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1 | package SQL::Translator; |
2 | |
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3 | # ---------------------------------------------------------------------- |
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4 | # Copyright (C) 2002-2009 The SQLFairy Authors |
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5 | # |
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6 | # This program is free software; you can redistribute it and/or |
7 | # modify it under the terms of the GNU General Public License as |
8 | # published by the Free Software Foundation; version 2. |
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9 | # |
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10 | # This program is distributed in the hope that it will be useful, but |
11 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | # General Public License for more details. |
ca10f295 |
14 | # |
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15 | # You should have received a copy of the GNU General Public License |
16 | # along with this program; if not, write to the Free Software |
17 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
18 | # 02111-1307 USA |
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19 | # ------------------------------------------------------------------- |
20 | |
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21 | use strict; |
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22 | use vars qw( $VERSION $DEFAULT_SUB $DEBUG $ERROR ); |
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23 | use base 'Class::Base'; |
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24 | |
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25 | require 5.005; |
4b6a6341 |
26 | |
c1e2579f |
27 | $VERSION = '0.09006'; |
d529894e |
28 | $DEBUG = 0 unless defined $DEBUG; |
29 | $ERROR = ""; |
c2d3a526 |
30 | |
31 | use Carp qw(carp); |
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32 | |
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33 | use Data::Dumper; |
3015bf96 |
34 | use File::Find; |
c0c4aef9 |
35 | use File::Spec::Functions qw(catfile); |
36 | use File::Basename qw(dirname); |
37 | use IO::Dir; |
3edb144c |
38 | use SQL::Translator::Producer; |
45ee6be0 |
39 | use SQL::Translator::Schema; |
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40 | |
b346d8f1 |
41 | # ---------------------------------------------------------------------- |
42 | # The default behavior is to "pass through" values (note that the |
43 | # SQL::Translator instance is the first value ($_[0]), and the stuff |
44 | # to be parsed is the second value ($_[1]) |
45 | # ---------------------------------------------------------------------- |
05a56b57 |
46 | $DEFAULT_SUB = sub { $_[0]->schema } unless defined $DEFAULT_SUB; |
16dc9970 |
47 | |
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48 | # ---------------------------------------------------------------------- |
c2d3a526 |
49 | # init([ARGS]) |
b346d8f1 |
50 | # The constructor. |
dfb4c915 |
51 | # |
b346d8f1 |
52 | # new takes an optional hash of arguments. These arguments may |
53 | # include a parser, specified with the keys "parser" or "from", |
54 | # and a producer, specified with the keys "producer" or "to". |
dfb4c915 |
55 | # |
b346d8f1 |
56 | # The values that can be passed as the parser or producer are |
57 | # given directly to the parser or producer methods, respectively. |
58 | # See the appropriate method description below for details about |
59 | # what each expects/accepts. |
b346d8f1 |
60 | # ---------------------------------------------------------------------- |
c2d3a526 |
61 | sub init { |
49e1eb70 |
62 | my ( $self, $config ) = @_; |
49e1eb70 |
63 | # |
b346d8f1 |
64 | # Set the parser and producer. |
ca10f295 |
65 | # |
b346d8f1 |
66 | # If a 'parser' or 'from' parameter is passed in, use that as the |
67 | # parser; if a 'producer' or 'to' parameter is passed in, use that |
68 | # as the producer; both default to $DEFAULT_SUB. |
49e1eb70 |
69 | # |
70 | $self->parser ($config->{'parser'} || $config->{'from'} || $DEFAULT_SUB); |
c2d3a526 |
71 | $self->producer($config->{'producer'} || $config->{'to'} || $DEFAULT_SUB); |
ca10f295 |
72 | |
10f36920 |
73 | # |
74 | # Set up callbacks for formatting of pk,fk,table,package names in producer |
75 | # MOVED TO PRODUCER ARGS |
76 | # |
77 | #$self->format_table_name($config->{'format_table_name'}); |
78 | #$self->format_package_name($config->{'format_package_name'}); |
79 | #$self->format_fk_name($config->{'format_fk_name'}); |
80 | #$self->format_pk_name($config->{'format_pk_name'}); |
7d5bcab8 |
81 | |
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82 | # |
e2158c40 |
83 | # Set the parser_args and producer_args |
49e1eb70 |
84 | # |
85 | for my $pargs ( qw[ parser_args producer_args ] ) { |
86 | $self->$pargs( $config->{$pargs} ) if defined $config->{ $pargs }; |
e2158c40 |
87 | } |
88 | |
49e1eb70 |
89 | # |
185c34d5 |
90 | # Initialize the filters. |
91 | # |
92 | if ( $config->{filters} && ref $config->{filters} eq "ARRAY" ) { |
93 | $self->filters( @{$config->{filters}} ) |
94 | || return $self->error('Error inititializing filters: '.$self->error); |
95 | } |
96 | |
97 | # |
9398955f |
98 | # Set the data source, if 'filename' or 'file' is provided. |
49e1eb70 |
99 | # |
c2d3a526 |
100 | $config->{'filename'} ||= $config->{'file'} || ""; |
49e1eb70 |
101 | $self->filename( $config->{'filename'} ) if $config->{'filename'}; |
9398955f |
102 | |
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103 | # |
185c34d5 |
104 | # Finally, if there is a 'data' parameter, use that in |
49e1eb70 |
105 | # preference to filename and file |
106 | # |
107 | if ( my $data = $config->{'data'} ) { |
108 | $self->data( $data ); |
9398955f |
109 | } |
110 | |
d529894e |
111 | # |
112 | # Set various other options. |
113 | # |
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114 | $self->{'debug'} = defined $config->{'debug'} ? $config->{'debug'} : $DEBUG; |
ca10f295 |
115 | |
96844cae |
116 | $self->add_drop_table( $config->{'add_drop_table'} ); |
185c34d5 |
117 | |
d529894e |
118 | $self->no_comments( $config->{'no_comments'} ); |
119 | |
96844cae |
120 | $self->show_warnings( $config->{'show_warnings'} ); |
121 | |
122 | $self->trace( $config->{'trace'} ); |
123 | |
3f4af30d |
124 | $self->validate( $config->{'validate'} ); |
5e2c196a |
125 | |
126 | $self->quote_table_names( (defined $config->{'quote_table_names'} |
127 | ? $config->{'quote_table_names'} : 1) ); |
128 | $self->quote_field_names( (defined $config->{'quote_field_names'} |
129 | ? $config->{'quote_field_names'} : 1) ); |
3f4af30d |
130 | |
ca10f295 |
131 | return $self; |
dfb4c915 |
132 | } |
1fd8c91f |
133 | |
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134 | # ---------------------------------------------------------------------- |
135 | # add_drop_table([$bool]) |
136 | # ---------------------------------------------------------------------- |
96844cae |
137 | sub add_drop_table { |
138 | my $self = shift; |
139 | if ( defined (my $arg = shift) ) { |
140 | $self->{'add_drop_table'} = $arg ? 1 : 0; |
141 | } |
142 | return $self->{'add_drop_table'} || 0; |
143 | } |
144 | |
0f3778d0 |
145 | # ---------------------------------------------------------------------- |
146 | # no_comments([$bool]) |
147 | # ---------------------------------------------------------------------- |
d529894e |
148 | sub no_comments { |
149 | my $self = shift; |
150 | my $arg = shift; |
151 | if ( defined $arg ) { |
152 | $self->{'no_comments'} = $arg ? 1 : 0; |
153 | } |
154 | return $self->{'no_comments'} || 0; |
155 | } |
156 | |
e2158c40 |
157 | |
0f3778d0 |
158 | # ---------------------------------------------------------------------- |
5e2c196a |
159 | # quote_table_names([$bool]) |
160 | # ---------------------------------------------------------------------- |
161 | sub quote_table_names { |
162 | my $self = shift; |
163 | if ( defined (my $arg = shift) ) { |
164 | $self->{'quote_table_names'} = $arg ? 1 : 0; |
165 | } |
166 | return $self->{'quote_table_names'} || 0; |
167 | } |
168 | |
169 | # ---------------------------------------------------------------------- |
170 | # quote_field_names([$bool]) |
171 | # ---------------------------------------------------------------------- |
172 | sub quote_field_names { |
173 | my $self = shift; |
174 | if ( defined (my $arg = shift) ) { |
175 | $self->{'quote_field_names'} = $arg ? 1 : 0; |
176 | } |
177 | return $self->{'quote_field_names'} || 0; |
178 | } |
179 | |
180 | # ---------------------------------------------------------------------- |
0f3778d0 |
181 | # producer([$producer_spec]) |
182 | # |
183 | # Get or set the producer for the current translator. |
184 | # ---------------------------------------------------------------------- |
ca10f295 |
185 | sub producer { |
f4a59b6c |
186 | shift->_tool({ |
185c34d5 |
187 | name => 'producer', |
f4a59b6c |
188 | path => "SQL::Translator::Producer", |
185c34d5 |
189 | default_sub => "produce", |
f4a59b6c |
190 | }, @_); |
191 | } |
077ebf34 |
192 | |
7a8e1f51 |
193 | # ---------------------------------------------------------------------- |
0f3778d0 |
194 | # producer_type() |
7a8e1f51 |
195 | # |
e2158c40 |
196 | # producer_type is an accessor that allows producer subs to get |
197 | # information about their origin. This is poptentially important; |
ca251f03 |
198 | # since all producer subs are called as subroutine references, there is |
e2158c40 |
199 | # no way for a producer to find out which package the sub lives in |
200 | # originally, for example. |
7a8e1f51 |
201 | # ---------------------------------------------------------------------- |
202 | sub producer_type { $_[0]->{'producer_type'} } |
e2158c40 |
203 | |
7a8e1f51 |
204 | # ---------------------------------------------------------------------- |
0f3778d0 |
205 | # producer_args([\%args]) |
7a8e1f51 |
206 | # |
e2158c40 |
207 | # Arbitrary name => value pairs of paramters can be passed to a |
208 | # producer using this method. |
52b828e8 |
209 | # |
0f3778d0 |
210 | # If the first argument passed in is undef, then the hash of arguments |
211 | # is cleared; all subsequent elements are added to the hash of name, |
212 | # value pairs stored as producer_args. |
7a8e1f51 |
213 | # ---------------------------------------------------------------------- |
f4a59b6c |
214 | sub producer_args { shift->_args("producer", @_); } |
ca10f295 |
215 | |
0f3778d0 |
216 | # ---------------------------------------------------------------------- |
217 | # parser([$parser_spec]) |
218 | # ---------------------------------------------------------------------- |
ca10f295 |
219 | sub parser { |
f4a59b6c |
220 | shift->_tool({ |
185c34d5 |
221 | name => 'parser', |
f4a59b6c |
222 | path => "SQL::Translator::Parser", |
185c34d5 |
223 | default_sub => "parse", |
f4a59b6c |
224 | }, @_); |
16dc9970 |
225 | } |
1fd8c91f |
226 | |
f4a59b6c |
227 | sub parser_type { $_[0]->{'parser_type'}; } |
e2158c40 |
228 | |
f4a59b6c |
229 | sub parser_args { shift->_args("parser", @_); } |
96844cae |
230 | |
f4a59b6c |
231 | # ---------------------------------------------------------------------- |
185c34d5 |
232 | # e.g. |
233 | # $sqlt->filters => [ |
234 | # sub { }, |
235 | # [ "NormalizeNames", field => "lc", tabel => "ucfirst" ], |
236 | # [ |
237 | # "DataTypeMap", |
238 | # "TEXT" => "BIGTEXT", |
239 | # ], |
240 | # ], |
241 | # ---------------------------------------------------------------------- |
242 | sub filters { |
243 | my $self = shift; |
244 | my $filters = $self->{filters} ||= []; |
245 | return @$filters unless @_; |
246 | |
44eb9098 |
247 | # Set. Convert args to list of [\&code,@args] |
185c34d5 |
248 | foreach (@_) { |
44eb9098 |
249 | my ($filt,@args) = ref($_) eq "ARRAY" ? @$_ : $_; |
250 | if ( isa($filt,"CODE") ) { |
251 | push @$filters, [$filt,@args]; |
185c34d5 |
252 | next; |
253 | } |
254 | else { |
44eb9098 |
255 | $self->debug("Adding $filt filter. Args:".Dumper(\@args)."\n"); |
256 | $filt = _load_sub("$filt\::filter", "SQL::Translator::Filter") |
257 | || return $self->error(__PACKAGE__->error); |
258 | push @$filters, [$filt,@args]; |
185c34d5 |
259 | } |
260 | } |
261 | return @$filters; |
262 | } |
263 | |
264 | # ---------------------------------------------------------------------- |
96844cae |
265 | sub show_warnings { |
266 | my $self = shift; |
267 | my $arg = shift; |
268 | if ( defined $arg ) { |
269 | $self->{'show_warnings'} = $arg ? 1 : 0; |
270 | } |
271 | return $self->{'show_warnings'} || 0; |
272 | } |
273 | |
ca10f295 |
274 | |
0f3778d0 |
275 | # filename - get or set the filename |
276 | sub filename { |
277 | my $self = shift; |
278 | if (@_) { |
279 | my $filename = shift; |
280 | if (-d $filename) { |
281 | my $msg = "Cannot use directory '$filename' as input source"; |
282 | return $self->error($msg); |
f69e9da3 |
283 | } elsif (ref($filename) eq 'ARRAY') { |
284 | $self->{'filename'} = $filename; |
285 | $self->debug("Got array of files: ".join(', ',@$filename)."\n"); |
0f3778d0 |
286 | } elsif (-f _ && -r _) { |
287 | $self->{'filename'} = $filename; |
288 | $self->debug("Got filename: '$self->{'filename'}'\n"); |
289 | } else { |
290 | my $msg = "Cannot use '$filename' as input source: ". |
291 | "file does not exist or is not readable."; |
292 | return $self->error($msg); |
293 | } |
294 | } |
ca10f295 |
295 | |
0f3778d0 |
296 | $self->{'filename'}; |
297 | } |
ca10f295 |
298 | |
0f3778d0 |
299 | # ---------------------------------------------------------------------- |
300 | # data([$data]) |
301 | # |
302 | # if $self->{'data'} is not set, but $self->{'filename'} is, then |
303 | # $self->{'filename'} is opened and read, with the results put into |
304 | # $self->{'data'}. |
305 | # ---------------------------------------------------------------------- |
306 | sub data { |
307 | my $self = shift; |
ca10f295 |
308 | |
0f3778d0 |
309 | # Set $self->{'data'} based on what was passed in. We will |
310 | # accept a number of things; do our best to get it right. |
311 | if (@_) { |
312 | my $data = shift; |
313 | if (isa($data, "SCALAR")) { |
314 | $self->{'data'} = $data; |
315 | } |
316 | else { |
317 | if (isa($data, 'ARRAY')) { |
318 | $data = join '', @$data; |
319 | } |
320 | elsif (isa($data, 'GLOB')) { |
ca96e7ee |
321 | seek ($data, 0, 0) if eof ($data); |
0f3778d0 |
322 | local $/; |
323 | $data = <$data>; |
324 | } |
325 | elsif (! ref $data && @_) { |
326 | $data = join '', $data, @_; |
327 | } |
328 | $self->{'data'} = \$data; |
329 | } |
330 | } |
9398955f |
331 | |
7a8e1f51 |
332 | # If we have a filename but no data yet, populate. |
9398955f |
333 | if (not $self->{'data'} and my $filename = $self->filename) { |
49e1eb70 |
334 | $self->debug("Opening '$filename' to get contents.\n"); |
9398955f |
335 | local *FH; |
336 | local $/; |
337 | my $data; |
338 | |
f69e9da3 |
339 | my @files = ref($filename) eq 'ARRAY' ? @$filename : ($filename); |
9398955f |
340 | |
f69e9da3 |
341 | foreach my $file (@files) { |
960b4e55 |
342 | unless (open FH, $file) { |
343 | return $self->error("Can't read file '$file': $!"); |
344 | } |
9398955f |
345 | |
960b4e55 |
346 | $data .= <FH>; |
95a2cfb6 |
347 | |
960b4e55 |
348 | unless (close FH) { |
349 | return $self->error("Can't close file '$file': $!"); |
350 | } |
f69e9da3 |
351 | } |
95a2cfb6 |
352 | |
f69e9da3 |
353 | $self->{'data'} = \$data; |
9398955f |
354 | } |
9398955f |
355 | |
356 | return $self->{'data'}; |
7a8e1f51 |
357 | } |
9398955f |
358 | |
45ee6be0 |
359 | # ---------------------------------------------------------------------- |
a57ce769 |
360 | sub reset { |
361 | # |
362 | # Deletes the existing Schema object so that future calls to translate |
363 | # don't append to the existing. |
364 | # |
365 | my $self = shift; |
366 | $self->{'schema'} = undef; |
367 | return 1; |
368 | } |
369 | |
370 | # ---------------------------------------------------------------------- |
45ee6be0 |
371 | sub schema { |
372 | # |
373 | # Returns the SQL::Translator::Schema object |
374 | # |
375 | my $self = shift; |
376 | |
377 | unless ( defined $self->{'schema'} ) { |
47fed978 |
378 | $self->{'schema'} = SQL::Translator::Schema->new( |
10f36920 |
379 | translator => $self, |
47fed978 |
380 | ); |
45ee6be0 |
381 | } |
d529894e |
382 | |
45ee6be0 |
383 | return $self->{'schema'}; |
384 | } |
385 | |
386 | # ---------------------------------------------------------------------- |
d529894e |
387 | sub trace { |
388 | my $self = shift; |
389 | my $arg = shift; |
390 | if ( defined $arg ) { |
391 | $self->{'trace'} = $arg ? 1 : 0; |
392 | } |
393 | return $self->{'trace'} || 0; |
394 | } |
395 | |
396 | # ---------------------------------------------------------------------- |
0f3778d0 |
397 | # translate([source], [\%args]) |
398 | # |
399 | # translate does the actual translation. The main argument is the |
400 | # source of the data to be translated, which can be a filename, scalar |
401 | # reference, or glob reference. |
402 | # |
403 | # Alternatively, translate takes optional arguements, which are passed |
404 | # to the appropriate places. Most notable of these arguments are |
405 | # parser and producer, which can be used to set the parser and |
406 | # producer, respectively. This is the applications last chance to set |
407 | # these. |
408 | # |
409 | # translate returns a string. |
410 | # ---------------------------------------------------------------------- |
ca251f03 |
411 | sub translate { |
412 | my $self = shift; |
413 | my ($args, $parser, $parser_type, $producer, $producer_type); |
5e2c196a |
414 | my ($parser_output, $producer_output, @producer_output); |
ca10f295 |
415 | |
7a8e1f51 |
416 | # Parse arguments |
185c34d5 |
417 | if (@_ == 1) { |
7a8e1f51 |
418 | # Passed a reference to a hash? |
ca10f295 |
419 | if (isa($_[0], 'HASH')) { |
7a8e1f51 |
420 | # yep, a hashref |
49e1eb70 |
421 | $self->debug("translate: Got a hashref\n"); |
ca10f295 |
422 | $args = $_[0]; |
423 | } |
9398955f |
424 | |
0f3778d0 |
425 | # Passed a GLOB reference, i.e., filehandle |
426 | elsif (isa($_[0], 'GLOB')) { |
427 | $self->debug("translate: Got a GLOB reference\n"); |
428 | $self->data($_[0]); |
429 | } |
430 | |
7a8e1f51 |
431 | # Passed a reference to a string containing the data |
ca10f295 |
432 | elsif (isa($_[0], 'SCALAR')) { |
9398955f |
433 | # passed a ref to a string |
49e1eb70 |
434 | $self->debug("translate: Got a SCALAR reference (string)\n"); |
9398955f |
435 | $self->data($_[0]); |
ca10f295 |
436 | } |
9398955f |
437 | |
7a8e1f51 |
438 | # Not a reference; treat it as a filename |
b346d8f1 |
439 | elsif (! ref $_[0]) { |
ca10f295 |
440 | # Not a ref, it's a filename |
49e1eb70 |
441 | $self->debug("translate: Got a filename\n"); |
9398955f |
442 | $self->filename($_[0]); |
ca10f295 |
443 | } |
9398955f |
444 | |
7a8e1f51 |
445 | # Passed something else entirely. |
b346d8f1 |
446 | else { |
447 | # We're not impressed. Take your empty string and leave. |
38254289 |
448 | # return ""; |
449 | |
7a8e1f51 |
450 | # Actually, if data, parser, and producer are set, then we |
451 | # can continue. Too bad, because I like my comment |
452 | # (above)... |
38254289 |
453 | return "" unless ($self->data && |
454 | $self->producer && |
455 | $self->parser); |
b346d8f1 |
456 | } |
16dc9970 |
457 | } |
458 | else { |
b346d8f1 |
459 | # You must pass in a hash, or you get nothing. |
460 | return "" if @_ % 2; |
ca10f295 |
461 | $args = { @_ }; |
7a8e1f51 |
462 | } |
16dc9970 |
463 | |
9398955f |
464 | # ---------------------------------------------------------------------- |
465 | # Can specify the data to be transformed using "filename", "file", |
7a8e1f51 |
466 | # "data", or "datasource". |
9398955f |
467 | # ---------------------------------------------------------------------- |
7a8e1f51 |
468 | if (my $filename = ($args->{'filename'} || $args->{'file'})) { |
9398955f |
469 | $self->filename($filename); |
470 | } |
ca10f295 |
471 | |
422298aa |
472 | if (my $data = ($args->{'data'} || $args->{'datasource'})) { |
9398955f |
473 | $self->data($data); |
16dc9970 |
474 | } |
ca10f295 |
475 | |
9398955f |
476 | # ---------------------------------------------------------------- |
477 | # Get the data. |
478 | # ---------------------------------------------------------------- |
479 | my $data = $self->data; |
077ebf34 |
480 | |
9398955f |
481 | # ---------------------------------------------------------------- |
ca10f295 |
482 | # Local reference to the parser subroutine |
9398955f |
483 | # ---------------------------------------------------------------- |
ca10f295 |
484 | if ($parser = ($args->{'parser'} || $args->{'from'})) { |
485 | $self->parser($parser); |
16dc9970 |
486 | } |
7a8e1f51 |
487 | $parser = $self->parser; |
488 | $parser_type = $self->parser_type; |
16dc9970 |
489 | |
9398955f |
490 | # ---------------------------------------------------------------- |
ca10f295 |
491 | # Local reference to the producer subroutine |
9398955f |
492 | # ---------------------------------------------------------------- |
ca10f295 |
493 | if ($producer = ($args->{'producer'} || $args->{'to'})) { |
494 | $self->producer($producer); |
16dc9970 |
495 | } |
7a8e1f51 |
496 | $producer = $self->producer; |
497 | $producer_type = $self->producer_type; |
16dc9970 |
498 | |
9398955f |
499 | # ---------------------------------------------------------------- |
185c34d5 |
500 | # Execute the parser, the filters and then execute the producer. |
7a8e1f51 |
501 | # Allowances are made for each piece to die, or fail to compile, |
502 | # since the referenced subroutines could be almost anything. In |
503 | # the future, each of these might happen in a Safe environment, |
504 | # depending on how paranoid we want to be. |
9398955f |
505 | # ---------------------------------------------------------------- |
185c34d5 |
506 | |
507 | # Run parser |
a57ce769 |
508 | unless ( defined $self->{'schema'} ) { |
509 | eval { $parser_output = $parser->($self, $$data) }; |
510 | if ($@ || ! $parser_output) { |
511 | my $msg = sprintf "translate: Error with parser '%s': %s", |
512 | $parser_type, ($@) ? $@ : " no results"; |
513 | return $self->error($msg); |
514 | } |
7a8e1f51 |
515 | } |
841a3f1a |
516 | $self->debug("Schema =\n", Dumper($self->schema), "\n"); |
517 | |
185c34d5 |
518 | # Validate the schema if asked to. |
4b6a6341 |
519 | if ($self->validate) { |
3f4af30d |
520 | my $schema = $self->schema; |
521 | return $self->error('Invalid schema') unless $schema->is_valid; |
522 | } |
523 | |
185c34d5 |
524 | # Run filters |
525 | my $filt_num = 0; |
526 | foreach ($self->filters) { |
527 | $filt_num++; |
44eb9098 |
528 | my ($code,@args) = @$_; |
529 | eval { $code->($self->schema, @args) }; |
185c34d5 |
530 | my $err = $@ || $self->error || 0; |
531 | return $self->error("Error with filter $filt_num : $err") if $err; |
532 | } |
533 | |
534 | # Run producer |
5e2c196a |
535 | # Calling wantarray in the eval no work, wrong scope. |
536 | my $wantarray = wantarray ? 1 : 0; |
a83ffc24 |
537 | eval { |
538 | if ($wantarray) { |
539 | @producer_output = $producer->($self); |
540 | } else { |
541 | $producer_output = $producer->($self); |
542 | } |
543 | }; |
5e2c196a |
544 | if ($@ || !( $producer_output || @producer_output)) { |
a5d57a52 |
545 | my $err = $@ || $self->error || "no results"; |
546 | my $msg = "translate: Error with producer '$producer_type': $err"; |
c2d3a526 |
547 | return $self->error($msg); |
7a8e1f51 |
548 | } |
549 | |
5e2c196a |
550 | return wantarray ? @producer_output : $producer_output; |
16dc9970 |
551 | } |
ca10f295 |
552 | |
d529894e |
553 | # ---------------------------------------------------------------------- |
0f3778d0 |
554 | # list_parsers() |
555 | # |
556 | # Hacky sort of method to list all available parsers. This has |
557 | # several problems: |
558 | # |
559 | # - Only finds things in the SQL::Translator::Parser namespace |
560 | # |
561 | # - Only finds things that are located in the same directory |
562 | # as SQL::Translator::Parser. Yeck. |
563 | # |
564 | # This method will fail in several very likely cases: |
565 | # |
566 | # - Parser modules in different namespaces |
567 | # |
568 | # - Parser modules in the SQL::Translator::Parser namespace that |
569 | # have any XS componenets will be installed in |
570 | # arch_lib/SQL/Translator. |
571 | # |
572 | # ---------------------------------------------------------------------- |
573 | sub list_parsers { |
ca1f2237 |
574 | return shift->_list("parser"); |
0f3778d0 |
575 | } |
576 | |
577 | # ---------------------------------------------------------------------- |
578 | # list_producers() |
579 | # |
580 | # See notes for list_parsers(), above; all the problems apply to |
581 | # list_producers as well. |
582 | # ---------------------------------------------------------------------- |
c0c4aef9 |
583 | sub list_producers { |
ca1f2237 |
584 | return shift->_list("producer"); |
0f3778d0 |
585 | } |
586 | |
c0c4aef9 |
587 | |
0f3778d0 |
588 | # ====================================================================== |
589 | # Private Methods |
590 | # ====================================================================== |
c0c4aef9 |
591 | |
0f3778d0 |
592 | # ---------------------------------------------------------------------- |
593 | # _args($type, \%args); |
594 | # |
595 | # Gets or sets ${type}_args. Called by parser_args and producer_args. |
596 | # ---------------------------------------------------------------------- |
597 | sub _args { |
598 | my $self = shift; |
599 | my $type = shift; |
600 | $type = "${type}_args" unless $type =~ /_args$/; |
601 | |
602 | unless (defined $self->{$type} && isa($self->{$type}, 'HASH')) { |
603 | $self->{$type} = { }; |
604 | } |
605 | |
606 | if (@_) { |
607 | # If the first argument is an explicit undef (remember, we |
608 | # don't get here unless there is stuff in @_), then we clear |
609 | # out the producer_args hash. |
610 | if (! defined $_[0]) { |
611 | shift @_; |
612 | %{$self->{$type}} = (); |
613 | } |
614 | |
615 | my $args = isa($_[0], 'HASH') ? shift : { @_ }; |
616 | %{$self->{$type}} = (%{$self->{$type}}, %$args); |
617 | } |
618 | |
619 | $self->{$type}; |
c0c4aef9 |
620 | } |
621 | |
d529894e |
622 | # ---------------------------------------------------------------------- |
f4a59b6c |
623 | # Does the get/set work for parser and producer. e.g. |
624 | # return $self->_tool({ |
625 | # name => 'producer', |
626 | # path => "SQL::Translator::Producer", |
627 | # default_sub => "produce", |
628 | # }, @_); |
629 | # ---------------------------------------------------------------------- |
630 | sub _tool { |
631 | my ($self,$args) = (shift, shift); |
632 | my $name = $args->{name}; |
da3a97b7 |
633 | return $self->{$name} unless @_; # get accessor |
634 | |
635 | my $path = $args->{path}; |
636 | my $default_sub = $args->{default_sub}; |
f4a59b6c |
637 | my $tool = shift; |
da3a97b7 |
638 | |
f4a59b6c |
639 | # passed an anonymous subroutine reference |
640 | if (isa($tool, 'CODE')) { |
641 | $self->{$name} = $tool; |
642 | $self->{"$name\_type"} = "CODE"; |
643 | $self->debug("Got $name: code ref\n"); |
da3a97b7 |
644 | } |
f4a59b6c |
645 | |
da3a97b7 |
646 | # Module name was passed directly |
647 | # We try to load the name; if it doesn't load, there's a |
648 | # possibility that it has a function name attached to it, |
649 | # so we give it a go. |
f4a59b6c |
650 | else { |
f4a59b6c |
651 | $tool =~ s/-/::/g if $tool !~ /::/; |
da3a97b7 |
652 | my ($code,$sub); |
653 | ($code,$sub) = _load_sub("$tool\::$default_sub", $path); |
9c0bc5a5 |
654 | unless ($code) { |
655 | if ( __PACKAGE__->error =~ m/Can't find module/ ) { |
656 | # Mod not found so try sub |
657 | ($code,$sub) = _load_sub("$tool", $path) unless $code; |
658 | die "Can't load $name subroutine '$tool' : ".__PACKAGE__->error |
659 | unless $code; |
660 | } |
661 | else { |
662 | die "Can't load $name '$tool' : ".__PACKAGE__->error; |
663 | } |
664 | } |
185c34d5 |
665 | |
f4a59b6c |
666 | # get code reference and assign |
da3a97b7 |
667 | my (undef,$module,undef) = $sub =~ m/((.*)::)?(\w+)$/; |
668 | $self->{$name} = $code; |
669 | $self->{"$name\_type"} = $sub eq "CODE" ? "CODE" : $module; |
670 | $self->debug("Got $name: $sub\n"); |
671 | } |
f4a59b6c |
672 | |
673 | # At this point, $self->{$name} contains a subroutine |
674 | # reference that is ready to run |
675 | |
676 | # Anything left? If so, it's args |
677 | my $meth = "$name\_args"; |
678 | $self->$meth(@_) if (@_); |
679 | |
680 | return $self->{$name}; |
681 | } |
682 | |
683 | # ---------------------------------------------------------------------- |
0f3778d0 |
684 | # _list($type) |
685 | # ---------------------------------------------------------------------- |
686 | sub _list { |
3015bf96 |
687 | my $self = shift; |
688 | my $type = shift || return (); |
ca1f2237 |
689 | my $uctype = ucfirst lc $type; |
ca1f2237 |
690 | |
3015bf96 |
691 | # |
692 | # First find all the directories where SQL::Translator |
693 | # parsers or producers (the "type") appear to live. |
694 | # |
ca1f2237 |
695 | load("SQL::Translator::$uctype") or return (); |
696 | my $path = catfile "SQL", "Translator", $uctype; |
3015bf96 |
697 | my @dirs; |
ca1f2237 |
698 | for (@INC) { |
699 | my $dir = catfile $_, $path; |
4b6a6341 |
700 | $self->debug("_list_${type}s searching $dir\n"); |
ca1f2237 |
701 | next unless -d $dir; |
3015bf96 |
702 | push @dirs, $dir; |
ca1f2237 |
703 | } |
c0c4aef9 |
704 | |
3015bf96 |
705 | # |
706 | # Now use File::File::find to look recursively in those |
707 | # directories for all the *.pm files, then present them |
708 | # with the slashes turned into dashes. |
709 | # |
710 | my %found; |
711 | find( |
712 | sub { |
713 | if ( -f && m/\.pm$/ ) { |
714 | my $mod = $_; |
715 | $mod =~ s/\.pm$//; |
716 | my $cur_dir = $File::Find::dir; |
04db8601 |
717 | my $base_dir = quotemeta catfile 'SQL', 'Translator', $uctype; |
3015bf96 |
718 | |
719 | # |
720 | # See if the current directory is below the base directory. |
721 | # |
722 | if ( $cur_dir =~ m/$base_dir(.*)/ ) { |
723 | $cur_dir = $1; |
724 | $cur_dir =~ s!^/!!; # kill leading slash |
725 | $cur_dir =~ s!/!-!g; # turn other slashes into dashes |
726 | } |
727 | else { |
728 | $cur_dir = ''; |
729 | } |
730 | |
731 | $found{ join '-', map { $_ || () } $cur_dir, $mod } = 1; |
732 | } |
733 | }, |
734 | @dirs |
735 | ); |
736 | |
737 | return sort { lc $a cmp lc $b } keys %found; |
c0c4aef9 |
738 | } |
739 | |
d529894e |
740 | # ---------------------------------------------------------------------- |
f4a59b6c |
741 | # load(MODULE [,PATH[,PATH]...]) |
0f3778d0 |
742 | # |
743 | # Loads a Perl module. Short circuits if a module is already loaded. |
f4a59b6c |
744 | # |
745 | # MODULE - is the name of the module to load. |
746 | # |
747 | # PATH - optional list of 'package paths' to look for the module in. e.g |
017580f4 |
748 | # If you called load('Super::Foo' => 'My', 'Other') it will |
749 | # try to load the mod Super::Foo then My::Super::Foo then Other::Super::Foo. |
f4a59b6c |
750 | # |
751 | # Returns package name of the module actually loaded or false and sets error. |
752 | # |
185c34d5 |
753 | # Note, you can't load a name from the root namespace (ie one without '::' in |
f4a59b6c |
754 | # it), therefore a single word name without a path fails. |
0f3778d0 |
755 | # ---------------------------------------------------------------------- |
ca10f295 |
756 | sub load { |
f4a59b6c |
757 | my $name = shift; |
758 | my @path; |
759 | push @path, "" if $name =~ /::/; # Empty path to check name on its own first |
760 | push @path, @_ if @_; |
761 | |
762 | foreach (@path) { |
763 | my $module = $_ ? "$_\::$name" : $name; |
764 | my $file = $module; $file =~ s[::][/]g; $file .= ".pm"; |
765 | __PACKAGE__->debug("Loading $name as $file\n"); |
766 | return $module if $INC{$file}; # Already loaded |
185c34d5 |
767 | |
f4a59b6c |
768 | eval { require $file }; |
769 | next if $@ =~ /Can't locate $file in \@INC/; |
617f79f6 |
770 | eval { $module->import() } unless $@; |
017580f4 |
771 | return __PACKAGE__->error("Error loading $name as $module : $@") |
772 | if $@ && $@ !~ /"SQL::Translator::Producer" is not exported/; |
f4a59b6c |
773 | |
774 | return $module; # Module loaded ok |
775 | } |
ca1f2237 |
776 | |
9c0bc5a5 |
777 | return __PACKAGE__->error("Can't find module $name. Path:".join(",",@path)); |
da3a97b7 |
778 | } |
779 | |
780 | # ---------------------------------------------------------------------- |
781 | # Load the sub name given (including package), optionally using a base package |
782 | # path. Returns code ref and name of sub loaded, including its package. |
783 | # (\&code, $sub) = load_sub( 'MySQL::produce', "SQL::Translator::Producer" ); |
784 | # (\&code, $sub) = load_sub( 'MySQL::produce', @path ); |
785 | # ---------------------------------------------------------------------- |
786 | sub _load_sub { |
787 | my ($tool, @path) = @_; |
185c34d5 |
788 | |
da3a97b7 |
789 | my (undef,$module,$func_name) = $tool =~ m/((.*)::)?(\w+)$/; |
790 | if ( my $module = load($module => @path) ) { |
791 | my $sub = "$module\::$func_name"; |
185c34d5 |
792 | return wantarray ? ( \&{ $sub }, $sub ) : \&$sub; |
793 | } |
da3a97b7 |
794 | return undef; |
1fd8c91f |
795 | } |
16dc9970 |
796 | |
67e5ff53 |
797 | # ---------------------------------------------------------------------- |
7d5bcab8 |
798 | sub format_table_name { |
1ea530d4 |
799 | return shift->_format_name('_format_table_name', @_); |
7d5bcab8 |
800 | } |
801 | |
67e5ff53 |
802 | # ---------------------------------------------------------------------- |
7d5bcab8 |
803 | sub format_package_name { |
1ea530d4 |
804 | return shift->_format_name('_format_package_name', @_); |
7d5bcab8 |
805 | } |
806 | |
67e5ff53 |
807 | # ---------------------------------------------------------------------- |
7d5bcab8 |
808 | sub format_fk_name { |
1ea530d4 |
809 | return shift->_format_name('_format_fk_name', @_); |
7d5bcab8 |
810 | } |
811 | |
67e5ff53 |
812 | # ---------------------------------------------------------------------- |
7d5bcab8 |
813 | sub format_pk_name { |
1ea530d4 |
814 | return shift->_format_name('_format_pk_name', @_); |
815 | } |
816 | |
817 | # ---------------------------------------------------------------------- |
185c34d5 |
818 | # The other format_*_name methods rely on this one. It optionally |
1ea530d4 |
819 | # accepts a subroutine ref as the first argument (or uses an identity |
820 | # sub if one isn't provided or it doesn't already exist), and applies |
821 | # it to the rest of the arguments (if any). |
822 | # ---------------------------------------------------------------------- |
823 | sub _format_name { |
f9a0c3b5 |
824 | my $self = shift; |
1ea530d4 |
825 | my $field = shift; |
826 | my @args = @_; |
8a990c91 |
827 | |
1ea530d4 |
828 | if (ref($args[0]) eq 'CODE') { |
829 | $self->{$field} = shift @args; |
8a990c91 |
830 | } |
1ea530d4 |
831 | elsif (! exists $self->{$field}) { |
832 | $self->{$field} = sub { return shift }; |
8a990c91 |
833 | } |
834 | |
1ea530d4 |
835 | return @args ? $self->{$field}->(@args) : $self->{$field}; |
7d5bcab8 |
836 | } |
837 | |
d529894e |
838 | # ---------------------------------------------------------------------- |
0f3778d0 |
839 | # isa($ref, $type) |
840 | # |
841 | # Calls UNIVERSAL::isa($ref, $type). I think UNIVERSAL::isa is ugly, |
842 | # but I like function overhead. |
843 | # ---------------------------------------------------------------------- |
844 | sub isa($$) { |
845 | my ($ref, $type) = @_; |
846 | return UNIVERSAL::isa($ref, $type); |
847 | } |
c2d3a526 |
848 | |
3f4af30d |
849 | # ---------------------------------------------------------------------- |
c314ec98 |
850 | # version |
851 | # |
852 | # Returns the $VERSION of the main SQL::Translator package. |
853 | # ---------------------------------------------------------------------- |
854 | sub version { |
855 | my $self = shift; |
856 | return $VERSION; |
857 | } |
858 | |
859 | # ---------------------------------------------------------------------- |
3f4af30d |
860 | sub validate { |
3f4af30d |
861 | my ( $self, $arg ) = @_; |
862 | if ( defined $arg ) { |
863 | $self->{'validate'} = $arg ? 1 : 0; |
864 | } |
865 | return $self->{'validate'} || 0; |
866 | } |
867 | |
16dc9970 |
868 | 1; |
16dc9970 |
869 | |
389b318c |
870 | # ---------------------------------------------------------------------- |
871 | # Who killed the pork chops? |
872 | # What price bananas? |
873 | # Are you my Angel? |
874 | # Allen Ginsberg |
875 | # ---------------------------------------------------------------------- |
876 | |
877 | =pod |
0f3778d0 |
878 | |
879 | =head1 NAME |
880 | |
954f31f1 |
881 | SQL::Translator - manipulate structured data definitions (SQL and more) |
0f3778d0 |
882 | |
883 | =head1 SYNOPSIS |
884 | |
885 | use SQL::Translator; |
886 | |
67e5ff53 |
887 | my $translator = SQL::Translator->new( |
888 | # Print debug info |
889 | debug => 1, |
890 | # Print Parse::RecDescent trace |
185c34d5 |
891 | trace => 0, |
67e5ff53 |
892 | # Don't include comments in output |
185c34d5 |
893 | no_comments => 0, |
67e5ff53 |
894 | # Print name mutations, conflicts |
185c34d5 |
895 | show_warnings => 0, |
67e5ff53 |
896 | # Add "drop table" statements |
185c34d5 |
897 | add_drop_table => 1, |
5e2c196a |
898 | # to quote or not to quote, thats the question |
899 | quote_table_names => 1, |
900 | quote_field_names => 1, |
67e5ff53 |
901 | # Validate schema object |
185c34d5 |
902 | validate => 1, |
f9a0c3b5 |
903 | # Make all table names CAPS in producers which support this option |
67e5ff53 |
904 | format_table_name => sub {my $tablename = shift; return uc($tablename)}, |
f9a0c3b5 |
905 | # Null-op formatting, only here for documentation's sake |
7d5bcab8 |
906 | format_package_name => sub {return shift}, |
907 | format_fk_name => sub {return shift}, |
908 | format_pk_name => sub {return shift}, |
0f3778d0 |
909 | ); |
910 | |
911 | my $output = $translator->translate( |
389b318c |
912 | from => 'MySQL', |
913 | to => 'Oracle', |
f9a0c3b5 |
914 | # Or an arrayref of filenames, i.e. [ $file1, $file2, $file3 ] |
185c34d5 |
915 | filename => $file, |
0f3778d0 |
916 | ) or die $translator->error; |
917 | |
918 | print $output; |
919 | |
920 | =head1 DESCRIPTION |
921 | |
2d993495 |
922 | This documentation covers the API for SQL::Translator. For a more general |
923 | discussion of how to use the modules and scripts, please see |
924 | L<SQL::Translator::Manual>. |
925 | |
29efc9fd |
926 | SQL::Translator is a group of Perl modules that converts |
927 | vendor-specific SQL table definitions into other formats, such as |
928 | other vendor-specific SQL, ER diagrams, documentation (POD and HTML), |
929 | XML, and Class::DBI classes. The main focus of SQL::Translator is |
930 | SQL, but parsers exist for other structured data formats, including |
931 | Excel spreadsheets and arbitrarily delimited text files. Through the |
932 | separation of the code into parsers and producers with an object model |
933 | in between, it's possible to combine any parser with any producer, to |
934 | plug in custom parsers or producers, or to manipulate the parsed data |
935 | via the built-in object model. Presently only the definition parts of |
936 | SQL are handled (CREATE, ALTER), not the manipulation of data (INSERT, |
937 | UPDATE, DELETE). |
0f3778d0 |
938 | |
939 | =head1 CONSTRUCTOR |
940 | |
5760246d |
941 | The constructor is called C<new>, and accepts a optional hash of options. |
0f3778d0 |
942 | Valid options are: |
943 | |
944 | =over 4 |
945 | |
ca251f03 |
946 | =item * |
947 | |
948 | parser / from |
949 | |
950 | =item * |
951 | |
952 | parser_args |
0f3778d0 |
953 | |
ca251f03 |
954 | =item * |
0f3778d0 |
955 | |
ca251f03 |
956 | producer / to |
0f3778d0 |
957 | |
ca251f03 |
958 | =item * |
0f3778d0 |
959 | |
ca251f03 |
960 | producer_args |
0f3778d0 |
961 | |
ca251f03 |
962 | =item * |
963 | |
185c34d5 |
964 | filters |
965 | |
966 | =item * |
967 | |
ca251f03 |
968 | filename / file |
969 | |
970 | =item * |
971 | |
972 | data |
973 | |
974 | =item * |
0f3778d0 |
975 | |
ca251f03 |
976 | debug |
0f3778d0 |
977 | |
389b318c |
978 | =item * |
979 | |
980 | add_drop_table |
981 | |
982 | =item * |
983 | |
5e2c196a |
984 | quote_table_names |
985 | |
986 | =item * |
987 | |
988 | quote_field_names |
989 | |
990 | =item * |
991 | |
389b318c |
992 | no_comments |
993 | |
994 | =item * |
995 | |
996 | trace |
997 | |
998 | =item * |
999 | |
1000 | validate |
1001 | |
0f3778d0 |
1002 | =back |
1003 | |
1004 | All options are, well, optional; these attributes can be set via |
1005 | instance methods. Internally, they are; no (non-syntactical) |
1006 | advantage is gained by passing options to the constructor. |
1007 | |
1008 | =head1 METHODS |
1009 | |
5760246d |
1010 | =head2 add_drop_table |
0f3778d0 |
1011 | |
1012 | Toggles whether or not to add "DROP TABLE" statements just before the |
1013 | create definitions. |
1014 | |
5e2c196a |
1015 | =head2 quote_table_names |
1016 | |
1017 | Toggles whether or not to quote table names with " in DROP and CREATE |
1018 | statements. The default (true) is to quote them. |
1019 | |
1020 | =head2 quote_field_names |
1021 | |
1022 | Toggles whether or not to quote field names with " in most |
1023 | statements. The default (true), is to quote them. |
1024 | |
5760246d |
1025 | =head2 no_comments |
0f3778d0 |
1026 | |
1027 | Toggles whether to print comments in the output. Accepts a true or false |
1028 | value, returns the current value. |
1029 | |
5760246d |
1030 | =head2 producer |
0f3778d0 |
1031 | |
5760246d |
1032 | The C<producer> method is an accessor/mutator, used to retrieve or |
0f3778d0 |
1033 | define what subroutine is called to produce the output. A subroutine |
1034 | defined as a producer will be invoked as a function (I<not a method>) |
8e1fc861 |
1035 | and passed its container C<SQL::Translator> instance, which it should |
1036 | call the C<schema> method on, to get the C<SQL::Translator::Schema> |
1037 | generated by the parser. It is expected that the function transform the |
1038 | schema structure to a string. The C<SQL::Translator> instance is also useful |
1039 | for informational purposes; for example, the type of the parser can be |
5760246d |
1040 | retrieved using the C<parser_type> method, and the C<error> and |
1041 | C<debug> methods can be called when needed. |
0f3778d0 |
1042 | |
ca251f03 |
1043 | When defining a producer, one of several things can be passed in: A |
5760246d |
1044 | module name (e.g., C<My::Groovy::Producer>), a module name relative to |
1045 | the C<SQL::Translator::Producer> namespace (e.g., C<MySQL>), a module |
ca251f03 |
1046 | name and function combination (C<My::Groovy::Producer::transmogrify>), |
0f3778d0 |
1047 | or a reference to an anonymous subroutine. If a full module name is |
1048 | passed in (for the purposes of this method, a string containing "::" |
1049 | is considered to be a module name), it is treated as a package, and a |
ca251f03 |
1050 | function called "produce" will be invoked: C<$modulename::produce>. |
1051 | If $modulename cannot be loaded, the final portion is stripped off and |
0f3778d0 |
1052 | treated as a function. In other words, if there is no file named |
ca251f03 |
1053 | F<My/Groovy/Producer/transmogrify.pm>, C<SQL::Translator> will attempt |
5760246d |
1054 | to load F<My/Groovy/Producer.pm> and use C<transmogrify> as the name of |
1055 | the function, instead of the default C<produce>. |
0f3778d0 |
1056 | |
1057 | my $tr = SQL::Translator->new; |
1058 | |
1059 | # This will invoke My::Groovy::Producer::produce($tr, $data) |
1060 | $tr->producer("My::Groovy::Producer"); |
1061 | |
1062 | # This will invoke SQL::Translator::Producer::Sybase::produce($tr, $data) |
1063 | $tr->producer("Sybase"); |
1064 | |
1065 | # This will invoke My::Groovy::Producer::transmogrify($tr, $data), |
1066 | # assuming that My::Groovy::Producer::transmogrify is not a module |
1067 | # on disk. |
1068 | $tr->producer("My::Groovy::Producer::transmogrify"); |
1069 | |
1070 | # This will invoke the referenced subroutine directly, as |
1071 | # $subref->($tr, $data); |
1072 | $tr->producer(\&my_producer); |
1073 | |
5760246d |
1074 | There is also a method named C<producer_type>, which is a string |
1075 | containing the classname to which the above C<produce> function |
0f3778d0 |
1076 | belongs. In the case of anonymous subroutines, this method returns |
1077 | the string "CODE". |
1078 | |
5760246d |
1079 | Finally, there is a method named C<producer_args>, which is both an |
0f3778d0 |
1080 | accessor and a mutator. Arbitrary data may be stored in name => value |
1081 | pairs for the producer subroutine to access: |
1082 | |
1083 | sub My::Random::producer { |
1084 | my ($tr, $data) = @_; |
1085 | my $pr_args = $tr->producer_args(); |
1086 | |
1087 | # $pr_args is a hashref. |
1088 | |
5760246d |
1089 | Extra data passed to the C<producer> method is passed to |
1090 | C<producer_args>: |
0f3778d0 |
1091 | |
1092 | $tr->producer("xSV", delimiter => ',\s*'); |
1093 | |
1094 | # In SQL::Translator::Producer::xSV: |
1095 | my $args = $tr->producer_args; |
1096 | my $delimiter = $args->{'delimiter'}; # value is ,\s* |
1097 | |
5760246d |
1098 | =head2 parser |
0f3778d0 |
1099 | |
5760246d |
1100 | The C<parser> method defines or retrieves a subroutine that will be |
0f3778d0 |
1101 | called to perform the parsing. The basic idea is the same as that of |
5760246d |
1102 | C<producer> (see above), except the default subroutine name is |
ca251f03 |
1103 | "parse", and will be invoked as C<$module_name::parse($tr, $data)>. |
0f3778d0 |
1104 | Also, the parser subroutine will be passed a string containing the |
1105 | entirety of the data to be parsed. |
1106 | |
1107 | # Invokes SQL::Translator::Parser::MySQL::parse() |
1108 | $tr->parser("MySQL"); |
1109 | |
1110 | # Invokes My::Groovy::Parser::parse() |
1111 | $tr->parser("My::Groovy::Parser"); |
1112 | |
1113 | # Invoke an anonymous subroutine directly |
1114 | $tr->parser(sub { |
1115 | my $dumper = Data::Dumper->new([ $_[1] ], [ "SQL" ]); |
1116 | $dumper->Purity(1)->Terse(1)->Deepcopy(1); |
1117 | return $dumper->Dump; |
1118 | }); |
1119 | |
5760246d |
1120 | There is also C<parser_type> and C<parser_args>, which perform |
1121 | analogously to C<producer_type> and C<producer_args> |
0f3778d0 |
1122 | |
185c34d5 |
1123 | =head2 filters |
1124 | |
1125 | Set or retreive the filters to run over the schema during the |
1126 | translation, before the producer creates its output. Filters are sub |
1127 | routines called, in order, with the schema object to filter as the 1st |
44eb9098 |
1128 | arg and a hash of options (passed as a list) for the rest of the args. |
1129 | They are free to do whatever they want to the schema object, which will be |
1130 | handed to any following filters, then used by the producer. |
185c34d5 |
1131 | |
1132 | Filters are set as an array, which gives the order they run in. |
1133 | Like parsers and producers, they can be defined by a module name, a |
1134 | module name relative to the SQL::Translator::Filter namespace, a module |
1135 | name and function name together or a reference to an anonymous subroutine. |
1136 | When using a module name a function called C<filter> will be invoked in |
44eb9098 |
1137 | that package to do the work. |
1138 | |
1139 | To pass args to the filter set it as an array ref with the 1st value giving |
1140 | the filter (name or sub) and the rest its args. e.g. |
185c34d5 |
1141 | |
1142 | $tr->filters( |
1143 | sub { |
1144 | my $schema = shift; |
1145 | # Do stuff to schema here! |
1146 | }, |
44eb9098 |
1147 | DropFKeys, |
1148 | [ "Names", table => 'lc' ], |
1149 | [ "Foo", foo => "bar", hello => "world" ], |
1150 | [ "Filter5" ], |
185c34d5 |
1151 | ); |
1152 | |
44eb9098 |
1153 | Although you normally set them in the constructor, which calls |
185c34d5 |
1154 | through to filters. i.e. |
1155 | |
1156 | my $translator = SQL::Translator->new( |
1157 | ... |
1158 | filters => [ |
1159 | sub { ... }, |
44eb9098 |
1160 | [ "Names", table => 'lc' ], |
185c34d5 |
1161 | ], |
1162 | ... |
1163 | ); |
1164 | |
1165 | See F<t/36-filters.t> for more examples. |
1166 | |
1167 | Multiple set calls to filters are cumulative with new filters added to |
1168 | the end of the current list. |
1169 | |
1170 | Returns the filters as a list of array refs, the 1st value being a |
44eb9098 |
1171 | reference to the filter sub and the rest its args. |
185c34d5 |
1172 | |
5760246d |
1173 | =head2 show_warnings |
0f3778d0 |
1174 | |
1175 | Toggles whether to print warnings of name conflicts, identifier |
1176 | mutations, etc. Probably only generated by producers to let the user |
1177 | know when something won't translate very smoothly (e.g., MySQL "enum" |
1178 | fields into Oracle). Accepts a true or false value, returns the |
1179 | current value. |
1180 | |
5760246d |
1181 | =head2 translate |
0f3778d0 |
1182 | |
185c34d5 |
1183 | The C<translate> method calls the subroutine referenced by the |
1184 | C<parser> data member, then calls any C<filters> and finally calls |
1185 | the C<producer> sub routine (these members are described above). |
1186 | It accepts as arguments a number of things, in key => value format, |
1187 | including (potentially) a parser and a producer (they are passed |
1188 | directly to the C<parser> and C<producer> methods). |
0f3778d0 |
1189 | |
5760246d |
1190 | Here is how the parameter list to C<translate> is parsed: |
0f3778d0 |
1191 | |
1192 | =over |
1193 | |
1194 | =item * |
1195 | |
1196 | 1 argument means it's the data to be parsed; which could be a string |
ca251f03 |
1197 | (filename) or a reference to a scalar (a string stored in memory), or a |
0f3778d0 |
1198 | reference to a hash, which is parsed as being more than one argument |
1199 | (see next section). |
1200 | |
1201 | # Parse the file /path/to/datafile |
1202 | my $output = $tr->translate("/path/to/datafile"); |
1203 | |
1204 | # Parse the data contained in the string $data |
1205 | my $output = $tr->translate(\$data); |
1206 | |
1207 | =item * |
1208 | |
1209 | More than 1 argument means its a hash of things, and it might be |
1210 | setting a parser, producer, or datasource (this key is named |
1211 | "filename" or "file" if it's a file, or "data" for a SCALAR reference. |
1212 | |
1213 | # As above, parse /path/to/datafile, but with different producers |
1214 | for my $prod ("MySQL", "XML", "Sybase") { |
1215 | print $tr->translate( |
1216 | producer => $prod, |
1217 | filename => "/path/to/datafile", |
1218 | ); |
1219 | } |
1220 | |
1221 | # The filename hash key could also be: |
1222 | datasource => \$data, |
1223 | |
1224 | You get the idea. |
1225 | |
1226 | =back |
1227 | |
5760246d |
1228 | =head2 filename, data |
0f3778d0 |
1229 | |
5760246d |
1230 | Using the C<filename> method, the filename of the data to be parsed |
1231 | can be set. This method can be used in conjunction with the C<data> |
1232 | method, below. If both the C<filename> and C<data> methods are |
1233 | invoked as mutators, the data set in the C<data> method is used. |
0f3778d0 |
1234 | |
1235 | $tr->filename("/my/data/files/create.sql"); |
1236 | |
1237 | or: |
1238 | |
1239 | my $create_script = do { |
1240 | local $/; |
1241 | open CREATE, "/my/data/files/create.sql" or die $!; |
1242 | <CREATE>; |
1243 | }; |
1244 | $tr->data(\$create_script); |
1245 | |
5760246d |
1246 | C<filename> takes a string, which is interpreted as a filename. |
1247 | C<data> takes a reference to a string, which is used as the data to be |
0f3778d0 |
1248 | parsed. If a filename is set, then that file is opened and read when |
5760246d |
1249 | the C<translate> method is called, as long as the data instance |
0f3778d0 |
1250 | variable is not set. |
1251 | |
45ee6be0 |
1252 | =head2 schema |
1253 | |
1254 | Returns the SQL::Translator::Schema object. |
1255 | |
5760246d |
1256 | =head2 trace |
0f3778d0 |
1257 | |
1258 | Turns on/off the tracing option of Parse::RecDescent. |
1259 | |
389b318c |
1260 | =head2 validate |
1261 | |
1262 | Whether or not to validate the schema object after parsing and before |
1263 | producing. |
1264 | |
c314ec98 |
1265 | =head2 version |
1266 | |
1267 | Returns the version of the SQL::Translator release. |
1268 | |
7a8e1f51 |
1269 | =head1 AUTHORS |
16dc9970 |
1270 | |
c734e9e6 |
1271 | See the included AUTHORS file: |
1272 | L<http://search.cpan.org/dist/SQL-Translator/AUTHORS> |
841a3f1a |
1273 | |
1274 | If you would like to contribute to the project, you can send patches |
1275 | to the developers mailing list: |
1276 | |
1277 | sqlfairy-developers@lists.sourceforge.net |
1278 | |
1279 | Or send us a message (with your Sourceforge username) asking to be |
1280 | added to the project and what you'd like to contribute. |
1281 | |
dfb4c915 |
1282 | |
ca10f295 |
1283 | =head1 COPYRIGHT |
16dc9970 |
1284 | |
ca10f295 |
1285 | This program is free software; you can redistribute it and/or modify |
1286 | it under the terms of the GNU General Public License as published by |
1287 | the Free Software Foundation; version 2. |
dfb4c915 |
1288 | |
ca10f295 |
1289 | This program is distributed in the hope that it will be useful, but |
1290 | WITHOUT ANY WARRANTY; without even the implied warranty of |
1291 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
1292 | General Public License for more details. |
16dc9970 |
1293 | |
ca10f295 |
1294 | You should have received a copy of the GNU General Public License |
1295 | along with this program; if not, write to the Free Software |
1296 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
1297 | USA |
16dc9970 |
1298 | |
87bf8a3a |
1299 | =head1 BUGS |
1300 | |
841a3f1a |
1301 | Please use L<http://rt.cpan.org/> for reporting bugs. |
1302 | |
1303 | =head1 PRAISE |
1304 | |
1305 | If you find this module useful, please use |
1306 | L<http://cpanratings.perl.org/rate/?distribution=SQL-Translator> to rate it. |
87bf8a3a |
1307 | |
16dc9970 |
1308 | =head1 SEE ALSO |
1309 | |
abfa405a |
1310 | L<perl>, |
1311 | L<SQL::Translator::Parser>, |
1312 | L<SQL::Translator::Producer>, |
389b318c |
1313 | L<Parse::RecDescent>, |
1314 | L<GD>, |
1315 | L<GraphViz>, |
1316 | L<Text::RecordParser>, |
841a3f1a |
1317 | L<Class::DBI>, |
389b318c |
1318 | L<XML::Writer>. |