Manpages - XML_LibXML_AttributeHash.3pm

XML::LibXML::AttributeHash - tie an XML::LibXML::Element to a hash to access its attributes

tie my %hash, XML::LibXML::AttributeHash, $element; $hash{href} = http://example.com/; print $element->getAttribute(href) . “\n”;

This class allows an element’s attributes to be accessed as if they were a plain old Perl hash. Attribute names become hash keys. Namespaced attributes are keyed using Clark notation.

my $XLINK = http://www.w3.org/1999/xlink; tie my %hash, XML::LibXML::AttributeHash, $element; $hash{“{$XLINK}href”} = http://localhost/; print $element->getAttributeNS($XLINK, href) . “\n”;

There is rarely any need to use XML::LibXML::AttributeHash directly. In general, it is possible to take advantage of XML::LibXML::Element’s overloading. The example in the SYNOPSIS could have been written:

$element->{href} = http://example.com/; print $element->getAttribute(href) . “\n”;

The tie interface allows the passing of additional arguments to XML::LibXML::AttributeHash:

tie my %hash, XML::LibXML::AttributeHash, $element, %args;

Currently only one argument is supported, the boolean weaken which (if true) indicates that the tied object’s reference to the element should be a weak reference. This is used by XML::LibXML::Element’s overloading. The weaken argument is ignored if you don’t have a working Scalar::Util::weaken.