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package XML::Validator::Schema::Attribute;
use strict;
use warnings;
=head1 NAME
XML::Validator::Schema::Attribute - an attribute node in a schema object
=head1 DESCRIPTION
This is an internal module used by XML::Validator::Schema to represent
attributes derived from XML Schema documents.
=cut
use XML::Validator::Schema::Util qw(_attr _err);
sub new {
my ($pkg, %arg) = @_;
my $self = bless \%arg, $pkg;
}
# create an attribute based on the contents of an element hash
sub parse {
my ($pkg, $data) = @_;
my $self = $pkg->new();
my $name = _attr($data, 'name');
$self->{name} = $name if $name;
my $ref = _attr($data, 'ref');
if ($ref) {
_err("Illegal combination of 'ref' and 'name' in <attribute>.")
if $name;
$self->{unresolved_ref} = 1;
$self->{name} = $ref;
}
_err("Found <attribute> with neither 'name' nor 'ref'.")
unless $name or $ref;
my $type_name = _attr($data, 'type');
if ($type_name) {
$self->{unresolved_type} = 1;
$self->{type_name} = $type_name;
}
# load use, defaults to optional
my $use = _attr($data, 'use') || 'optional';
_err("Invalid 'use' value in <attribute name='$name'>: '$use'.")
unless $use eq 'optional' or $use eq 'required';
$self->{required} = $use eq 'required' ? 1 : 0;
return $self;
}
1;
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