PolarSiva has asked for the wisdom of the Perl Monks concerning the following question:

Hi Monks 
i need to edit a xml node using Perl. For example

<project>
 <run_count>
  <count>13</count>
 </run_count>
</project>
i have to change the value 13 to 14 in the above example other than using regular exp. Kindly suggest some tips.

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Re: Edit a node value in xml
by toolic (Bishop) on Jul 23, 2009 at 15:10 UTC
    You could use a CPAN module, such as XML::Twig. The following code unconditionally replaces the text of all instances of 'count' elements with the value 14. 
    use strict;
use warnings;
use XML::Twig;

my $xmlStr = <<XML;
<project>
 <run_count>
  <count>13</count>
 </run_count>
</project>
XML

my $twig= new XML::Twig(
    PrettyPrint   => 'indented',
    twig_handlers => { count => \&count }
);
$twig->parse($xmlStr);
$twig->print();
exit;

sub count {
    my ($twig, $cnt) = @_;
    $cnt->set_text(14);
}  


__END__

<project>
  <run_count>
    <count>14</count>
  </run_count>
</project>

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    Side note: Welcome to the Monastery. In general, it is better to use 'code' tags instead of 'pre' tags when posting code. (see Perl Monks Approved HTML tags)

[reply]
[d/l]
      Thanks a lot toolic
      The code works great
[reply]
Re: Edit a node value in xml
by ramrod (Priest) on Jul 23, 2009 at 15:59 UTC
    Using XML::LibXML 
    use XML::LibXML;
my $template = 'sample.xml';
my $parser = XML::LibXML->new();
my $doc = $parser->parse_file($template);

my($object) = $doc->findnodes("/project/run_count/count/text()");
my $text = XML::LibXML::Text->new('14');
$object->replaceNode($text);

open (my $Output, ">$template") or die "Could not write $template";
print $Output $doc->toString;
close ($Output) or die "Could not close generated $template ";

    [download]
[reply]
[d/l]

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