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.\" ========================================================================
.\"
.IX Title "NullLogLite 3pm"
.TH NullLogLite 3pm "2021-01-05" "perl v5.32.0" "User Contributed Perl Documentation"
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.SH "NAME"
Log::NullLogLite \- The "Log::NullLogLite" class implements the Null Object 
pattern for the "Log::LogLite" class.
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Log::NullLogLite;
\&               
\&  # create new Log::NullLogLite object
\&  my $log = new Log::NullLogLite();
\&
\&  ...
\&
\&  # we had an error (this entry will not be written to the log 
\&  # file because we use Log::NullLogLite object).
\&  $log\->write("Could not open the file ".$file_name.": $!", 4);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \f(CW\*(C`Log::NullLogLite\*(C'\fR class is derived from the \f(CW\*(C`Log::LogLite\*(C'\fR class 
and implement the Null Object Pattern to let us to use the \f(CW\*(C`Log::LogLite\*(C'\fR 
class with \fBnull\fR \f(CW\*(C`Log::LogLite\*(C'\fR objects.
We might want to do that if we use a \f(CW\*(C`Log::LogLite\*(C'\fR object in our code, and
we do not want always to actually define a \f(CW\*(C`Log::LogLite\*(C'\fR object (i.e. not 
always we want to write to a log file). In such a case we will create a 
\&\f(CW\*(C`Log::NullLogLite\*(C'\fR object instead of the \f(CW\*(C`Log::LogLite\*(C'\fR object, and will 
use that object instead.
The object has all the methods that the \f(CW\*(C`Log::LogLite\*(C'\fR object has, but 
those methods do nothing. Thus our code will continue to run without any
change, yet we will not have to define a log file path for the 
\&\f(CW\*(C`Log::LogLite\*(C'\fR object, and no log will be created.
.SH "CONSTRUCTOR"
.IX Header "CONSTRUCTOR"
.IP "new ( \s-1FILEPATH\s0 [,LEVEL [,DEFAULT_MESSAGE ]] )" 4
.IX Item "new ( FILEPATH [,LEVEL [,DEFAULT_MESSAGE ]] )"
The constructor. The parameters will not have any affect.
Returns the new Log::NullLogLite object.
.SH "METHODS"
.IX Header "METHODS"
.IP "write( \s-1MESSAGE\s0 [, \s-1LEVEL\s0 ] )" 4
.IX Item "write( MESSAGE [, LEVEL ] )"
Does nothing. The parameters will not have any affect.
Returns nothing.
.IP "level( [ \s-1LEVEL\s0 ] )" 4
.IX Item "level( [ LEVEL ] )"
Does nothing. The parameters will not have any affect.
Returns \-1.
.IP "default_message( [ \s-1MESSAGE\s0 ] )" 4
.IX Item "default_message( [ MESSAGE ] )"
Does nothing. The parameters will not have any affect.
Returns empty string ("").
.SH "AUTHOR"
.IX Header "AUTHOR"
Rani Pinchuk, rani@cpan.org
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (c) 2001\-2002 Ockham Technology N.V. & Rani Pinchuk. 
All rights reserved.  
This package is free software; you can redistribute it and/or modify 
it under the same terms as Perl itself.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBLog::LogLite\fR\|(3),
The Null Object Pattern \- Bobby Woolf \- PLoP96 \- published in Pattern 
Languages of Program Design 3 (http://cseng.aw.com/book/0,,0201310112,00.html)