is_set method to see if a range has been set

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/Nagios-Plugin/trunk@1429 f882894a-f735-0410-b71e-b25c423dba1c

1 files changed, 7 insertions, 1 deletions

diff --git a/lib/Nagios/Plugin/Range.pm b/lib/Nagios/Plugin/Range.pm
index 3d6f613..c03001a 100644
--- a/lib/Nagios/Plugin/Range.pm
+++ b/lib/Nagios/Plugin/Range.pm
@@ -14,7 +14,7 @@ struct "Nagios::Plugin::Range" => {
         end => '$',
         start_infinity => '$',  # TRUE / FALSE
         end_infinity => '$',    # TRUE / FALSE
-        alert_on => '$',        # OUTSIDE 0, INSIDE 1
+        alert_on => '$',        # OUTSIDE 0, INSIDE 1, not defined == range not set
         };
 
 my $outside = 0;
@@ -22,11 +22,17 @@ my $inside = 1;
 
 sub stringify {
         my $self = shift;
+        return "" unless $self->is_set;
         return (($self->alert_on) ? "@" : "") .
                 (($self->start_infinity == 1) ? "~:" : (($self->start == 0)?"":$self->start.":")) . 
                 (($self->end_infinity == 1) ? "" : $self->end);
 }
 
+sub is_set {
+        my $self = shift;
+        (! defined $self->alert_on) ? 0 : 1;
+}
+
 sub set_range_start {
         my ($self, $value) = @_;
         $self->start($value+0); # Force scalar into number