Re^3: Xml::Twig:Xpath Xpath expression error

The thing is, there is no direct textual content in any of the FlowRater elements, so text() is empty, hence //OverallConnectionPoolStatus/FlowRater/text() won't return much.

//OverallConnectionPoolStatus/FlowRater/Name/text() OTOH, will indeed give you the contents of the Name elements, if you write, for example: print map { $_ } $section->findnodes( q{//OverallConnectionPoolStatus/FlowRater/Name/text()} );.

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Re^4: Xml::Twig:Xpath Xpath expression error by leonidlm (Pilgrim) on Apr 16, 2009 at 11:48 UTC
Thank you. I tried that. The returned output is again, as before, a syntax error: `error in xpath expression //OverallConnectionPoolStatus/FlowRater/Name +/text() ar ound text() at D:\Scripts\prun84\test3.pl line 27 at D:\Scripts\prun84\test3.pl line 8 at D:\Scripts\prun84\test3.pl line 8` [download] You said it won't do much, but it shouldn't crash with an error if the expression will return nothing! I think there is a problem somehow with loading the XML::Twig::XPath module, somehow I believe I still using the XML::Twig engine. Can it be ? Just to make sure I attach the full program: `use XML::Twig::XPath; my $t = XML::Twig::XPath->new( twig_roots => { 'BalancerStatus/WebServer/OverallConnectionPoolStatus' => +\&section, #'BalancerStatus/WebServer/BalancerStatus/Server' => \&sec +tion }); $t->parsefile( 'localhost.xml'); # sub section { my ($t, $section) = @_; my $a = $section->get_xpath( q{//OverallConnectionPoolStatus/FlowR +ater/Name/text()} ); $t->purge; }` [download]	[reply] [d/l] [select]
Re^5: Xml::Twig:Xpath Xpath expression error by mirod (Canon) on Apr 16, 2009 at 11:57 UTC
Don't use `get_xpath`, use `findnodes`, as the docs state: XML::Twig does not provide natively full XPATH support, but you can use "XML::Twig::XPath" to get "findnodes" to use "XML::XPath" as the XPath engine, with full coverage of the spec. Actually the development version of XML::Twig produces the following message in that situation: error in xpath expression //OverallConnectionPoolStatus/FlowRater/Name/text() around text() the expression is a valid XPath statement, and you are using XML::Twig::XPath, but you are using either 'find_nodes' or 'get_xpath' where the method you likely wanted to use is 'findnodes', which is the only one that uses the full XPath engine	[reply]
Re^6: Xml::Twig:Xpath Xpath expression error by leonidlm (Pilgrim) on Apr 16, 2009 at 12:06 UTC
Ohhh, now it is working! BTW thank you for the wonderful module. It really helping me in saving much more on performance when I am processing big XML files. Just a small suggestion, maybe in a new version (or just in the docs) somehow make this more understandable for others, who would like to use this module in a future. Maybe to change the method name to "findnodesWithXpath" or something ... but anyway, thank you again.	[reply]


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