, Object obj3)
Log a message. Lazily appends Object parameters together.
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log
public void log(int level, Object obj1, Object obj2, Object obj3, Object obj4)
Log a message. Lazily appends Object parameters together.
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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 classPOILogger
- Parameters:
level
- One of DEBUG, INFO, WARN, ERROR, FATALobj1
- first Object to place in the messageobj2
- second Object to place in the messageobj3
- third Object to place in the messageobj4
- fourth Object to place in the messageobj5
- fifth Object to place in the message
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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 classPOILogger
- Parameters:
level
- One of DEBUG, INFO, WARN, ERROR, FATALobj1
- first Object to place in the messageobj2
- second Object to place in the messageobj3
- third Object to place in the messageobj4
- fourth Object to place in the messageobj5
- fifth Object to place in the messageobj6
- sixth Object to place in the message
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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 classPOILogger
- Parameters:
level
- One of DEBUG, INFO, WARN, ERROR, FATALobj1
- first Object to place in the messageobj2
- second Object to place in the messageobj3
- third Object to place in the messageobj4
- fourth Object to place in the messageobj5
- fifth Object to place in the messageobj6
- sixth Object to place in the messageobj7
- seventh Object to place in the message
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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 classPOILogger
- Parameters:
level
- One of DEBUG, INFO, WARN, ERROR, FATALobj1
- first Object to place in the messageobj2
- second Object to place in the messageobj3
- third Object to place in the messageobj4
- fourth Object to place in the messageobj5
- fifth Object to place in the messageobj6
- sixth Object to place in the messageobj7
- seventh Object to place in the messageobj8
- eighth Object to place in the message
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log
public void log(int level, Object obj1, Object obj2, Throwable exception)
Log a message. Lazily appends Object parameters together.
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log
public void log(int level, Object obj1, Object obj2, Object obj3, Throwable exception)
Log a message. Lazily appends Object parameters together.
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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 classPOILogger
- Parameters:
level
- One of DEBUG, INFO, WARN, ERROR, FATALobj1
- first Object to place in the messageobj2
- second Object to place in the messageobj3
- third object to place in the messageobj4
- fourth object to place in the messageexception
- An exception to be logged
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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 classPOILogger
- Parameters:
level
- One of DEBUG, INFO, WARN, ERROR, FATALobj1
- first Object to place in the messageobj2
- second Object to place in the messageobj3
- third object to place in the messageobj4
- fourth object to place in the messageobj5
- fifth object to place in the messageexception
- An exception to be logged
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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 classPOILogger
- Parameters:
level
- One of DEBUG, INFO, WARN, ERROR, FATALobj1
- first Object to place in the messageobj2
- second Object to place in the messageobj3
- third object to place in the messageobj4
- fourth object to place in the messageobj5
- fifth object to place in the messageobj6
- sixth object to place in the messageexception
- An exception to be logged
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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 classPOILogger
- Parameters:
level
- One of DEBUG, INFO, WARN, ERROR, FATALobj1
- first Object to place in the messageobj2
- second Object to place in the messageobj3
- third object to place in the messageobj4
- fourth object to place in the messageobj5
- fifth object to place in the messageobj6
- sixth object to place in the messageobj7
- seventh object to place in the messageexception
- An exception to be logged
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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 classPOILogger
- Parameters:
level
- One of DEBUG, INFO, WARN, ERROR, FATALobj1
- first Object to place in the messageobj2
- second Object to place in the messageobj3
- third object to place in the messageobj4
- fourth object to place in the messageobj5
- fifth object to place in the messageobj6
- sixth object to place in the messageobj7
- seventh object to place in the messageobj8
- eighth object to place in the messageexception
- An exception to be logged
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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 classPOILogger
- Parameters:
level
- One of DEBUG, INFO, WARN, ERROR, FATALmessage
- The message to log.obj1
- The first object to match against.
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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 classPOILogger
- Parameters:
level
- One of DEBUG, INFO, WARN, ERROR, FATALmessage
- The message to log.obj1
- The first object to match against.obj2
- The second object to match against.
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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 classPOILogger
- Parameters:
level
- One of DEBUG, INFO, WARN, ERROR, FATALmessage
- 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.
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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 classPOILogger
- Parameters:
level
- One of DEBUG, INFO, WARN, ERROR, FATALmessage
- 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.
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