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
|
package HTTP::OAI::Encapsulation;
use strict;
use warnings;
use HTTP::OAI::SAXHandler qw( :SAX );
use vars qw(@ISA);
@ISA = qw(XML::SAX::Base);
sub new {
my $class = shift;
my %args = @_ > 1 ? @_ : (dom => shift);
my $self = bless {}, ref($class) || $class;
$self->version($args{version});
$self->dom($args{dom});
$self;
}
sub dom { shift->_elem('dom',@_) }
# Pseudo HTTP::Response
sub code { 200 }
sub message { 'OK' }
sub is_info { 0 }
sub is_success { 1 }
sub is_redirect { 0 }
sub is_error { 0 }
sub version { shift->_elem('version',@_) }
sub _elem {
my $self = shift;
my $name = shift;
return @_ ? $self->{_elem}->{$name} = shift : $self->{_elem}->{$name};
}
sub _attr {
my $self = shift;
my $name = shift or return $self->{_attr};
return $self->{_attr}->{$name} unless @_;
if( defined(my $value = shift) ) {
return $self->{_attr}->{$name} = $value;
} else {
delete $self->{_attr}->{$name};
return undef;
}
}
package HTTP::OAI::Encapsulation::DOM;
use strict;
use warnings;
use XML::LibXML qw( :all );
use vars qw(@ISA);
@ISA = qw(HTTP::OAI::Encapsulation);
sub toString { defined($_[0]->dom) ? $_[0]->dom->toString : undef }
sub generate {
my $self = shift;
unless( $self->dom ) {
Carp::confess("Can't generate() without a dom.");
}
unless( $self->dom->nodeType == XML_DOCUMENT_NODE ) {
Carp::confess( "Can only generate() from a DOM of type XML_DOCUMENT_NODE" );
}
return unless defined($self->get_handler);
my $driver = XML::LibXML::SAX::Parser->new(
Handler=>HTTP::OAI::FilterDOMFragment->new(
Handler=>$self->get_handler
));
$driver->generate($self->dom);
}
sub start_document {
my ($self) = @_;
HTTP::OAI::Debug::sax( ref($self) );
my $builder = XML::LibXML::SAX::Builder->new() or die "Unable to create XML::LibXML::SAX::Builder: $!";
$self->{OLDHandler} = $self->get_handler();
$self->set_handler($builder);
$self->SUPER::start_document();
$self->SUPER::xml_decl({'Version'=>'1.0','Encoding'=>'UTF-8'});
}
sub end_document {
my ($self) = @_;
$self->SUPER::end_document();
$self->dom($self->get_handler->result());
$self->set_handler($self->{OLDHandler});
HTTP::OAI::Debug::sax( ref($self) . " <" . $self->dom->documentElement->nodeName . " />" );
}
1;
__END__
=head1 NAME
HTTP::OAI::Encapsulation - Base class for data objects that contain DOM trees
=head1 DESCRIPTION
This class shouldn't be used directly, use L<HTTP::OAI::Metadata>.
=cut
|
