/[cvs]/nfo/perl/libs/Data/Mungle/Transform/Deep.pm
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revision 1.4 by joko, Thu Dec 5 13:56:49 2002 UTC revision 1.8 by joko, Sun Feb 9 05:10:56 2003 UTC
# Line 1  Line 1 
1  ##############################################  ## ---------------------------------------------------------------------------
2  #  ##  $Id$
3  #  $Id$  ## ---------------------------------------------------------------------------
4  #  ##  $Log$
5  #  $Log$  ##  Revision 1.8  2003/02/09 05:10:56  joko
6  #  Revision 1.4  2002/12/05 13:56:49  joko  ##  + minor update
7  #  - var_deref  ##
8  #  + expand - more sophisticated dereferencing with callbacks using Iterate  ##  Revision 1.7  2003/01/19 03:26:59  joko
9  #  ##  + added 'sub deep_copy'  -  refactored from libp
10  #  Revision 1.3  2002/12/03 05:34:55  joko  ##  + add 'sub merge'  -  exported from CPAN's 'Hash::Merge'
11  #  + bugfix: now utilizing var_utf2iso from Data::Transform::Encode  ##
12  #  ##  Revision 1.6  2002/12/23 11:27:53  jonen
13  #  Revision 1.2  2002/12/01 04:44:07  joko  ##  + changed behavior WATCH!
14  #  + code from Data::Transform::OO  ##
15  #  ##  Revision 1.5  2002/12/16 19:57:54  joko
16  #  Revision 1.1  2002/11/29 04:49:20  joko  ##  + option 'init'
17  #  + initial check-in  ##
18  #  ##  Revision 1.4  2002/12/05 13:56:49  joko
19  #  Revision 1.1  2002/10/10 03:26:00  cvsjoko  ##  - var_deref
20  #  + new  ##  + expand - more sophisticated dereferencing with callbacks using Iterate
21  #  ##
22  ##############################################  ##  Revision 1.3  2002/12/03 05:34:55  joko
23    ##  + bugfix: now utilizing var_utf2iso from Data::Transform::Encode
24    ##
25    ##  Revision 1.2  2002/12/01 04:44:07  joko
26    ##  + code from Data::Transform::OO
27    ##
28    ##  Revision 1.1  2002/11/29 04:49:20  joko
29    ##  + initial check-in
30    ##
31    ##  Revision 1.1  2002/10/10 03:26:00  cvsjoko
32    ##  + new
33    ## ---------------------------------------------------------------------------
34    
35    
36  package Data::Transform::Deep;  package Data::Transform::Deep;
# Line 36  our @EXPORT_OK = qw( Line 47  our @EXPORT_OK = qw(
47    &hash2object    &hash2object
48    &refexpr2perlref    &refexpr2perlref
49    &expand    &expand
50      &deep_copy
51      &merge
52  );  );
53  #  &var_deref  #  &var_deref
54  #  &getStructSlotByStringyAddress  #  &getStructSlotByStringyAddress
# Line 43  our @EXPORT_OK = qw( Line 56  our @EXPORT_OK = qw(
56  use attributes;  use attributes;
57  use Data::Dumper;  use Data::Dumper;
58  use Data::Transform::Encode qw( var_utf2iso var2utf8 scalar2utf8 );  use Data::Transform::Encode qw( var_utf2iso var2utf8 scalar2utf8 );
59  use libp qw( deep_copy );  
60    use Hash::Merge qw( merge );
61  use Iterate;  use Iterate;
62    
63  sub var_NumericalHashToArray {  sub var_NumericalHashToArray {
# Line 256  sub hash2object { Line 270  sub hash2object {
270    #my $obj = $self->getObject($oid);    #my $obj = $self->getObject($oid);
271    
272    # mix changes into fresh object and save it back    # mix changes into fresh object and save it back
273    hash2object_traverse_mixin($object, $data);    hash2object_traverse_mixin($object, $data, 0, $options);
274    
275    # done in core mixin function?    # done in core mixin function?
276    #$self->{storage}->update($obj);    #$self->{storage}->update($obj);
# Line 283  sub hash2object_traverse_mixin { Line 297  sub hash2object_traverse_mixin {
297    my $object = shift;    my $object = shift;
298    my $data = shift;    my $data = shift;
299    my $bool_recursion = shift;    my $bool_recursion = shift;
300      my $options = shift;
301    
302    # clear our key - stack if we are called from user-code (non-recursively)    # clear our key - stack if we are called from user-code (non-recursively)
303    @indexstack = () if (!$bool_recursion);    @indexstack = () if (!$bool_recursion);
# Line 300  sub hash2object_traverse_mixin { Line 315  sub hash2object_traverse_mixin {
315    
316  #    print STDERR "===", "reftype: ", attributes::reftype($obj), "\n";  #    print STDERR "===", "reftype: ", attributes::reftype($obj), "\n";
317                    
318        my @fields;
319      # loop through fields of object (Tangram-object)      # loop through fields of object (Tangram-object)
320      foreach (keys %{$object}) {      @fields = keys %{$object};
321        push @indexstack, $_;  
322        # loop through fields of to.be.injected-data (arbitrary Perl-data-structure)
323        @fields = keys %{$data} if $options->{init};
324    #    @fields = keys %{$data} if $options->{mixin};
325        
326        foreach (@fields) {
327          my $field = $_;
328          push @indexstack, $field;
329                            
330        # determine type of object        # determine type of object
331        my $ref = ref $object->{$_};        my $ref = ref $object->{$field};
332  #      print STDERR "attrname: $_  ATTRref: $ref", "\n";  #      print STDERR "attrname: $_  ATTRref: $ref", "\n";
333        if ($ref) {        if ($ref) {
334          hash2object_traverse_mixin($object->{$_}, $data, 1);          hash2object_traverse_mixin($object->{$field}, $data, 1, $options);
335        } else {        } else {
336          my $val = getStructSlotByStringyAddress($data, \@indexstack);          my $val = getStructSlotByStringyAddress($data, \@indexstack);
337          $object->{$_} = $val;                  
338    #print Dumper($options);
339            my $field_target = $field;
340            if (my $pattern = $options->{pattern_strip_key}) {
341              print "pattern: $pattern", "\n";
342              $field_target =~ s/$pattern//;
343              print "field: $field_target", "\n";
344            }
345    
346            $object->{$field_target} = $val if defined $val;
347        }        }
348        pop @indexstack;        pop @indexstack;
349      }      }
# Line 342  sub hash2object_traverse_mixin { Line 374  sub hash2object_traverse_mixin {
374        push @indexstack, $i;        push @indexstack, $i;
375        my $ref = ref $_;        my $ref = ref $_;
376  #      print STDERR "attrname: $_  ATTRref: $ref", "\n";  #      print STDERR "attrname: $_  ATTRref: $ref", "\n";
377        if ($ref && $_) {  #      if ($ref && $_) {
378          hash2object_traverse_mixin($_, $data, 1);        if ($ref) {
379            hash2object_traverse_mixin($_, $data, 1, $options);
380        } else {        } else {
381          $object->[$i] = $_;          $object->[$i] = $_ if defined $_;
382        }        }
383        pop @indexstack;        pop @indexstack;
384        $i++;        $i++;
# Line 356  sub hash2object_traverse_mixin { Line 389  sub hash2object_traverse_mixin {
389    
390    
391  # this function seems to do similar stuff like these below (refexpr2perlref & co.)  # this function seems to do similar stuff like these below (refexpr2perlref & co.)
392    # TODO: maybe this mechanism can be replaced completely through some nice module from CPAN .... ?   ;-)
393  sub getStructSlotByStringyAddress {  sub getStructSlotByStringyAddress {
394    my $var = shift;    my $var = shift;
395    my $indexstack_ref = shift;    my $indexstack_ref = shift;
# Line 439  sub refexpr2perlref_parts { Line 473  sub refexpr2perlref_parts {
473    return (join('->', @parts_capsule), \@parts_pure);    return (join('->', @parts_capsule), \@parts_pure);
474  }  }
475    
476    # ACK's go to ...
477    sub deep_copy {
478      my $this = shift;
479      if (not ref $this) {
480        $this;
481      } elsif (ref $this eq "ARRAY") {
482        [map deep_copy($_), @$this];
483      } elsif (ref $this eq "HASH") {
484        +{map { $_ => deep_copy($this->{$_}) } keys %$this};
485      } elsif (ref $this eq "CODE") {
486        $this;
487      #} else { die "deep_copy asks: what type is $this?" }
488      } else { print "deep_copy asks: what type is $this?", "\n"; }
489    }
490    
491  1;  1;
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