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package XML::Validator::Schema::ElementRefNode;
use strict;
use warnings;
use base 'XML::Validator::Schema::ElementNode';
use XML::Validator::Schema::Util qw(_err _attr);
use Carp qw(croak);
=head1 NAME
XML::Validator::Schema::ElementRefNode - an element reference node
=head1 DESCRIPTION
This is an internal module used by XML::Validator::Schema to represent
an element reference node.
=cut
sub parse {
my ($pkg, $data) = @_;
my $self = $pkg->new();
my $ref = _attr($data, 'ref');
croak("Why did you create an ElementRefNode if you didn't have a ref?")
unless $ref;
$self->{unresolved_ref} = 1;
$self->name($ref);
my $name = _attr($data, 'name');
_err("Found <element> with illegal combination of 'ref' and 'name' ".
"attributes.")
if $name;
my $type_name = _attr($data, 'type');
_err("Found <element> with illegal combination of 'ref' and 'type' ".
"attributes.")
if $type_name;
my $min = _attr($data, 'minOccurs');
$min = 1 unless defined $min;
_err("Invalid value for minOccurs '$min' found in <element>.")
unless $min =~ /^\d+$/;
$self->{min} = $min;
my $max = _attr($data, 'maxOccurs');
$max = 1 unless defined $max;
_err("Invalid value for maxOccurs '$max' found in <element>.")
unless $max =~ /^\d+$/ or $max eq 'unbounded';
$self->{max} = $max;
return $self;
}
1;
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