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############################################## |
## --------------------------------------------------------------------------- |
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# |
## $Id$ |
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# $Id$ |
## --------------------------------------------------------------------------- |
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# |
## $Log$ |
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# $Log$ |
## Revision 1.7 2003/01/19 03:26:59 joko |
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# Revision 1.1 2002/11/29 04:49:20 joko |
## + added 'sub deep_copy' - refactored from libp |
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# + initial check-in |
## + add 'sub merge' - exported from CPAN's 'Hash::Merge' |
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# |
## |
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# Revision 1.1 2002/10/10 03:26:00 cvsjoko |
## Revision 1.6 2002/12/23 11:27:53 jonen |
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# + new |
## + 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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package Data::Transform::Deep; |
package Data::Transform::Deep; |
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|
|
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require Exporter; |
require Exporter; |
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our @ISA = qw( Exporter ); |
our @ISA = qw( Exporter ); |
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our @EXPORT_OK = qw( |
our @EXPORT_OK = qw( |
| 41 |
&var_NumericalHashToArray |
&var_NumericalHashToArray |
| 42 |
&var_deref |
&var_mixin |
| 43 |
&var_mixin |
&object2hash |
| 44 |
&getStructSlotByStringyAddress |
&hash2object |
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|
&refexpr2perlref |
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|
&expand |
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|
&deep_copy |
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|
&merge |
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); |
); |
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# &var_deref |
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# &getStructSlotByStringyAddress |
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|
|
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use attributes; |
use attributes; |
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|
use Data::Dumper; |
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use Data::Transform::Encode qw( var_utf2iso var2utf8 scalar2utf8 ); |
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|
|
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use Hash::Merge qw( merge ); |
| 58 |
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#use libp qw( deep_copy ); |
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|
use Iterate; |
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|
|
| 61 |
sub var_NumericalHashToArray { |
sub var_NumericalHashToArray { |
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my $vref = shift; |
my $vref = shift; |
| 86 |
|
|
| 87 |
sub var_deref { |
sub var_deref { |
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my $obj = shift; |
my $obj = shift; |
| 89 |
|
my $options = shift; |
| 90 |
my $result; |
my $result; |
| 91 |
if ((ref $obj) eq 'ARRAY') { |
if ((ref $obj) eq 'ARRAY') { |
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foreach (@{$obj}) { |
foreach (@{$obj}) { |
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my $ref = ref $_; |
my $ref = ref $_; |
| 94 |
if ($ref) { |
if ($ref) { |
| 95 |
push(@{$result}, var_deref($_)); |
push(@{$result}, var_deref($_, $options)); |
| 96 |
|
#undef $_; |
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} else { |
} else { |
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push(@{$result}, $_); |
#push(@{$result}, $_); |
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|
push(@{$result}, deep_copy($_)); |
| 100 |
} |
} |
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|
#undef $_ if $options->{destroy}; |
| 102 |
|
#$options->{destroy}->($_) if $options->{destroy}; |
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} |
} |
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|
# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ??? |
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} else { |
} else { |
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foreach (keys %{$obj}) { |
foreach (keys %{$obj}) { |
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my $key = $_; |
my $key = $_; |
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my $ref = ref $obj->{$_}; |
my $ref = ref $obj->{$_}; |
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if ($ref) { |
if ($ref) { |
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$result->{$_} = var_deref($obj->{$_}); |
$result->{$_} = var_deref($obj->{$_}, $options); |
| 111 |
|
#undef $obj->{$_}; |
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} else { |
} else { |
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$result->{$_} = $obj->{$_}; |
#$result->{$_} = $obj->{$_}; |
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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; |
return $result; |
| 123 |
} |
} |
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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; |
| 129 |
|
my $options = shift; |
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my $result; |
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|
| 132 |
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if ((ref $obj) eq 'ARRAY') { |
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|
| 134 |
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IterArray @$obj, sub { |
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my $item; |
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|
# if current item is a reference ... |
| 137 |
|
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 $options->{destroy}; |
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|
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# ... assume plain scalar |
| 144 |
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} else { |
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#$item = deep_copy($_[0]); |
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|
$item = $_[0]; |
| 147 |
|
# conversions/encodings |
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|
$item = scalar2utf8($item) if ($item && $options->{utf8}); |
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} |
| 150 |
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#push(@{$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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# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ??? |
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} else { |
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|
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IterHash %$obj, sub { |
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my $item; |
| 160 |
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|
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# if current item is a reference ... |
| 162 |
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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 $options->{destroy}; |
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|
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# ... assume plain scalar |
| 169 |
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} else { |
| 170 |
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#$item = deep_copy($_[1]); |
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$item = $_[1]; |
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# conversions/encodings |
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$item = scalar2utf8($item) if ($item && $options->{utf8}); |
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} |
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#$result->{$_[0]} = $item if $item; # use item only if not undef (TODO: make configurable via $options) |
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$result->{$_[0]} = $item; # use item in any case |
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} |
| 178 |
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|
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} |
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|
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# convert all values to utf8 (inside complex struct) |
| 182 |
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# now done in core-item-callbacks via Greg London's "Iterate" from CPAN |
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# var2utf8($result) if ($options->{utf8}); |
| 184 |
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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}; |
| 189 |
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|
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return $result; |
| 191 |
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} |
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|
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|
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|
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my @indexstack; |
my @indexstack; |
| 237 |
#return $result; |
#return $result; |
| 238 |
} |
} |
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|
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sub object2hash { |
| 241 |
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my $object = shift; |
| 242 |
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my $options = shift; |
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#my $deref = var_deref($object); |
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my $deref = expand($object, $options); |
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#var2utf8($deref) if ($options->{utf8}); |
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return $deref; |
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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 $options = shift; |
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|
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#print "hash2object", "\n"; |
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|
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# "patch" needed 'cause php passes numerical-indexed-arrays as hash-tables, |
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# this method corrects this |
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var_NumericalHashToArray($data) if ($options->{php}); |
| 260 |
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|
| 261 |
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# utf8-conversion/-encoding (essential for I18N) |
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var_utf2iso($data) if ($options->{utf8}); |
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|
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# get fresh object from database |
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# todo: |
| 266 |
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# - handle "locked" objects !!! |
| 267 |
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# - check if already another update occoured (object-revisioning needed!) |
| 268 |
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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($obj); |
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|
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# we should "undef" some objects here to destroy them in memory and enforce reloading when used next time |
| 277 |
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# simulate: |
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#$self->{storage}->disconnect(); |
| 279 |
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|
| 280 |
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} |
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|
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# ------------------------------------ |
| 283 |
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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 |
| 285 |
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|
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# remember keys of structures we are traversing |
| 287 |
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# this is a HACK: |
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# - don't (!!!) "packageglobal" @indexstack |
| 289 |
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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 |
| 294 |
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sub hash2object_traverse_mixin { |
| 295 |
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my $object = shift; |
| 296 |
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my $data = shift; |
| 297 |
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my $bool_recursion = shift; |
| 298 |
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my $options = shift; |
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|
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# clear our key - stack if we are called from user-code (non-recursively) |
| 301 |
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@indexstack = () if (!$bool_recursion); |
| 302 |
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|
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my $classname = ref $object; |
| 304 |
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# if ($classname) { |
| 305 |
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# print STDERR "*****************", Dumper(Class::Tangram::attribute_types($classname)), "\n"; |
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# } |
| 307 |
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|
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# parser: detected OBJECT (a Tangram one?) (reftype == HASH) (assume) |
| 309 |
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# what's exactly done here? hmmm.... it works ;) |
| 310 |
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# maybe a HACK: please try not to use "IntrHash"es, maybe this cannot handle them!!! |
| 311 |
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# extend! check! |
| 312 |
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if ((attributes::reftype($object) eq 'HASH') && (ref($object) ne 'HASH') && (ref($object) ne 'ARRAY')) { |
| 313 |
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|
| 314 |
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# print STDERR "===", "reftype: ", attributes::reftype($obj), "\n"; |
| 315 |
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|
| 316 |
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my @fields; |
| 317 |
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# loop through fields of object (Tangram-object) |
| 318 |
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@fields = keys %{$object}; |
| 319 |
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|
| 320 |
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# loop through fields of to.be.injected-data (arbitrary Perl-data-structure) |
| 321 |
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@fields = keys %{$data} if $options->{init}; |
| 322 |
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# @fields = keys %{$data} if $options->{mixin}; |
| 323 |
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|
| 324 |
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foreach (@fields) { |
| 325 |
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my $field = $_; |
| 326 |
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push @indexstack, $field; |
| 327 |
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|
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# determine type of object |
| 329 |
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my $ref = ref $object->{$field}; |
| 330 |
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# print STDERR "attrname: $_ ATTRref: $ref", "\n"; |
| 331 |
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if ($ref) { |
| 332 |
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hash2object_traverse_mixin($object->{$field}, $data, 1, $options); |
| 333 |
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} else { |
| 334 |
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my $val = getStructSlotByStringyAddress($data, \@indexstack); |
| 335 |
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|
| 336 |
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print Dumper($options); |
| 337 |
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my $field_target = $field; |
| 338 |
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if (my $pattern = $options->{pattern_strip_key}) { |
| 339 |
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print "pattern: $pattern", "\n"; |
| 340 |
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$field_target =~ s/$pattern//; |
| 341 |
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print "field: $field_target", "\n"; |
| 342 |
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} |
| 343 |
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|
| 344 |
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$object->{$field_target} = $val if defined $val; |
| 345 |
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} |
| 346 |
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pop @indexstack; |
| 347 |
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} |
| 348 |
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|
| 349 |
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# save object to database ... |
| 350 |
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# ... do an update if it already exists, do an insert if it doesn't |
| 351 |
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# my $objectId = $self->{storage}->id($obj); |
| 352 |
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# $logger->debug( __PACKAGE__ . "->saveObjectFromHash_traverse_mixin_update( object $obj objectId $objectId )" ); |
| 353 |
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# if ($objectId) { |
| 354 |
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# $self->{storage}->update($obj); |
| 355 |
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|
| 356 |
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#print __PACKAGE__ . ":", "\n"; |
| 357 |
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#print Dumper($object); |
| 358 |
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|
| 359 |
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# } else { |
| 360 |
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# $self->{storage}->insert($obj); |
| 361 |
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# } |
| 362 |
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| 363 |
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} |
| 364 |
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|
| 365 |
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#&& ( ref($obj) ne 'HASH' ) |
| 366 |
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|
| 367 |
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# loop through entries of array (IntrArray, isn't it?) |
| 368 |
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if ((ref $object) eq 'ARRAY') { |
| 369 |
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# print STDERR "===", "refttype ", attributes::reftype($obj), "\n"; |
| 370 |
|
my $i = 0; |
| 371 |
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foreach (@{$object}) { |
| 372 |
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push @indexstack, $i; |
| 373 |
|
my $ref = ref $_; |
| 374 |
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# print STDERR "attrname: $_ ATTRref: $ref", "\n"; |
| 375 |
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# if ($ref && $_) { |
| 376 |
|
if ($ref) { |
| 377 |
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hash2object_traverse_mixin($_, $data, 1, $options); |
| 378 |
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} else { |
| 379 |
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$object->[$i] = $_ if defined $_; |
| 380 |
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} |
| 381 |
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pop @indexstack; |
| 382 |
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$i++; |
| 383 |
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} |
| 384 |
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} |
| 385 |
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|
| 386 |
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} |
| 387 |
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|
| 388 |
|
|
| 389 |
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# this function seems to do similar stuff like these below (refexpr2perlref & co.) |
| 390 |
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# TODO: maybe this mechanism can be replaced completely through some nice module from CPAN .... ? ;-) |
| 391 |
sub getStructSlotByStringyAddress { |
sub getStructSlotByStringyAddress { |
| 392 |
my $var = shift; |
my $var = shift; |
| 393 |
my $indexstack_ref = shift; |
my $indexstack_ref = shift; |
| 406 |
return eval($evstring); |
return eval($evstring); |
| 407 |
} |
} |
| 408 |
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|
| 409 |
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|
| 410 |
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sub refexpr2perlref { |
| 411 |
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|
| 412 |
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my $obj = shift; |
| 413 |
|
my $expr = shift; |
| 414 |
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my $callbackMap = shift; |
| 415 |
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|
| 416 |
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my $value; |
| 417 |
|
# detect for callback (code-reference) |
| 418 |
|
if (ref($expr) eq 'CODE') { |
| 419 |
|
$value = &$expr($obj); |
| 420 |
|
|
| 421 |
|
} elsif ($expr =~ m/->/) { |
| 422 |
|
# use expr as complex object reference declaration (obj->subObj->subSubObj->0->attribute) |
| 423 |
|
(my $objPerlRefString, my $parts) = refexpr2perlref_parts($expr); |
| 424 |
|
#print "\n", "expr: $expr"; |
| 425 |
|
#print "\n", "objPerlRefString: $objPerlRefString"; |
| 426 |
|
$value = eval('$obj' . '->' . $objPerlRefString); |
| 427 |
|
|
| 428 |
|
# if value isn't set, try to "fallback" to callbackMap |
| 429 |
|
# callbacks are applied this way: |
| 430 |
|
# take the last element of the expression parts and check if this string exists as a key in the callback-map |
| 431 |
|
if (!$value && $callbackMap) { |
| 432 |
|
#print Dumper($callbackMap); |
| 433 |
|
|
| 434 |
|
# prepare needle |
| 435 |
|
my @parts = @$parts; |
| 436 |
|
my $count = $#parts; |
| 437 |
|
my $needle = $parts[$count]; |
| 438 |
|
|
| 439 |
|
# prepare haystack |
| 440 |
|
my @haystack = keys %$callbackMap; |
| 441 |
|
if (grep($needle, @haystack)) { |
| 442 |
|
$value = $callbackMap->{$needle}->(); |
| 443 |
|
#print "value: ", $value, "\n"; |
| 444 |
|
} |
| 445 |
|
} |
| 446 |
|
|
| 447 |
|
} else { |
| 448 |
|
# use expr as simple scalar key (attributename) |
| 449 |
|
$value = $obj->{$expr}; |
| 450 |
|
} |
| 451 |
|
|
| 452 |
|
return $value; |
| 453 |
|
|
| 454 |
|
} |
| 455 |
|
|
| 456 |
|
|
| 457 |
|
sub refexpr2perlref_parts { |
| 458 |
|
my $expr = shift; |
| 459 |
|
|
| 460 |
|
# split expression by dereference operators first |
| 461 |
|
my @parts_pure = split(/->/, $expr); |
| 462 |
|
|
| 463 |
|
# wrap []'s around each part, if it consists of numeric characters only (=> numeric = array-index), |
| 464 |
|
# use {}'s, if there are word-characters in it (=> alphanumeric = hash-key) |
| 465 |
|
my @parts_capsule = @parts_pure; |
| 466 |
|
map { |
| 467 |
|
m/^\d+$/ && ($_ = "[$_]") || ($_ = "{$_}"); |
| 468 |
|
} @parts_capsule; |
| 469 |
|
|
| 470 |
|
# join parts with dereference operators together again and return built string |
| 471 |
|
return (join('->', @parts_capsule), \@parts_pure); |
| 472 |
|
} |
| 473 |
|
|
| 474 |
|
# ACK's go to ... |
| 475 |
|
sub deep_copy { |
| 476 |
|
my $this = shift; |
| 477 |
|
if (not ref $this) { |
| 478 |
|
$this; |
| 479 |
|
} elsif (ref $this eq "ARRAY") { |
| 480 |
|
[map deep_copy($_), @$this]; |
| 481 |
|
} elsif (ref $this eq "HASH") { |
| 482 |
|
+{map { $_ => deep_copy($this->{$_}) } keys %$this}; |
| 483 |
|
} elsif (ref $this eq "CODE") { |
| 484 |
|
$this; |
| 485 |
|
#} else { die "deep_copy asks: what type is $this?" } |
| 486 |
|
} else { print "deep_copy asks: what type is $this?", "\n"; } |
| 487 |
|
} |
| 488 |
|
|
| 489 |
1; |
1; |
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