1 |
root |
1.1 |
=head1 NAME |
2 |
|
|
|
3 |
|
|
XML::DB - emulate a native xml database using DBI |
4 |
|
|
|
5 |
|
|
=head1 SYNOPSIS |
6 |
|
|
|
7 |
|
|
=head1 DESCRIPTION |
8 |
|
|
|
9 |
|
|
Ehrm... ;) |
10 |
|
|
|
11 |
|
|
=head1 FUNCTIONS |
12 |
|
|
|
13 |
|
|
=head1 SEE ALSO |
14 |
|
|
|
15 |
|
|
=head1 AUTHOR |
16 |
|
|
|
17 |
|
|
This perl extension was written by Marc Lehmann <pcg@goof.com> |
18 |
|
|
|
19 |
|
|
=head1 BUGS |
20 |
|
|
|
21 |
|
|
=cut |
22 |
|
|
|
23 |
|
|
package XML::DB; |
24 |
|
|
|
25 |
root |
1.2 |
use XML::Parser; |
26 |
|
|
use PApp::SQL; |
27 |
|
|
|
28 |
root |
1.1 |
#require Exporter; |
29 |
root |
1.2 |
BEGIN { |
30 |
|
|
$VERSION = 0.01; |
31 |
|
|
|
32 |
|
|
use base DynaLoader; |
33 |
|
|
|
34 |
|
|
bootstrap XML::DB $VERSION; |
35 |
|
|
} |
36 |
|
|
|
37 |
|
|
sub new { |
38 |
|
|
my $class = shift; |
39 |
|
|
bless { @_ }, $class; |
40 |
|
|
} |
41 |
|
|
|
42 |
root |
1.3 |
sub seq { |
43 |
|
|
sql_insertid sql_exec "update $_[0]_seq set n = last_insert_id(n + 1)"; |
44 |
|
|
} |
45 |
|
|
|
46 |
|
|
sub name_id { |
47 |
|
|
# not threadsafe |
48 |
|
|
sql_ufetch $_[0]{dbh}, "select i from name where n = ? and v = ?", "$_[1]", $_[2] |
49 |
|
|
or sql_insertid sql_exec $_[0]{dbh}, "insert into name values (NULL, ?, ?)", "$_[1]", $_[2]; |
50 |
|
|
|
51 |
|
|
} |
52 |
|
|
|
53 |
|
|
sub new_value { |
54 |
|
|
sql_insertid sql_exec $_[0]{dbh}, "insert into value values (NULL, ?)", $_[1]; |
55 |
|
|
} |
56 |
|
|
|
57 |
root |
1.2 |
sub new_xml_insert_parser { |
58 |
root |
1.3 |
my $self = shift; |
59 |
|
|
my $dbh = $self->{dbh}; |
60 |
|
|
|
61 |
root |
1.2 |
my $did = 55; |
62 |
|
|
my $n = 1; |
63 |
root |
1.1 |
|
64 |
root |
1.3 |
my @l; |
65 |
|
|
my @attr; |
66 |
root |
1.1 |
|
67 |
root |
1.2 |
new XML::Parser |
68 |
root |
1.3 |
Namespaces => 1, |
69 |
root |
1.2 |
NoExpand => 1, |
70 |
|
|
Handlers => { |
71 |
|
|
Char => sub { |
72 |
root |
1.3 |
sql_exec $dbh, "insert into node values (?, ?, ?, 'pcdata', ?)", |
73 |
|
|
$did, $n+1, $n+2, $self->new_value($_[1]); |
74 |
|
|
$n += 2; |
75 |
root |
1.2 |
}, |
76 |
|
|
Start => sub { |
77 |
root |
1.3 |
my ($parser, $element, @attrs) = @_; |
78 |
|
|
push @l, ++$n; |
79 |
|
|
push @attr, \@attrs; |
80 |
root |
1.2 |
}, |
81 |
|
|
End => sub { |
82 |
root |
1.3 |
my ($parser, $element) = @_; |
83 |
|
|
my $attr = pop @attr; |
84 |
|
|
my $l = pop @l; |
85 |
|
|
sql_exec $dbh, "insert into node values (?, ?, ?, 'element', ?)", |
86 |
|
|
$did, $l, ++$n, $self->name_id($parser->namespace($element), $element); |
87 |
|
|
|
88 |
|
|
for (my $i = 0; $i < @$attr; $i += 2) { |
89 |
|
|
sql_exec $dbh, "insert into attr values (?, ?, ?, ?)", |
90 |
|
|
$did, $l, $self->name_id($parser->namespace($attr->[$i]), $attr->[$i]), |
91 |
|
|
$self->new_value($attr->[$i+1]); |
92 |
|
|
} |
93 |
|
|
}, |
94 |
|
|
Final => sub { |
95 |
|
|
sql_exec $dbh, "insert into node values (?, ?, ?, 'root', 0)", |
96 |
|
|
$did, 1, ++$n; |
97 |
root |
1.2 |
}, |
98 |
|
|
}, |
99 |
|
|
@_, |
100 |
|
|
; |
101 |
root |
1.3 |
} |
102 |
|
|
|
103 |
|
|
sub get_fragment { |
104 |
|
|
my ($self, $did, $ol) = @_; |
105 |
|
|
|
106 |
|
|
$ol ||= 1; |
107 |
|
|
|
108 |
|
|
my $or = sql_fetch $self->{dbh}, "select r from node where did = ? and l = ?", $did, $ol; |
109 |
|
|
my $st = sql_exec $self->{dbh}, \my($l, $r, $t, $c), |
110 |
|
|
"select l, r, t, c from node where did = ? and l > ? and r < ? order by l", |
111 |
|
|
$did, $ol, $or; |
112 |
|
|
|
113 |
|
|
my $ot; |
114 |
|
|
my @stack; |
115 |
|
|
my $doc = ""; |
116 |
|
|
my %ns; |
117 |
|
|
my $nso; |
118 |
|
|
my $nsp = "a"; |
119 |
|
|
|
120 |
|
|
my $expand_name = sub { |
121 |
|
|
$ns{$_[0]} ||= $nsp++; |
122 |
|
|
}; |
123 |
|
|
|
124 |
|
|
while ($st->fetch) { |
125 |
|
|
if ($l > $or) { |
126 |
|
|
($ol, $or, $oc) = @{pop @stack}; |
127 |
|
|
|
128 |
|
|
$doc .= "</$oc>"; |
129 |
|
|
} |
130 |
|
|
|
131 |
|
|
if ($t eq "element") { |
132 |
|
|
my ($ns, $name) = $expand_name->(sql_ufetch $self->{dbh}, "select ns, v from name where i = ?", $c); |
133 |
|
|
push @stack, [$ol, $or, $ns]; |
134 |
|
|
($ol, $or) = ($l, $r); |
135 |
|
|
|
136 |
|
|
$doc .= "<$ns"; |
137 |
|
|
|
138 |
|
|
my $st = sql_exec $self->{dbh}, "select name.n, , v from |
139 |
|
|
} elsif ($t eq "pcdata") { |
140 |
|
|
$c = sql_ufetch $self->{dbh}, "select v from value where i = ?", $c; |
141 |
|
|
|
142 |
|
|
$doc .= "$c"; |
143 |
|
|
|
144 |
|
|
} elsif ($t eq "entity") { |
145 |
|
|
} elsif ($t eq "pi") { |
146 |
|
|
} elsif ($t eq "doctype") { |
147 |
|
|
} else { |
148 |
|
|
die "FATAL: database corrupt, unexpected nodetype '$t'"; |
149 |
|
|
} |
150 |
|
|
} |
151 |
|
|
|
152 |
|
|
$doc; |
153 |
root |
1.2 |
} |
154 |
root |
1.1 |
|
155 |
|
|
1; |
156 |
|
|
|
157 |
|
|
|
158 |
|
|
|
159 |
|
|
|
160 |
|
|
|