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files >> //usr/local/lib64/perl5/XML/LibXML/XPathContext.pm
# $Id: XPathContext.pm 422 2002-11-08 17:10:30Z phish $ # # This is free software, you may use it and distribute it under the same terms as # Perl itself. # # Copyright 2001-2003 AxKit.com Ltd., 2002-2006 Christian Glahn, 2006-2009 Petr Pajas # # package XML::LibXML::XPathContext; use strict; use warnings; use vars qw($VERSION @ISA $USE_LIBXML_DATA_TYPES); use Carp; use XML::LibXML; use XML::LibXML::NodeList; $VERSION = "2.0210"; # VERSION TEMPLATE: DO NOT CHANGE # should LibXML XPath data types be used for simple objects # when passing parameters to extension functions (default: no) $USE_LIBXML_DATA_TYPES = 0; sub CLONE_SKIP { 1 } sub findnodes { my ($self, $xpath, $node) = @_; my @nodes = $self->_guarded_find_call('_findnodes', $node, $xpath); if (wantarray) { return @nodes; } else { return XML::LibXML::NodeList->new(@nodes); } } sub find { my ($self, $xpath, $node) = @_; my ($type, @params) = $self->_guarded_find_call('_find', $node, $xpath,0); if ($type) { return $type->new(@params); } return undef; } sub exists { my ($self, $xpath, $node) = @_; my (undef, $value) = $self->_guarded_find_call('_find', $node, $xpath,1); return $value; } sub findvalue { my $self = shift; return $self->find(@_)->to_literal->value; } sub _guarded_find_call { my ($self, $method, $node)=(shift,shift,shift); my $prev_node; if (ref($node)) { $prev_node = $self->getContextNode(); $self->setContextNode($node); } my @ret; eval { @ret = $self->$method(@_); }; $self->_free_node_pool; $self->setContextNode($prev_node) if ref($node); if ($@) { my $err = $@; chomp $err; croak $err; } return @ret; } sub registerFunction { my ($self, $name, $sub) = @_; $self->registerFunctionNS($name, undef, $sub); return; } sub unregisterNs { my ($self, $prefix) = @_; $self->registerNs($prefix, undef); return; } sub unregisterFunction { my ($self, $name) = @_; $self->registerFunctionNS($name, undef, undef); return; } sub unregisterFunctionNS { my ($self, $name, $ns) = @_; $self->registerFunctionNS($name, $ns, undef); return; } sub unregisterVarLookupFunc { my ($self) = @_; $self->registerVarLookupFunc(undef, undef); return; } # extension function perl dispatcher # borrowed from XML::LibXSLT sub _perl_dispatcher { my $func = shift; my @params = @_; my @perlParams; my $i = 0; while (@params) { my $type = shift(@params); if ($type eq 'XML::LibXML::Literal' or $type eq 'XML::LibXML::Number' or $type eq 'XML::LibXML::Boolean') { my $val = shift(@params); unshift(@perlParams, $USE_LIBXML_DATA_TYPES ? $type->new($val) : $val); } elsif ($type eq 'XML::LibXML::NodeList') { my $node_count = shift(@params); unshift(@perlParams, $type->new(splice(@params, 0, $node_count))); } } $func = "main::$func" unless ref($func) || $func =~ /(.+)::/; no strict 'refs'; my $res = $func->(@perlParams); return $res; } 1;
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