Mungle/Transform/Deep.pm

## ---------------------------------------------------------------------------
##  $Id: Deep.pm,v 1.11 2003/02/20 21:13:54 joko Exp $
## ---------------------------------------------------------------------------
##  $Log: Deep.pm,v $
##  Revision 1.11  2003/02/20 21:13:54  joko
##  - removed implementation of deep_copy2 - get this from the Pitonyak namespace (now cloned to repository)
##
##  Revision 1.10  2003/02/20 20:48:00  joko
##  - refactored lots of code to Data::Code::Ref
##  + alternative 'deep_copy' implementation
##
##  Revision 1.9  2003/02/18 19:35:56  joko
##  +- modified 'sub refexpr2perlref': now can get the $delimiter passed, too
##
##  Revision 1.8  2003/02/09 05:10:56  joko
##  + minor update
##
##  Revision 1.7  2003/01/19 03:26:59  joko
##  + added 'sub deep_copy'  -  refactored from libp
##  + add 'sub merge'  -  exported from CPAN's 'Hash::Merge'
##
##  Revision 1.6  2002/12/23 11:27:53  jonen
##  + changed behavior WATCH!
##
##  Revision 1.5  2002/12/16 19:57:54  joko
##  + option 'init'
##
##  Revision 1.4  2002/12/05 13:56:49  joko
##  - var_deref
##  + expand - more sophisticated dereferencing with callbacks using Iterate
##
##  Revision 1.3  2002/12/03 05:34:55  joko
##  + bugfix: now utilizing var_utf2iso from Data::Transform::Encode
##
##  Revision 1.2  2002/12/01 04:44:07  joko
##  + code from Data::Transform::OO
##
##  Revision 1.1  2002/11/29 04:49:20  joko
##  + initial check-in
##
##  Revision 1.1  2002/10/10 03:26:00  cvsjoko
##  + new
## ---------------------------------------------------------------------------


package Data::Transform::Deep;

use strict;
use warnings;

require Exporter;
our @ISA = qw( Exporter );
our @EXPORT_OK = qw(
  &expand
  &deep_copy
  &merge_to
);


use attributes;
use Data::Dumper;
use Iterate;

use Pitonyak::DeepCopy;
use Data::Transform::Encode qw( latin_to_utf8 latin_to_utf8_scalar utf8_to_latin utf8_to_latin_scalar );
use Data::Code::Ref qw( ref_slot );

sub numhash2list {
  my $vref = shift;
  #my $context = shift;
  if (ref $vref eq 'HASH') {
    foreach (keys %{$vref}) {
#      if ((ref $vref->{$_}) =~ m/HASH/) {
          if ((ref $vref->{$_}) =~ m/HASH/) {
            if ($vref->{$_}{0}) {   # might be a numerical-indexed array
              #print "000\n";
              #print "context: $context\n";
              my @arr;
              foreach my $key_numeric (sort keys %{$vref->{$_}}) {
                push @arr, $vref->{$_}{$key_numeric};
              }
              $vref->{$_} = \@arr;
            }
            numhash2list($vref->{$_});
          }
#      } else {
#        #$vref->{$_} = scalar2iso($vref->{$_});
#      }
    }
  }
}


# FIXME: could this be refactored using expand?
# btw: "expand": look at scripts@CPAN (System Administration):
# there is a perl make with perl
sub _var_deref_test {
  my $obj = shift;
  my $options = shift;
  my $result;
  if ((ref $obj) eq 'ARRAY') {
    foreach (@{$obj}) {
      my $ref = ref $_;
      if ($ref) {
        push(@{$result}, var_deref($_, $options));
        #undef $_;
      } else {
        #push(@{$result}, $_);
        push(@{$result}, deep_copy($_));
      }
      #undef $_ if $options->{destroy};
      #$options->{destroy}->($_) if $options->{destroy};
    }
  # TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }"  ???
  } else {
    foreach (keys %{$obj}) {
      my $key = $_;
      my $ref = ref $obj->{$_};
      if ($ref) {
        $result->{$_} = var_deref($obj->{$_}, $options);
        #undef $obj->{$_};
      } else {
        #$result->{$_} = $obj->{$_};
        $result->{$_} = deep_copy($obj->{$_});
      }
      #undef $obj->{$_} if $options->{destroy};
      #$options->{destroy}->($obj->{$_}) if $options->{destroy};
    }
  }
  #undef $obj if $options->{destroy};
  $options->{cb_destroy}->($obj) if $options->{cb_destroy};
  return $result;
}


sub expand {

  my $obj = shift;
  my $options = shift;
  my $result;

  #print "ref: ", ref $obj, "\n";

  if (ref $obj eq 'ARRAY') {

    IterArray @$obj, sub {
      my $item;
      # if current item is a reference ...
      if (ref $_[0]) {
        # ... expand structure recursively
        $item = expand($_[0], $options);
        # destroy item via seperate callback method (a POST) if requested
        #$options->{cb}->{destroy}->($_[0]) if $options->{destroy};

      # ... assume plain scalar
      } else {
        #$item = deep_copy($_[0]);
        $item = $_[0];
        # conversions/encodings
        $item = latin_to_utf8_scalar($item) if ($item && $options->{utf8});
        $item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin});
      }
      #push(@{$result}, $item) if $item;   # use item only if not undef  (TODO: make configurable via $options)
      push(@{$result}, $item);                 # use item in any case

    }

  } elsif (ref $obj eq 'CODE') {
    #print Dumper($obj);
    #exit;

  # TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }"  ???
  } elsif (ref $obj) {

    IterHash %$obj, sub {
      my $item;
      
      # if current item is a reference ...
      if (ref $_[1]) {
        # ... expand structure recursively
        $item = expand($_[1], $options);
        # destroy item via seperate callback method (a POST) if requested
        #$options->{cb}->{destroy}->($_[1]) if $options->{destroy};
      
      # ... assume plain scalar
      } else {
        #$item = deep_copy($_[1]);
        $item = $_[1];
        # conversions/encodings
        $item = latin_to_utf8_scalar($item) if ($item && $options->{utf8});
        $item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin});
      }
      #$result->{$_[0]} = $item if $item;   # use item only if not undef  (TODO: make configurable via $options)
      $result->{$_[0]} = $item;               # use item in any case
    }

  } else {
    #die ("not a reference!");
    $result = $obj;

  }

  # convert all values to utf8 (inside complex struct)
    # now done in core-item-callbacks via Greg London's "Iterate" from CPAN
    # var2utf8($result) if ($options->{utf8});

  # destroy persistent object from memory to be sure to get a fresh one next time
  #undef $obj if $options->{destroy};
  #$options->{cb_destroy}->($obj) if $options->{cb_destroy};
  #$options->{cb}->{destroy}->($obj) if $options->{destroy};
  
  return $result;
}


my @indexstack;
sub _var_traverse_mixin_update_old {
  my $obj = shift;
  my $data = shift;
  my $bool_recursion = shift;
  if (!$bool_recursion) {
    @indexstack = ();
  }
  my $result;

  # 'ARRAY' does not work!
  if ((ref $obj) eq 'ARRAY') {
    #print "ARRAY\n";
    my $i = 0;
    foreach (@{$obj}) {
      push @indexstack, $i;
      my $ref = ref $_;
      if ($ref) {
        #$obj->[$i] = var_mixin($_, $data, 1);
        var_traverse_mixin_update($_, $data, 1);
      } else {
        $obj->[$i] = $_;
      }
      pop @indexstack;
      $i++;
    }
  } else {
    foreach (keys %{$obj}) {
      push @indexstack, $_;
      my $ref = ref $obj->{$_};
      if ($ref) {
        #$obj->{$_} = var_mixin($obj->{$_}, $data, 1);
        var_traverse_mixin_update($obj->{$_}, $data, 1);
      } else {
        #$obj->{$_} = $obj->{$_};
        my $evstring = getSlot($data);
        $obj->{$_} = $evstring;
        
      }
      pop @indexstack;
    }
  }
  #return $result;
}

sub merge_to {
  _hash2object(@_);
  # TODO:
  # re-implement using CPAN's "Iterate".
}


# todo: maybe do diff(s) here sometimes!?
sub _hash2object {
  my $object = shift;
  my $data = shift;
  my $options = shift;

  #print "hash2object", "\n";
  
  # "patch" needed 'cause php passes numerical-indexed-arrays as hash-tables,
  # this method corrects this
  numhash2list($data) if ($options->{php});

  # utf8-conversion/-encoding (essential for I18N)
  var_utf2iso($data) if ($options->{utf8});

  # get fresh object from database
  # todo:
  #   - handle "locked" objects !!!
  #   - check if already another update occoured (object-revisioning needed!)
  #my $obj = $self->getObject($oid);

  # mix changes into fresh object and save it back
  _hash2object_traverse_mixin($object, $data, 0, $options);

  # done in core mixin function?
  #$self->{storage}->update($obj);

  # we should "undef" some objects here to destroy them in memory and enforce reloading when used next time
  # simulate:
  #$self->{storage}->disconnect();

}

# ------------------------------------
#   core mixin function
# TODO-FEATURE: make this possible in a reverse way: object is empty (no fields) and gets filled up by mixin-data

# remember keys of structures we are traversing
# this is a HACK:
#  - don't (!!!) "packageglobal" @indexstack
#  - it will lead to problems with parallelism!

#my @indexstack;

# traverse a deeply nested structure, mix in values from given hash, update underlying tangram-object
sub _hash2object_traverse_mixin {
  my $object = shift;
  my $data = shift;
  my $bool_recursion = shift;
  my $options = shift;

  # clear our key - stack if we are called from user-code (non-recursively)
  @indexstack = () if (!$bool_recursion);

  my $classname = ref $object;
#  if ($classname) {
#    print STDERR "*****************", Dumper(Class::Tangram::attribute_types($classname)), "\n";
#  }

  # parser: detected OBJECT (a Tangram one?)   (reftype == HASH) (assume)
  # what's exactly done here? hmmm.... it works ;)
  # maybe a HACK: please try not to use "IntrHash"es, maybe this cannot handle them!!!
  # extend! check!
  
  #print attributes::reftype($object), "\n";
  
  # V1
  #if ((attributes::reftype($object) eq 'HASH') && (ref($object) ne 'HASH') && (ref($object) ne 'ARRAY')) {
  # V2
  my $reftype = attributes::reftype($object);
  #print "reftype: '$reftype'", "\n";
  if ($reftype eq 'HASH') {

#    print STDERR "===", "reftype: ", attributes::reftype($obj), "\n";
        
    my @fields;
    # loop through fields of object (Tangram-object)
    @fields = keys %{$object};

    # loop through fields of to.be.injected-data (arbitrary Perl-data-structure)
    @fields = keys %{$data} if $options->{init};
#    @fields = keys %{$data} if $options->{mixin};
    
    foreach (@fields) {
      my $field = $_;
      push @indexstack, $field;
            
      # determine type of object
      my $ref = ref $object->{$field};
#      print STDERR "attrname: $_  ATTRref: $ref", "\n";
      if ($ref) {
        _hash2object_traverse_mixin($object->{$field}, $data, 1, $options);
      } else {
        my $val = ref_slot($data, \@indexstack);
        
#print Dumper($options);
        my $field_target = $field;
        if (my $pattern = $options->{pattern_strip_key}) {
          print "pattern: $pattern", "\n";
          $field_target =~ s/$pattern//;
          print "field: $field_target", "\n";
        }

        $object->{$field_target} = $val if defined $val;
      }
      pop @indexstack;
    }

    # save object to database ...
    # ... do an update if it already exists, do an insert if it doesn't
#    my $objectId = $self->{storage}->id($obj);
#    $logger->debug( __PACKAGE__ . "->saveObjectFromHash_traverse_mixin_update( object $obj objectId $objectId )" );
#    if ($objectId) {
#      $self->{storage}->update($obj);

#print __PACKAGE__ . ":", "\n";
#print Dumper($object);

#    } else {
#      $self->{storage}->insert($obj);
#    }
    
  }

#&& ( ref($obj) ne 'HASH' ) 

    # loop through entries of array (IntrArray, isn't it?)
  if ((ref $object) eq 'ARRAY') {
#    print STDERR "===", "refttype ", attributes::reftype($obj), "\n";
    my $i = 0;
    foreach (@{$object}) {
      push @indexstack, $i;
      my $ref = ref $_;
#      print STDERR "attrname: $_  ATTRref: $ref", "\n";
#      if ($ref && $_) {
      if ($ref) {
        _hash2object_traverse_mixin($_, $data, 1, $options);
      } else {
        $object->[$i] = $_ if defined $_;
      }
      pop @indexstack;
      $i++;
    }

=pod
  # object?
  } else {
    print "reference: ", ref $object, "\n";
    print "reftype: ", $reftype, "\n";
    die(__PACKAGE__ . "->_hash2object_traverse_mixin: can not handle this!");
=cut
  
  }

}


# ACK's go to Randal L. Schwartz <merlyn@stonehenge.com>
# on the website:
# This text is copyright by Miller-Freeman, Inc., and is used with their permission. 
# Further distribution or use is not permitted. 
# please visit http://www.stonehenge.com/merlyn/UnixReview/col30.html
sub deep_copy1 {
  my $this = shift;
  if (not ref $this) {
    $this;
  } elsif (ref $this eq "ARRAY") {
    [map deep_copy1($_), @$this];
  } elsif (ref $this eq "HASH") {
    +{map { $_ => deep_copy1($this->{$_}) } keys %$this};
  } elsif (ref $this eq "CODE") {
    $this;
  } else { die "deep_copy1 asks: what type is $this?" }
  #} else { print "deep_copy asks: what type is $this?", "\n"; }
}

# ACK's go to Andrew Pitonyak
# Copyright 2002, Andrew Pitonyak (perlboy@pitonyak.org)
# please visit: http://www.pitonyak.org/code/perl/Pitonyak/DeepCopy.pm.html
sub deep_copy {
  Pitonyak::DeepCopy::deep_copy(@_);
}


1;
__END__
1	joko	1.7	## ---------------------------------------------------------------------------
2	joko	1.12	## $Id: Deep.pm,v 1.11 2003/02/20 21:13:54 joko Exp $
3	joko	1.7	## ---------------------------------------------------------------------------
4	joko	1.8	## $Log: Deep.pm,v $
5	joko	1.12	## Revision 1.11 2003/02/20 21:13:54 joko
6			## - removed implementation of deep_copy2 - get this from the Pitonyak namespace (now cloned to repository)
7			##
8	joko	1.11	## Revision 1.10 2003/02/20 20:48:00 joko
9			## - refactored lots of code to Data::Code::Ref
10			## + alternative 'deep_copy' implementation
11			##
12	joko	1.10	## Revision 1.9 2003/02/18 19:35:56 joko
13			## +- modified 'sub refexpr2perlref': now can get the $delimiter passed, too
14			##
15	joko	1.9	## Revision 1.8 2003/02/09 05:10:56 joko
16			## + minor update
17			##
18	joko	1.8	## Revision 1.7 2003/01/19 03:26:59 joko
19			## + added 'sub deep_copy' - refactored from libp
20			## + add 'sub merge' - exported from CPAN's 'Hash::Merge'
21			##
22	joko	1.7	## Revision 1.6 2002/12/23 11:27:53 jonen
23			## + changed behavior WATCH!
24			##
25			## Revision 1.5 2002/12/16 19:57:54 joko
26			## + option 'init'
27			##
28			## Revision 1.4 2002/12/05 13:56:49 joko
29			## - var_deref
30			## + expand - more sophisticated dereferencing with callbacks using Iterate
31			##
32			## Revision 1.3 2002/12/03 05:34:55 joko
33			## + bugfix: now utilizing var_utf2iso from Data::Transform::Encode
34			##
35			## Revision 1.2 2002/12/01 04:44:07 joko
36			## + code from Data::Transform::OO
37			##
38			## Revision 1.1 2002/11/29 04:49:20 joko
39			## + initial check-in
40			##
41			## Revision 1.1 2002/10/10 03:26:00 cvsjoko
42			## + new
43			## ---------------------------------------------------------------------------
44	joko	1.1
45
46			package Data::Transform::Deep;
47
48			use strict;
49			use warnings;
50
51			require Exporter;
52			our @ISA = qw( Exporter );
53	joko	1.2	our @EXPORT_OK = qw(
54	joko	1.4	&expand
55	joko	1.7	&deep_copy
56	joko	1.10	&merge_to
57	joko	1.1	);
58	joko	1.10
59	joko	1.1
60			use attributes;
61	joko	1.2	use Data::Dumper;
62	joko	1.10	use Iterate;
63	joko	1.7
64	joko	1.12	use Pitonyak::DeepCopy;
65	joko	1.10	use Data::Transform::Encode qw( latin_to_utf8 latin_to_utf8_scalar utf8_to_latin utf8_to_latin_scalar );
66			use Data::Code::Ref qw( ref_slot );
67	joko	1.1
68	joko	1.10	sub numhash2list {
69	joko	1.1	my $vref = shift;
70			#my $context = shift;
71			if (ref $vref eq 'HASH') {
72			foreach (keys %{$vref}) {
73			# if ((ref $vref->{$_}) =~ m/HASH/) {
74			if ((ref $vref->{$_}) =~ m/HASH/) {
75			if ($vref->{$_}{0}) { # might be a numerical-indexed array
76			#print "000\n";
77			#print "context: $context\n";
78			my @arr;
79			foreach my $key_numeric (sort keys %{$vref->{$_}}) {
80			push @arr, $vref->{$_}{$key_numeric};
81			}
82			$vref->{$_} = \@arr;
83			}
84	joko	1.10	numhash2list($vref->{$_});
85	joko	1.1	}
86			# } else {
87			# #$vref->{$_} = scalar2iso($vref->{$_});
88			# }
89			}
90			}
91			}
92
93
94	joko	1.9	# FIXME: could this be refactored using expand?
95			# btw: "expand": look at scripts@CPAN (System Administration):
96			# there is a perl make with perl
97	joko	1.10	sub _var_deref_test {
98	joko	1.1	my $obj = shift;
99	joko	1.4	my $options = shift;
100	joko	1.1	my $result;
101			if ((ref $obj) eq 'ARRAY') {
102			foreach (@{$obj}) {
103			my $ref = ref $_;
104			if ($ref) {
105	joko	1.4	push(@{$result}, var_deref($_, $options));
106			#undef $_;
107	joko	1.1	} else {
108	joko	1.4	#push(@{$result}, $_);
109			push(@{$result}, deep_copy($_));
110	joko	1.1	}
111	joko	1.4	#undef $_ if $options->{destroy};
112			#$options->{destroy}->($_) if $options->{destroy};
113	joko	1.1	}
114	joko	1.2	# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ???
115	joko	1.1	} else {
116			foreach (keys %{$obj}) {
117			my $key = $_;
118			my $ref = ref $obj->{$_};
119			if ($ref) {
120	joko	1.4	$result->{$_} = var_deref($obj->{$_}, $options);
121			#undef $obj->{$_};
122	joko	1.1	} else {
123	joko	1.4	#$result->{$_} = $obj->{$_};
124			$result->{$_} = deep_copy($obj->{$_});
125	joko	1.1	}
126	joko	1.4	#undef $obj->{$_} if $options->{destroy};
127			#$options->{destroy}->($obj->{$_}) if $options->{destroy};
128	joko	1.1	}
129			}
130	joko	1.4	#undef $obj if $options->{destroy};
131			$options->{cb_destroy}->($obj) if $options->{cb_destroy};
132	joko	1.1	return $result;
133			}
134
135
136	joko	1.4	sub expand {
137
138			my $obj = shift;
139			my $options = shift;
140			my $result;
141
142	joko	1.10	#print "ref: ", ref $obj, "\n";
143
144			if (ref $obj eq 'ARRAY') {
145	joko	1.4
146			IterArray @$obj, sub {
147			my $item;
148			# if current item is a reference ...
149			if (ref $_[0]) {
150			# ... expand structure recursively
151			$item = expand($_[0], $options);
152			# destroy item via seperate callback method (a POST) if requested
153			#$options->{cb}->{destroy}->($_[0]) if $options->{destroy};
154
155			# ... assume plain scalar
156			} else {
157			#$item = deep_copy($_[0]);
158			$item = $_[0];
159			# conversions/encodings
160	joko	1.10	$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8});
161			$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin});
162	joko	1.4	}
163			#push(@{$result}, $item) if $item; # use item only if not undef (TODO: make configurable via $options)
164			push(@{$result}, $item); # use item in any case
165
166			}
167
168	joko	1.10	} elsif (ref $obj eq 'CODE') {
169			#print Dumper($obj);
170			#exit;
171
172	joko	1.4	# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ???
173	joko	1.10	} elsif (ref $obj) {
174	joko	1.4
175			IterHash %$obj, sub {
176			my $item;
177
178			# if current item is a reference ...
179			if (ref $_[1]) {
180			# ... expand structure recursively
181			$item = expand($_[1], $options);
182			# destroy item via seperate callback method (a POST) if requested
183			#$options->{cb}->{destroy}->($_[1]) if $options->{destroy};
184
185			# ... assume plain scalar
186			} else {
187			#$item = deep_copy($_[1]);
188			$item = $_[1];
189			# conversions/encodings
190	joko	1.10	$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8});
191			$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin});
192	joko	1.4	}
193			#$result->{$_[0]} = $item if $item; # use item only if not undef (TODO: make configurable via $options)
194			$result->{$_[0]} = $item; # use item in any case
195			}
196
197	joko	1.10	} else {
198			#die ("not a reference!");
199			$result = $obj;
200
201	joko	1.4	}
202
203			# convert all values to utf8 (inside complex struct)
204			# now done in core-item-callbacks via Greg London's "Iterate" from CPAN
205			# var2utf8($result) if ($options->{utf8});
206
207			# destroy persistent object from memory to be sure to get a fresh one next time
208			#undef $obj if $options->{destroy};
209			#$options->{cb_destroy}->($obj) if $options->{cb_destroy};
210			#$options->{cb}->{destroy}->($obj) if $options->{destroy};
211
212			return $result;
213			}
214
215	joko	1.1
216
217			my @indexstack;
218	joko	1.10	sub _var_traverse_mixin_update_old {
219	joko	1.1	my $obj = shift;
220			my $data = shift;
221			my $bool_recursion = shift;
222			if (!$bool_recursion) {
223			@indexstack = ();
224			}
225			my $result;
226
227			# 'ARRAY' does not work!
228			if ((ref $obj) eq 'ARRAY') {
229			#print "ARRAY\n";
230			my $i = 0;
231			foreach (@{$obj}) {
232			push @indexstack, $i;
233			my $ref = ref $_;
234			if ($ref) {
235			#$obj->[$i] = var_mixin($_, $data, 1);
236			var_traverse_mixin_update($_, $data, 1);
237			} else {
238			$obj->[$i] = $_;
239			}
240			pop @indexstack;
241			$i++;
242			}
243			} else {
244			foreach (keys %{$obj}) {
245			push @indexstack, $_;
246			my $ref = ref $obj->{$_};
247			if ($ref) {
248			#$obj->{$_} = var_mixin($obj->{$_}, $data, 1);
249			var_traverse_mixin_update($obj->{$_}, $data, 1);
250			} else {
251			#$obj->{$_} = $obj->{$_};
252			my $evstring = getSlot($data);
253			$obj->{$_} = $evstring;
254
255			}
256			pop @indexstack;
257			}
258			}
259			#return $result;
260			}
261
262	joko	1.10	sub merge_to {
263			_hash2object(@_);
264			# TODO:
265			# re-implement using CPAN's "Iterate".
266	joko	1.2	}
267
268	joko	1.10
269	joko	1.2	# todo: maybe do diff(s) here sometimes!?
270	joko	1.10	sub _hash2object {
271	joko	1.2	my $object = shift;
272			my $data = shift;
273			my $options = shift;
274
275	joko	1.3	#print "hash2object", "\n";
276
277	joko	1.2	# "patch" needed 'cause php passes numerical-indexed-arrays as hash-tables,
278			# this method corrects this
279	joko	1.10	numhash2list($data) if ($options->{php});
280	joko	1.2
281			# utf8-conversion/-encoding (essential for I18N)
282			var_utf2iso($data) if ($options->{utf8});
283
284			# get fresh object from database
285			# todo:
286			# - handle "locked" objects !!!
287			# - check if already another update occoured (object-revisioning needed!)
288			#my $obj = $self->getObject($oid);
289
290			# mix changes into fresh object and save it back
291	joko	1.10	_hash2object_traverse_mixin($object, $data, 0, $options);
292	joko	1.2
293			# done in core mixin function?
294			#$self->{storage}->update($obj);
295
296			# we should "undef" some objects here to destroy them in memory and enforce reloading when used next time
297			# simulate:
298			#$self->{storage}->disconnect();
299
300			}
301
302			# ------------------------------------
303			# core mixin function
304			# TODO-FEATURE: make this possible in a reverse way: object is empty (no fields) and gets filled up by mixin-data
305
306			# remember keys of structures we are traversing
307			# this is a HACK:
308			# - don't (!!!) "packageglobal" @indexstack
309			# - it will lead to problems with parallelism!
310
311			#my @indexstack;
312
313			# traverse a deeply nested structure, mix in values from given hash, update underlying tangram-object
314	joko	1.10	sub _hash2object_traverse_mixin {
315	joko	1.2	my $object = shift;
316			my $data = shift;
317			my $bool_recursion = shift;
318	joko	1.5	my $options = shift;
319	joko	1.2
320			# clear our key - stack if we are called from user-code (non-recursively)
321			@indexstack = () if (!$bool_recursion);
322
323			my $classname = ref $object;
324			# if ($classname) {
325			# print STDERR "*****************", Dumper(Class::Tangram::attribute_types($classname)), "\n";
326			# }
327
328			# parser: detected OBJECT (a Tangram one?) (reftype == HASH) (assume)
329			# what's exactly done here? hmmm.... it works ;)
330			# maybe a HACK: please try not to use "IntrHash"es, maybe this cannot handle them!!!
331			# extend! check!
332	joko	1.10
333			#print attributes::reftype($object), "\n";
334
335			# V1
336			#if ((attributes::reftype($object) eq 'HASH') && (ref($object) ne 'HASH') && (ref($object) ne 'ARRAY')) {
337			# V2
338			my $reftype = attributes::reftype($object);
339			#print "reftype: '$reftype'", "\n";
340			if ($reftype eq 'HASH') {
341	joko	1.2
342			# print STDERR "===", "reftype: ", attributes::reftype($obj), "\n";
343
344	joko	1.5	my @fields;
345	joko	1.2	# loop through fields of object (Tangram-object)
346	joko	1.5	@fields = keys %{$object};
347
348			# loop through fields of to.be.injected-data (arbitrary Perl-data-structure)
349			@fields = keys %{$data} if $options->{init};
350	jonen	1.6	# @fields = keys %{$data} if $options->{mixin};
351	joko	1.5
352			foreach (@fields) {
353	joko	1.7	my $field = $_;
354			push @indexstack, $field;
355	joko	1.2
356			# determine type of object
357	joko	1.7	my $ref = ref $object->{$field};
358	joko	1.2	# print STDERR "attrname: $_ ATTRref: $ref", "\n";
359			if ($ref) {
360	joko	1.10	_hash2object_traverse_mixin($object->{$field}, $data, 1, $options);
361	joko	1.2	} else {
362	joko	1.10	my $val = ref_slot($data, \@indexstack);
363	joko	1.7
364	joko	1.8	#print Dumper($options);
365	joko	1.7	my $field_target = $field;
366			if (my $pattern = $options->{pattern_strip_key}) {
367			print "pattern: $pattern", "\n";
368			$field_target =~ s/$pattern//;
369			print "field: $field_target", "\n";
370			}
371
372			$object->{$field_target} = $val if defined $val;
373	joko	1.2	}
374			pop @indexstack;
375			}
376
377			# save object to database ...
378			# ... do an update if it already exists, do an insert if it doesn't
379			# my $objectId = $self->{storage}->id($obj);
380			# $logger->debug( __PACKAGE__ . "->saveObjectFromHash_traverse_mixin_update( object $obj objectId $objectId )" );
381			# if ($objectId) {
382			# $self->{storage}->update($obj);
383
384			#print __PACKAGE__ . ":", "\n";
385			#print Dumper($object);
386
387			# } else {
388			# $self->{storage}->insert($obj);
389			# }
390
391			}
392
393			#&& ( ref($obj) ne 'HASH' )
394
395			# loop through entries of array (IntrArray, isn't it?)
396			if ((ref $object) eq 'ARRAY') {
397			# print STDERR "===", "refttype ", attributes::reftype($obj), "\n";
398			my $i = 0;
399			foreach (@{$object}) {
400			push @indexstack, $i;
401			my $ref = ref $_;
402			# print STDERR "attrname: $_ ATTRref: $ref", "\n";
403	jonen	1.6	# if ($ref && $_) {
404			if ($ref) {
405	joko	1.10	_hash2object_traverse_mixin($_, $data, 1, $options);
406	joko	1.2	} else {
407	jonen	1.6	$object->[$i] = $_ if defined $_;
408	joko	1.2	}
409			pop @indexstack;
410			$i++;
411			}
412	joko	1.10
413			=pod
414			# object?
415			} else {
416			print "reference: ", ref $object, "\n";
417			print "reftype: ", $reftype, "\n";
418			die(__PACKAGE__ . "->_hash2object_traverse_mixin: can not handle this!");
419			=cut
420
421	joko	1.2	}
422
423			}
424
425
426	joko	1.10	# ACK's go to Randal L. Schwartz <merlyn@stonehenge.com>
427			# on the website:
428			# This text is copyright by Miller-Freeman, Inc., and is used with their permission.
429			# Further distribution or use is not permitted.
430			# please visit http://www.stonehenge.com/merlyn/UnixReview/col30.html
431			sub deep_copy1 {
432			my $this = shift;
433			if (not ref $this) {
434			$this;
435			} elsif (ref $this eq "ARRAY") {
436			[map deep_copy1($_), @$this];
437			} elsif (ref $this eq "HASH") {
438			+{map { $_ => deep_copy1($this->{$_}) } keys %$this};
439			} elsif (ref $this eq "CODE") {
440			$this;
441			} else { die "deep_copy1 asks: what type is $this?" }
442			#} else { print "deep_copy asks: what type is $this?", "\n"; }
443	joko	1.2	}
444
445	joko	1.10	# ACK's go to Andrew Pitonyak
446			# Copyright 2002, Andrew Pitonyak (perlboy@pitonyak.org)
447			# please visit: http://www.pitonyak.org/code/perl/Pitonyak/DeepCopy.pm.html
448	joko	1.7	sub deep_copy {
449	joko	1.12	Pitonyak::DeepCopy::deep_copy(@_);
450	joko	1.1	}
451	joko	1.12
452	joko	1.1
453			1;
454	joko	1.10	__END__
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