| 1 |
############################################## |
| 2 |
# |
| 3 |
# $Id: Deep.pm,v 1.3 2002/12/03 05:34:55 joko Exp $ |
| 4 |
# |
| 5 |
# $Log: Deep.pm,v $ |
| 6 |
# Revision 1.3 2002/12/03 05:34:55 joko |
| 7 |
# + bugfix: now utilizing var_utf2iso from Data::Transform::Encode |
| 8 |
# |
| 9 |
# Revision 1.2 2002/12/01 04:44:07 joko |
| 10 |
# + code from Data::Transform::OO |
| 11 |
# |
| 12 |
# Revision 1.1 2002/11/29 04:49:20 joko |
| 13 |
# + initial check-in |
| 14 |
# |
| 15 |
# Revision 1.1 2002/10/10 03:26:00 cvsjoko |
| 16 |
# + new |
| 17 |
# |
| 18 |
############################################## |
| 19 |
|
| 20 |
|
| 21 |
package Data::Transform::Deep; |
| 22 |
|
| 23 |
use strict; |
| 24 |
use warnings; |
| 25 |
|
| 26 |
require Exporter; |
| 27 |
our @ISA = qw( Exporter ); |
| 28 |
our @EXPORT_OK = qw( |
| 29 |
&var_NumericalHashToArray |
| 30 |
&var_mixin |
| 31 |
&object2hash |
| 32 |
&hash2object |
| 33 |
&refexpr2perlref |
| 34 |
&expand |
| 35 |
); |
| 36 |
# &var_deref |
| 37 |
# &getStructSlotByStringyAddress |
| 38 |
|
| 39 |
use attributes; |
| 40 |
use Data::Dumper; |
| 41 |
use Data::Transform::Encode qw( var_utf2iso var2utf8 scalar2utf8 ); |
| 42 |
use libp qw( deep_copy ); |
| 43 |
use Iterate; |
| 44 |
|
| 45 |
sub var_NumericalHashToArray { |
| 46 |
my $vref = shift; |
| 47 |
#my $context = shift; |
| 48 |
if (ref $vref eq 'HASH') { |
| 49 |
foreach (keys %{$vref}) { |
| 50 |
# if ((ref $vref->{$_}) =~ m/HASH/) { |
| 51 |
if ((ref $vref->{$_}) =~ m/HASH/) { |
| 52 |
if ($vref->{$_}{0}) { # might be a numerical-indexed array |
| 53 |
#print "000\n"; |
| 54 |
#print "context: $context\n"; |
| 55 |
my @arr; |
| 56 |
foreach my $key_numeric (sort keys %{$vref->{$_}}) { |
| 57 |
push @arr, $vref->{$_}{$key_numeric}; |
| 58 |
} |
| 59 |
$vref->{$_} = \@arr; |
| 60 |
} |
| 61 |
var_NumericalHashToArray($vref->{$_}); |
| 62 |
} |
| 63 |
# } else { |
| 64 |
# #$vref->{$_} = scalar2iso($vref->{$_}); |
| 65 |
# } |
| 66 |
} |
| 67 |
} |
| 68 |
} |
| 69 |
|
| 70 |
|
| 71 |
sub var_deref { |
| 72 |
my $obj = shift; |
| 73 |
my $options = shift; |
| 74 |
my $result; |
| 75 |
if ((ref $obj) eq 'ARRAY') { |
| 76 |
foreach (@{$obj}) { |
| 77 |
my $ref = ref $_; |
| 78 |
if ($ref) { |
| 79 |
push(@{$result}, var_deref($_, $options)); |
| 80 |
#undef $_; |
| 81 |
} else { |
| 82 |
#push(@{$result}, $_); |
| 83 |
push(@{$result}, deep_copy($_)); |
| 84 |
} |
| 85 |
#undef $_ if $options->{destroy}; |
| 86 |
#$options->{destroy}->($_) if $options->{destroy}; |
| 87 |
} |
| 88 |
# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ??? |
| 89 |
} else { |
| 90 |
foreach (keys %{$obj}) { |
| 91 |
my $key = $_; |
| 92 |
my $ref = ref $obj->{$_}; |
| 93 |
if ($ref) { |
| 94 |
$result->{$_} = var_deref($obj->{$_}, $options); |
| 95 |
#undef $obj->{$_}; |
| 96 |
} else { |
| 97 |
#$result->{$_} = $obj->{$_}; |
| 98 |
$result->{$_} = deep_copy($obj->{$_}); |
| 99 |
} |
| 100 |
#undef $obj->{$_} if $options->{destroy}; |
| 101 |
#$options->{destroy}->($obj->{$_}) if $options->{destroy}; |
| 102 |
} |
| 103 |
} |
| 104 |
#undef $obj if $options->{destroy}; |
| 105 |
$options->{cb_destroy}->($obj) if $options->{cb_destroy}; |
| 106 |
return $result; |
| 107 |
} |
| 108 |
|
| 109 |
|
| 110 |
sub expand { |
| 111 |
|
| 112 |
my $obj = shift; |
| 113 |
my $options = shift; |
| 114 |
my $result; |
| 115 |
|
| 116 |
if ((ref $obj) eq 'ARRAY') { |
| 117 |
|
| 118 |
IterArray @$obj, sub { |
| 119 |
my $item; |
| 120 |
# if current item is a reference ... |
| 121 |
if (ref $_[0]) { |
| 122 |
# ... expand structure recursively |
| 123 |
$item = expand($_[0], $options); |
| 124 |
# destroy item via seperate callback method (a POST) if requested |
| 125 |
#$options->{cb}->{destroy}->($_[0]) if $options->{destroy}; |
| 126 |
|
| 127 |
# ... assume plain scalar |
| 128 |
} else { |
| 129 |
#$item = deep_copy($_[0]); |
| 130 |
$item = $_[0]; |
| 131 |
# conversions/encodings |
| 132 |
$item = scalar2utf8($item) if ($item && $options->{utf8}); |
| 133 |
} |
| 134 |
#push(@{$result}, $item) if $item; # use item only if not undef (TODO: make configurable via $options) |
| 135 |
push(@{$result}, $item); # use item in any case |
| 136 |
|
| 137 |
} |
| 138 |
|
| 139 |
# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ??? |
| 140 |
} else { |
| 141 |
|
| 142 |
IterHash %$obj, sub { |
| 143 |
my $item; |
| 144 |
|
| 145 |
# if current item is a reference ... |
| 146 |
if (ref $_[1]) { |
| 147 |
# ... expand structure recursively |
| 148 |
$item = expand($_[1], $options); |
| 149 |
# destroy item via seperate callback method (a POST) if requested |
| 150 |
#$options->{cb}->{destroy}->($_[1]) if $options->{destroy}; |
| 151 |
|
| 152 |
# ... assume plain scalar |
| 153 |
} else { |
| 154 |
#$item = deep_copy($_[1]); |
| 155 |
$item = $_[1]; |
| 156 |
# conversions/encodings |
| 157 |
$item = scalar2utf8($item) if ($item && $options->{utf8}); |
| 158 |
} |
| 159 |
#$result->{$_[0]} = $item if $item; # use item only if not undef (TODO: make configurable via $options) |
| 160 |
$result->{$_[0]} = $item; # use item in any case |
| 161 |
} |
| 162 |
|
| 163 |
} |
| 164 |
|
| 165 |
# convert all values to utf8 (inside complex struct) |
| 166 |
# now done in core-item-callbacks via Greg London's "Iterate" from CPAN |
| 167 |
# var2utf8($result) if ($options->{utf8}); |
| 168 |
|
| 169 |
# destroy persistent object from memory to be sure to get a fresh one next time |
| 170 |
#undef $obj if $options->{destroy}; |
| 171 |
#$options->{cb_destroy}->($obj) if $options->{cb_destroy}; |
| 172 |
#$options->{cb}->{destroy}->($obj) if $options->{destroy}; |
| 173 |
|
| 174 |
return $result; |
| 175 |
} |
| 176 |
|
| 177 |
|
| 178 |
|
| 179 |
my @indexstack; |
| 180 |
sub var_traverse_mixin_update { |
| 181 |
my $obj = shift; |
| 182 |
my $data = shift; |
| 183 |
my $bool_recursion = shift; |
| 184 |
if (!$bool_recursion) { |
| 185 |
@indexstack = (); |
| 186 |
} |
| 187 |
my $result; |
| 188 |
|
| 189 |
# 'ARRAY' does not work! |
| 190 |
if ((ref $obj) eq 'ARRAY') { |
| 191 |
#print "ARRAY\n"; |
| 192 |
my $i = 0; |
| 193 |
foreach (@{$obj}) { |
| 194 |
push @indexstack, $i; |
| 195 |
my $ref = ref $_; |
| 196 |
if ($ref) { |
| 197 |
#$obj->[$i] = var_mixin($_, $data, 1); |
| 198 |
var_traverse_mixin_update($_, $data, 1); |
| 199 |
} else { |
| 200 |
$obj->[$i] = $_; |
| 201 |
} |
| 202 |
pop @indexstack; |
| 203 |
$i++; |
| 204 |
} |
| 205 |
} else { |
| 206 |
foreach (keys %{$obj}) { |
| 207 |
push @indexstack, $_; |
| 208 |
my $ref = ref $obj->{$_}; |
| 209 |
if ($ref) { |
| 210 |
#$obj->{$_} = var_mixin($obj->{$_}, $data, 1); |
| 211 |
var_traverse_mixin_update($obj->{$_}, $data, 1); |
| 212 |
} else { |
| 213 |
#$obj->{$_} = $obj->{$_}; |
| 214 |
my $evstring = getSlot($data); |
| 215 |
$obj->{$_} = $evstring; |
| 216 |
|
| 217 |
} |
| 218 |
pop @indexstack; |
| 219 |
} |
| 220 |
} |
| 221 |
#return $result; |
| 222 |
} |
| 223 |
|
| 224 |
sub object2hash { |
| 225 |
my $object = shift; |
| 226 |
my $options = shift; |
| 227 |
#my $deref = var_deref($object); |
| 228 |
my $deref = expand($object, $options); |
| 229 |
#var2utf8($deref) if ($options->{utf8}); |
| 230 |
return $deref; |
| 231 |
} |
| 232 |
|
| 233 |
# todo: maybe do diff(s) here sometimes!? |
| 234 |
sub hash2object { |
| 235 |
my $object = shift; |
| 236 |
my $data = shift; |
| 237 |
my $options = shift; |
| 238 |
|
| 239 |
#print "hash2object", "\n"; |
| 240 |
|
| 241 |
# "patch" needed 'cause php passes numerical-indexed-arrays as hash-tables, |
| 242 |
# this method corrects this |
| 243 |
var_NumericalHashToArray($data) if ($options->{php}); |
| 244 |
|
| 245 |
# utf8-conversion/-encoding (essential for I18N) |
| 246 |
var_utf2iso($data) if ($options->{utf8}); |
| 247 |
|
| 248 |
# get fresh object from database |
| 249 |
# todo: |
| 250 |
# - handle "locked" objects !!! |
| 251 |
# - check if already another update occoured (object-revisioning needed!) |
| 252 |
#my $obj = $self->getObject($oid); |
| 253 |
|
| 254 |
# mix changes into fresh object and save it back |
| 255 |
hash2object_traverse_mixin($object, $data); |
| 256 |
|
| 257 |
# done in core mixin function? |
| 258 |
#$self->{storage}->update($obj); |
| 259 |
|
| 260 |
# we should "undef" some objects here to destroy them in memory and enforce reloading when used next time |
| 261 |
# simulate: |
| 262 |
#$self->{storage}->disconnect(); |
| 263 |
|
| 264 |
} |
| 265 |
|
| 266 |
# ------------------------------------ |
| 267 |
# core mixin function |
| 268 |
# TODO-FEATURE: make this possible in a reverse way: object is empty (no fields) and gets filled up by mixin-data |
| 269 |
|
| 270 |
# remember keys of structures we are traversing |
| 271 |
# this is a HACK: |
| 272 |
# - don't (!!!) "packageglobal" @indexstack |
| 273 |
# - it will lead to problems with parallelism! |
| 274 |
|
| 275 |
#my @indexstack; |
| 276 |
|
| 277 |
# traverse a deeply nested structure, mix in values from given hash, update underlying tangram-object |
| 278 |
sub hash2object_traverse_mixin { |
| 279 |
my $object = shift; |
| 280 |
my $data = shift; |
| 281 |
my $bool_recursion = shift; |
| 282 |
|
| 283 |
# clear our key - stack if we are called from user-code (non-recursively) |
| 284 |
@indexstack = () if (!$bool_recursion); |
| 285 |
|
| 286 |
my $classname = ref $object; |
| 287 |
# if ($classname) { |
| 288 |
# print STDERR "*****************", Dumper(Class::Tangram::attribute_types($classname)), "\n"; |
| 289 |
# } |
| 290 |
|
| 291 |
# parser: detected OBJECT (a Tangram one?) (reftype == HASH) (assume) |
| 292 |
# what's exactly done here? hmmm.... it works ;) |
| 293 |
# maybe a HACK: please try not to use "IntrHash"es, maybe this cannot handle them!!! |
| 294 |
# extend! check! |
| 295 |
if ((attributes::reftype($object) eq 'HASH') && (ref($object) ne 'HASH') && (ref($object) ne 'ARRAY')) { |
| 296 |
|
| 297 |
# print STDERR "===", "reftype: ", attributes::reftype($obj), "\n"; |
| 298 |
|
| 299 |
# loop through fields of object (Tangram-object) |
| 300 |
foreach (keys %{$object}) { |
| 301 |
push @indexstack, $_; |
| 302 |
|
| 303 |
# determine type of object |
| 304 |
my $ref = ref $object->{$_}; |
| 305 |
# print STDERR "attrname: $_ ATTRref: $ref", "\n"; |
| 306 |
if ($ref) { |
| 307 |
hash2object_traverse_mixin($object->{$_}, $data, 1); |
| 308 |
} else { |
| 309 |
my $val = getStructSlotByStringyAddress($data, \@indexstack); |
| 310 |
$object->{$_} = $val; |
| 311 |
} |
| 312 |
pop @indexstack; |
| 313 |
} |
| 314 |
|
| 315 |
# save object to database ... |
| 316 |
# ... do an update if it already exists, do an insert if it doesn't |
| 317 |
# my $objectId = $self->{storage}->id($obj); |
| 318 |
# $logger->debug( __PACKAGE__ . "->saveObjectFromHash_traverse_mixin_update( object $obj objectId $objectId )" ); |
| 319 |
# if ($objectId) { |
| 320 |
# $self->{storage}->update($obj); |
| 321 |
|
| 322 |
#print __PACKAGE__ . ":", "\n"; |
| 323 |
#print Dumper($object); |
| 324 |
|
| 325 |
# } else { |
| 326 |
# $self->{storage}->insert($obj); |
| 327 |
# } |
| 328 |
|
| 329 |
} |
| 330 |
|
| 331 |
#&& ( ref($obj) ne 'HASH' ) |
| 332 |
|
| 333 |
# loop through entries of array (IntrArray, isn't it?) |
| 334 |
if ((ref $object) eq 'ARRAY') { |
| 335 |
# print STDERR "===", "refttype ", attributes::reftype($obj), "\n"; |
| 336 |
my $i = 0; |
| 337 |
foreach (@{$object}) { |
| 338 |
push @indexstack, $i; |
| 339 |
my $ref = ref $_; |
| 340 |
# print STDERR "attrname: $_ ATTRref: $ref", "\n"; |
| 341 |
if ($ref && $_) { |
| 342 |
hash2object_traverse_mixin($_, $data, 1); |
| 343 |
} else { |
| 344 |
$object->[$i] = $_; |
| 345 |
} |
| 346 |
pop @indexstack; |
| 347 |
$i++; |
| 348 |
} |
| 349 |
} |
| 350 |
|
| 351 |
} |
| 352 |
|
| 353 |
|
| 354 |
# this function seems to do similar stuff like these below (refexpr2perlref & co.) |
| 355 |
sub getStructSlotByStringyAddress { |
| 356 |
my $var = shift; |
| 357 |
my $indexstack_ref = shift; |
| 358 |
my @indexstack = @{$indexstack_ref}; |
| 359 |
my $joiner = '->'; |
| 360 |
my @evlist; |
| 361 |
foreach (@indexstack) { |
| 362 |
my $elem; |
| 363 |
if ($_ =~ m/\d+/) { $elem = "[$_]"; } |
| 364 |
if ($_ =~ m/\D+/) { $elem = "{$_}"; } |
| 365 |
push @evlist, $elem; |
| 366 |
} |
| 367 |
my $evstring = join($joiner, @evlist); |
| 368 |
$evstring = 'return $var->' . $evstring . ';'; |
| 369 |
#print "ev: $evstring\n"; |
| 370 |
return eval($evstring); |
| 371 |
} |
| 372 |
|
| 373 |
|
| 374 |
sub refexpr2perlref { |
| 375 |
|
| 376 |
my $obj = shift; |
| 377 |
my $expr = shift; |
| 378 |
my $callbackMap = shift; |
| 379 |
|
| 380 |
my $value; |
| 381 |
# detect for callback (code-reference) |
| 382 |
if (ref($expr) eq 'CODE') { |
| 383 |
$value = &$expr($obj); |
| 384 |
|
| 385 |
} elsif ($expr =~ m/->/) { |
| 386 |
# use expr as complex object reference declaration (obj->subObj->subSubObj->0->attribute) |
| 387 |
(my $objPerlRefString, my $parts) = refexpr2perlref_parts($expr); |
| 388 |
#print "\n", "expr: $expr"; |
| 389 |
#print "\n", "objPerlRefString: $objPerlRefString"; |
| 390 |
$value = eval('$obj' . '->' . $objPerlRefString); |
| 391 |
|
| 392 |
# if value isn't set, try to "fallback" to callbackMap |
| 393 |
# callbacks are applied this way: |
| 394 |
# take the last element of the expression parts and check if this string exists as a key in the callback-map |
| 395 |
if (!$value && $callbackMap) { |
| 396 |
#print Dumper($callbackMap); |
| 397 |
|
| 398 |
# prepare needle |
| 399 |
my @parts = @$parts; |
| 400 |
my $count = $#parts; |
| 401 |
my $needle = $parts[$count]; |
| 402 |
|
| 403 |
# prepare haystack |
| 404 |
my @haystack = keys %$callbackMap; |
| 405 |
if (grep($needle, @haystack)) { |
| 406 |
$value = $callbackMap->{$needle}->(); |
| 407 |
#print "value: ", $value, "\n"; |
| 408 |
} |
| 409 |
} |
| 410 |
|
| 411 |
} else { |
| 412 |
# use expr as simple scalar key (attributename) |
| 413 |
$value = $obj->{$expr}; |
| 414 |
} |
| 415 |
|
| 416 |
return $value; |
| 417 |
|
| 418 |
} |
| 419 |
|
| 420 |
|
| 421 |
sub refexpr2perlref_parts { |
| 422 |
my $expr = shift; |
| 423 |
|
| 424 |
# split expression by dereference operators first |
| 425 |
my @parts_pure = split(/->/, $expr); |
| 426 |
|
| 427 |
# wrap []'s around each part, if it consists of numeric characters only (=> numeric = array-index), |
| 428 |
# use {}'s, if there are word-characters in it (=> alphanumeric = hash-key) |
| 429 |
my @parts_capsule = @parts_pure; |
| 430 |
map { |
| 431 |
m/^\d+$/ && ($_ = "[$_]") || ($_ = "{$_}"); |
| 432 |
} @parts_capsule; |
| 433 |
|
| 434 |
# join parts with dereference operators together again and return built string |
| 435 |
return (join('->', @parts_capsule), \@parts_pure); |
| 436 |
} |
| 437 |
|
| 438 |
1; |
Parent Directory
| 
Revision Log
