1Rose::Object::MakeMethoUdsse:r:GCeonnetrriicb(u3t)ed PerRlosDeo:c:uOmbejnetcatt:i:oMnakeMethods::Generic(3)
2
6 Rose::Object::MakeMethods::Generic - Create simple object methods.
7
9 package MyObject;
10 use Rose::Object::MakeMethods::Generic
12 (
13 scalar =>
14 [
15 'power',
16 'error',
17 ],
18 'scalar --get_set_init' => 'name',
20 'boolean --get_set_init' => 'is_tall',
22 boolean =>
24 [
25 'is_red',
26 'is_happy' => { default => 1 },
27 ],
28 array =>
30 [
31 jobs => {},
32 job => { interface => 'get_set_item', hash_key => 'jobs' },
33 clear_jobs => { interface => 'clear', hash_key => 'jobs' },
34 reset_jobs => { interface => 'reset', hash_key => 'jobs' },
35 ],
36 hash =>
38 [
39 param => { hash_key => 'params' },
40 params => { interface => 'get_set_all' },
41 param_names => { interface => 'keys', hash_key => 'params' },
42 param_values => { interface => 'values', hash_key => 'params' },
43 param_exists => { interface => 'exists', hash_key => 'params' },
44 delete_param => { interface => 'delete', hash_key => 'params' },
45 clear_params => { interface => 'clear', hash_key => 'params' },
47 reset_params => { interface => 'reset', hash_key => 'params' },
48 ],
49 );
50 sub init_name { 'Fred' }
52 sub init_is_tall { 1 }
53 ...
54 $obj = MyObject->new(power => 5);
56 print $obj->name; # Fred
58 $obj->do_something or die $obj->error;
60 $obj->is_tall; # true
62 $obj->is_tall(undef); # false (but defined)
63 $obj->is_tall; # false (but defined)
64 $obj->is_red; # undef
66 $obj->is_red(1234); # true
67 $obj->is_red(''); # false (but defined)
68 $obj->is_red; # false (but defined)
69 $obj->is_happy; # true
71 $obj->params(a => 1, b => 2); # add pairs
73 $val = $obj->param('b'); # 2
74 $obj->param_exists('x'); # false
75 $obj->jobs('butcher', 'baker'); # add values
77 $obj->job(0 => 'sailor'); # set value
78 $job = $obj->job(0); # 'sailor'
79
81 Rose::Object::MakeMethods::Generic is a method maker that inherits from
82 Rose::Object::MakeMethods. See the Rose::Object::MakeMethods
83 documentation to learn about the interface. The method types provided
84 by this module are described below. All methods work only with hash-
85 based objects.
86
88 scalar
89 Create get/set methods for scalar attributes.
90 Options
92 "hash_key"
93 The key inside the hash-based object to use for the storage
94 of this attribute. Defaults to the name of the method.
95 "init_method"
97 The name of the method to call when initializing the value
98 of an undefined attribute. This option is only applicable
99 when using the "get_set_init" interface. Defaults to the
100 method name with the prefix "init_" added.
101 "interface"
103 Choose one of the two possible interfaces. Defaults to
104 "get_set".
105 Interfaces
107 "get_set"
108 Creates a simple get/set accessor method for an object
109 attribute. When called with an argument, the value of the
110 attribute is set. The current value of the attribute is
111 returned.
112 "get_set_init"
114 Behaves like the "get_set" interface unless the value of
115 the attribute is undefined. In that case, the method
116 specified by the "init_method" option is called and the
117 attribute is set to the return value of that method.
118 Example:
120 package MyObject;
122 use Rose::Object::MakeMethods::Generic
124 (
125 scalar => 'power',
126 'scalar --get_set_init' => 'name',
127 );
128 sub init_name { 'Fred' }
130 ...
131 $obj->power(99); # returns 99
133 $obj->name; # returns "Fred"
134 $obj->name('Bill'); # returns "Bill"
135 boolean
137 Create get/set methods for boolean attributes. For each argument
138 to these methods, the only thing that matters is whether it
139 evaluates to true or false. The return value is either, true,
140 false (but defined), or undef if the value has never been set.
141 Options
143 "default"
144 Determines the default value of the attribute. This option
145 is only applicable when using the "get_set" interface.
146 "hash_key"
148 The key inside the hash-based object to use for the storage
149 of this attribute. Defaults to the name of the method.
150 "init_method"
152 The name of the method to call when initializing the value
153 of an undefined attribute. Again, the only thing that
154 matters about the return value of this method is whether or
155 not it is true or false. This option is only applicable
156 when using the "get_set_init" interface. Defaults to the
157 method name with the prefix "init_" added.
158 "interface"
160 Choose one of the two possible interfaces. Defaults to
161 "get_set".
162 Interfaces
164 "get_set"
165 Creates a simple get/set accessor method for a boolean
166 object attribute. When called with an argument, the value
167 of the attribute is set to true if the argument evaluates
168 to true, false (but defined) otherwise. The current value
169 of the attribute is returned.
170 If Class::XSAccessor version 0.14 or later is installed and
172 the "ROSE_OBJECT_NO_CLASS_XSACCESOR" environment variable
173 is not set to a true value, then Class::XSAccessor will be
174 used to generated the method.
175 "get_set_init"
177 Behaves like the "get_set" interface unless the value of
178 the attribute is undefined. In that case, the method
179 specified by the "init_method" option is called and the
180 attribute is set based on the boolean value of the return
181 value of that method.
182 Example:
184 package MyObject;
186 use Rose::Object::MakeMethods::Generic
188 (
189 'boolean --get_set_init' => 'is_tall',
190 boolean =>
192 [
193 'is_red',
194 'is_happy' => { default => 1 },
195 ],
196 );
197 sub init_is_tall { 'blah' }
199 ...
200 $obj->is_tall; # returns true
202 $obj->is_tall(undef); # returns false (but defined)
203 $obj->is_tall; # returns false (but defined)
204 $obj->is_red; # returns undef
206 $obj->is_red(1234); # returns true
207 $obj->is_red(''); # returns false (but defined)
208 $obj->is_red; # returns false (but defined)
209 $obj->is_happy; # returns true
211 hash
213 Create methods to manipulate hash attributes.
214 Options
216 "hash_key"
217 The key inside the hash-based object to use for the storage
218 of this attribute. Defaults to the name of the method.
219 "init_method"
221 The name of the method to call when initializing the value
222 of an undefined hash attribute. This method should
223 return a reference to a hash, and is only applicable when
224 using the "get_set_init" interface. Defaults to the method
225 name with the prefix "init_" added.
226 "interface"
228 Choose which interface to use. Defaults to "get_set".
229 Interfaces
231 "get_set"
232 If called with no arguments, returns a list of key/value
233 pairs in list context or a reference to the actual hash
234 stored by the object in scalar context.
235 If called with one argument, and that argument is a
237 reference to a hash, that hash reference is used as the new
238 value for the attribute. Returns a list of key/value pairs
239 in list context or a reference to the actual hash stored by
240 the object in scalar context.
241 If called with one argument, and that argument is a
243 reference to an array, then a list of the hash values for
244 each key in the array is returned.
245 If called with one argument, and it is not a reference to a
247 hash or an array, then the hash value for that key is
248 returned.
249 If called with an even number of arguments, they are taken
251 as name/value pairs and are added to the hash. It then
252 returns a list of key/value pairs in list context or a
253 reference to the actual hash stored by the object in scalar
254 context.
255 Passing an odd number of arguments greater than 1 causes a
257 fatal error.
258 "get_set_init"
260 Behaves like the "get_set" interface unless the attribute
261 is undefined. In that case, the method specified by the
262 "init_method" option is called and the attribute is set to
263 the return value of that method, which should be a
264 reference to a hash.
265 "get_set_inited"
267 Behaves like the "get_set" interface unless the attribute
268 is undefined. In that case, it is initialized to an empty
269 hash before proceeding as usual.
270 "get_set_all"
272 If called with no arguments, returns a list of key/value
273 pairs in list context or a reference to the actual hash
274 stored by the object in scalar context.
275 If called with one argument, and that argument is a
277 reference to a hash, that hash reference is used as the new
278 value for the attribute. Returns a list of key/value pairs
279 in list context or a reference to the actual hash stored by
280 the object in scalar context.
281 Otherwise, the hash is emptied and the arguments are taken
283 as name/value pairs that are then added to the hash. It
284 then returns a list of key/value pairs in list context or a
285 reference to the actual hash stored by the object in scalar
286 context.
287 "get_set_init_all"
289 Behaves like the "get_set_all" interface unless the
290 attribute is undefined. In that case, the method specified
291 by the "init_method" option is called and the attribute is
292 set to the return value of that method, which should be a
293 reference to a hash.
294 "clear"
296 Sets the attribute to an empty hash.
297 "reset"
299 Sets the attribute to undef.
300 "delete"
302 Deletes the key(s) passed as arguments. Failure to pass
303 any arguments causes a fatal error.
304 "exists"
306 Returns true of the argument exists in the hash, false
307 otherwise. Failure to pass an argument or passing more than
308 one argument causes a fatal error.
309 "keys"
311 Returns the keys of the hash in list context, or a
312 reference to an array of the keys of the hash in scalar
313 context. The keys are not sorted.
314 "names"
316 An alias for the "keys" interface.
317 "values"
319 Returns the values of the hash in list context, or a
320 reference to an array of the values of the hash in scalar
321 context. The values are not sorted.
322 Example:
324 package MyObject;
326 use Rose::Object::MakeMethods::Generic
328 (
329 hash =>
330 [
331 param => { hash_key =>'params' },
332 params => { interface=>'get_set_all' },
333 param_names => { interface=>'keys', hash_key=>'params' },
334 param_values => { interface=>'values', hash_key=>'params' },
335 param_exists => { interface=>'exists', hash_key=>'params' },
336 delete_param => { interface=>'delete', hash_key=>'params' },
337 clear_params => { interface=>'clear', hash_key=>'params' },
339 reset_params => { interface=>'reset', hash_key=>'params' },
340 ],
341 );
342 ...
343 $obj = MyObject->new;
345 $obj->params; # undef
347 $obj->params(a => 1, b => 2); # add pairs
349 $val = $obj->param('b'); # 2
350 %params = $obj->params; # copy hash keys and values
352 $params = $obj->params; # get hash ref
353 $obj->params({ c => 3, d => 4 }); # replace contents
355 $obj->param_exists('a'); # false
357 $keys = join(',', sort $obj->param_names); # 'c,d'
359 $vals = join(',', sort $obj->param_values); # '3,4'
360 $obj->delete_param('c');
362 $obj->param(f => 7, g => 8);
363 $vals = join(',', sort $obj->param_values); # '4,7,8'
365 $obj->clear_params;
367 $params = $obj->params; # empty hash
368 $obj->reset_params;
370 $params = $obj->params; # undef
371 array
373 Create methods to manipulate array attributes.
374 Options
376 "hash_key"
377 The key inside the hash-based object to use for the storage
378 of this attribute. Defaults to the name of the method.
379 "init_method"
381 The name of the method to call when initializing the value
382 of an undefined array attribute. This method should
383 return a reference to an array. This option is only
384 applicable when using the "get_set_init", "push", and "add"
385 interfaces. When using the "get_set_init" interface,
386 "init_method" defaults to the method name with the prefix
387 "init_" added.
388 "interface"
390 Choose which interface to use. Defaults to "get_set".
391 Interfaces
393 "get_set"
394 If called with no arguments, returns the array contents in
395 list context or a reference to the actual array stored by
396 the object in scalar context.
397 If called with one argument, and that argument is a
399 reference to an array, that array reference is used as the
400 new value for the attribute. Returns the array contents in
401 list context or a reference to the actual array stored by
402 the object in scalar context.
403 If called with one argument, and that argument is not a
405 reference to an array, or if called with more than one
406 argument, then the array contents are replaced by the
407 arguments. Returns the array contents in list context or a
408 reference to the actual array stored by the object in
409 scalar context.
410 "get_set_init"
412 Behaves like the "get_set" interface unless the attribute
413 is undefined. In that case, the method specified by the
414 "init_method" option is called and the attribute is set to
415 the return value of that method, which should be a
416 reference to an array.
417 "get_set_inited"
419 Behaves like the "get_set" interface unless the attribute
420 is undefined. In that case, it is initialized to an empty
421 array before proceeding as usual.
422 "get_set_item"
424 If called with one argument, returns the item at that array
425 index.
426 If called with two arguments, sets the item at the array
428 index specified by the first argument to the value
429 specified by the second argument.
430 Failure to pass any arguments causes a fatal error.
432 "exists"
434 Returns true of the argument exists in the hash, false
435 otherwise. Failure to pass an argument or passing more than
436 one argument causes a fatal error.
437 "add"
439 An alias for the "push" interface.
440 "push"
442 If called with a list or a reference to an array, the
443 contents of the list or referenced array are added to the
444 end of the array. If called with no arguments, a fatal
445 error will occur.
446 "pop"
448 Remove an item from the end of the array and returns it.
449 If an integer argument is passed, then that number of items
450 is removed and returned. Otherwise, just one is removed and
451 returned.
452 "shift"
454 Remove an item from the start of the array and returns it.
455 If an integer argument is passed, then that number of items
456 is removed and returned. Otherwise, just one is removed and
457 returned.
458 "unshift"
460 If called with a list or a reference to an array, the
461 contents of the list or referenced array are added to the
462 start of the array. If called with no arguments, a fatal
463 error will occur.
464 "clear"
466 Sets the attribute to an empty array.
467 "reset"
469 Sets the attribute to undef.
470 Example:
472 package MyObject;
474 use Rose::Object::MakeMethods::Generic
476 (
477 array =>
478 [
479 jobs => {},
480 job => { interface => 'get_set_item',
481 hash_key => 'jobs' },
482 clear_jobs => { interface => 'clear', hash_key => 'jobs' },
483 reset_jobs => { interface => 'reset', hash_key => 'jobs' },
484 ],
485 );
486 ...
487 $obj = MyObject->new;
489 $jobs = $obj->jobs; # undef
491 $obj->clear_jobs();
493 $jobs = $obj->jobs; # ref to empty array
494 $obj->jobs('butcher', 'baker'); # add values
496 $vals = join(',', $obj->jobs); # 'butcher,baker'
497 $obj->jobs([ 'candlestick', 'maker' ]); # replace values
499 $vals = join(',', $obj->jobs); # 'candlestick,maker'
501 $job = $obj->job(0); # 'candlestick'
503 $obj->job(0 => 'sailor'); # set value
504 $job = $obj->job(0); # 'sailor'
505 $obj->reset_jobs;
507 $jobs = $obj->jobs; # undef
508
510 John C. Siracusa (siracusa@gmail.com)
511
513 Copyright (c) 2010 by John C. Siracusa. All rights reserved. This
514 program is free software; you can redistribute it and/or modify it
515 under the same terms as Perl itself.
516perl v5.32.0 2020-07-R2o8se::Object::MakeMethods::Generic(3)