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## --------------------------------------------------------------------------- |
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## $Id: Deep.pm,v 1.19 2003/03/28 03:11:25 jonen Exp $ |
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## --------------------------------------------------------------------------- |
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## $Log: Deep.pm,v $ |
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## Revision 1.19 2003/03/28 03:11:25 jonen |
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## + bugfix |
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## |
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## Revision 1.18 2003/03/28 03:07:26 jonen |
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## + minor changes |
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## |
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## Revision 1.17 2003/03/27 15:17:07 joko |
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## namespace fixes for Data::Mungle::* |
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## |
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## Revision 1.16 2003/03/27 15:04:52 joko |
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## minor update: comment |
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## |
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## Revision 1.15 2003/02/27 14:39:48 jonen |
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## + fixed bug at _hash2object() |
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## |
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## Revision 1.14 2003/02/22 17:13:55 jonen |
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## + added function 'childObject2string()' to encode 'child'-references to option related string |
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## + use new option at 'expand()' for replacing 'childObject2string' |
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## |
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## Revision 1.13 2003/02/21 01:48:50 joko |
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## renamed core function |
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## |
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## Revision 1.12 2003/02/20 22:45:19 joko |
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## fix regarding new deep_copy |
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## |
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## Revision 1.11 2003/02/20 21:13:54 joko |
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## - removed implementation of deep_copy2 - get this from the Pitonyak namespace (now cloned to repository) |
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## |
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## Revision 1.10 2003/02/20 20:48:00 joko |
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## - refactored lots of code to Data::Code::Ref |
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## + alternative 'deep_copy' implementation |
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## |
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## Revision 1.9 2003/02/18 19:35:56 joko |
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## +- modified 'sub refexpr2perlref': now can get the $delimiter passed, too |
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## |
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## Revision 1.8 2003/02/09 05:10:56 joko |
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## + minor update |
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## |
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## Revision 1.7 2003/01/19 03:26:59 joko |
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## + added 'sub deep_copy' - refactored from libp |
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## + add 'sub merge' - exported from CPAN's 'Hash::Merge' |
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## |
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## Revision 1.6 2002/12/23 11:27:53 jonen |
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## + changed behavior WATCH! |
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## |
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## Revision 1.5 2002/12/16 19:57:54 joko |
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## + option 'init' |
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## |
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## Revision 1.4 2002/12/05 13:56:49 joko |
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## - var_deref |
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## + expand - more sophisticated dereferencing with callbacks using Iterate |
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## |
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## 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 |
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## + initial check-in |
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## |
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## Revision 1.1 2002/10/10 03:26:00 cvsjoko |
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## + new |
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## --------------------------------------------------------------------------- |
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|
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|
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package Data::Mungle::Transform::Deep; |
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|
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use strict; |
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use warnings; |
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|
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require Exporter; |
77 |
our @ISA = qw( Exporter ); |
78 |
our @EXPORT_OK = qw( |
79 |
&expand |
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&deep_copy |
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&merge_to |
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); |
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|
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|
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use attributes; |
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use Data::Dumper; |
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use Iterate; |
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|
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use Pitonyak::DeepCopy; |
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use Data::Mungle::Transform::Encode qw( latin_to_utf8 latin_to_utf8_scalar utf8_to_latin utf8_to_latin_scalar ); |
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use Data::Mungle::Code::Ref qw( ref_slot ); |
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|
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sub numhash2list { |
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my $vref = shift; |
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#my $context = shift; |
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if (ref $vref eq 'HASH') { |
97 |
foreach (keys %{$vref}) { |
98 |
# if ((ref $vref->{$_}) =~ m/HASH/) { |
99 |
if ((ref $vref->{$_}) =~ m/HASH/) { |
100 |
if ($vref->{$_}{0}) { # might be a numerical-indexed array |
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#print "000\n"; |
102 |
#print "context: $context\n"; |
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my @arr; |
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foreach my $key_numeric (sort keys %{$vref->{$_}}) { |
105 |
push @arr, $vref->{$_}{$key_numeric}; |
106 |
} |
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$vref->{$_} = \@arr; |
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} |
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numhash2list($vref->{$_}); |
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} |
111 |
# } else { |
112 |
# #$vref->{$_} = scalar2iso($vref->{$_}); |
113 |
# } |
114 |
} |
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} |
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} |
117 |
|
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|
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# FIXME: could this be refactored using expand? |
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# btw: "expand": look at scripts@CPAN (System Administration): |
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# there is a perl make with perl |
122 |
sub _var_deref_test { |
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my $obj = shift; |
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my $options = shift; |
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my $result; |
126 |
if ((ref $obj) eq 'ARRAY') { |
127 |
foreach (@{$obj}) { |
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my $ref = ref $_; |
129 |
if ($ref) { |
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push(@{$result}, var_deref($_, $options)); |
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#undef $_; |
132 |
} else { |
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#push(@{$result}, $_); |
134 |
push(@{$result}, deep_copy($_)); |
135 |
} |
136 |
#undef $_ if $options->{destroy}; |
137 |
#$options->{destroy}->($_) if $options->{destroy}; |
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} |
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# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ??? |
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} else { |
141 |
foreach (keys %{$obj}) { |
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my $key = $_; |
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my $ref = ref $obj->{$_}; |
144 |
if ($ref) { |
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$result->{$_} = var_deref($obj->{$_}, $options); |
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#undef $obj->{$_}; |
147 |
} else { |
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#$result->{$_} = $obj->{$_}; |
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$result->{$_} = deep_copy($obj->{$_}); |
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} |
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#undef $obj->{$_} if $options->{destroy}; |
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#$options->{destroy}->($obj->{$_}) if $options->{destroy}; |
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} |
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} |
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#undef $obj if $options->{destroy}; |
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$options->{cb_destroy}->($obj) if $options->{cb_destroy}; |
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return $result; |
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} |
159 |
|
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|
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# convert values in hash to utf8 (and back) to be ready for (e.g.) encapsulation in XML |
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# but still using the known latin locale stuff |
163 |
sub expand { |
164 |
|
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my $obj = shift; |
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my $options = shift; |
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my $result; |
168 |
|
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#print "ref: ", ref $obj, "\n"; |
170 |
|
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if (ref $obj eq 'ARRAY') { |
172 |
|
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IterArray @$obj, sub { |
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my $item; |
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# if current item is a reference ... |
176 |
if (ref $_[0]) { |
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$item = $_[0]; |
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# if $options->{childObj2string} is TRUE or STRING don't expand referenced object, |
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# instead replace it by per option choosed string (default: o_<classname>_<ref type>_<guid> ) |
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if ($item && $options->{childObj2string}) { |
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$item = childObj2string($item, $options->{childObj2string}); |
182 |
} else { |
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# ... expand structure recursively |
184 |
$item = expand($_[0], $options); |
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} |
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# destroy item via seperate callback method (a POST) if requested |
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#$options->{cb}->{destroy}->($_[0]) if $options->{destroy}; |
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|
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# ... assume plain scalar |
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} else { |
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#$item = deep_copy($_[0]); |
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$item = $_[0]; |
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# conversions/encodings |
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$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8}); |
195 |
$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin}); |
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} |
197 |
#push(@{$result}, $item) if $item; # use item only if not undef (TODO: make configurable via $options) |
198 |
push(@{$result}, $item); # use item in any case |
199 |
|
200 |
} |
201 |
|
202 |
} elsif (ref $obj eq 'CODE') { |
203 |
#print Dumper($obj); |
204 |
#exit; |
205 |
|
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# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ??? |
207 |
} elsif (ref $obj) { |
208 |
|
209 |
IterHash %$obj, sub { |
210 |
my $item; |
211 |
|
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# if current item is a reference ... |
213 |
if (ref $_[1]) { |
214 |
$item = $_[1]; |
215 |
# if $options->{childObj2string} is TRUE or STRING don't expand referenced object, |
216 |
# instead replace it by per option choosed string (default: o_<classname>_<ref type>_<guid> ) |
217 |
if ($item && $options->{childObj2string} && !(ref $_[1] eq "ARRAY") && !(ref $_[1] eq "HASH")) { |
218 |
$item = childObj2string($item, $options->{childObj2string}); |
219 |
} else { |
220 |
# ... expand structure recursively |
221 |
$item = expand($_[1], $options); |
222 |
} |
223 |
# destroy item via seperate callback method (a POST) if requested |
224 |
#$options->{cb}->{destroy}->($_[1]) if $options->{destroy}; |
225 |
|
226 |
# ... assume plain scalar |
227 |
} else { |
228 |
#$item = deep_copy($_[1]); |
229 |
$item = $_[1]; |
230 |
# conversions/encodings |
231 |
$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8}); |
232 |
$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin}); |
233 |
} |
234 |
#$result->{$_[0]} = $item if $item; # use item only if not undef (TODO: make configurable via $options) |
235 |
$result->{$_[0]} = $item; # use item in any case |
236 |
} |
237 |
|
238 |
} else { |
239 |
#die ("not a reference!"); |
240 |
$result = $obj; |
241 |
|
242 |
} |
243 |
|
244 |
# convert all values to utf8 (inside complex struct) |
245 |
# now done in core-item-callbacks via Greg London's "Iterate" from CPAN |
246 |
# latin_to_utf8($result) if ($options->{utf8}); |
247 |
|
248 |
# destroy persistent object from memory to be sure to get a fresh one next time |
249 |
#undef $obj if $options->{destroy}; |
250 |
#$options->{cb_destroy}->($obj) if $options->{cb_destroy}; |
251 |
#$options->{cb}->{destroy}->($obj) if $options->{destroy}; |
252 |
|
253 |
return $result; |
254 |
} |
255 |
|
256 |
|
257 |
|
258 |
my @indexstack; |
259 |
sub _var_traverse_mixin_update_old { |
260 |
my $obj = shift; |
261 |
my $data = shift; |
262 |
my $bool_recursion = shift; |
263 |
if (!$bool_recursion) { |
264 |
@indexstack = (); |
265 |
} |
266 |
my $result; |
267 |
|
268 |
# 'ARRAY' does not work! |
269 |
if ((ref $obj) eq 'ARRAY') { |
270 |
#print "ARRAY\n"; |
271 |
my $i = 0; |
272 |
foreach (@{$obj}) { |
273 |
push @indexstack, $i; |
274 |
my $ref = ref $_; |
275 |
if ($ref) { |
276 |
#$obj->[$i] = var_mixin($_, $data, 1); |
277 |
var_traverse_mixin_update($_, $data, 1); |
278 |
} else { |
279 |
$obj->[$i] = $_; |
280 |
} |
281 |
pop @indexstack; |
282 |
$i++; |
283 |
} |
284 |
} else { |
285 |
foreach (keys %{$obj}) { |
286 |
push @indexstack, $_; |
287 |
my $ref = ref $obj->{$_}; |
288 |
if ($ref) { |
289 |
#$obj->{$_} = var_mixin($obj->{$_}, $data, 1); |
290 |
var_traverse_mixin_update($obj->{$_}, $data, 1); |
291 |
} else { |
292 |
#$obj->{$_} = $obj->{$_}; |
293 |
my $evstring = getSlot($data); |
294 |
$obj->{$_} = $evstring; |
295 |
|
296 |
} |
297 |
pop @indexstack; |
298 |
} |
299 |
} |
300 |
#return $result; |
301 |
} |
302 |
|
303 |
sub merge_to { |
304 |
_hash2object(@_); |
305 |
# TODO: |
306 |
# re-implement using CPAN's "Iterate" and/or a modified Hash::Merge. |
307 |
} |
308 |
|
309 |
|
310 |
# todo: maybe do diff(s) here sometimes!? |
311 |
sub _hash2object { |
312 |
my $object = shift; |
313 |
my $data = shift; |
314 |
my $options = shift; |
315 |
|
316 |
#print "hash2object", "\n"; |
317 |
|
318 |
# "patch" needed 'cause php passes numerical-indexed-arrays as hash-tables, |
319 |
# this method corrects this |
320 |
numhash2list($data) if ($options->{php}); |
321 |
|
322 |
# utf8-conversion/-encoding (essential for I18N) |
323 |
utf8_to_latin($data) if ($options->{utf8}); |
324 |
|
325 |
# get fresh object from database |
326 |
# todo: |
327 |
# - handle "locked" objects !!! |
328 |
# - check if already another update occoured (object-revisioning needed!) |
329 |
#my $obj = $self->getObject($oid); |
330 |
|
331 |
# mix changes into fresh object and save it back |
332 |
_hash2object_traverse_mixin($object, $data, 0, $options); |
333 |
|
334 |
# done in core mixin function? |
335 |
#$self->{storage}->update($obj); |
336 |
|
337 |
# we should "undef" some objects here to destroy them in memory and enforce reloading when used next time |
338 |
# simulate: |
339 |
#$self->{storage}->disconnect(); |
340 |
|
341 |
} |
342 |
|
343 |
# ------------------------------------ |
344 |
# core mixin function |
345 |
# TODO-FEATURE: make this possible in a reverse way: object is empty (no fields) and gets filled up by mixin-data |
346 |
|
347 |
# remember keys of structures we are traversing |
348 |
# this is a HACK: |
349 |
# - don't (!!!) "packageglobal" @indexstack |
350 |
# - it will lead to problems with parallelism! |
351 |
|
352 |
#my @indexstack; |
353 |
|
354 |
# traverse a deeply nested structure, mix in values from given hash, update underlying tangram-object |
355 |
sub _hash2object_traverse_mixin { |
356 |
my $object = shift; |
357 |
my $data = shift; |
358 |
my $bool_recursion = shift; |
359 |
my $options = shift; |
360 |
|
361 |
# clear our key - stack if we are called from user-code (non-recursively) |
362 |
@indexstack = () if (!$bool_recursion); |
363 |
|
364 |
my $classname = ref $object; |
365 |
# if ($classname) { |
366 |
# print STDERR "*****************", Dumper(Class::Tangram::attribute_types($classname)), "\n"; |
367 |
# } |
368 |
|
369 |
# parser: detected OBJECT (a Tangram one?) (reftype == HASH) (assume) |
370 |
# what's exactly done here? hmmm.... it works ;) |
371 |
# maybe a HACK: please try not to use "IntrHash"es, maybe this cannot handle them!!! |
372 |
# extend! check! |
373 |
|
374 |
#print attributes::reftype($object), "\n"; |
375 |
|
376 |
# V1 |
377 |
#if ((attributes::reftype($object) eq 'HASH') && (ref($object) ne 'HASH') && (ref($object) ne 'ARRAY')) { |
378 |
# V2 |
379 |
my $reftype = attributes::reftype($object); |
380 |
#print "reftype: '$reftype'", "\n"; |
381 |
if ($reftype eq 'HASH') { |
382 |
|
383 |
# print STDERR "===", "reftype: ", attributes::reftype($obj), "\n"; |
384 |
|
385 |
my @fields; |
386 |
# loop through fields of object (Tangram-object) |
387 |
@fields = keys %{$object}; |
388 |
|
389 |
# loop through fields of to.be.injected-data (arbitrary Perl-data-structure) |
390 |
@fields = keys %{$data} if $options->{init}; |
391 |
# @fields = keys %{$data} if $options->{mixin}; |
392 |
|
393 |
foreach (@fields) { |
394 |
my $field = $_; |
395 |
push @indexstack, $field; |
396 |
|
397 |
# determine type of object |
398 |
my $ref = ref $object->{$field}; |
399 |
# print STDERR "attrname: $_ ATTRref: $ref", "\n"; |
400 |
if ($ref) { |
401 |
_hash2object_traverse_mixin($object->{$field}, $data, 1, $options); |
402 |
} else { |
403 |
my $val = ref_slot($data, \@indexstack); |
404 |
|
405 |
#print Dumper($options); |
406 |
my $field_target = $field; |
407 |
if (my $pattern = $options->{pattern_strip_key}) { |
408 |
print "pattern: $pattern", "\n"; |
409 |
$field_target =~ s/$pattern//; |
410 |
print "field: $field_target", "\n"; |
411 |
} |
412 |
|
413 |
$object->{$field_target} = $val if defined $val; |
414 |
} |
415 |
pop @indexstack; |
416 |
} |
417 |
|
418 |
# save object to database ... |
419 |
# ... do an update if it already exists, do an insert if it doesn't |
420 |
# my $objectId = $self->{storage}->id($obj); |
421 |
# $logger->debug( __PACKAGE__ . "->saveObjectFromHash_traverse_mixin_update( object $obj objectId $objectId )" ); |
422 |
# if ($objectId) { |
423 |
# $self->{storage}->update($obj); |
424 |
|
425 |
#print __PACKAGE__ . ":", "\n"; |
426 |
#print Dumper($object); |
427 |
|
428 |
# } else { |
429 |
# $self->{storage}->insert($obj); |
430 |
# } |
431 |
|
432 |
} |
433 |
|
434 |
#&& ( ref($obj) ne 'HASH' ) |
435 |
|
436 |
# loop through entries of array (IntrArray, isn't it?) |
437 |
if ((ref $object) eq 'ARRAY') { |
438 |
# print STDERR "===", "refttype ", attributes::reftype($obj), "\n"; |
439 |
my $i = 0; |
440 |
foreach (@{$object}) { |
441 |
push @indexstack, $i; |
442 |
my $ref = ref $_; |
443 |
# print STDERR "attrname: $_ ATTRref: $ref", "\n"; |
444 |
# if ($ref && $_) { |
445 |
if ($ref) { |
446 |
_hash2object_traverse_mixin($_, $data, 1, $options); |
447 |
} else { |
448 |
$object->[$i] = $_ if defined $_; |
449 |
} |
450 |
pop @indexstack; |
451 |
$i++; |
452 |
} |
453 |
|
454 |
=pod |
455 |
# object? |
456 |
} else { |
457 |
print "reference: ", ref $object, "\n"; |
458 |
print "reftype: ", $reftype, "\n"; |
459 |
die(__PACKAGE__ . "->_hash2object_traverse_mixin: can not handle this!"); |
460 |
=cut |
461 |
|
462 |
} |
463 |
|
464 |
} |
465 |
|
466 |
|
467 |
# ACK's go to Randal L. Schwartz <merlyn@stonehenge.com> |
468 |
# on the website: |
469 |
# This text is copyright by Miller-Freeman, Inc., and is used with their permission. |
470 |
# Further distribution or use is not permitted. |
471 |
# please visit http://www.stonehenge.com/merlyn/UnixReview/col30.html |
472 |
sub deep_copy1 { |
473 |
my $this = shift; |
474 |
if (not ref $this) { |
475 |
$this; |
476 |
} elsif (ref $this eq "ARRAY") { |
477 |
[map deep_copy1($_), @$this]; |
478 |
} elsif (ref $this eq "HASH") { |
479 |
+{map { $_ => deep_copy1($this->{$_}) } keys %$this}; |
480 |
} elsif (ref $this eq "CODE") { |
481 |
$this; |
482 |
} else { die "deep_copy1 asks: what type is $this?" } |
483 |
#} else { print "deep_copy asks: what type is $this?", "\n"; } |
484 |
} |
485 |
|
486 |
# ACK's go to Andrew Pitonyak |
487 |
# Copyright 2002, Andrew Pitonyak (perlboy@pitonyak.org) |
488 |
# please visit: http://www.pitonyak.org/code/perl/Pitonyak/DeepCopy.pm.html |
489 |
sub deep_copy { |
490 |
Pitonyak::DeepCopy::deep_copy(@_); |
491 |
} |
492 |
|
493 |
|
494 |
# encodes object-references to serialized string representations |
495 |
# made up of: |
496 |
# - 'o_<classname>_<ref type>_<guid>'??? |
497 |
# - 'o_{guid}_{classname}'!!! |
498 |
sub childObj2string { |
499 |
my $obj = shift; |
500 |
my $option = shift; |
501 |
my $string = 'n/a'; |
502 |
|
503 |
if ($option == 1) { |
504 |
if ((my $classname = ref $obj) && (my $guid = $obj->{guid})) { |
505 |
$string = join('_', 'o', $guid, $classname); |
506 |
} |
507 |
} |
508 |
|
509 |
return $string; |
510 |
} |
511 |
|
512 |
|
513 |
1; |
514 |
__END__ |