Mungle/Transform/Deep.pm

## ---------------------------------------------------------------------------
##  $Id: Deep.pm,v 1.12 2003/02/20 22:45:19 joko Exp $
## ---------------------------------------------------------------------------
##  $Log: Deep.pm,v $
##  Revision 1.12  2003/02/20 22:45:19  joko
##  fix regarding new deep_copy
##
##  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;
}


# convert values in hash to utf8 (and back) to be ready for (e.g.) encapsulation in XML
# but still using the known latin locale stuff
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
    # latin_to_utf8($result) if ($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	1.13	## $Id: Deep.pm,v 1.12 2003/02/20 22:45:19 joko Exp $
3	joko	1.7	## ---------------------------------------------------------------------------
4	joko	1.8	## $Log: Deep.pm,v $
5	joko	1.13	## Revision 1.12 2003/02/20 22:45:19 joko
6			## fix regarding new deep_copy
7			##
8	joko	1.12	## Revision 1.11 2003/02/20 21:13:54 joko
9			## - removed implementation of deep_copy2 - get this from the Pitonyak namespace (now cloned to repository)
10			##
11	joko	1.11	## Revision 1.10 2003/02/20 20:48:00 joko
12			## - refactored lots of code to Data::Code::Ref
13			## + alternative 'deep_copy' implementation
14			##
15	joko	1.10	## Revision 1.9 2003/02/18 19:35:56 joko
16			## +- modified 'sub refexpr2perlref': now can get the $delimiter passed, too
17			##
18	joko	1.9	## Revision 1.8 2003/02/09 05:10:56 joko
19			## + minor update
20			##
21	joko	1.8	## Revision 1.7 2003/01/19 03:26:59 joko
22			## + added 'sub deep_copy' - refactored from libp
23			## + add 'sub merge' - exported from CPAN's 'Hash::Merge'
24			##
25	joko	1.7	## Revision 1.6 2002/12/23 11:27:53 jonen
26			## + changed behavior WATCH!
27			##
28			## Revision 1.5 2002/12/16 19:57:54 joko
29			## + option 'init'
30			##
31			## Revision 1.4 2002/12/05 13:56:49 joko
32			## - var_deref
33			## + expand - more sophisticated dereferencing with callbacks using Iterate
34			##
35			## Revision 1.3 2002/12/03 05:34:55 joko
36			## + bugfix: now utilizing var_utf2iso from Data::Transform::Encode
37			##
38			## Revision 1.2 2002/12/01 04:44:07 joko
39			## + code from Data::Transform::OO
40			##
41			## Revision 1.1 2002/11/29 04:49:20 joko
42			## + initial check-in
43			##
44			## Revision 1.1 2002/10/10 03:26:00 cvsjoko
45			## + new
46			## ---------------------------------------------------------------------------
47	joko	1.1
48
49			package Data::Transform::Deep;
50
51			use strict;
52			use warnings;
53
54			require Exporter;
55			our @ISA = qw( Exporter );
56	joko	1.2	our @EXPORT_OK = qw(
57	joko	1.4	&expand
58	joko	1.7	&deep_copy
59	joko	1.10	&merge_to
60	joko	1.1	);
61	joko	1.10
62	joko	1.1
63			use attributes;
64	joko	1.2	use Data::Dumper;
65	joko	1.10	use Iterate;
66	joko	1.7
67	joko	1.12	use Pitonyak::DeepCopy;
68	joko	1.10	use Data::Transform::Encode qw( latin_to_utf8 latin_to_utf8_scalar utf8_to_latin utf8_to_latin_scalar );
69			use Data::Code::Ref qw( ref_slot );
70	joko	1.1
71	joko	1.10	sub numhash2list {
72	joko	1.1	my $vref = shift;
73			#my $context = shift;
74			if (ref $vref eq 'HASH') {
75			foreach (keys %{$vref}) {
76			# if ((ref $vref->{$_}) =~ m/HASH/) {
77			if ((ref $vref->{$_}) =~ m/HASH/) {
78			if ($vref->{$_}{0}) { # might be a numerical-indexed array
79			#print "000\n";
80			#print "context: $context\n";
81			my @arr;
82			foreach my $key_numeric (sort keys %{$vref->{$_}}) {
83			push @arr, $vref->{$_}{$key_numeric};
84			}
85			$vref->{$_} = \@arr;
86			}
87	joko	1.10	numhash2list($vref->{$_});
88	joko	1.1	}
89			# } else {
90			# #$vref->{$_} = scalar2iso($vref->{$_});
91			# }
92			}
93			}
94			}
95
96
97	joko	1.9	# FIXME: could this be refactored using expand?
98			# btw: "expand": look at scripts@CPAN (System Administration):
99			# there is a perl make with perl
100	joko	1.10	sub _var_deref_test {
101	joko	1.1	my $obj = shift;
102	joko	1.4	my $options = shift;
103	joko	1.1	my $result;
104			if ((ref $obj) eq 'ARRAY') {
105			foreach (@{$obj}) {
106			my $ref = ref $_;
107			if ($ref) {
108	joko	1.4	push(@{$result}, var_deref($_, $options));
109			#undef $_;
110	joko	1.1	} else {
111	joko	1.4	#push(@{$result}, $_);
112			push(@{$result}, deep_copy($_));
113	joko	1.1	}
114	joko	1.4	#undef $_ if $options->{destroy};
115			#$options->{destroy}->($_) if $options->{destroy};
116	joko	1.1	}
117	joko	1.2	# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ???
118	joko	1.1	} else {
119			foreach (keys %{$obj}) {
120			my $key = $_;
121			my $ref = ref $obj->{$_};
122			if ($ref) {
123	joko	1.4	$result->{$_} = var_deref($obj->{$_}, $options);
124			#undef $obj->{$_};
125	joko	1.1	} else {
126	joko	1.4	#$result->{$_} = $obj->{$_};
127			$result->{$_} = deep_copy($obj->{$_});
128	joko	1.1	}
129	joko	1.4	#undef $obj->{$_} if $options->{destroy};
130			#$options->{destroy}->($obj->{$_}) if $options->{destroy};
131	joko	1.1	}
132			}
133	joko	1.4	#undef $obj if $options->{destroy};
134			$options->{cb_destroy}->($obj) if $options->{cb_destroy};
135	joko	1.1	return $result;
136			}
137
138
139	joko	1.13	# convert values in hash to utf8 (and back) to be ready for (e.g.) encapsulation in XML
140			# but still using the known latin locale stuff
141	joko	1.4	sub expand {
142
143			my $obj = shift;
144			my $options = shift;
145			my $result;
146
147	joko	1.10	#print "ref: ", ref $obj, "\n";
148
149			if (ref $obj eq 'ARRAY') {
150	joko	1.4
151			IterArray @$obj, sub {
152			my $item;
153			# if current item is a reference ...
154			if (ref $_[0]) {
155			# ... expand structure recursively
156			$item = expand($_[0], $options);
157			# destroy item via seperate callback method (a POST) if requested
158			#$options->{cb}->{destroy}->($_[0]) if $options->{destroy};
159
160			# ... assume plain scalar
161			} else {
162			#$item = deep_copy($_[0]);
163			$item = $_[0];
164			# conversions/encodings
165	joko	1.10	$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8});
166			$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin});
167	joko	1.4	}
168			#push(@{$result}, $item) if $item; # use item only if not undef (TODO: make configurable via $options)
169			push(@{$result}, $item); # use item in any case
170
171			}
172
173	joko	1.10	} elsif (ref $obj eq 'CODE') {
174			#print Dumper($obj);
175			#exit;
176
177	joko	1.4	# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ???
178	joko	1.10	} elsif (ref $obj) {
179	joko	1.4
180			IterHash %$obj, sub {
181			my $item;
182
183			# if current item is a reference ...
184			if (ref $_[1]) {
185			# ... expand structure recursively
186			$item = expand($_[1], $options);
187			# destroy item via seperate callback method (a POST) if requested
188			#$options->{cb}->{destroy}->($_[1]) if $options->{destroy};
189
190			# ... assume plain scalar
191			} else {
192			#$item = deep_copy($_[1]);
193			$item = $_[1];
194			# conversions/encodings
195	joko	1.10	$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8});
196			$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin});
197	joko	1.4	}
198			#$result->{$_[0]} = $item if $item; # use item only if not undef (TODO: make configurable via $options)
199			$result->{$_[0]} = $item; # use item in any case
200			}
201
202	joko	1.10	} else {
203			#die ("not a reference!");
204			$result = $obj;
205
206	joko	1.4	}
207
208			# convert all values to utf8 (inside complex struct)
209			# now done in core-item-callbacks via Greg London's "Iterate" from CPAN
210	joko	1.13	# latin_to_utf8($result) if ($options->{utf8});
211	joko	1.4
212			# destroy persistent object from memory to be sure to get a fresh one next time
213			#undef $obj if $options->{destroy};
214			#$options->{cb_destroy}->($obj) if $options->{cb_destroy};
215			#$options->{cb}->{destroy}->($obj) if $options->{destroy};
216
217			return $result;
218			}
219
220	joko	1.1
221
222			my @indexstack;
223	joko	1.10	sub _var_traverse_mixin_update_old {
224	joko	1.1	my $obj = shift;
225			my $data = shift;
226			my $bool_recursion = shift;
227			if (!$bool_recursion) {
228			@indexstack = ();
229			}
230			my $result;
231
232			# 'ARRAY' does not work!
233			if ((ref $obj) eq 'ARRAY') {
234			#print "ARRAY\n";
235			my $i = 0;
236			foreach (@{$obj}) {
237			push @indexstack, $i;
238			my $ref = ref $_;
239			if ($ref) {
240			#$obj->[$i] = var_mixin($_, $data, 1);
241			var_traverse_mixin_update($_, $data, 1);
242			} else {
243			$obj->[$i] = $_;
244			}
245			pop @indexstack;
246			$i++;
247			}
248			} else {
249			foreach (keys %{$obj}) {
250			push @indexstack, $_;
251			my $ref = ref $obj->{$_};
252			if ($ref) {
253			#$obj->{$_} = var_mixin($obj->{$_}, $data, 1);
254			var_traverse_mixin_update($obj->{$_}, $data, 1);
255			} else {
256			#$obj->{$_} = $obj->{$_};
257			my $evstring = getSlot($data);
258			$obj->{$_} = $evstring;
259
260			}
261			pop @indexstack;
262			}
263			}
264			#return $result;
265			}
266
267	joko	1.10	sub merge_to {
268			_hash2object(@_);
269			# TODO:
270			# re-implement using CPAN's "Iterate".
271	joko	1.2	}
272
273	joko	1.10
274	joko	1.2	# todo: maybe do diff(s) here sometimes!?
275	joko	1.10	sub _hash2object {
276	joko	1.2	my $object = shift;
277			my $data = shift;
278			my $options = shift;
279
280	joko	1.3	#print "hash2object", "\n";
281
282	joko	1.2	# "patch" needed 'cause php passes numerical-indexed-arrays as hash-tables,
283			# this method corrects this
284	joko	1.10	numhash2list($data) if ($options->{php});
285	joko	1.2
286			# utf8-conversion/-encoding (essential for I18N)
287			var_utf2iso($data) if ($options->{utf8});
288
289			# get fresh object from database
290			# todo:
291			# - handle "locked" objects !!!
292			# - check if already another update occoured (object-revisioning needed!)
293			#my $obj = $self->getObject($oid);
294
295			# mix changes into fresh object and save it back
296	joko	1.10	_hash2object_traverse_mixin($object, $data, 0, $options);
297	joko	1.2
298			# done in core mixin function?
299			#$self->{storage}->update($obj);
300
301			# we should "undef" some objects here to destroy them in memory and enforce reloading when used next time
302			# simulate:
303			#$self->{storage}->disconnect();
304
305			}
306
307			# ------------------------------------
308			# core mixin function
309			# TODO-FEATURE: make this possible in a reverse way: object is empty (no fields) and gets filled up by mixin-data
310
311			# remember keys of structures we are traversing
312			# this is a HACK:
313			# - don't (!!!) "packageglobal" @indexstack
314			# - it will lead to problems with parallelism!
315
316			#my @indexstack;
317
318			# traverse a deeply nested structure, mix in values from given hash, update underlying tangram-object
319	joko	1.10	sub _hash2object_traverse_mixin {
320	joko	1.2	my $object = shift;
321			my $data = shift;
322			my $bool_recursion = shift;
323	joko	1.5	my $options = shift;
324	joko	1.2
325			# clear our key - stack if we are called from user-code (non-recursively)
326			@indexstack = () if (!$bool_recursion);
327
328			my $classname = ref $object;
329			# if ($classname) {
330			# print STDERR "*****************", Dumper(Class::Tangram::attribute_types($classname)), "\n";
331			# }
332
333			# parser: detected OBJECT (a Tangram one?) (reftype == HASH) (assume)
334			# what's exactly done here? hmmm.... it works ;)
335			# maybe a HACK: please try not to use "IntrHash"es, maybe this cannot handle them!!!
336			# extend! check!
337	joko	1.10
338			#print attributes::reftype($object), "\n";
339
340			# V1
341			#if ((attributes::reftype($object) eq 'HASH') && (ref($object) ne 'HASH') && (ref($object) ne 'ARRAY')) {
342			# V2
343			my $reftype = attributes::reftype($object);
344			#print "reftype: '$reftype'", "\n";
345			if ($reftype eq 'HASH') {
346	joko	1.2
347			# print STDERR "===", "reftype: ", attributes::reftype($obj), "\n";
348
349	joko	1.5	my @fields;
350	joko	1.2	# loop through fields of object (Tangram-object)
351	joko	1.5	@fields = keys %{$object};
352
353			# loop through fields of to.be.injected-data (arbitrary Perl-data-structure)
354			@fields = keys %{$data} if $options->{init};
355	jonen	1.6	# @fields = keys %{$data} if $options->{mixin};
356	joko	1.5
357			foreach (@fields) {
358	joko	1.7	my $field = $_;
359			push @indexstack, $field;
360	joko	1.2
361			# determine type of object
362	joko	1.7	my $ref = ref $object->{$field};
363	joko	1.2	# print STDERR "attrname: $_ ATTRref: $ref", "\n";
364			if ($ref) {
365	joko	1.10	_hash2object_traverse_mixin($object->{$field}, $data, 1, $options);
366	joko	1.2	} else {
367	joko	1.10	my $val = ref_slot($data, \@indexstack);
368	joko	1.7
369	joko	1.8	#print Dumper($options);
370	joko	1.7	my $field_target = $field;
371			if (my $pattern = $options->{pattern_strip_key}) {
372			print "pattern: $pattern", "\n";
373			$field_target =~ s/$pattern//;
374			print "field: $field_target", "\n";
375			}
376
377			$object->{$field_target} = $val if defined $val;
378	joko	1.2	}
379			pop @indexstack;
380			}
381
382			# save object to database ...
383			# ... do an update if it already exists, do an insert if it doesn't
384			# my $objectId = $self->{storage}->id($obj);
385			# $logger->debug( __PACKAGE__ . "->saveObjectFromHash_traverse_mixin_update( object $obj objectId $objectId )" );
386			# if ($objectId) {
387			# $self->{storage}->update($obj);
388
389			#print __PACKAGE__ . ":", "\n";
390			#print Dumper($object);
391
392			# } else {
393			# $self->{storage}->insert($obj);
394			# }
395
396			}
397
398			#&& ( ref($obj) ne 'HASH' )
399
400			# loop through entries of array (IntrArray, isn't it?)
401			if ((ref $object) eq 'ARRAY') {
402			# print STDERR "===", "refttype ", attributes::reftype($obj), "\n";
403			my $i = 0;
404			foreach (@{$object}) {
405			push @indexstack, $i;
406			my $ref = ref $_;
407			# print STDERR "attrname: $_ ATTRref: $ref", "\n";
408	jonen	1.6	# if ($ref && $_) {
409			if ($ref) {
410	joko	1.10	_hash2object_traverse_mixin($_, $data, 1, $options);
411	joko	1.2	} else {
412	jonen	1.6	$object->[$i] = $_ if defined $_;
413	joko	1.2	}
414			pop @indexstack;
415			$i++;
416			}
417	joko	1.10
418			=pod
419			# object?
420			} else {
421			print "reference: ", ref $object, "\n";
422			print "reftype: ", $reftype, "\n";
423			die(__PACKAGE__ . "->_hash2object_traverse_mixin: can not handle this!");
424			=cut
425
426	joko	1.2	}
427
428			}
429
430
431	joko	1.10	# ACK's go to Randal L. Schwartz <merlyn@stonehenge.com>
432			# on the website:
433			# This text is copyright by Miller-Freeman, Inc., and is used with their permission.
434			# Further distribution or use is not permitted.
435			# please visit http://www.stonehenge.com/merlyn/UnixReview/col30.html
436			sub deep_copy1 {
437			my $this = shift;
438			if (not ref $this) {
439			$this;
440			} elsif (ref $this eq "ARRAY") {
441			[map deep_copy1($_), @$this];
442			} elsif (ref $this eq "HASH") {
443			+{map { $_ => deep_copy1($this->{$_}) } keys %$this};
444			} elsif (ref $this eq "CODE") {
445			$this;
446			} else { die "deep_copy1 asks: what type is $this?" }
447			#} else { print "deep_copy asks: what type is $this?", "\n"; }
448	joko	1.2	}
449
450	joko	1.10	# ACK's go to Andrew Pitonyak
451			# Copyright 2002, Andrew Pitonyak (perlboy@pitonyak.org)
452			# please visit: http://www.pitonyak.org/code/perl/Pitonyak/DeepCopy.pm.html
453	joko	1.7	sub deep_copy {
454	joko	1.12	Pitonyak::DeepCopy::deep_copy(@_);
455	joko	1.1	}
456	joko	1.12
457	joko	1.1
458			1;
459	joko	1.10	__END__
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