/[cvs]/nfo/perl/libs/Data/Mungle/Transform/Deep.pm
ViewVC logotype

Diff of /nfo/perl/libs/Data/Mungle/Transform/Deep.pm

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1.3 by joko, Tue Dec 3 05:34:55 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 1.3  2002/12/03 05:34:55  joko  ##  + minor update
7  #  + bugfix: now utilizing var_utf2iso from Data::Transform::Encode  ##
8  #  ##  Revision 1.7  2003/01/19 03:26:59  joko
9  #  Revision 1.2  2002/12/01 04:44:07  joko  ##  + added 'sub deep_copy'  -  refactored from libp
10  #  + code from Data::Transform::OO  ##  + add 'sub merge'  -  exported from CPAN's 'Hash::Merge'
11  #  ##
12  #  Revision 1.1  2002/11/29 04:49:20  joko  ##  Revision 1.6  2002/12/23 11:27:53  jonen
13  #  + initial check-in  ##  + changed behavior WATCH!
14  #  ##
15  #  Revision 1.1  2002/10/10 03:26:00  cvsjoko  ##  Revision 1.5  2002/12/16 19:57:54  joko
16  #  + new  ##  + option 'init'
17  #  ##
18  ##############################################  ##  Revision 1.4  2002/12/05 13:56:49  joko
19    ##  - var_deref
20    ##  + 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 27  require Exporter; Line 42  require Exporter;
42  our @ISA = qw( Exporter );  our @ISA = qw( Exporter );
43  our @EXPORT_OK = qw(  our @EXPORT_OK = qw(
44    &var_NumericalHashToArray    &var_NumericalHashToArray
   &var_deref  
45    &var_mixin    &var_mixin
46    &object2hash    &object2hash
47    &hash2object    &hash2object
48    &refexpr2perlref    &refexpr2perlref
49      &expand
50      &deep_copy
51      &merge
52  );  );
53    #  &var_deref
54  #  &getStructSlotByStringyAddress  #  &getStructSlotByStringyAddress
55    
56  use attributes;  use attributes;
57  use Data::Dumper;  use Data::Dumper;
58  use Data::Transform::Encode qw( var_utf2iso );  use Data::Transform::Encode qw( var_utf2iso var2utf8 scalar2utf8 );
59    
60    use Hash::Merge qw( merge );
61    use Iterate;
62    
63  sub var_NumericalHashToArray {  sub var_NumericalHashToArray {
64    my $vref = shift;    my $vref = shift;
# Line 67  sub var_NumericalHashToArray { Line 88  sub var_NumericalHashToArray {
88    
89  sub var_deref {  sub var_deref {
90    my $obj = shift;    my $obj = shift;
91      my $options = shift;
92    my $result;    my $result;
93    if ((ref $obj) eq 'ARRAY') {    if ((ref $obj) eq 'ARRAY') {
94      foreach (@{$obj}) {      foreach (@{$obj}) {
95        my $ref = ref $_;        my $ref = ref $_;
96        if ($ref) {        if ($ref) {
97          push(@{$result}, var_deref($_));          push(@{$result}, var_deref($_, $options));
98            #undef $_;
99        } else {        } else {
100          push(@{$result}, $_);          #push(@{$result}, $_);
101            push(@{$result}, deep_copy($_));
102        }        }
103          #undef $_ if $options->{destroy};
104          #$options->{destroy}->($_) if $options->{destroy};
105      }      }
106    # TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }"  ???    # TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }"  ???
107    } else {    } else {
# Line 83  sub var_deref { Line 109  sub var_deref {
109        my $key = $_;        my $key = $_;
110        my $ref = ref $obj->{$_};        my $ref = ref $obj->{$_};
111        if ($ref) {        if ($ref) {
112          $result->{$_} = var_deref($obj->{$_});          $result->{$_} = var_deref($obj->{$_}, $options);
113            #undef $obj->{$_};
114        } else {        } else {
115          $result->{$_} = $obj->{$_};          #$result->{$_} = $obj->{$_};
116            $result->{$_} = deep_copy($obj->{$_});
117        }        }
118          #undef $obj->{$_} if $options->{destroy};
119          #$options->{destroy}->($obj->{$_}) if $options->{destroy};
120      }      }
121    }    }
122      #undef $obj if $options->{destroy};
123      $options->{cb_destroy}->($obj) if $options->{cb_destroy};
124    return $result;    return $result;
125  }  }
126    
127    
128    sub expand {
129    
130      my $obj = shift;
131      my $options = shift;
132      my $result;
133    
134      if ((ref $obj) eq 'ARRAY') {
135    
136        IterArray @$obj, sub {
137          my $item;
138          # if current item is a reference ...
139          if (ref $_[0]) {
140            # ... expand structure recursively
141            $item = expand($_[0], $options);
142            # destroy item via seperate callback method (a POST) if requested
143            #$options->{cb}->{destroy}->($_[0]) if $options->{destroy};
144    
145          # ... assume plain scalar
146          } else {
147            #$item = deep_copy($_[0]);
148            $item = $_[0];
149            # conversions/encodings
150            $item = scalar2utf8($item) if ($item && $options->{utf8});
151          }
152          #push(@{$result}, $item) if $item;   # use item only if not undef  (TODO: make configurable via $options)
153          push(@{$result}, $item);                 # use item in any case
154    
155        }
156    
157      # TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }"  ???
158      } else {
159    
160        IterHash %$obj, sub {
161          my $item;
162          
163          # if current item is a reference ...
164          if (ref $_[1]) {
165            # ... expand structure recursively
166            $item = expand($_[1], $options);
167            # destroy item via seperate callback method (a POST) if requested
168            #$options->{cb}->{destroy}->($_[1]) if $options->{destroy};
169          
170          # ... assume plain scalar
171          } else {
172            #$item = deep_copy($_[1]);
173            $item = $_[1];
174            # conversions/encodings
175            $item = scalar2utf8($item) if ($item && $options->{utf8});
176          }
177          #$result->{$_[0]} = $item if $item;   # use item only if not undef  (TODO: make configurable via $options)
178          $result->{$_[0]} = $item;               # use item in any case
179        }
180    
181      }
182    
183      # convert all values to utf8 (inside complex struct)
184        # now done in core-item-callbacks via Greg London's "Iterate" from CPAN
185        # var2utf8($result) if ($options->{utf8});
186    
187      # destroy persistent object from memory to be sure to get a fresh one next time
188      #undef $obj if $options->{destroy};
189      #$options->{cb_destroy}->($obj) if $options->{cb_destroy};
190      #$options->{cb}->{destroy}->($obj) if $options->{destroy};
191      
192      return $result;
193    }
194    
195    
196    
197  my @indexstack;  my @indexstack;
# Line 143  sub var_traverse_mixin_update { Line 242  sub var_traverse_mixin_update {
242  sub object2hash {  sub object2hash {
243    my $object = shift;    my $object = shift;
244    my $options = shift;    my $options = shift;
245    my $deref = var_deref($object);    #my $deref = var_deref($object);
246    var2utf8($deref) if ($options->{utf8});    my $deref = expand($object, $options);
247      #var2utf8($deref) if ($options->{utf8});
248    return $deref;    return $deref;
249  }  }
250    
# Line 170  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 197  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 (!$bool_recursion);
# Line 214  sub hash2object_traverse_mixin { Line 315  sub hash2object_traverse_mixin {
315    
316  #    print STDERR "===", "reftype: ", attributes::reftype($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 256  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 270  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 353  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;
Legend:
Removed from v.1.3  
changed lines
  Added in v.1.8
MailToCvsAdmin">MailToCvsAdmin
 ViewVC Help
Powered by ViewVC 1.1.26 RSS 2.0 feed