XML lite unblessed reference

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

Hi Monks,
Does anyone have a guess why this code 
generates an unblessed reference error? 
Code and output below. 
The output of Data::Dump seems to 
show that $nodes is blessed 
however I get the unblessed error at the 
end of the listing. 

Thanks, 
Larry 



# Test XML::DOM::Lite

use strict "vars";
use strict "subs";

use XML::DOM::Lite qw(Parser :constants XPath);
use XML::DOM::Lite::NodeList;

use XML::Dumper;
use Data::Dumper;

my $xml = q|
  <perldata>
   <hello>
   </hello>
  </perldata>
  |;
  
my $doc = Parser->parse($xml);

my $nodes = $doc->selectNodes('/perldata/hello');

$Data::Dumper::Maxdepth=3;
print Data::Dumper->Dump($nodes);

my $len = $nodes->length;


--------------------------------

node dump
$VAR1 = bless( {
     'nodeType' => 1,
     'childNodes' => bless( [
          'XML::DOM::Lite::Node=HASH(0x1f43be4)'
        ], 'XML::DOM::Lite::NodeList' ),
     'ownerDocument' => bless( {
         'nodeType' => 9,
         'elements' => 'HASH(0x1f432a4)',
         'childNodes' => 'XML::DOM::Lite::NodeList=ARRAY(0x1f434d4)',
         'nodeName' => '#document',
         'documentElement' => 'XML::DOM::Lite::Node=HASH(0x1f439e4)',
         'attributes' => 'XML::DOM::Lite::NodeList=ARRAY(0x1f43524)'
       }, 'XML::DOM::Lite::Document' ),
     'nodeName' => 'hello',
     'attributes' => bless( [], 'XML::DOM::Lite::NodeList' ),
     'parentNode' => $VAR1->{'ownerDocument'}{'documentElement'},
     'tagName' => 'hello'
   }, 'XML::DOM::Lite::Node' );
Can't call method "length" on unblessed reference at test.pl line 26.
[download]

Comment on XML lite unblessed reference Download Code

Replies are listed 'Best First'.
Re: XML lite unblessed reference by Anonymous Monk on Aug 04, 2011 at 06:23 UTC
Hi Monks, Does anyone have a guess why this code generates an unblessed reference error? Bug in XML::DOM::Lite	[reply]
Re: XML lite unblessed reference by wind (Priest) on Aug 05, 2011 at 02:07 UTC
The selectNodes returns an array reference, not an blessed object: `my $nodes = $doc->selectNodes('/perldata/hello'); print ref($nodes), "\n"; =prints ARRAY =cut` [download]	[reply] [d/l]
Re^2: XML lite unblessed reference by Anonymous Monk on Aug 05, 2011 at 03:49 UTC
What do you suppose this means? `'attributes' => bless( [], 'XML::DOM::Lite::NodeList' ),` [download] XML::DOM::Lite::NodeList - blessed array ref for containing Node objects	[reply] [d/l]
Re^2: XML lite unblessed reference by lfast (Initiate) on Aug 08, 2011 at 16:31 UTC
Thanks. I thought I was getting a list of Nodes, not an array.	[reply]
Re^3: XML lite unblessed reference by Anonymous Monk on Aug 08, 2011 at 21:52 UTC
Thanks. I thought I was getting a list of Nodes, not an array. Um, an array is a list of nodes, and you're supposed to be getting both (blessed array reference).	[reply]