| … | |
… | |
| 20 | |
20 | |
| 21 | =cut |
21 | =cut |
| 22 | |
22 | |
| 23 | package XML::DB; |
23 | package XML::DB; |
| 24 | |
24 | |
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25 | use XML::Parser; |
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26 | use PApp::SQL; |
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27 | |
| 25 | #require Exporter; |
28 | #require Exporter; |
| 26 | require DynaLoader; |
29 | BEGIN { |
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30 | $VERSION = 0.01; |
| 27 | |
31 | |
| 28 | $VERSION = 0.01; |
32 | use base DynaLoader; |
| 29 | @ISA = qw/DynaLoader/; |
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| 30 | |
33 | |
| 31 | bootstrap DB $VERSION; |
34 | bootstrap XML::DB $VERSION; |
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35 | } |
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36 | |
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37 | sub new { |
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38 | my $class = shift; |
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39 | bless { @_ }, $class; |
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40 | } |
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41 | |
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42 | sub seq { |
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43 | sql_insertid sql_exec "update $_[0]_seq set n = last_insert_id(n + 1)"; |
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44 | } |
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45 | |
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46 | sub name_id { |
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47 | # not threadsafe |
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48 | sql_ufetch $_[0]{dbh}, "select i from name where n = ? and v = ?", "$_[1]", $_[2] |
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49 | or sql_insertid sql_exec $_[0]{dbh}, "insert into name values (NULL, ?, ?)", "$_[1]", $_[2]; |
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50 | |
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51 | } |
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52 | |
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53 | sub new_xml_insert_parser { |
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54 | my $self = shift; |
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55 | my $dbh = $self->{dbh}; |
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56 | |
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57 | my $did = 55; |
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58 | my $max = 1 + sql_fetch $dbh, "select max(l) from node"; |
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59 | |
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60 | my $n = $max; |
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61 | |
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62 | my @l; |
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63 | my @attr; |
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64 | |
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65 | new XML::Parser |
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66 | Namespaces => 1, |
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67 | NoExpand => 1, |
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68 | Handlers => { |
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69 | Comment => sub { |
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70 | ++$n; |
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71 | sql_exec $dbh, "insert into node values (?, ?, 'comment', NULL)", |
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72 | $n, $n+1; |
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73 | sql_exec $dbh, "insert into value values (?, ?)", |
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74 | $n, $_[1]; |
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75 | ++$n; |
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76 | }, |
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77 | Char => sub { |
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78 | ++$n; |
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79 | sql_exec $dbh, "insert into node values (?, ?, 'pcdata', NULL)", |
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80 | $n, $n+1; |
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81 | sql_exec $dbh, "insert into value values (?, ?)", |
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82 | $n, $_[1]; |
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83 | ++$n; |
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84 | }, |
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85 | Start => sub { |
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86 | my ($parser, $element, @attrs) = @_; |
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87 | push @l, ++$n; |
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88 | push @attr, \@attrs; |
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89 | }, |
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90 | End => sub { |
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91 | my ($parser, $element) = @_; |
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92 | my $attr = pop @attr; |
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93 | my $l = pop @l; |
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94 | sql_exec $dbh, "insert into node values (?, ?, 'element', ?)", |
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95 | $l, ++$n, $self->name_id($parser->namespace($element), $element); |
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96 | |
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97 | for (my $i = 0; $i < @$attr; $i += 2) { |
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98 | sql_exec $dbh, "insert into attr values (?, ?, ?)", |
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99 | $l, $self->name_id($parser->namespace($attr->[$i]), $attr->[$i]), |
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100 | $attr->[$i+1]; |
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101 | } |
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102 | }, |
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103 | Final => sub { |
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104 | sql_exec $dbh, "insert into node values (?, ?, 'root', NULL)", |
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105 | $max*1, ++$n; |
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106 | }, |
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107 | }, |
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108 | @_, |
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109 | ; |
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110 | } |
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111 | |
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112 | sub get_fragment { |
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113 | my ($self, $ol) = @_; |
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114 | |
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115 | my $or = sql_fetch $self->{dbh}, "select r from node where l = ?", $ol; |
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116 | my $st = sql_exec $self->{dbh}, \my($l, $r, $t, $ns, $name, $value), |
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117 | "select node.l, node.r, node.t, name.n, name.v, value.v |
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118 | from node left join name on (node.n = name.i) |
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119 | left join value on (node.l = value.l) |
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120 | where node.l > ? and node.r < ? order by node.l", |
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121 | $ol, $or; |
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122 | |
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123 | my $ot; |
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124 | my @stack; |
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125 | my $doc = ""; |
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126 | my (%nsp, $nsps, $nso); |
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127 | my $nsp = "a"; |
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128 | |
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129 | my $expand_name = sub { |
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130 | $_[0] ? ($nsp{$_[0]} ||= do { |
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131 | $nsps .= " xmlns:$nsp='$_[0]'"; |
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132 | $nsp++; |
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133 | }) . ":$_[1]" |
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134 | : $_[1]; |
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135 | }; |
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136 | |
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137 | while ($st->fetch) { |
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138 | if ($l > $or) { |
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139 | ($ol, $or, $oc) = @{pop @stack}; |
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140 | |
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141 | $doc .= "</$oc>"; |
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142 | } |
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143 | |
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144 | if ($t eq "element") { |
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145 | push @stack, [$ol, $or, $name]; |
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146 | ($ol, $or) = ($l, $r); |
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147 | |
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148 | $doc .= "<" . $expand_name->($ns, $name); |
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149 | $nso ||= length $doc; |
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150 | |
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151 | my $st = sql_exec $self->{dbh}, \my($ns, $name, $value), |
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152 | "select name.n, name.v, attr.v |
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153 | from attr inner join name on (attr.k = name.i) |
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154 | where attr.l = ?", |
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155 | $l; |
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156 | while ($st->fetch) { |
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157 | $doc .= " " . $expand_name->($ns, $name) . "='" . $value ."'"; |
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158 | } |
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159 | |
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160 | $doc .= ">"; |
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161 | } elsif ($t eq "pcdata" or $t eq "comment") { |
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162 | $doc .= $value; |
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163 | } elsif ($t eq "entity") { |
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164 | } elsif ($t eq "pi") { |
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165 | } elsif ($t eq "doctype") { |
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166 | } else { |
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167 | die "FATAL: database corrupt, unexpected nodetype '$t'"; |
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168 | } |
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169 | } |
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170 | |
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171 | substr $doc, $nso, 0, $nsps; |
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172 | $doc; |
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173 | } |
| 32 | |
174 | |
| 33 | 1; |
175 | 1; |
| 34 | |
176 | |
| 35 | |
177 | |
| 36 | |
178 | |
