1 package SQL::Translator::Parser::XML::SQLFairy;
3 # -------------------------------------------------------------------
4 # $Id: SQLFairy.pm,v 1.6 2004-07-08 19:06:24 grommit Exp $
5 # -------------------------------------------------------------------
6 # Copyright (C) 2003 Mark Addison <mark.addison@itn.co.uk>,
8 # This program is free software; you can redistribute it and/or
9 # modify it under the terms of the GNU General Public License as
10 # published by the Free Software Foundation; version 2.
12 # This program is distributed in the hope that it will be useful, but
13 # WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 # General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program; if not, write to the Free Software
19 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 # -------------------------------------------------------------------
25 SQL::Translator::Parser::XML::SQLFairy - parser for SQL::Translator's XML.
30 use SQL::Translator::Parser::XML::SQLFairy;
32 my $translator = SQL::Translator->new(
33 from => 'XML-SQLFairy',
35 filename => 'schema.xml',
40 print $obj->translate;
44 This parser handles the flavor of XML used natively by the SQLFairy
45 project (SQL::Translator). The XML must be in the namespace
46 "http://sqlfairy.sourceforge.net/sqlfairy.xml."
47 See L<SQL::Translator::Producer::XML::SQLFairy> for details of this format.
49 You do not need to specify every attribute of the Schema objects as any missing
50 from the XML will be set to their default values. e.g. A field could be written
53 <sqlf:field name="email" data_type="varchar" size="255" />
57 <sqlf:field name="email" data_type="varchar" size="255" is_nullable="1"
58 is_auto_increment="0" is_primary_key="0" is_foreign_key="0" order="4">
59 <sqlf:comments></sqlf:comments>
62 If you do not explicitly set the order of items using order attributes on the
63 tags then the order the tags appear in the XML will be used.
67 Leave the tag out all together to use the default in Schema::Field.
68 Use empty tags or 'EMPTY_STRING' for a zero lenth string. 'NULL' for an
69 explicit null (currently sets default_value to undef in the
72 <sqlf:default_value></sqlf:default_value> <!-- Empty string -->
73 <sqlf:default_value>EMPTY_STRING</sqlf:default_value> <!-- Empty string -->
74 <sqlf:default_value/> <!-- Empty string -->
75 <sqlf:default_value>NULL</sqlf:default_value> <!-- NULL -->
79 Doesn't take any extra parser args at the moment.
83 # -------------------------------------------------------------------
87 use vars qw[ $DEBUG $VERSION @EXPORT_OK ];
88 $VERSION = sprintf "%d.%02d", q$Revision: 1.6 $ =~ /(\d+)\.(\d+)/;
89 $DEBUG = 0 unless defined $DEBUG;
93 use base qw(Exporter);
94 @EXPORT_OK = qw(parse);
96 use base qw/SQL::Translator::Parser/; # Doesnt do anything at the mo!
97 use SQL::Translator::Utils 'debug';
99 use XML::XPath::XMLParser;
102 my ( $translator, $data ) = @_;
103 my $schema = $translator->schema;
104 local $DEBUG = $translator->debug;
105 my $xp = XML::XPath->new(xml => $data);
107 $xp->set_namespace("sqlf", "http://sqlfairy.sourceforge.net/sqlfairy.xml");
110 # Work our way through the tables
112 my @nodes = $xp->findnodes('/sqlf:schema/sqlf:table');
115 "".$xp->findvalue('sqlf:order|@order',$a)
117 "".$xp->findvalue('sqlf:order|@order',$b)
120 debug "Adding table:".$xp->findvalue('sqlf:name',$tblnode);
122 my $table = $schema->add_table(
123 get_tagfields($xp, $tblnode, "sqlf:" => qw/name order/)
124 ) or die $schema->error;
129 my @nodes = $xp->findnodes('sqlf:fields/sqlf:field',$tblnode);
132 ("".$xp->findvalue('sqlf:order',$a) || 0)
134 ("".$xp->findvalue('sqlf:order',$b) || 0)
137 my %fdata = get_tagfields($xp, $_, "sqlf:",
138 qw/name data_type size default_value is_nullable
139 is_auto_increment is_primary_key is_foreign_key comments/
143 exists $fdata{'default_value'} and
144 defined $fdata{'default_value'}
146 if ( $fdata{'default_value'} =~ /^\s*NULL\s*$/ ) {
147 $fdata{'default_value'}= undef;
149 elsif ( $fdata{'default_value'} =~ /^\s*EMPTY_STRING\s*$/ ) {
150 $fdata{'default_value'} = "";
154 my $field = $table->add_field( %fdata ) or die $table->error;
156 $table->primary_key( $field->name ) if $fdata{'is_primary_key'};
160 # - We should be able to make the table obj spot this when
162 # - Deal with $field->extra
169 @nodes = $xp->findnodes('sqlf:constraints/sqlf:constraint',$tblnode);
171 my %data = get_tagfields($xp, $_, "sqlf:",
172 qw/name type table fields reference_fields reference_table
173 match_type on_delete_do on_update_do/
175 $table->add_constraint( %data ) or die $table->error;
181 @nodes = $xp->findnodes('sqlf:indices/sqlf:index',$tblnode);
183 my %data = get_tagfields($xp, $_, "sqlf:",
184 qw/name type fields options/);
185 $table->add_index( %data ) or die $table->error;
193 @nodes = $xp->findnodes('/sqlf:schema/sqlf:view');
195 my %data = get_tagfields($xp, $_, "sqlf:",
196 qw/name sql fields order/
198 $schema->add_view( %data ) or die $schema->error;
204 @nodes = $xp->findnodes('/sqlf:schema/sqlf:trigger');
206 my %data = get_tagfields($xp, $_, "sqlf:",
207 qw/name perform_action_when database_event fields on_table action order/
209 $schema->add_trigger( %data ) or die $schema->error;
215 @nodes = $xp->findnodes('/sqlf:schema/sqlf:procedure');
217 my %data = get_tagfields($xp, $_, "sqlf:",
218 qw/name sql parameters owner comments order/
220 $schema->add_procedure( %data ) or die $schema->error;
226 # -------------------------------------------------------------------
229 # get_tagfields XP, NODE, NAMESPACE => qw/TAGNAMES/;
230 # get_tagfields $node, "sqlf:" => qw/name type fields reference/;
232 # Returns hash of data.
233 # TODO - Add handling of an explicit NULL value.
236 my ($xp, $node, @names) = @_;
239 if ( m/:$/ ) { $ns = $_; next; } # Set def namespace
240 my $thisns = (s/(^.*?:)// ? $1 : $ns);
242 my $is_attrib = m/^sql|comments|action$/ ? 0 : 1;
244 my $attrib_path = "\@$thisns$_";
245 my $tag_path = "$thisns$_";
246 if ( $xp->exists($attrib_path,$node) ) {
247 $data{$_} = "".$xp->findvalue($attrib_path,$node);
248 warn "Use of '$_' as an attribute is depricated."
249 ." Use a child tag instead."
250 ." To convert your file to the new version see the Docs.\n"
252 debug "Got $_=".( defined $data{ $_ } ? $data{ $_ } : 'UNDEF' );
254 elsif ( $xp->exists($tag_path,$node) ) {
255 $data{$_} = "".$xp->findvalue($tag_path,$node);
256 warn "Use of '$_' as a child tag is depricated."
257 ." Use an attribute instead."
258 ." To convert your file to the new version see the Docs.\n"
260 debug "Got $_=".( defined $data{ $_ } ? $data{ $_ } : 'UNDEF' );
264 return wantarray ? %data : \%data;
269 # -------------------------------------------------------------------
275 Ignores the order attribute for Constraints, Views, Indices,
276 Views, Triggers and Procedures, using the tag order instead. (This is the order
277 output by the SQLFairy XML producer).
285 Support options and extra attributes.
289 Test foreign keys are parsed ok.
293 Control over defaulting of non-existant tags.
299 Mark D. Addison E<lt>mark.addison@itn.co.ukE<gt>.
303 perl(1), SQL::Translator, SQL::Translator::Producer::XML::SQLFairy,
304 SQL::Translator::Schema.