blob: 3cd91ede4b8add0785f3734e40934cc56cd71392 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
=head1 NAME
XML::LibXML::XPathExpression - XML::LibXML::XPathExpression - interface to libxml2 pre-compiled XPath expressions
=head1 SYNOPSIS
use XML::LibXML;
my $compiled_xpath = XML::LibXML::XPathExpression->new('//foo[@bar="baz"][position()<4]');
# interface from XML::LibXML::Node
my $result = $node->find($compiled_xpath);
my @nodes = $node->findnodes($compiled_xpath);
my $value = $node->findvalue($compiled_xpath);
# interface from XML::LibXML::XPathContext
my $result = $xpc->find($compiled_xpath,$node);
my @nodes = $xpc->findnodes($compiled_xpath,$node);
my $value = $xpc->findvalue($compiled_xpath,$node);
$compiled = XML::LibXML::XPathExpression->new( xpath_string );
=head1 DESCRIPTION
This is a perl interface to libxml2's pre-compiled XPath expressions.
Pre-compiling an XPath expression can give in some performance benefit if the
same XPath query is evaluated many times. C<<<<<< XML::LibXML::XPathExpression >>>>>> objects can be passed to all C<<<<<< find... >>>>>> functions C<<<<<< XML::LibXML >>>>>> that expect an XPath expression.
=over 4
=item new()
$compiled = XML::LibXML::XPathExpression->new( xpath_string );
The constructor takes an XPath 1.0 expression as a string and returns an object
representing the pre-compiled expressions (the actual data structure is
internal to libxml2).
=back
=head1 AUTHORS
Matt Sergeant,
Christian Glahn,
Petr Pajas
=head1 VERSION
2.0209
=head1 COPYRIGHT
2001-2007, AxKit.com Ltd.
2002-2006, Christian Glahn.
2006-2009, Petr Pajas.
=cut
=head1 LICENSE
This program is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
|
