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1 | package SQL::Translator::Producer::GraphViz; |
2 | |
3 | # ------------------------------------------------------------------- |
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4 | # $Id: GraphViz.pm,v 1.14 2007-09-26 13:20:09 schiffbruechige Exp $ |
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5 | # ------------------------------------------------------------------- |
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6 | # Copyright (C) 2002-4 SQLFairy Authors |
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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 | |
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23 | =pod |
24 | |
25 | =head1 NAME |
26 | |
27 | SQL::Translator::Producer::GraphViz - GraphViz producer for SQL::Translator |
28 | |
29 | =head1 SYNOPSIS |
30 | |
31 | use SQL::Translator; |
32 | |
33 | my $trans = new SQL::Translator( |
34 | from => 'MySQL', # or your db of choice |
35 | to => 'GraphViz', |
36 | producer_args => { |
37 | out_file => 'schema.png', |
38 | add_color => 1, |
39 | show_constraints => 1, |
40 | show_datatypes => 1, |
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41 | show_sizes => 1 |
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42 | } |
43 | ) or die SQL::Translator->error; |
44 | |
45 | $trans->translate or die $trans->error; |
46 | |
47 | =head1 DESCRIPTION |
48 | |
49 | Creates a graph of a schema using the amazing graphviz |
50 | (see http://www.graphviz.org/) application (via |
51 | the GraphViz module). It's nifty--you should try it! |
52 | |
53 | =head1 PRODUCER ARGS |
54 | |
55 | =over 4 |
56 | |
57 | =item * out_file |
58 | |
59 | the name of the file where the graphviz graphic is to be written |
60 | |
61 | =item * layout (DEFAULT: 'dot') |
62 | |
63 | determines which layout algorithm GraphViz will use; possible |
64 | values are 'dot' (the default GraphViz layout for directed graph |
65 | layouts), 'neato' (for undirected graph layouts - spring model) |
66 | or 'twopi' (for undirected graph layouts - circular) |
67 | |
68 | =item * node_shape (DEFAULT: 'record') |
69 | |
70 | sets the node shape of each table in the graph; this can be |
71 | one of 'record', 'plaintext', 'ellipse', 'circle', 'egg', |
72 | 'triangle', 'box', 'diamond', 'trapezium', 'parallelogram', |
73 | 'house', 'hexagon', or 'octagon' |
74 | |
75 | =item * output_type (DEFAULT: 'png') |
76 | |
77 | sets the file type of the output graphic; possible values are |
78 | 'ps', 'hpgl', 'pcl', 'mif', 'pic', 'gd', 'gd2', 'gif', 'jpeg', |
79 | 'png', 'wbmp', 'cmap', 'ismap', 'imap', 'vrml', 'vtx', 'mp', |
80 | 'fig', 'svg', 'canon', 'plain' or 'text' (see GraphViz for |
81 | details on each of these) |
82 | |
83 | =item * width (DEFAULT: 8.5) |
84 | |
85 | width (in inches) of the output graphic |
86 | |
87 | =item * height (DEFAULT: 11) |
88 | |
89 | height (in inches) of the output grahic |
90 | |
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91 | =item * fontsize |
92 | |
93 | custom font size for node and edge labels (note that arbitrarily large |
94 | sizes may be ignored due to page size or graph size constraints) |
95 | |
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96 | =item * fontname |
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97 | |
98 | custom font name (or full path to font file) for node, edge, and graph |
99 | labels |
100 | |
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101 | =item * nodeattrs |
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102 | |
103 | reference to a hash of node attribute names and their values; these |
104 | may override general fontname or fontsize parameter |
105 | |
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106 | =item * edgeattrs |
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107 | |
108 | reference to a hash of edge attribute names and their values; these |
109 | may override general fontname or fontsize parameter |
110 | |
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111 | =item * graphattrs |
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112 | |
113 | reference to a hash of graph attribute names and their values; these |
114 | may override the general fontname parameter |
115 | |
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116 | =item * show_fields (DEFAULT: true) |
117 | |
118 | if set to a true value, the names of the colums in a table will |
119 | be displayed in each table's node |
120 | |
121 | =item * show_fk_only |
122 | |
123 | if set to a true value, only columns which are foreign keys |
124 | will be displayed in each table's node |
125 | |
126 | =item * show_datatypes |
127 | |
128 | if set to a true value, the datatype of each column will be |
129 | displayed next to each column's name; this option will have no |
130 | effect if the value of show_fields is set to false |
131 | |
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132 | =item * show_sizes |
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133 | |
134 | if set to a true value, the size (in bytes) of each CHAR and |
135 | VARCHAR column will be displayed in parentheses next to the |
136 | column's name; this option will have no effect if the value of |
137 | show_fields is set to false |
138 | |
139 | =item * show_constraints |
140 | |
141 | if set to a true value, a field's constraints (i.e., its |
142 | primary-key-ness, its foreign-key-ness and/or its uniqueness) |
143 | will appear as a comma-separated list in brackets next to the |
144 | field's name; this option will have no effect if the value of |
145 | show_fields is set to false |
146 | |
147 | =item * add_color |
148 | |
149 | if set to a true value, the graphic will have a background |
150 | color of 'lightgoldenrodyellow'; otherwise the background |
151 | color will be white |
152 | |
153 | =item * natural_join |
154 | |
155 | if set to a true value, the make_natural_join method of |
156 | SQL::Translator::Schema will be called before generating the |
157 | graph; a true value for join_pk_only (see below) implies a |
158 | true value for this option |
159 | |
160 | =item * join_pk_only |
161 | |
162 | the value of this option will be passed as the value of the |
163 | like-named argument in the make_natural_join method (see |
164 | natural_join above) of SQL::Translator::Schema, if either the |
165 | value of this option or the natural_join option is set to true |
166 | |
167 | =item * skip_fields |
168 | |
169 | the value of this option will be passed as the value of the |
170 | like-named argument in the make_natural_join method (see |
171 | natural_join above) of SQL::Translator::Schema, if either |
172 | the natural_join or join_pk_only options has a true value |
173 | |
174 | =back |
175 | |
176 | =cut |
177 | |
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178 | use strict; |
179 | use GraphViz; |
180 | use Data::Dumper; |
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181 | use SQL::Translator::Schema::Constants; |
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182 | use SQL::Translator::Utils qw(debug); |
183 | |
184 | use vars qw[ $VERSION $DEBUG ]; |
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185 | $VERSION = sprintf "%d.%02d", q$Revision: 1.14 $ =~ /(\d+)\.(\d+)/; |
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186 | $DEBUG = 0 unless defined $DEBUG; |
187 | |
188 | use constant VALID_LAYOUT => { |
189 | dot => 1, |
190 | neato => 1, |
191 | twopi => 1, |
192 | }; |
193 | |
194 | use constant VALID_NODE_SHAPE => { |
195 | record => 1, |
196 | plaintext => 1, |
197 | ellipse => 1, |
198 | circle => 1, |
199 | egg => 1, |
200 | triangle => 1, |
201 | box => 1, |
202 | diamond => 1, |
203 | trapezium => 1, |
204 | parallelogram => 1, |
205 | house => 1, |
206 | hexagon => 1, |
207 | octagon => 1, |
208 | }; |
209 | |
210 | use constant VALID_OUTPUT => { |
211 | canon => 1, |
212 | text => 1, |
213 | ps => 1, |
214 | hpgl => 1, |
215 | pcl => 1, |
216 | mif => 1, |
217 | pic => 1, |
218 | gd => 1, |
219 | gd2 => 1, |
220 | gif => 1, |
221 | jpeg => 1, |
222 | png => 1, |
223 | wbmp => 1, |
224 | cmap => 1, |
225 | ismap => 1, |
226 | imap => 1, |
227 | vrml => 1, |
228 | vtx => 1, |
229 | mp => 1, |
230 | fig => 1, |
231 | svg => 1, |
232 | plain => 1, |
233 | }; |
234 | |
235 | sub produce { |
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236 | my $t = shift; |
237 | my $schema = $t->schema; |
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238 | my $args = $t->producer_args; |
239 | local $DEBUG = $t->debug; |
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240 | |
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241 | my $out_file = $args->{'out_file'} || ''; |
242 | my $layout = $args->{'layout'} || 'dot'; |
243 | my $node_shape = $args->{'node_shape'} || 'record'; |
244 | my $output_type = $args->{'output_type'} || 'png'; |
245 | my $width = defined $args->{'width'} |
246 | ? $args->{'width'} : 8.5; |
247 | my $height = defined $args->{'height'} |
248 | ? $args->{'height'} : 11; |
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249 | my $fontsize = $args->{'fontsize'}; |
250 | my $fontname = $args->{'fontname'}; |
251 | my $edgeattrs = $args->{'edgeattrs'} || {}; |
252 | my $graphattrs = $args->{'graphattrs'} || {}; |
253 | my $nodeattrs = $args->{'nodeattrs'} || {}; |
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254 | my $show_fields = defined $args->{'show_fields'} |
255 | ? $args->{'show_fields'} : 1; |
256 | my $add_color = $args->{'add_color'}; |
257 | my $natural_join = $args->{'natural_join'}; |
258 | my $show_fk_only = $args->{'show_fk_only'}; |
259 | my $show_datatypes = $args->{'show_datatypes'}; |
260 | my $show_sizes = $args->{'show_sizes'}; |
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261 | my $show_constraints = $args->{'show_constraints'}; |
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262 | my $join_pk_only = $args->{'join_pk_only'}; |
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263 | my $skip_fields = $args->{'skip_fields'} || ''; |
264 | my %skip = map { s/^\s+|\s+$//g; length $_ ? ($_, 1) : () } |
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265 | split ( /,/, $skip_fields ); |
266 | $natural_join ||= $join_pk_only; |
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267 | |
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268 | $schema->make_natural_joins( |
269 | join_pk_only => $join_pk_only, |
270 | skip_fields => $args->{'skip_fields'}, |
271 | ) if $natural_join; |
272 | |
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273 | die "Invalid layout '$layout'" unless VALID_LAYOUT->{ $layout }; |
274 | die "Invalid output type: '$output_type'" |
275 | unless VALID_OUTPUT->{ $output_type }; |
276 | die "Invalid node shape'$node_shape'" |
277 | unless VALID_NODE_SHAPE->{ $node_shape }; |
278 | |
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279 | for ( $height, $width ) { |
280 | $_ = 0 unless $_ =~ /^\d+(.\d)?$/; |
281 | $_ = 0 if $_ < 0; |
282 | } |
283 | |
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284 | # |
285 | # Create GraphViz and see if we can produce the output type. |
286 | # |
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287 | my %args = ( |
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288 | directed => $natural_join ? 0 : 1, |
289 | layout => $layout, |
290 | no_overlap => 1, |
291 | bgcolor => $add_color ? 'lightgoldenrodyellow' : 'white', |
292 | node => { |
293 | shape => $node_shape, |
294 | style => 'filled', |
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295 | fillcolor => 'white', |
296 | }, |
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297 | ); |
298 | $args{'width'} = $width if $width; |
299 | $args{'height'} = $height if $height; |
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300 | # set fontsize for edge and node labels if specified |
301 | if ($fontsize) { |
302 | $args{'node'}->{'fontsize'} = $fontsize; |
303 | $args{'edge'} = {} unless $args{'edge'}; |
304 | $args{'edge'}->{'fontsize'} = $fontsize; |
305 | } |
306 | # set the font name globally for node, edge, and graph labels if |
307 | # specified (use node, edge, or graph attributes for individual |
308 | # font specification) |
309 | if ($fontname) { |
310 | $args{'node'}->{'fontname'} = $fontname; |
311 | $args{'edge'} = {} unless $args{'edge'}; |
312 | $args{'edge'}->{'fontname'} = $fontname; |
313 | $args{'graph'} = {} unless $args{'graph'}; |
314 | $args{'graph'}->{'fontname'} = $fontname; |
315 | } |
316 | # set additional node, edge, and graph attributes; these may |
317 | # possibly override ones set before |
318 | while (my ($key,$val) = each %$nodeattrs) { |
319 | $args{'node'}->{$key} = $val; |
320 | } |
321 | $args{'edge'} = {} if %$edgeattrs && !$args{'edge'}; |
322 | while (my ($key,$val) = each %$edgeattrs) { |
323 | $args{'edge'}->{$key} = $val; |
324 | } |
325 | $args{'graph'} = {} if %$edgeattrs && !$args{'graph'}; |
326 | while (my ($key,$val) = each %$graphattrs) { |
327 | $args{'graph'}->{$key} = $val; |
328 | } |
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329 | |
330 | my $gv = GraphViz->new( %args ) or die "Can't create GraphViz object\n"; |
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331 | |
332 | my %nj_registry; # for locations of fields for natural joins |
333 | my @fk_registry; # for locations of fields for foreign keys |
334 | |
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335 | for my $table ( $schema->get_tables ) { |
336 | my $table_name = $table->name; |
337 | my @fields = $table->get_fields; |
338 | if ( $show_fk_only ) { |
339 | @fields = grep { $_->is_foreign_key } @fields; |
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340 | } |
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341 | |
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342 | my $field_str = join( |
343 | '\l', |
344 | map { |
345 | '-\ ' |
346 | . $_->name |
347 | . ( $show_datatypes ? '\ ' . $_->data_type : '') |
348 | . ( $show_sizes && ! $show_datatypes ? '\ ' : '') |
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349 | . ( $show_sizes && $_->data_type =~ /^(VAR)?CHAR2?$/i ? '(' . $_->size . ')' : '') |
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350 | . ( $show_constraints ? |
351 | ( $_->is_primary_key || $_->is_foreign_key || $_->is_unique ? '\ [' : '' ) |
352 | . ( $_->is_primary_key ? 'PK' : '' ) |
353 | . ( $_->is_primary_key && ($_->is_foreign_key || $_->is_unique) ? ',' : '' ) |
354 | . ( $_->is_foreign_key ? 'FK' : '' ) |
355 | . ( $_->is_unique && ($_->is_primary_key || $_->is_foreign_key) ? ',' : '' ) |
356 | . ( $_->is_unique ? 'U' : '' ) |
357 | . ( $_->is_primary_key || $_->is_foreign_key || $_->is_unique ? ']' : '' ) |
358 | : '' ) |
359 | . '\ ' |
360 | } @fields |
361 | ) . '\l'; |
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362 | my $label = $show_fields ? "{$table_name|$field_str}" : $table_name; |
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363 | # $gv->add_node( $table_name, label => $label ); |
364 | $gv->add_node( $table_name, label => $label, ($node_shape eq 'record' ? ( shape => $node_shape ) : ()) ); |
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365 | debug("Processing table '$table_name'"); |
366 | |
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367 | debug("Fields = ", join(', ', map { $_->name } @fields)); |
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368 | |
369 | for my $f ( @fields ) { |
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370 | my $name = $f->name or next; |
371 | my $is_pk = $f->is_primary_key; |
372 | my $is_unique = $f->is_unique; |
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373 | |
374 | # |
375 | # Decide if we should skip this field. |
376 | # |
377 | if ( $natural_join ) { |
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378 | next unless $is_pk || $f->is_foreign_key; |
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379 | } |
380 | |
381 | my $constraints = $f->{'constraints'}; |
382 | |
383 | if ( $natural_join && !$skip{ $name } ) { |
384 | push @{ $nj_registry{ $name } }, $table_name; |
385 | } |
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386 | } |
387 | |
388 | unless ( $natural_join ) { |
389 | for my $c ( $table->get_constraints ) { |
390 | next unless $c->type eq FOREIGN_KEY; |
391 | my $fk_table = $c->reference_table or next; |
392 | |
393 | for my $field_name ( $c->fields ) { |
394 | for my $fk_field ( $c->reference_fields ) { |
395 | next unless defined $schema->get_table( $fk_table ); |
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396 | push @fk_registry, [ $table_name, $fk_table ]; |
397 | } |
398 | } |
399 | } |
400 | } |
401 | } |
402 | |
403 | # |
404 | # Make the connections. |
405 | # |
406 | my @table_bunches; |
407 | if ( $natural_join ) { |
408 | for my $field_name ( keys %nj_registry ) { |
409 | my @table_names = @{ $nj_registry{ $field_name } || [] } or next; |
410 | next if scalar @table_names == 1; |
411 | push @table_bunches, [ @table_names ]; |
412 | } |
413 | } |
414 | else { |
415 | @table_bunches = @fk_registry; |
416 | } |
417 | |
418 | my %done; |
419 | for my $bunch ( @table_bunches ) { |
420 | my @tables = @$bunch; |
421 | |
422 | for my $i ( 0 .. $#tables ) { |
423 | my $table1 = $tables[ $i ]; |
424 | for my $j ( 0 .. $#tables ) { |
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425 | next if $i == $j; |
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426 | my $table2 = $tables[ $j ]; |
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427 | next if $done{ $table1 }{ $table2 }; |
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428 | $gv->add_edge( $table2, $table1 ); |
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429 | $done{ $table1 }{ $table2 } = 1; |
430 | $done{ $table2 }{ $table1 } = 1; |
431 | } |
432 | } |
433 | } |
434 | |
435 | # |
436 | # Print the image. |
437 | # |
438 | my $output_method = "as_$output_type"; |
439 | if ( $out_file ) { |
440 | open my $fh, ">$out_file" or die "Can't write '$out_file': $!\n"; |
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441 | binmode $fh; |
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442 | print $fh $gv->$output_method; |
443 | close $fh; |
444 | } |
445 | else { |
446 | return $gv->$output_method; |
447 | } |
448 | } |
449 | |
450 | 1; |
451 | |
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452 | # ------------------------------------------------------------------- |
453 | |
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454 | =pod |
455 | |
14d7eb56 |
456 | =head1 AUTHOR |
457 | |
458 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt> |
459 | |
d491c962 |
460 | =head1 SEE ALSO |
461 | |
462 | SQL::Translator, GraphViz |
463 | |
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464 | =cut |