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1 | package SQL::Translator::Producer::GraphViz; |
2 | |
3 | # ------------------------------------------------------------------- |
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4 | # $Id: GraphViz.pm,v 1.5 2003-06-09 04:54:15 kycl4rk Exp $ |
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5 | # ------------------------------------------------------------------- |
6 | # Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org> |
7 | # |
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. |
11 | # |
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. |
16 | # |
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 |
20 | # 02111-1307 USA |
21 | # ------------------------------------------------------------------- |
22 | |
23 | use strict; |
24 | use GraphViz; |
25 | use Data::Dumper; |
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26 | use SQL::Translator::Schema::Constants; |
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27 | use SQL::Translator::Utils qw(debug); |
28 | |
29 | use vars qw[ $VERSION $DEBUG ]; |
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30 | $VERSION = sprintf "%d.%02d", q$Revision: 1.5 $ =~ /(\d+)\.(\d+)/; |
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31 | $DEBUG = 0 unless defined $DEBUG; |
32 | |
33 | use constant VALID_LAYOUT => { |
34 | dot => 1, |
35 | neato => 1, |
36 | twopi => 1, |
37 | }; |
38 | |
39 | use constant VALID_NODE_SHAPE => { |
40 | record => 1, |
41 | plaintext => 1, |
42 | ellipse => 1, |
43 | circle => 1, |
44 | egg => 1, |
45 | triangle => 1, |
46 | box => 1, |
47 | diamond => 1, |
48 | trapezium => 1, |
49 | parallelogram => 1, |
50 | house => 1, |
51 | hexagon => 1, |
52 | octagon => 1, |
53 | }; |
54 | |
55 | use constant VALID_OUTPUT => { |
56 | canon => 1, |
57 | text => 1, |
58 | ps => 1, |
59 | hpgl => 1, |
60 | pcl => 1, |
61 | mif => 1, |
62 | pic => 1, |
63 | gd => 1, |
64 | gd2 => 1, |
65 | gif => 1, |
66 | jpeg => 1, |
67 | png => 1, |
68 | wbmp => 1, |
69 | cmap => 1, |
70 | ismap => 1, |
71 | imap => 1, |
72 | vrml => 1, |
73 | vtx => 1, |
74 | mp => 1, |
75 | fig => 1, |
76 | svg => 1, |
77 | plain => 1, |
78 | }; |
79 | |
80 | sub produce { |
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81 | my $t = shift; |
82 | my $schema = $t->schema; |
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83 | my $args = $t->producer_args; |
84 | local $DEBUG = $t->debug; |
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85 | |
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86 | my $out_file = $args->{'out_file'} || ''; |
87 | my $layout = $args->{'layout'} || 'neato'; |
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88 | my $node_shape = $args->{'node_shape'} || 'record'; |
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89 | my $output_type = $args->{'output_type'} || 'png'; |
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90 | my $width = defined $args->{'width'} |
91 | ? $args->{'width'} : 8.5; |
92 | my $height = defined $args->{'height'} |
93 | ? $args->{'height'} : 11; |
94 | my $show_fields = defined $args->{'show_fields'} |
95 | ? $args->{'show_fields'} : 1; |
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96 | my $add_color = $args->{'add_color'}; |
97 | my $natural_join = $args->{'natural_join'}; |
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98 | my $show_fk_only = $args->{'show_fk_only'}; |
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99 | my $join_pk_only = $args->{'join_pk_only'}; |
100 | my $skip_fields = $args->{'skip_fields'}; |
101 | my %skip = map { s/^\s+|\s+$//g; $_, 1 } |
102 | split ( /,/, $skip_fields ); |
103 | $natural_join ||= $join_pk_only; |
104 | |
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105 | $schema->make_natural_joins( |
106 | join_pk_only => $join_pk_only, |
107 | skip_fields => $args->{'skip_fields'}, |
108 | ) if $natural_join; |
109 | |
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110 | die "Invalid layout '$layout'" unless VALID_LAYOUT->{ $layout }; |
111 | die "Invalid output type: '$output_type'" |
112 | unless VALID_OUTPUT->{ $output_type }; |
113 | die "Invalid node shape'$node_shape'" |
114 | unless VALID_NODE_SHAPE->{ $node_shape }; |
115 | |
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116 | for ( $height, $width ) { |
117 | $_ = 0 unless $_ =~ /^\d+(.\d)?$/; |
118 | $_ = 0 if $_ < 0; |
119 | } |
120 | |
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121 | # |
122 | # Create GraphViz and see if we can produce the output type. |
123 | # |
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124 | my %args = ( |
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125 | directed => $natural_join ? 0 : 1, |
126 | layout => $layout, |
127 | no_overlap => 1, |
128 | bgcolor => $add_color ? 'lightgoldenrodyellow' : 'white', |
129 | node => { |
130 | shape => $node_shape, |
131 | style => 'filled', |
132 | fillcolor => 'white' |
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133 | } |
134 | ); |
135 | $args{'width'} = $width if $width; |
136 | $args{'height'} = $height if $height; |
137 | |
138 | my $gv = GraphViz->new( %args ) or die "Can't create GraphViz object\n"; |
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139 | |
140 | my %nj_registry; # for locations of fields for natural joins |
141 | my @fk_registry; # for locations of fields for foreign keys |
142 | |
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143 | for my $table ( $schema->get_tables ) { |
144 | my $table_name = $table->name; |
145 | my @fields = $table->get_fields; |
146 | if ( $show_fk_only ) { |
147 | @fields = grep { $_->is_foreign_key } @fields; |
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148 | } |
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149 | |
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150 | my $field_str = join('\l', map { $_->name } @fields); |
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151 | my $label = $show_fields ? "{$table_name|$field_str}" : $table_name; |
152 | $gv->add_node( $table_name, label => $label ); |
153 | |
154 | debug("Processing table '$table_name'"); |
155 | |
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156 | debug("Fields = ", join(', ', map { $_->name } @fields)); |
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157 | |
158 | for my $f ( @fields ) { |
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159 | my $name = $f->name or next; |
160 | my $is_pk = $f->is_primary_key; |
161 | my $is_unique = $f->is_unique; |
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162 | |
163 | # |
164 | # Decide if we should skip this field. |
165 | # |
166 | if ( $natural_join ) { |
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167 | next unless $is_pk || $f->is_foreign_key; |
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168 | } |
169 | |
170 | my $constraints = $f->{'constraints'}; |
171 | |
172 | if ( $natural_join && !$skip{ $name } ) { |
173 | push @{ $nj_registry{ $name } }, $table_name; |
174 | } |
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175 | } |
176 | |
177 | unless ( $natural_join ) { |
178 | for my $c ( $table->get_constraints ) { |
179 | next unless $c->type eq FOREIGN_KEY; |
180 | my $fk_table = $c->reference_table or next; |
181 | |
182 | for my $field_name ( $c->fields ) { |
183 | for my $fk_field ( $c->reference_fields ) { |
184 | next unless defined $schema->get_table( $fk_table ); |
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185 | push @fk_registry, [ $table_name, $fk_table ]; |
186 | } |
187 | } |
188 | } |
189 | } |
190 | } |
191 | |
192 | # |
193 | # Make the connections. |
194 | # |
195 | my @table_bunches; |
196 | if ( $natural_join ) { |
197 | for my $field_name ( keys %nj_registry ) { |
198 | my @table_names = @{ $nj_registry{ $field_name } || [] } or next; |
199 | next if scalar @table_names == 1; |
200 | push @table_bunches, [ @table_names ]; |
201 | } |
202 | } |
203 | else { |
204 | @table_bunches = @fk_registry; |
205 | } |
206 | |
207 | my %done; |
208 | for my $bunch ( @table_bunches ) { |
209 | my @tables = @$bunch; |
210 | |
211 | for my $i ( 0 .. $#tables ) { |
212 | my $table1 = $tables[ $i ]; |
213 | for my $j ( 0 .. $#tables ) { |
214 | my $table2 = $tables[ $j ]; |
215 | next if $table1 eq $table2; |
216 | next if $done{ $table1 }{ $table2 }; |
217 | $gv->add_edge( $table1, $table2 ); |
218 | $done{ $table1 }{ $table2 } = 1; |
219 | $done{ $table2 }{ $table1 } = 1; |
220 | } |
221 | } |
222 | } |
223 | |
224 | # |
225 | # Print the image. |
226 | # |
227 | my $output_method = "as_$output_type"; |
228 | if ( $out_file ) { |
229 | open my $fh, ">$out_file" or die "Can't write '$out_file': $!\n"; |
230 | print $fh $gv->$output_method; |
231 | close $fh; |
232 | } |
233 | else { |
234 | return $gv->$output_method; |
235 | } |
236 | } |
237 | |
238 | 1; |
239 | |
240 | =pod |
241 | |
242 | =head1 NAME |
243 | |
244 | SQL::Translator::Producer::GraphViz - GraphViz producer for SQL::Translator |
245 | |
246 | =head1 AUTHOR |
247 | |
248 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt> |
249 | |
250 | =cut |