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 |
root |
1.2 |
sub new_xml_insert_parser { |
54 |
root |
1.3 |
my $self = shift; |
55 |
|
|
my $dbh = $self->{dbh}; |
56 |
|
|
|
57 |
root |
1.2 |
my $did = 55; |
58 |
root |
1.4 |
my $max = 1 + sql_fetch $dbh, "select max(l) from node"; |
59 |
|
|
|
60 |
root |
1.5 |
my $n = $max; |
61 |
root |
1.1 |
|
62 |
root |
1.3 |
my @l; |
63 |
|
|
my @attr; |
64 |
root |
1.1 |
|
65 |
root |
1.2 |
new XML::Parser |
66 |
root |
1.3 |
Namespaces => 1, |
67 |
root |
1.2 |
NoExpand => 1, |
68 |
|
|
Handlers => { |
69 |
root |
1.4 |
Comment => sub { |
70 |
|
|
++$n; |
71 |
|
|
sql_exec $dbh, "insert into node values (?, ?, 'comment', NULL)", |
72 |
|
|
$n, $n+1; |
73 |
|
|
sql_exec $dbh, "insert into value values (?, ?)", |
74 |
|
|
$n, $_[1]; |
75 |
|
|
++$n; |
76 |
|
|
}, |
77 |
root |
1.2 |
Char => sub { |
78 |
root |
1.4 |
++$n; |
79 |
|
|
sql_exec $dbh, "insert into node values (?, ?, 'pcdata', NULL)", |
80 |
|
|
$n, $n+1; |
81 |
|
|
sql_exec $dbh, "insert into value values (?, ?)", |
82 |
|
|
$n, $_[1]; |
83 |
|
|
++$n; |
84 |
root |
1.2 |
}, |
85 |
|
|
Start => sub { |
86 |
root |
1.3 |
my ($parser, $element, @attrs) = @_; |
87 |
|
|
push @l, ++$n; |
88 |
|
|
push @attr, \@attrs; |
89 |
root |
1.2 |
}, |
90 |
|
|
End => sub { |
91 |
root |
1.3 |
my ($parser, $element) = @_; |
92 |
|
|
my $attr = pop @attr; |
93 |
|
|
my $l = pop @l; |
94 |
root |
1.4 |
sql_exec $dbh, "insert into node values (?, ?, 'element', ?)", |
95 |
|
|
$l, ++$n, $self->name_id($parser->namespace($element), $element); |
96 |
root |
1.3 |
|
97 |
|
|
for (my $i = 0; $i < @$attr; $i += 2) { |
98 |
root |
1.4 |
sql_exec $dbh, "insert into attr values (?, ?, ?)", |
99 |
|
|
$l, $self->name_id($parser->namespace($attr->[$i]), $attr->[$i]), |
100 |
|
|
$attr->[$i+1]; |
101 |
root |
1.3 |
} |
102 |
|
|
}, |
103 |
|
|
Final => sub { |
104 |
root |
1.4 |
sql_exec $dbh, "insert into node values (?, ?, 'root', NULL)", |
105 |
|
|
$max*1, ++$n; |
106 |
root |
1.2 |
}, |
107 |
|
|
}, |
108 |
|
|
@_, |
109 |
|
|
; |
110 |
root |
1.3 |
} |
111 |
|
|
|
112 |
|
|
sub get_fragment { |
113 |
root |
1.4 |
my ($self, $ol) = @_; |
114 |
root |
1.3 |
|
115 |
root |
1.4 |
my $or = sql_fetch $self->{dbh}, "select r from node where l = ?", $ol; |
116 |
|
|
my $st = sql_exec $self->{dbh}, \my($l, $r, $t, $ns, $name, $value), |
117 |
|
|
"select node.l, node.r, node.t, name.n, name.v, value.v |
118 |
|
|
from node left join name on (node.n = name.i) |
119 |
|
|
left join value on (node.l = value.l) |
120 |
|
|
where node.l > ? and node.r < ? order by node.l", |
121 |
|
|
$ol, $or; |
122 |
root |
1.3 |
|
123 |
|
|
my $ot; |
124 |
|
|
my @stack; |
125 |
|
|
my $doc = ""; |
126 |
root |
1.4 |
my (%nsp, $nsps, $nso); |
127 |
root |
1.3 |
my $nsp = "a"; |
128 |
|
|
|
129 |
|
|
my $expand_name = sub { |
130 |
root |
1.4 |
$_[0] ? ($nsp{$_[0]} ||= do { |
131 |
|
|
$nsps .= " xmlns:$nsp='$_[0]'"; |
132 |
|
|
$nsp++; |
133 |
|
|
}) . ":$_[1]" |
134 |
|
|
: $_[1]; |
135 |
root |
1.3 |
}; |
136 |
|
|
|
137 |
|
|
while ($st->fetch) { |
138 |
|
|
if ($l > $or) { |
139 |
|
|
($ol, $or, $oc) = @{pop @stack}; |
140 |
|
|
|
141 |
|
|
$doc .= "</$oc>"; |
142 |
|
|
} |
143 |
|
|
|
144 |
|
|
if ($t eq "element") { |
145 |
root |
1.4 |
push @stack, [$ol, $or, $name]; |
146 |
root |
1.3 |
($ol, $or) = ($l, $r); |
147 |
|
|
|
148 |
root |
1.4 |
$doc .= "<" . $expand_name->($ns, $name); |
149 |
|
|
$nso ||= length $doc; |
150 |
root |
1.3 |
|
151 |
root |
1.4 |
my $st = sql_exec $self->{dbh}, \my($ns, $name, $value), |
152 |
|
|
"select name.n, name.v, attr.v |
153 |
|
|
from attr inner join name on (attr.k = name.i) |
154 |
|
|
where attr.l = ?", |
155 |
|
|
$l; |
156 |
|
|
while ($st->fetch) { |
157 |
|
|
$doc .= " " . $expand_name->($ns, $name) . "='" . $value ."'"; |
158 |
|
|
} |
159 |
|
|
|
160 |
|
|
$doc .= ">"; |
161 |
|
|
} elsif ($t eq "pcdata" or $t eq "comment") { |
162 |
|
|
$doc .= $value; |
163 |
root |
1.3 |
} elsif ($t eq "entity") { |
164 |
|
|
} elsif ($t eq "pi") { |
165 |
|
|
} elsif ($t eq "doctype") { |
166 |
|
|
} else { |
167 |
|
|
die "FATAL: database corrupt, unexpected nodetype '$t'"; |
168 |
|
|
} |
169 |
|
|
} |
170 |
|
|
|
171 |
root |
1.4 |
substr $doc, $nso, 0, $nsps; |
172 |
root |
1.3 |
$doc; |
173 |
root |
1.2 |
} |
174 |
root |
1.1 |
|
175 |
|
|
1; |
176 |
|
|
|
177 |
|
|
|
178 |
|
|
|
179 |
|
|
|
180 |
|
|
|