/usr/lib/perl5/XML/LibXML/AttributeHash.pm is in libxml-libxml-perl 2.0108+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 | package XML::LibXML::AttributeHash;
use strict;
use warnings;
use Scalar::Util qw//;
use Tie::Hash;
our @ISA = qw/Tie::Hash/;
use vars qw($VERSION);
$VERSION = "2.0108"; # VERSION TEMPLATE: DO NOT CHANGE
BEGIN
{
*__HAS_WEAKEN = defined(&Scalar::Util::weaken)
? sub () { 1 }
: sub () { 0 };
};
sub element
{
return $_[0][0];
}
sub from_clark
{
my ($self, $str) = @_;
if ($str =~ m! \{ (.+) \} (.+) !x)
{
return ($1, $2);
}
return (undef, $str);
}
sub to_clark
{
my ($self, $ns, $local) = @_;
defined $ns ? "{$ns}$local" : $local;
}
sub all_keys
{
my ($self, @keys) = @_;
my $elem = $self->element;
foreach my $attr (defined($elem) ? $elem->attributes : ())
{
if (! $attr->isa('XML::LibXML::Namespace'))
{
push @keys, $self->to_clark($attr->namespaceURI, $attr->localname);
}
}
return sort @keys;
}
sub TIEHASH
{
my ($class, $element, %args) = @_;
my $self = bless [$element, undef, \%args], $class;
if (__HAS_WEAKEN and $args{weaken})
{
Scalar::Util::weaken( $self->[0] );
}
return $self;
}
sub STORE
{
my ($self, $key, $value) = @_;
my ($key_ns, $key_local) = $self->from_clark($key);
if (defined $key_ns)
{
return $self->element->setAttributeNS($key_ns, "xxx:$key_local", "$value");
}
else
{
return $self->element->setAttribute($key_local, "$value");
}
}
sub FETCH
{
my ($self, $key) = @_;
my ($key_ns, $key_local) = $self->from_clark($key);
if (defined $key_ns)
{
return $self->element->getAttributeNS($key_ns, "$key_local");
}
else
{
return $self->element->getAttribute($key_local);
}
}
sub EXISTS
{
my ($self, $key) = @_;
my ($key_ns, $key_local) = $self->from_clark($key);
if (defined $key_ns)
{
return $self->element->hasAttributeNS($key_ns, "$key_local");
}
else
{
return $self->element->hasAttribute($key_local);
}
}
sub DELETE
{
my ($self, $key) = @_;
my ($key_ns, $key_local) = $self->from_clark($key);
if (defined $key_ns)
{
return $self->element->removeAttributeNS($key_ns, "$key_local");
}
else
{
return $self->element->removeAttribute($key_local);
}
}
sub FIRSTKEY
{
my ($self) = @_;
my @keys = $self->all_keys;
$self->[1] = \@keys;
if (wantarray)
{
return ($keys[0], $self->FETCH($keys[0]));
}
$keys[0];
}
sub NEXTKEY
{
my ($self, $lastkey) = @_;
my @keys = defined $self->[1] ? @{ $self->[1] } : $self->all_keys;
my $found;
foreach my $k (@keys)
{
if ($k gt $lastkey)
{
$found = $k and last;
}
}
if (!defined $found)
{
$self->[1] = undef;
return;
}
if (wantarray)
{
return ($found, $self->FETCH($found));
}
return $found;
}
sub SCALAR
{
my ($self) = @_;
return $self->element;
}
sub CLEAR
{
my ($self) = @_;
foreach my $k ($self->all_keys)
{
$self->DELETE($k);
}
return $self;
}
__PACKAGE__
__END__
=head1 NAME
XML::LibXML::AttributeHash - tie an XML::LibXML::Element to a hash to access its attributes
=head1 SYNOPSIS
tie my %hash, 'XML::LibXML::AttributeHash', $element;
$hash{'href'} = 'http://example.com/';
print $element->getAttribute('href') . "\n";
=head1 DESCRIPTION
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.
|