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## --------------------------------------------------------------------------- |
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## $Id: Deep.pm,v 1.10 2003/02/20 20:48:00 joko Exp $ |
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## --------------------------------------------------------------------------- |
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## $Log: Deep.pm,v $ |
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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::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; |
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our @ISA = qw( Exporter ); |
| 50 |
our @EXPORT_OK = qw( |
| 51 |
&expand |
| 52 |
&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 Data::Transform::Encode qw( latin_to_utf8 latin_to_utf8_scalar utf8_to_latin utf8_to_latin_scalar ); |
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use Data::Code::Ref qw( ref_slot ); |
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|
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sub numhash2list { |
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my $vref = shift; |
| 66 |
#my $context = shift; |
| 67 |
if (ref $vref eq 'HASH') { |
| 68 |
foreach (keys %{$vref}) { |
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# if ((ref $vref->{$_}) =~ m/HASH/) { |
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if ((ref $vref->{$_}) =~ m/HASH/) { |
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if ($vref->{$_}{0}) { # might be a numerical-indexed array |
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#print "000\n"; |
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#print "context: $context\n"; |
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my @arr; |
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foreach my $key_numeric (sort keys %{$vref->{$_}}) { |
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push @arr, $vref->{$_}{$key_numeric}; |
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} |
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$vref->{$_} = \@arr; |
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} |
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numhash2list($vref->{$_}); |
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} |
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# } else { |
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# #$vref->{$_} = scalar2iso($vref->{$_}); |
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# } |
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} |
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} |
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} |
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|
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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 |
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sub _var_deref_test { |
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my $obj = shift; |
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my $options = shift; |
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my $result; |
| 97 |
if ((ref $obj) eq 'ARRAY') { |
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foreach (@{$obj}) { |
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my $ref = ref $_; |
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if ($ref) { |
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push(@{$result}, var_deref($_, $options)); |
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#undef $_; |
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} else { |
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#push(@{$result}, $_); |
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push(@{$result}, deep_copy($_)); |
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} |
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#undef $_ if $options->{destroy}; |
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#$options->{destroy}->($_) if $options->{destroy}; |
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} |
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# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ??? |
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} else { |
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foreach (keys %{$obj}) { |
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my $key = $_; |
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my $ref = ref $obj->{$_}; |
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if ($ref) { |
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$result->{$_} = var_deref($obj->{$_}, $options); |
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#undef $obj->{$_}; |
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} 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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} |
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|
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|
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sub expand { |
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|
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my $obj = shift; |
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my $options = shift; |
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my $result; |
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|
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#print "ref: ", ref $obj, "\n"; |
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|
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if (ref $obj eq 'ARRAY') { |
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|
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IterArray @$obj, sub { |
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my $item; |
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# if current item is a reference ... |
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if (ref $_[0]) { |
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# ... expand structure recursively |
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$item = expand($_[0], $options); |
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# destroy item via seperate callback method (a POST) if requested |
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#$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 && $options->{utf8}); |
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$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin}); |
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} |
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#push(@{$result}, $item) if $item; # use item only if not undef (TODO: make configurable via $options) |
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push(@{$result}, $item); # use item in any case |
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|
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} |
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|
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} elsif (ref $obj eq 'CODE') { |
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#print Dumper($obj); |
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#exit; |
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|
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# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ??? |
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} elsif (ref $obj) { |
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|
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IterHash %$obj, sub { |
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my $item; |
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|
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# if current item is a reference ... |
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if (ref $_[1]) { |
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# ... expand structure recursively |
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$item = expand($_[1], $options); |
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# destroy item via seperate callback method (a POST) if requested |
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#$options->{cb}->{destroy}->($_[1]) 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($_[1]); |
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$item = $_[1]; |
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# conversions/encodings |
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$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8}); |
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$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin}); |
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} |
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#$result->{$_[0]} = $item if $item; # use item only if not undef (TODO: make configurable via $options) |
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$result->{$_[0]} = $item; # use item in any case |
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} |
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|
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} else { |
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#die ("not a reference!"); |
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$result = $obj; |
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|
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} |
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|
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# convert all values to utf8 (inside complex struct) |
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# now done in core-item-callbacks via Greg London's "Iterate" from CPAN |
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# var2utf8($result) if ($options->{utf8}); |
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|
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# destroy persistent object from memory to be sure to get a fresh one next time |
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#undef $obj if $options->{destroy}; |
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#$options->{cb_destroy}->($obj) if $options->{cb_destroy}; |
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#$options->{cb}->{destroy}->($obj) if $options->{destroy}; |
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|
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return $result; |
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} |
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|
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|
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|
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my @indexstack; |
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sub _var_traverse_mixin_update_old { |
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my $obj = shift; |
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my $data = shift; |
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my $bool_recursion = shift; |
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if (!$bool_recursion) { |
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@indexstack = (); |
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} |
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my $result; |
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|
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# 'ARRAY' does not work! |
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if ((ref $obj) eq 'ARRAY') { |
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#print "ARRAY\n"; |
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my $i = 0; |
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foreach (@{$obj}) { |
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push @indexstack, $i; |
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my $ref = ref $_; |
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if ($ref) { |
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#$obj->[$i] = var_mixin($_, $data, 1); |
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var_traverse_mixin_update($_, $data, 1); |
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} else { |
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$obj->[$i] = $_; |
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} |
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pop @indexstack; |
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$i++; |
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} |
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} else { |
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foreach (keys %{$obj}) { |
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push @indexstack, $_; |
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my $ref = ref $obj->{$_}; |
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if ($ref) { |
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#$obj->{$_} = var_mixin($obj->{$_}, $data, 1); |
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var_traverse_mixin_update($obj->{$_}, $data, 1); |
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} else { |
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#$obj->{$_} = $obj->{$_}; |
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my $evstring = getSlot($data); |
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$obj->{$_} = $evstring; |
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|
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} |
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pop @indexstack; |
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} |
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} |
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#return $result; |
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} |
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|
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sub merge_to { |
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_hash2object(@_); |
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# TODO: |
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# re-implement using CPAN's "Iterate". |
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} |
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|
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|
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# todo: maybe do diff(s) here sometimes!? |
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sub _hash2object { |
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my $object = shift; |
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my $data = shift; |
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my $options = shift; |
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|
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#print "hash2object", "\n"; |
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|
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# "patch" needed 'cause php passes numerical-indexed-arrays as hash-tables, |
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# this method corrects this |
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numhash2list($data) if ($options->{php}); |
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|
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# utf8-conversion/-encoding (essential for I18N) |
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var_utf2iso($data) if ($options->{utf8}); |
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|
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# get fresh object from database |
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# todo: |
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# - handle "locked" objects !!! |
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# - check if already another update occoured (object-revisioning needed!) |
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#my $obj = $self->getObject($oid); |
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|
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# mix changes into fresh object and save it back |
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_hash2object_traverse_mixin($object, $data, 0, $options); |
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|
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# done in core mixin function? |
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#$self->{storage}->update($obj); |
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|
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# we should "undef" some objects here to destroy them in memory and enforce reloading when used next time |
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# simulate: |
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#$self->{storage}->disconnect(); |
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|
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} |
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|
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# ------------------------------------ |
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# core mixin function |
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# TODO-FEATURE: make this possible in a reverse way: object is empty (no fields) and gets filled up by mixin-data |
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|
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# remember keys of structures we are traversing |
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# this is a HACK: |
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# - don't (!!!) "packageglobal" @indexstack |
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# - it will lead to problems with parallelism! |
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|
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#my @indexstack; |
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|
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# traverse a deeply nested structure, mix in values from given hash, update underlying tangram-object |
| 310 |
sub _hash2object_traverse_mixin { |
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my $object = shift; |
| 312 |
my $data = shift; |
| 313 |
my $bool_recursion = shift; |
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my $options = shift; |
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|
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# clear our key - stack if we are called from user-code (non-recursively) |
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@indexstack = () if (!$bool_recursion); |
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|
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my $classname = ref $object; |
| 320 |
# if ($classname) { |
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# print STDERR "*****************", Dumper(Class::Tangram::attribute_types($classname)), "\n"; |
| 322 |
# } |
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|
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# parser: detected OBJECT (a Tangram one?) (reftype == HASH) (assume) |
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# what's exactly done here? hmmm.... it works ;) |
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# maybe a HACK: please try not to use "IntrHash"es, maybe this cannot handle them!!! |
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# extend! check! |
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|
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#print attributes::reftype($object), "\n"; |
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|
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# V1 |
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#if ((attributes::reftype($object) eq 'HASH') && (ref($object) ne 'HASH') && (ref($object) ne 'ARRAY')) { |
| 333 |
# V2 |
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my $reftype = attributes::reftype($object); |
| 335 |
#print "reftype: '$reftype'", "\n"; |
| 336 |
if ($reftype eq 'HASH') { |
| 337 |
|
| 338 |
# print STDERR "===", "reftype: ", attributes::reftype($obj), "\n"; |
| 339 |
|
| 340 |
my @fields; |
| 341 |
# loop through fields of object (Tangram-object) |
| 342 |
@fields = keys %{$object}; |
| 343 |
|
| 344 |
# loop through fields of to.be.injected-data (arbitrary Perl-data-structure) |
| 345 |
@fields = keys %{$data} if $options->{init}; |
| 346 |
# @fields = keys %{$data} if $options->{mixin}; |
| 347 |
|
| 348 |
foreach (@fields) { |
| 349 |
my $field = $_; |
| 350 |
push @indexstack, $field; |
| 351 |
|
| 352 |
# determine type of object |
| 353 |
my $ref = ref $object->{$field}; |
| 354 |
# print STDERR "attrname: $_ ATTRref: $ref", "\n"; |
| 355 |
if ($ref) { |
| 356 |
_hash2object_traverse_mixin($object->{$field}, $data, 1, $options); |
| 357 |
} else { |
| 358 |
my $val = ref_slot($data, \@indexstack); |
| 359 |
|
| 360 |
#print Dumper($options); |
| 361 |
my $field_target = $field; |
| 362 |
if (my $pattern = $options->{pattern_strip_key}) { |
| 363 |
print "pattern: $pattern", "\n"; |
| 364 |
$field_target =~ s/$pattern//; |
| 365 |
print "field: $field_target", "\n"; |
| 366 |
} |
| 367 |
|
| 368 |
$object->{$field_target} = $val if defined $val; |
| 369 |
} |
| 370 |
pop @indexstack; |
| 371 |
} |
| 372 |
|
| 373 |
# save object to database ... |
| 374 |
# ... do an update if it already exists, do an insert if it doesn't |
| 375 |
# my $objectId = $self->{storage}->id($obj); |
| 376 |
# $logger->debug( __PACKAGE__ . "->saveObjectFromHash_traverse_mixin_update( object $obj objectId $objectId )" ); |
| 377 |
# if ($objectId) { |
| 378 |
# $self->{storage}->update($obj); |
| 379 |
|
| 380 |
#print __PACKAGE__ . ":", "\n"; |
| 381 |
#print Dumper($object); |
| 382 |
|
| 383 |
# } else { |
| 384 |
# $self->{storage}->insert($obj); |
| 385 |
# } |
| 386 |
|
| 387 |
} |
| 388 |
|
| 389 |
#&& ( ref($obj) ne 'HASH' ) |
| 390 |
|
| 391 |
# loop through entries of array (IntrArray, isn't it?) |
| 392 |
if ((ref $object) eq 'ARRAY') { |
| 393 |
# print STDERR "===", "refttype ", attributes::reftype($obj), "\n"; |
| 394 |
my $i = 0; |
| 395 |
foreach (@{$object}) { |
| 396 |
push @indexstack, $i; |
| 397 |
my $ref = ref $_; |
| 398 |
# print STDERR "attrname: $_ ATTRref: $ref", "\n"; |
| 399 |
# if ($ref && $_) { |
| 400 |
if ($ref) { |
| 401 |
_hash2object_traverse_mixin($_, $data, 1, $options); |
| 402 |
} else { |
| 403 |
$object->[$i] = $_ if defined $_; |
| 404 |
} |
| 405 |
pop @indexstack; |
| 406 |
$i++; |
| 407 |
} |
| 408 |
|
| 409 |
=pod |
| 410 |
# object? |
| 411 |
} else { |
| 412 |
print "reference: ", ref $object, "\n"; |
| 413 |
print "reftype: ", $reftype, "\n"; |
| 414 |
die(__PACKAGE__ . "->_hash2object_traverse_mixin: can not handle this!"); |
| 415 |
=cut |
| 416 |
|
| 417 |
} |
| 418 |
|
| 419 |
} |
| 420 |
|
| 421 |
|
| 422 |
# ACK's go to Randal L. Schwartz <merlyn@stonehenge.com> |
| 423 |
# on the website: |
| 424 |
# This text is copyright by Miller-Freeman, Inc., and is used with their permission. |
| 425 |
# Further distribution or use is not permitted. |
| 426 |
# please visit http://www.stonehenge.com/merlyn/UnixReview/col30.html |
| 427 |
sub deep_copy1 { |
| 428 |
my $this = shift; |
| 429 |
if (not ref $this) { |
| 430 |
$this; |
| 431 |
} elsif (ref $this eq "ARRAY") { |
| 432 |
[map deep_copy1($_), @$this]; |
| 433 |
} elsif (ref $this eq "HASH") { |
| 434 |
+{map { $_ => deep_copy1($this->{$_}) } keys %$this}; |
| 435 |
} elsif (ref $this eq "CODE") { |
| 436 |
$this; |
| 437 |
} else { die "deep_copy1 asks: what type is $this?" } |
| 438 |
#} else { print "deep_copy asks: what type is $this?", "\n"; } |
| 439 |
} |
| 440 |
|
| 441 |
# ACK's go to Andrew Pitonyak |
| 442 |
# Copyright 2002, Andrew Pitonyak (perlboy@pitonyak.org) |
| 443 |
# please visit: http://www.pitonyak.org/code/perl/Pitonyak/DeepCopy.pm.html |
| 444 |
sub deep_copy { |
| 445 |
Pitonyak::deep_copy(@_); |
| 446 |
} |
| 447 |
|
| 448 |
1; |
| 449 |
__END__ |
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