| 1 |
## --------------------------------------------------------------------------- |
| 2 |
## $Id: Deep.pm,v 1.7 2003/01/19 03:26:59 joko Exp $ |
| 3 |
## --------------------------------------------------------------------------- |
| 4 |
## $Log: Deep.pm,v $ |
| 5 |
## Revision 1.7 2003/01/19 03:26:59 joko |
| 6 |
## + added 'sub deep_copy' - refactored from libp |
| 7 |
## + add 'sub merge' - exported from CPAN's 'Hash::Merge' |
| 8 |
## |
| 9 |
## Revision 1.6 2002/12/23 11:27:53 jonen |
| 10 |
## + changed behavior WATCH! |
| 11 |
## |
| 12 |
## Revision 1.5 2002/12/16 19:57:54 joko |
| 13 |
## + option 'init' |
| 14 |
## |
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## Revision 1.4 2002/12/05 13:56:49 joko |
| 16 |
## - var_deref |
| 17 |
## + expand - more sophisticated dereferencing with callbacks using Iterate |
| 18 |
## |
| 19 |
## Revision 1.3 2002/12/03 05:34:55 joko |
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## + bugfix: now utilizing var_utf2iso from Data::Transform::Encode |
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## |
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## Revision 1.2 2002/12/01 04:44:07 joko |
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## + code from Data::Transform::OO |
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## |
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## Revision 1.1 2002/11/29 04:49:20 joko |
| 26 |
## + initial check-in |
| 27 |
## |
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## Revision 1.1 2002/10/10 03:26:00 cvsjoko |
| 29 |
## + new |
| 30 |
## --------------------------------------------------------------------------- |
| 31 |
|
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|
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package Data::Transform::Deep; |
| 34 |
|
| 35 |
use strict; |
| 36 |
use warnings; |
| 37 |
|
| 38 |
require Exporter; |
| 39 |
our @ISA = qw( Exporter ); |
| 40 |
our @EXPORT_OK = qw( |
| 41 |
&var_NumericalHashToArray |
| 42 |
&var_mixin |
| 43 |
&object2hash |
| 44 |
&hash2object |
| 45 |
&refexpr2perlref |
| 46 |
&expand |
| 47 |
&deep_copy |
| 48 |
&merge |
| 49 |
); |
| 50 |
# &var_deref |
| 51 |
# &getStructSlotByStringyAddress |
| 52 |
|
| 53 |
use attributes; |
| 54 |
use Data::Dumper; |
| 55 |
use Data::Transform::Encode qw( var_utf2iso var2utf8 scalar2utf8 ); |
| 56 |
|
| 57 |
use Hash::Merge qw( merge ); |
| 58 |
use Iterate; |
| 59 |
|
| 60 |
sub var_NumericalHashToArray { |
| 61 |
my $vref = shift; |
| 62 |
#my $context = shift; |
| 63 |
if (ref $vref eq 'HASH') { |
| 64 |
foreach (keys %{$vref}) { |
| 65 |
# if ((ref $vref->{$_}) =~ m/HASH/) { |
| 66 |
if ((ref $vref->{$_}) =~ m/HASH/) { |
| 67 |
if ($vref->{$_}{0}) { # might be a numerical-indexed array |
| 68 |
#print "000\n"; |
| 69 |
#print "context: $context\n"; |
| 70 |
my @arr; |
| 71 |
foreach my $key_numeric (sort keys %{$vref->{$_}}) { |
| 72 |
push @arr, $vref->{$_}{$key_numeric}; |
| 73 |
} |
| 74 |
$vref->{$_} = \@arr; |
| 75 |
} |
| 76 |
var_NumericalHashToArray($vref->{$_}); |
| 77 |
} |
| 78 |
# } else { |
| 79 |
# #$vref->{$_} = scalar2iso($vref->{$_}); |
| 80 |
# } |
| 81 |
} |
| 82 |
} |
| 83 |
} |
| 84 |
|
| 85 |
|
| 86 |
sub var_deref { |
| 87 |
my $obj = shift; |
| 88 |
my $options = shift; |
| 89 |
my $result; |
| 90 |
if ((ref $obj) eq 'ARRAY') { |
| 91 |
foreach (@{$obj}) { |
| 92 |
my $ref = ref $_; |
| 93 |
if ($ref) { |
| 94 |
push(@{$result}, var_deref($_, $options)); |
| 95 |
#undef $_; |
| 96 |
} else { |
| 97 |
#push(@{$result}, $_); |
| 98 |
push(@{$result}, deep_copy($_)); |
| 99 |
} |
| 100 |
#undef $_ if $options->{destroy}; |
| 101 |
#$options->{destroy}->($_) if $options->{destroy}; |
| 102 |
} |
| 103 |
# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ??? |
| 104 |
} else { |
| 105 |
foreach (keys %{$obj}) { |
| 106 |
my $key = $_; |
| 107 |
my $ref = ref $obj->{$_}; |
| 108 |
if ($ref) { |
| 109 |
$result->{$_} = var_deref($obj->{$_}, $options); |
| 110 |
#undef $obj->{$_}; |
| 111 |
} else { |
| 112 |
#$result->{$_} = $obj->{$_}; |
| 113 |
$result->{$_} = deep_copy($obj->{$_}); |
| 114 |
} |
| 115 |
#undef $obj->{$_} if $options->{destroy}; |
| 116 |
#$options->{destroy}->($obj->{$_}) if $options->{destroy}; |
| 117 |
} |
| 118 |
} |
| 119 |
#undef $obj if $options->{destroy}; |
| 120 |
$options->{cb_destroy}->($obj) if $options->{cb_destroy}; |
| 121 |
return $result; |
| 122 |
} |
| 123 |
|
| 124 |
|
| 125 |
sub expand { |
| 126 |
|
| 127 |
my $obj = shift; |
| 128 |
my $options = shift; |
| 129 |
my $result; |
| 130 |
|
| 131 |
if ((ref $obj) eq 'ARRAY') { |
| 132 |
|
| 133 |
IterArray @$obj, sub { |
| 134 |
my $item; |
| 135 |
# if current item is a reference ... |
| 136 |
if (ref $_[0]) { |
| 137 |
# ... expand structure recursively |
| 138 |
$item = expand($_[0], $options); |
| 139 |
# destroy item via seperate callback method (a POST) if requested |
| 140 |
#$options->{cb}->{destroy}->($_[0]) if $options->{destroy}; |
| 141 |
|
| 142 |
# ... assume plain scalar |
| 143 |
} else { |
| 144 |
#$item = deep_copy($_[0]); |
| 145 |
$item = $_[0]; |
| 146 |
# conversions/encodings |
| 147 |
$item = scalar2utf8($item) if ($item && $options->{utf8}); |
| 148 |
} |
| 149 |
#push(@{$result}, $item) if $item; # use item only if not undef (TODO: make configurable via $options) |
| 150 |
push(@{$result}, $item); # use item in any case |
| 151 |
|
| 152 |
} |
| 153 |
|
| 154 |
# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ??? |
| 155 |
} else { |
| 156 |
|
| 157 |
IterHash %$obj, sub { |
| 158 |
my $item; |
| 159 |
|
| 160 |
# if current item is a reference ... |
| 161 |
if (ref $_[1]) { |
| 162 |
# ... expand structure recursively |
| 163 |
$item = expand($_[1], $options); |
| 164 |
# destroy item via seperate callback method (a POST) if requested |
| 165 |
#$options->{cb}->{destroy}->($_[1]) if $options->{destroy}; |
| 166 |
|
| 167 |
# ... assume plain scalar |
| 168 |
} else { |
| 169 |
#$item = deep_copy($_[1]); |
| 170 |
$item = $_[1]; |
| 171 |
# conversions/encodings |
| 172 |
$item = scalar2utf8($item) if ($item && $options->{utf8}); |
| 173 |
} |
| 174 |
#$result->{$_[0]} = $item if $item; # use item only if not undef (TODO: make configurable via $options) |
| 175 |
$result->{$_[0]} = $item; # use item in any case |
| 176 |
} |
| 177 |
|
| 178 |
} |
| 179 |
|
| 180 |
# convert all values to utf8 (inside complex struct) |
| 181 |
# now done in core-item-callbacks via Greg London's "Iterate" from CPAN |
| 182 |
# var2utf8($result) if ($options->{utf8}); |
| 183 |
|
| 184 |
# destroy persistent object from memory to be sure to get a fresh one next time |
| 185 |
#undef $obj if $options->{destroy}; |
| 186 |
#$options->{cb_destroy}->($obj) if $options->{cb_destroy}; |
| 187 |
#$options->{cb}->{destroy}->($obj) if $options->{destroy}; |
| 188 |
|
| 189 |
return $result; |
| 190 |
} |
| 191 |
|
| 192 |
|
| 193 |
|
| 194 |
my @indexstack; |
| 195 |
sub var_traverse_mixin_update { |
| 196 |
my $obj = shift; |
| 197 |
my $data = shift; |
| 198 |
my $bool_recursion = shift; |
| 199 |
if (!$bool_recursion) { |
| 200 |
@indexstack = (); |
| 201 |
} |
| 202 |
my $result; |
| 203 |
|
| 204 |
# 'ARRAY' does not work! |
| 205 |
if ((ref $obj) eq 'ARRAY') { |
| 206 |
#print "ARRAY\n"; |
| 207 |
my $i = 0; |
| 208 |
foreach (@{$obj}) { |
| 209 |
push @indexstack, $i; |
| 210 |
my $ref = ref $_; |
| 211 |
if ($ref) { |
| 212 |
#$obj->[$i] = var_mixin($_, $data, 1); |
| 213 |
var_traverse_mixin_update($_, $data, 1); |
| 214 |
} else { |
| 215 |
$obj->[$i] = $_; |
| 216 |
} |
| 217 |
pop @indexstack; |
| 218 |
$i++; |
| 219 |
} |
| 220 |
} else { |
| 221 |
foreach (keys %{$obj}) { |
| 222 |
push @indexstack, $_; |
| 223 |
my $ref = ref $obj->{$_}; |
| 224 |
if ($ref) { |
| 225 |
#$obj->{$_} = var_mixin($obj->{$_}, $data, 1); |
| 226 |
var_traverse_mixin_update($obj->{$_}, $data, 1); |
| 227 |
} else { |
| 228 |
#$obj->{$_} = $obj->{$_}; |
| 229 |
my $evstring = getSlot($data); |
| 230 |
$obj->{$_} = $evstring; |
| 231 |
|
| 232 |
} |
| 233 |
pop @indexstack; |
| 234 |
} |
| 235 |
} |
| 236 |
#return $result; |
| 237 |
} |
| 238 |
|
| 239 |
sub object2hash { |
| 240 |
my $object = shift; |
| 241 |
my $options = shift; |
| 242 |
#my $deref = var_deref($object); |
| 243 |
my $deref = expand($object, $options); |
| 244 |
#var2utf8($deref) if ($options->{utf8}); |
| 245 |
return $deref; |
| 246 |
} |
| 247 |
|
| 248 |
# todo: maybe do diff(s) here sometimes!? |
| 249 |
sub hash2object { |
| 250 |
my $object = shift; |
| 251 |
my $data = shift; |
| 252 |
my $options = shift; |
| 253 |
|
| 254 |
#print "hash2object", "\n"; |
| 255 |
|
| 256 |
# "patch" needed 'cause php passes numerical-indexed-arrays as hash-tables, |
| 257 |
# this method corrects this |
| 258 |
var_NumericalHashToArray($data) if ($options->{php}); |
| 259 |
|
| 260 |
# utf8-conversion/-encoding (essential for I18N) |
| 261 |
var_utf2iso($data) if ($options->{utf8}); |
| 262 |
|
| 263 |
# get fresh object from database |
| 264 |
# todo: |
| 265 |
# - handle "locked" objects !!! |
| 266 |
# - check if already another update occoured (object-revisioning needed!) |
| 267 |
#my $obj = $self->getObject($oid); |
| 268 |
|
| 269 |
# mix changes into fresh object and save it back |
| 270 |
hash2object_traverse_mixin($object, $data, 0, $options); |
| 271 |
|
| 272 |
# done in core mixin function? |
| 273 |
#$self->{storage}->update($obj); |
| 274 |
|
| 275 |
# we should "undef" some objects here to destroy them in memory and enforce reloading when used next time |
| 276 |
# simulate: |
| 277 |
#$self->{storage}->disconnect(); |
| 278 |
|
| 279 |
} |
| 280 |
|
| 281 |
# ------------------------------------ |
| 282 |
# core mixin function |
| 283 |
# TODO-FEATURE: make this possible in a reverse way: object is empty (no fields) and gets filled up by mixin-data |
| 284 |
|
| 285 |
# remember keys of structures we are traversing |
| 286 |
# this is a HACK: |
| 287 |
# - don't (!!!) "packageglobal" @indexstack |
| 288 |
# - it will lead to problems with parallelism! |
| 289 |
|
| 290 |
#my @indexstack; |
| 291 |
|
| 292 |
# traverse a deeply nested structure, mix in values from given hash, update underlying tangram-object |
| 293 |
sub hash2object_traverse_mixin { |
| 294 |
my $object = shift; |
| 295 |
my $data = shift; |
| 296 |
my $bool_recursion = shift; |
| 297 |
my $options = shift; |
| 298 |
|
| 299 |
# clear our key - stack if we are called from user-code (non-recursively) |
| 300 |
@indexstack = () if (!$bool_recursion); |
| 301 |
|
| 302 |
my $classname = ref $object; |
| 303 |
# if ($classname) { |
| 304 |
# print STDERR "*****************", Dumper(Class::Tangram::attribute_types($classname)), "\n"; |
| 305 |
# } |
| 306 |
|
| 307 |
# parser: detected OBJECT (a Tangram one?) (reftype == HASH) (assume) |
| 308 |
# what's exactly done here? hmmm.... it works ;) |
| 309 |
# maybe a HACK: please try not to use "IntrHash"es, maybe this cannot handle them!!! |
| 310 |
# extend! check! |
| 311 |
if ((attributes::reftype($object) eq 'HASH') && (ref($object) ne 'HASH') && (ref($object) ne 'ARRAY')) { |
| 312 |
|
| 313 |
# print STDERR "===", "reftype: ", attributes::reftype($obj), "\n"; |
| 314 |
|
| 315 |
my @fields; |
| 316 |
# loop through fields of object (Tangram-object) |
| 317 |
@fields = keys %{$object}; |
| 318 |
|
| 319 |
# loop through fields of to.be.injected-data (arbitrary Perl-data-structure) |
| 320 |
@fields = keys %{$data} if $options->{init}; |
| 321 |
# @fields = keys %{$data} if $options->{mixin}; |
| 322 |
|
| 323 |
foreach (@fields) { |
| 324 |
my $field = $_; |
| 325 |
push @indexstack, $field; |
| 326 |
|
| 327 |
# determine type of object |
| 328 |
my $ref = ref $object->{$field}; |
| 329 |
# print STDERR "attrname: $_ ATTRref: $ref", "\n"; |
| 330 |
if ($ref) { |
| 331 |
hash2object_traverse_mixin($object->{$field}, $data, 1, $options); |
| 332 |
} else { |
| 333 |
my $val = getStructSlotByStringyAddress($data, \@indexstack); |
| 334 |
|
| 335 |
#print Dumper($options); |
| 336 |
my $field_target = $field; |
| 337 |
if (my $pattern = $options->{pattern_strip_key}) { |
| 338 |
print "pattern: $pattern", "\n"; |
| 339 |
$field_target =~ s/$pattern//; |
| 340 |
print "field: $field_target", "\n"; |
| 341 |
} |
| 342 |
|
| 343 |
$object->{$field_target} = $val if defined $val; |
| 344 |
} |
| 345 |
pop @indexstack; |
| 346 |
} |
| 347 |
|
| 348 |
# save object to database ... |
| 349 |
# ... do an update if it already exists, do an insert if it doesn't |
| 350 |
# my $objectId = $self->{storage}->id($obj); |
| 351 |
# $logger->debug( __PACKAGE__ . "->saveObjectFromHash_traverse_mixin_update( object $obj objectId $objectId )" ); |
| 352 |
# if ($objectId) { |
| 353 |
# $self->{storage}->update($obj); |
| 354 |
|
| 355 |
#print __PACKAGE__ . ":", "\n"; |
| 356 |
#print Dumper($object); |
| 357 |
|
| 358 |
# } else { |
| 359 |
# $self->{storage}->insert($obj); |
| 360 |
# } |
| 361 |
|
| 362 |
} |
| 363 |
|
| 364 |
#&& ( ref($obj) ne 'HASH' ) |
| 365 |
|
| 366 |
# loop through entries of array (IntrArray, isn't it?) |
| 367 |
if ((ref $object) eq 'ARRAY') { |
| 368 |
# print STDERR "===", "refttype ", attributes::reftype($obj), "\n"; |
| 369 |
my $i = 0; |
| 370 |
foreach (@{$object}) { |
| 371 |
push @indexstack, $i; |
| 372 |
my $ref = ref $_; |
| 373 |
# print STDERR "attrname: $_ ATTRref: $ref", "\n"; |
| 374 |
# if ($ref && $_) { |
| 375 |
if ($ref) { |
| 376 |
hash2object_traverse_mixin($_, $data, 1, $options); |
| 377 |
} else { |
| 378 |
$object->[$i] = $_ if defined $_; |
| 379 |
} |
| 380 |
pop @indexstack; |
| 381 |
$i++; |
| 382 |
} |
| 383 |
} |
| 384 |
|
| 385 |
} |
| 386 |
|
| 387 |
|
| 388 |
# this function seems to do similar stuff like these below (refexpr2perlref & co.) |
| 389 |
# TODO: maybe this mechanism can be replaced completely through some nice module from CPAN .... ? ;-) |
| 390 |
sub getStructSlotByStringyAddress { |
| 391 |
my $var = shift; |
| 392 |
my $indexstack_ref = shift; |
| 393 |
my @indexstack = @{$indexstack_ref}; |
| 394 |
my $joiner = '->'; |
| 395 |
my @evlist; |
| 396 |
foreach (@indexstack) { |
| 397 |
my $elem; |
| 398 |
if ($_ =~ m/\d+/) { $elem = "[$_]"; } |
| 399 |
if ($_ =~ m/\D+/) { $elem = "{$_}"; } |
| 400 |
push @evlist, $elem; |
| 401 |
} |
| 402 |
my $evstring = join($joiner, @evlist); |
| 403 |
$evstring = 'return $var->' . $evstring . ';'; |
| 404 |
#print "ev: $evstring\n"; |
| 405 |
return eval($evstring); |
| 406 |
} |
| 407 |
|
| 408 |
|
| 409 |
sub refexpr2perlref { |
| 410 |
|
| 411 |
my $obj = shift; |
| 412 |
my $expr = shift; |
| 413 |
my $callbackMap = shift; |
| 414 |
|
| 415 |
my $value; |
| 416 |
# detect for callback (code-reference) |
| 417 |
if (ref($expr) eq 'CODE') { |
| 418 |
$value = &$expr($obj); |
| 419 |
|
| 420 |
} elsif ($expr =~ m/->/) { |
| 421 |
# use expr as complex object reference declaration (obj->subObj->subSubObj->0->attribute) |
| 422 |
(my $objPerlRefString, my $parts) = refexpr2perlref_parts($expr); |
| 423 |
#print "\n", "expr: $expr"; |
| 424 |
#print "\n", "objPerlRefString: $objPerlRefString"; |
| 425 |
$value = eval('$obj' . '->' . $objPerlRefString); |
| 426 |
|
| 427 |
# if value isn't set, try to "fallback" to callbackMap |
| 428 |
# callbacks are applied this way: |
| 429 |
# take the last element of the expression parts and check if this string exists as a key in the callback-map |
| 430 |
if (!$value && $callbackMap) { |
| 431 |
#print Dumper($callbackMap); |
| 432 |
|
| 433 |
# prepare needle |
| 434 |
my @parts = @$parts; |
| 435 |
my $count = $#parts; |
| 436 |
my $needle = $parts[$count]; |
| 437 |
|
| 438 |
# prepare haystack |
| 439 |
my @haystack = keys %$callbackMap; |
| 440 |
if (grep($needle, @haystack)) { |
| 441 |
$value = $callbackMap->{$needle}->(); |
| 442 |
#print "value: ", $value, "\n"; |
| 443 |
} |
| 444 |
} |
| 445 |
|
| 446 |
} else { |
| 447 |
# use expr as simple scalar key (attributename) |
| 448 |
$value = $obj->{$expr}; |
| 449 |
} |
| 450 |
|
| 451 |
return $value; |
| 452 |
|
| 453 |
} |
| 454 |
|
| 455 |
|
| 456 |
sub refexpr2perlref_parts { |
| 457 |
my $expr = shift; |
| 458 |
|
| 459 |
# split expression by dereference operators first |
| 460 |
my @parts_pure = split(/->/, $expr); |
| 461 |
|
| 462 |
# wrap []'s around each part, if it consists of numeric characters only (=> numeric = array-index), |
| 463 |
# use {}'s, if there are word-characters in it (=> alphanumeric = hash-key) |
| 464 |
my @parts_capsule = @parts_pure; |
| 465 |
map { |
| 466 |
m/^\d+$/ && ($_ = "[$_]") || ($_ = "{$_}"); |
| 467 |
} @parts_capsule; |
| 468 |
|
| 469 |
# join parts with dereference operators together again and return built string |
| 470 |
return (join('->', @parts_capsule), \@parts_pure); |
| 471 |
} |
| 472 |
|
| 473 |
# ACK's go to ... |
| 474 |
sub deep_copy { |
| 475 |
my $this = shift; |
| 476 |
if (not ref $this) { |
| 477 |
$this; |
| 478 |
} elsif (ref $this eq "ARRAY") { |
| 479 |
[map deep_copy($_), @$this]; |
| 480 |
} elsif (ref $this eq "HASH") { |
| 481 |
+{map { $_ => deep_copy($this->{$_}) } keys %$this}; |
| 482 |
} elsif (ref $this eq "CODE") { |
| 483 |
$this; |
| 484 |
#} else { die "deep_copy asks: what type is $this?" } |
| 485 |
} else { print "deep_copy asks: what type is $this?", "\n"; } |
| 486 |
} |
| 487 |
|
| 488 |
1; |
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