/usr/share/perl5/Config/General/Extended.pm is in libconfig-general-perl 2.60-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 | #
# Config::General::Extended - special Class based on Config::General
#
# Copyright (c) 2000-2014 Thomas Linden <tlinden |AT| cpan.org>.
# All Rights Reserved. Std. disclaimer applies.
# Artistic License, same as perl itself. Have fun.
#
# namespace
package Config::General::Extended;
# yes we need the hash support of new() in 1.18 or higher!
use Config::General 1.18;
use FileHandle;
use Carp;
use Exporter ();
use vars qw(@ISA @EXPORT);
# inherit new() and so on from Config::General
@ISA = qw(Config::General Exporter);
use strict;
$Config::General::Extended::VERSION = "2.07";
sub new {
croak "Deprecated method Config::General::Extended::new() called.\n"
."Use Config::General::new() instead and set the -ExtendedAccess flag.\n";
}
sub getbypath {
my ($this, $path) = @_;
my $xconfig = $this->{config};
$path =~ s#^/##;
$path =~ s#/$##;
my @pathlist = split /\//, $path;
my $index;
foreach my $element (@pathlist) {
if($element =~ /^([^\[]*)\[(\d+)\]$/) {
$element = $1;
$index = $2;
}
else {
$index = undef;
}
if(ref($xconfig) eq "ARRAY") {
return {};
}
elsif (! exists $xconfig->{$element}) {
return {};
}
if(ref($xconfig->{$element}) eq "ARRAY") {
if(! defined($index) ) {
#croak "$element is an array but you didn't specify an index to access it!\n";
$xconfig = $xconfig->{$element};
}
else {
if(exists $xconfig->{$element}->[$index]) {
$xconfig = $xconfig->{$element}->[$index];
}
else {
croak "$element doesn't have an element with index $index!\n";
}
}
}
else {
$xconfig = $xconfig->{$element};
}
}
return $xconfig;
}
sub obj {
#
# returns a config object from a given key
# or from the current config hash if the $key does not exist
# or an empty object if the content of $key is empty.
#
my($this, $key) = @_;
# just create the empty object, just in case
my $empty = $this->SUPER::new( -ExtendedAccess => 1, -ConfigHash => {}, %{$this->{Params}} );
if (exists $this->{config}->{$key}) {
if (!$this->{config}->{$key}) {
# be cool, create an empty object!
return $empty
}
elsif (ref($this->{config}->{$key}) eq "ARRAY") {
my @objlist;
foreach my $element (@{$this->{config}->{$key}}) {
if (ref($element) eq "HASH") {
push @objlist,
$this->SUPER::new( -ExtendedAccess => 1,
-ConfigHash => $element,
%{$this->{Params}} );
}
else {
if ($this->{StrictObjects}) {
croak "element in list \"$key\" does not point to a hash reference!\n";
}
# else: skip this element
}
}
return \@objlist;
}
elsif (ref($this->{config}->{$key}) eq "HASH") {
return $this->SUPER::new( -ExtendedAccess => 1,
-ConfigHash => $this->{config}->{$key}, %{$this->{Params}} );
}
else {
# nothing supported
if ($this->{StrictObjects}) {
croak "key \"$key\" does not point to a hash reference!\n";
}
else {
# be cool, create an empty object!
return $empty;
}
}
}
else {
# even return an empty object if $key does not exist
return $empty;
}
}
sub value {
#
# returns a value of the config hash from a given key
# this can be a hashref or a scalar
#
my($this, $key, $value) = @_;
if (defined $value) {
$this->{config}->{$key} = $value;
}
else {
if (exists $this->{config}->{$key}) {
return $this->{config}->{$key};
}
else {
if ($this->{StrictObjects}) {
croak "Key \"$key\" does not exist within current object\n";
}
else {
return "";
}
}
}
}
sub hash {
#
# returns a value of the config hash from a given key
# as hash
#
my($this, $key) = @_;
if (exists $this->{config}->{$key}) {
return %{$this->{config}->{$key}};
}
else {
if ($this->{StrictObjects}) {
croak "Key \"$key\" does not exist within current object\n";
}
else {
return ();
}
}
}
sub array {
#
# returns a value of the config hash from a given key
# as array
#
my($this, $key) = @_;
if (exists $this->{config}->{$key}) {
return @{$this->{config}->{$key}};
}
if ($this->{StrictObjects}) {
croak "Key \"$key\" does not exist within current object\n";
}
else {
return ();
}
}
sub is_hash {
#
# return true if the given key contains a hashref
#
my($this, $key) = @_;
if (exists $this->{config}->{$key}) {
if (ref($this->{config}->{$key}) eq "HASH") {
return 1;
}
else {
return;
}
}
else {
return;
}
}
sub is_array {
#
# return true if the given key contains an arrayref
#
my($this, $key) = @_;
if (exists $this->{config}->{$key}) {
if (ref($this->{config}->{$key}) eq "ARRAY") {
return 1;
}
else {
return;
}
}
else {
return;
}
}
sub is_scalar {
#
# returns true if the given key contains a scalar(or number)
#
my($this, $key) = @_;
if (exists $this->{config}->{$key} && !ref($this->{config}->{$key})) {
return 1;
}
return;
}
sub exists {
#
# returns true if the key exists
#
my($this, $key) = @_;
if (exists $this->{config}->{$key}) {
return 1;
}
else {
return;
}
}
sub keys {
#
# returns all keys under in the hash of the specified key, if
# it contains keys (so it must be a hash!)
#
my($this, $key) = @_;
if (!$key) {
if (ref($this->{config}) eq "HASH") {
return map { $_ } keys %{$this->{config}};
}
else {
return ();
}
}
elsif (exists $this->{config}->{$key} && ref($this->{config}->{$key}) eq "HASH") {
return map { $_ } keys %{$this->{config}->{$key}};
}
else {
return ();
}
}
sub delete {
#
# delete the given key from the config, if any
# and return what is deleted (just as 'delete $hash{key}' does)
#
my($this, $key) = @_;
if (exists $this->{config}->{$key}) {
return delete $this->{config}->{$key};
}
else {
return undef;
}
}
sub configfile {
#
# sets or returns the config filename
#
my($this,$file) = @_;
if ($file) {
$this->{configfile} = $file;
}
return $this->{configfile};
}
sub find {
my $this = shift;
my $key = shift;
return undef unless $this->exists($key);
if (@_) {
return $this->obj($key)->find(@_);
}
else {
return $this->obj($key);
}
}
sub AUTOLOAD {
#
# returns the representing value, if it is a scalar.
#
my($this, $value) = @_;
my $key = $Config::General::Extended::AUTOLOAD; # get to know how we were called
$key =~ s/.*:://; # remove package name!
if (defined $value) {
# just set $key to $value!
$this->{config}->{$key} = $value;
}
elsif (exists $this->{config}->{$key}) {
if ($this->is_hash($key)) {
croak "Key \"$key\" points to a hash and cannot be automatically accessed\n";
}
elsif ($this->is_array($key)) {
croak "Key \"$key\" points to an array and cannot be automatically accessed\n";
}
else {
return $this->{config}->{$key};
}
}
else {
if ($this->{StrictObjects}) {
croak "Key \"$key\" does not exist within current object\n";
}
else {
# be cool
return undef; # bugfix rt.cpan.org#42331
}
}
}
sub DESTROY {
my $this = shift;
$this = ();
}
# keep this one
1;
=head1 NAME
Config::General::Extended - Extended access to Config files
=head1 SYNOPSIS
use Config::General;
$conf = Config::General->new(
-ConfigFile => 'configfile',
-ExtendedAccess => 1
);
=head1 DESCRIPTION
This is an internal module which makes it possible to use object
oriented methods to access parts of your config file.
Normally you don't call it directly.
=head1 METHODS
=over
=item configfile('filename')
Set the filename to be used by B<save> to "filename". It returns the current
configured filename if called without arguments.
=item obj('key')
Returns a new object (of Config::General::Extended Class) from the given key.
Short example:
Assume you have the following config:
<individual>
<martin>
age 23
</martin>
<joseph>
age 56
</joseph>
</individual>
<other>
blah blubber
blah gobble
leer
</other>
and already read it in using B<Config::General::Extended::new()>, then you can get a
new object from the "individual" block this way:
$individual = $conf->obj("individual");
Now if you call B<getall> on I<$individual> (just for reference) you would get:
$VAR1 = (
martin => { age => 13 }
);
Or, here is another use:
my $individual = $conf->obj("individual");
foreach my $person ($conf->keys("individual")) {
$man = $individual->obj($person);
print "$person is " . $man->value("age") . " years old\n";
}
See the discussion on B<hash()> and B<value()> below.
If the key from which you want to create a new object is empty, an empty
object will be returned. If you run the following on the above config:
$obj = $conf->obj("other")->obj("leer");
Then $obj will be empty, just like if you have had run this:
$obj = Config::General::Extended->new( () );
Read operations on this empty object will return nothing or even fail.
But you can use an empty object for I<creating> a new config using write
operations, i.e.:
$obj->someoption("value");
See the discussion on B<AUTOLOAD METHODS> below.
If the key points to a list of hashes, a list of objects will be
returned. Given the following example config:
<option>
name = max
</option>
<option>
name = bea
</option>
you could write code like this to access the list the OOP way:
my $objlist = $conf->obj("option");
foreach my $option (@{$objlist}) {
print $option->name;
}
Please note that the list will be returned as a reference to an array.
Empty elements or non-hash elements of the list, if any, will be skipped.
=item hash('key')
This method returns a hash(if it B<is> one!) from the config which is referenced by
"key". Given the sample config above you would get:
my %sub_hash = $conf->hash("individual");
print Dumper(\%sub_hash);
$VAR1 = {
martin => { age => 13 }
};
=item array('key')
This the equivalent of B<hash()> mentioned above, except that it returns an array.
Again, we use the sample config mentioned above:
$other = $conf->obj("other");
my @blahs = $other->array("blah");
print Dumper(\@blahs);
$VAR1 = [ "blubber", "gobble" ];
=item value('key')
This method returns the scalar value of a given key. Given the following sample
config:
name = arthur
age = 23
you could do something like that:
print $conf->value("name") . " is " . $conf->value("age") . " years old\n";
You can use this method also to set the value of "key" to something if you give over
a hash reference, array reference or a scalar in addition to the key. An example:
$conf->value("key", \%somehash);
# or
$conf->value("key", \@somearray);
# or
$conf->value("key", $somescalar);
Please note, that this method does not complain about existing values within "key"!
=item is_hash('key') is_array('key') is_scalar('key')
As seen above, you can access parts of your current config using hash, array or scalar
methods. But you are right if you guess, that this might become problematic, if
for example you call B<hash()> on a key which is in real not a hash but a scalar. Under
normal circumstances perl would refuse this and die.
To avoid such behavior you can use one of the methods is_hash() is_array() is_scalar() to
check if the value of "key" is really what you expect it to be.
An example(based on the config example from above):
if($conf->is_hash("individual") {
$individual = $conf->obj("individual");
}
else {
die "You need to configure a "individual" block!\n";
}
=item exists('key')
This method returns just true if the given key exists in the config.
=item keys('key')
Returns an array of the keys under the specified "key". If you use the example
config above you could do that:
print Dumper($conf->keys("individual");
$VAR1 = [ "martin", "joseph" ];
If no key name was supplied, then the keys of the object itself will be returned.
You can use this method in B<foreach> loops as seen in an example above(obj() ).
=item delete('key')
This method removes the given key and all associated data from the internal
hash structure. If 'key' contained data, then this data will be returned,
otherwise undef will be returned.
=item find(@list)
Given a list of nodes, ->find will search for a tree that branches in
just this way, returning the Config::General::Extended object it finds
at the bottom if it exists. You can also search partway down the tree
and ->find should return where you left off.
For example, given the values B<find (qw (A B C))> and the following
tree (</end> tags omitted for brevity):
<A>
<FOO>
...
<B>
<BAZ>
...
<C>
BAR = shoo
B<find()> will find the object at I<C> with the value BAR = shoo and
return it.
=back
=head1 AUTOLOAD METHODS
Another useful feature is implemented in this class using the B<AUTOLOAD> feature
of perl. If you know the keynames of a block within your config, you can access to
the values of each individual key using the method notation. See the following example
and you will get it:
We assume the following config:
<person>
name = Moser
prename = Peter
birth = 12.10.1972
</person>
Now we read it in and process it:
my $conf = Config::General::Extended->new("configfile");
my $person = $conf->obj("person");
print $person->prename . " " . $person->name . " is " . $person->age . " years old\n";
This notation supports only scalar values! You need to make sure, that the block
<person> does not contain any subblock or multiple identical options(which will become
an array after parsing)!
If you access a non-existent key this way, Config::General will croak an error.
You can turn this behavior off by setting B<-StrictObjects> to 0 or "no". In
this case undef will be returned.
Of course you can use this kind of methods for writing data too:
$person->name("Neustein");
This changes the value of the "name" key to "Neustein". This feature behaves exactly like
B<value()>, which means you can assign hash or array references as well and that existing
values under the given key will be overwritten.
=head1 COPYRIGHT
Copyright (c) 2000-2014 Thomas Linden
This library is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 BUGS
none known yet.
=head1 AUTHOR
Thomas Linden <tlinden |AT| cpan.org>
=head1 VERSION
2.07
=cut
|