Mungle/Transform/Deep.pm

## ---------------------------------------------------------------------------
##  $Id: Deep.pm,v 1.15 2003/02/27 14:39:48 jonen Exp $
## ---------------------------------------------------------------------------
##  $Log: Deep.pm,v $
##  Revision 1.15  2003/02/27 14:39:48  jonen
##  + fixed bug at _hash2object()
##
##  Revision 1.14  2003/02/22 17:13:55  jonen
##  + added function 'childObject2string()' to encode 'child'-references to option related string
##  + use new option at 'expand()' for replacing 'childObject2string'
##
##  Revision 1.13  2003/02/21 01:48:50  joko
##  renamed core function
##
##  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]) {
        $item = $_[0];
        # if $options->{childObj2string} is TRUE or STRING don't expand referenced object,
        # instead replace it by per option choosed string (default: o_<classname>_<ref type>_<guid> ) 
        if ($item && $options->{childObj2string}) {
          $item = childObj2string($item, $options->{childObj2string});
        } else {
          # ... 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]) {
        $item = $_[1];
        # if $options->{childObj2string} is TRUE or STRING don't expand referenced object,
        # instead replace it by per option choosed string (default: o_<classname>_<ref type>_<guid> ) 
        if ($item && $options->{childObj2string} && !(ref $_[1] eq "ARRAY") && !(ref $_[1] eq "HASH")) {
          $item = childObj2string($item, $options->{childObj2string});
        } else {
          # ... 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" and/or a modified Hash::Merge.
}


# 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)
  utf8_to_latin($data) if ($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(@_);
}


sub childObj2string {
  my $obj = shift;
  my $option = shift; 
  my $classname = ref $obj;
  
  if($option == 1) {
    my $string = "o_" . $classname . "_" .$obj->{guid};
    return $string;
  }  
}


1;
__END__
1	joko	1.7	## ---------------------------------------------------------------------------
2	joko	1.16	## $Id: Deep.pm,v 1.15 2003/02/27 14:39:48 jonen Exp $
3	joko	1.7	## ---------------------------------------------------------------------------
4	joko	1.8	## $Log: Deep.pm,v $
5	joko	1.16	## Revision 1.15 2003/02/27 14:39:48 jonen
6			## + fixed bug at _hash2object()
7			##
8	jonen	1.15	## Revision 1.14 2003/02/22 17:13:55 jonen
9			## + added function 'childObject2string()' to encode 'child'-references to option related string
10			## + use new option at 'expand()' for replacing 'childObject2string'
11			##
12	jonen	1.14	## Revision 1.13 2003/02/21 01:48:50 joko
13			## renamed core function
14			##
15	joko	1.13	## Revision 1.12 2003/02/20 22:45:19 joko
16			## fix regarding new deep_copy
17			##
18	joko	1.12	## Revision 1.11 2003/02/20 21:13:54 joko
19			## - removed implementation of deep_copy2 - get this from the Pitonyak namespace (now cloned to repository)
20			##
21	joko	1.11	## Revision 1.10 2003/02/20 20:48:00 joko
22			## - refactored lots of code to Data::Code::Ref
23			## + alternative 'deep_copy' implementation
24			##
25	joko	1.10	## Revision 1.9 2003/02/18 19:35:56 joko
26			## +- modified 'sub refexpr2perlref': now can get the $delimiter passed, too
27			##
28	joko	1.9	## Revision 1.8 2003/02/09 05:10:56 joko
29			## + minor update
30			##
31	joko	1.8	## Revision 1.7 2003/01/19 03:26:59 joko
32			## + added 'sub deep_copy' - refactored from libp
33			## + add 'sub merge' - exported from CPAN's 'Hash::Merge'
34			##
35	joko	1.7	## Revision 1.6 2002/12/23 11:27:53 jonen
36			## + changed behavior WATCH!
37			##
38			## Revision 1.5 2002/12/16 19:57:54 joko
39			## + option 'init'
40			##
41			## Revision 1.4 2002/12/05 13:56:49 joko
42			## - var_deref
43			## + expand - more sophisticated dereferencing with callbacks using Iterate
44			##
45			## Revision 1.3 2002/12/03 05:34:55 joko
46			## + bugfix: now utilizing var_utf2iso from Data::Transform::Encode
47			##
48			## Revision 1.2 2002/12/01 04:44:07 joko
49			## + code from Data::Transform::OO
50			##
51			## Revision 1.1 2002/11/29 04:49:20 joko
52			## + initial check-in
53			##
54			## Revision 1.1 2002/10/10 03:26:00 cvsjoko
55			## + new
56			## ---------------------------------------------------------------------------
57	joko	1.1
58
59			package Data::Transform::Deep;
60
61			use strict;
62			use warnings;
63
64			require Exporter;
65			our @ISA = qw( Exporter );
66	joko	1.2	our @EXPORT_OK = qw(
67	joko	1.4	&expand
68	joko	1.7	&deep_copy
69	joko	1.10	&merge_to
70	joko	1.1	);
71	joko	1.10
72	joko	1.1
73			use attributes;
74	joko	1.2	use Data::Dumper;
75	joko	1.10	use Iterate;
76	joko	1.7
77	joko	1.12	use Pitonyak::DeepCopy;
78	joko	1.10	use Data::Transform::Encode qw( latin_to_utf8 latin_to_utf8_scalar utf8_to_latin utf8_to_latin_scalar );
79			use Data::Code::Ref qw( ref_slot );
80	joko	1.1
81	joko	1.10	sub numhash2list {
82	joko	1.1	my $vref = shift;
83			#my $context = shift;
84			if (ref $vref eq 'HASH') {
85			foreach (keys %{$vref}) {
86			# if ((ref $vref->{$_}) =~ m/HASH/) {
87			if ((ref $vref->{$_}) =~ m/HASH/) {
88			if ($vref->{$_}{0}) { # might be a numerical-indexed array
89			#print "000\n";
90			#print "context: $context\n";
91			my @arr;
92			foreach my $key_numeric (sort keys %{$vref->{$_}}) {
93			push @arr, $vref->{$_}{$key_numeric};
94			}
95			$vref->{$_} = \@arr;
96			}
97	joko	1.10	numhash2list($vref->{$_});
98	joko	1.1	}
99			# } else {
100			# #$vref->{$_} = scalar2iso($vref->{$_});
101			# }
102			}
103			}
104			}
105
106
107	joko	1.9	# FIXME: could this be refactored using expand?
108			# btw: "expand": look at scripts@CPAN (System Administration):
109			# there is a perl make with perl
110	joko	1.10	sub _var_deref_test {
111	joko	1.1	my $obj = shift;
112	joko	1.4	my $options = shift;
113	joko	1.1	my $result;
114			if ((ref $obj) eq 'ARRAY') {
115			foreach (@{$obj}) {
116			my $ref = ref $_;
117			if ($ref) {
118	joko	1.4	push(@{$result}, var_deref($_, $options));
119			#undef $_;
120	joko	1.1	} else {
121	joko	1.4	#push(@{$result}, $_);
122			push(@{$result}, deep_copy($_));
123	joko	1.1	}
124	joko	1.4	#undef $_ if $options->{destroy};
125			#$options->{destroy}->($_) if $options->{destroy};
126	joko	1.1	}
127	joko	1.2	# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ???
128	joko	1.1	} else {
129			foreach (keys %{$obj}) {
130			my $key = $_;
131			my $ref = ref $obj->{$_};
132			if ($ref) {
133	joko	1.4	$result->{$_} = var_deref($obj->{$_}, $options);
134			#undef $obj->{$_};
135	joko	1.1	} else {
136	joko	1.4	#$result->{$_} = $obj->{$_};
137			$result->{$_} = deep_copy($obj->{$_});
138	joko	1.1	}
139	joko	1.4	#undef $obj->{$_} if $options->{destroy};
140			#$options->{destroy}->($obj->{$_}) if $options->{destroy};
141	joko	1.1	}
142			}
143	joko	1.4	#undef $obj if $options->{destroy};
144			$options->{cb_destroy}->($obj) if $options->{cb_destroy};
145	joko	1.1	return $result;
146			}
147
148
149	joko	1.13	# convert values in hash to utf8 (and back) to be ready for (e.g.) encapsulation in XML
150			# but still using the known latin locale stuff
151	joko	1.4	sub expand {
152
153			my $obj = shift;
154			my $options = shift;
155			my $result;
156
157	joko	1.10	#print "ref: ", ref $obj, "\n";
158
159			if (ref $obj eq 'ARRAY') {
160	joko	1.4
161			IterArray @$obj, sub {
162			my $item;
163			# if current item is a reference ...
164			if (ref $_[0]) {
165	jonen	1.14	$item = $_[0];
166			# if $options->{childObj2string} is TRUE or STRING don't expand referenced object,
167			# instead replace it by per option choosed string (default: o_<classname>_<ref type>_<guid> )
168			if ($item && $options->{childObj2string}) {
169			$item = childObj2string($item, $options->{childObj2string});
170			} else {
171			# ... expand structure recursively
172			$item = expand($_[0], $options);
173			}
174	joko	1.4	# destroy item via seperate callback method (a POST) if requested
175			#$options->{cb}->{destroy}->($_[0]) if $options->{destroy};
176
177			# ... assume plain scalar
178			} else {
179			#$item = deep_copy($_[0]);
180			$item = $_[0];
181			# conversions/encodings
182	joko	1.10	$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8});
183			$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin});
184	joko	1.4	}
185			#push(@{$result}, $item) if $item; # use item only if not undef (TODO: make configurable via $options)
186			push(@{$result}, $item); # use item in any case
187
188			}
189
190	joko	1.10	} elsif (ref $obj eq 'CODE') {
191			#print Dumper($obj);
192			#exit;
193
194	joko	1.4	# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ???
195	joko	1.10	} elsif (ref $obj) {
196	joko	1.4
197			IterHash %$obj, sub {
198			my $item;
199
200			# if current item is a reference ...
201			if (ref $_[1]) {
202	jonen	1.14	$item = $_[1];
203			# if $options->{childObj2string} is TRUE or STRING don't expand referenced object,
204			# instead replace it by per option choosed string (default: o_<classname>_<ref type>_<guid> )
205			if ($item && $options->{childObj2string} && !(ref $_[1] eq "ARRAY") && !(ref $_[1] eq "HASH")) {
206			$item = childObj2string($item, $options->{childObj2string});
207			} else {
208			# ... expand structure recursively
209			$item = expand($_[1], $options);
210			}
211	joko	1.4	# destroy item via seperate callback method (a POST) if requested
212			#$options->{cb}->{destroy}->($_[1]) if $options->{destroy};
213
214			# ... assume plain scalar
215			} else {
216			#$item = deep_copy($_[1]);
217			$item = $_[1];
218			# conversions/encodings
219	joko	1.10	$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8});
220			$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin});
221	joko	1.4	}
222			#$result->{$_[0]} = $item if $item; # use item only if not undef (TODO: make configurable via $options)
223			$result->{$_[0]} = $item; # use item in any case
224			}
225
226	joko	1.10	} else {
227			#die ("not a reference!");
228			$result = $obj;
229
230	joko	1.4	}
231
232			# convert all values to utf8 (inside complex struct)
233			# now done in core-item-callbacks via Greg London's "Iterate" from CPAN
234	joko	1.13	# latin_to_utf8($result) if ($options->{utf8});
235	joko	1.4
236			# destroy persistent object from memory to be sure to get a fresh one next time
237			#undef $obj if $options->{destroy};
238			#$options->{cb_destroy}->($obj) if $options->{cb_destroy};
239			#$options->{cb}->{destroy}->($obj) if $options->{destroy};
240
241			return $result;
242			}
243
244	joko	1.1
245
246			my @indexstack;
247	joko	1.10	sub _var_traverse_mixin_update_old {
248	joko	1.1	my $obj = shift;
249			my $data = shift;
250			my $bool_recursion = shift;
251			if (!$bool_recursion) {
252			@indexstack = ();
253			}
254			my $result;
255
256			# 'ARRAY' does not work!
257			if ((ref $obj) eq 'ARRAY') {
258			#print "ARRAY\n";
259			my $i = 0;
260			foreach (@{$obj}) {
261			push @indexstack, $i;
262			my $ref = ref $_;
263			if ($ref) {
264			#$obj->[$i] = var_mixin($_, $data, 1);
265			var_traverse_mixin_update($_, $data, 1);
266			} else {
267			$obj->[$i] = $_;
268			}
269			pop @indexstack;
270			$i++;
271			}
272			} else {
273			foreach (keys %{$obj}) {
274			push @indexstack, $_;
275			my $ref = ref $obj->{$_};
276			if ($ref) {
277			#$obj->{$_} = var_mixin($obj->{$_}, $data, 1);
278			var_traverse_mixin_update($obj->{$_}, $data, 1);
279			} else {
280			#$obj->{$_} = $obj->{$_};
281			my $evstring = getSlot($data);
282			$obj->{$_} = $evstring;
283
284			}
285			pop @indexstack;
286			}
287			}
288			#return $result;
289			}
290
291	joko	1.10	sub merge_to {
292			_hash2object(@_);
293			# TODO:
294	joko	1.16	# re-implement using CPAN's "Iterate" and/or a modified Hash::Merge.
295	joko	1.2	}
296
297	joko	1.10
298	joko	1.2	# todo: maybe do diff(s) here sometimes!?
299	joko	1.10	sub _hash2object {
300	joko	1.2	my $object = shift;
301			my $data = shift;
302			my $options = shift;
303
304	joko	1.3	#print "hash2object", "\n";
305
306	joko	1.2	# "patch" needed 'cause php passes numerical-indexed-arrays as hash-tables,
307			# this method corrects this
308	joko	1.10	numhash2list($data) if ($options->{php});
309	joko	1.2
310			# utf8-conversion/-encoding (essential for I18N)
311	jonen	1.15	utf8_to_latin($data) if ($options->{utf8});
312	joko	1.2
313			# get fresh object from database
314			# todo:
315			# - handle "locked" objects !!!
316			# - check if already another update occoured (object-revisioning needed!)
317			#my $obj = $self->getObject($oid);
318
319			# mix changes into fresh object and save it back
320	joko	1.10	_hash2object_traverse_mixin($object, $data, 0, $options);
321	joko	1.2
322			# done in core mixin function?
323			#$self->{storage}->update($obj);
324
325			# we should "undef" some objects here to destroy them in memory and enforce reloading when used next time
326			# simulate:
327			#$self->{storage}->disconnect();
328
329			}
330
331			# ------------------------------------
332			# core mixin function
333			# TODO-FEATURE: make this possible in a reverse way: object is empty (no fields) and gets filled up by mixin-data
334
335			# remember keys of structures we are traversing
336			# this is a HACK:
337			# - don't (!!!) "packageglobal" @indexstack
338			# - it will lead to problems with parallelism!
339
340			#my @indexstack;
341
342			# traverse a deeply nested structure, mix in values from given hash, update underlying tangram-object
343	joko	1.10	sub _hash2object_traverse_mixin {
344	joko	1.2	my $object = shift;
345			my $data = shift;
346			my $bool_recursion = shift;
347	joko	1.5	my $options = shift;
348	joko	1.2
349			# clear our key - stack if we are called from user-code (non-recursively)
350			@indexstack = () if (!$bool_recursion);
351
352			my $classname = ref $object;
353			# if ($classname) {
354			# print STDERR "*****************", Dumper(Class::Tangram::attribute_types($classname)), "\n";
355			# }
356
357			# parser: detected OBJECT (a Tangram one?) (reftype == HASH) (assume)
358			# what's exactly done here? hmmm.... it works ;)
359			# maybe a HACK: please try not to use "IntrHash"es, maybe this cannot handle them!!!
360			# extend! check!
361	joko	1.10
362			#print attributes::reftype($object), "\n";
363
364			# V1
365			#if ((attributes::reftype($object) eq 'HASH') && (ref($object) ne 'HASH') && (ref($object) ne 'ARRAY')) {
366			# V2
367			my $reftype = attributes::reftype($object);
368			#print "reftype: '$reftype'", "\n";
369			if ($reftype eq 'HASH') {
370	joko	1.2
371			# print STDERR "===", "reftype: ", attributes::reftype($obj), "\n";
372
373	joko	1.5	my @fields;
374	joko	1.2	# loop through fields of object (Tangram-object)
375	joko	1.5	@fields = keys %{$object};
376
377			# loop through fields of to.be.injected-data (arbitrary Perl-data-structure)
378			@fields = keys %{$data} if $options->{init};
379	jonen	1.6	# @fields = keys %{$data} if $options->{mixin};
380	joko	1.5
381			foreach (@fields) {
382	joko	1.7	my $field = $_;
383			push @indexstack, $field;
384	joko	1.2
385			# determine type of object
386	joko	1.7	my $ref = ref $object->{$field};
387	joko	1.2	# print STDERR "attrname: $_ ATTRref: $ref", "\n";
388			if ($ref) {
389	joko	1.10	_hash2object_traverse_mixin($object->{$field}, $data, 1, $options);
390	joko	1.2	} else {
391	joko	1.10	my $val = ref_slot($data, \@indexstack);
392	joko	1.7
393	joko	1.8	#print Dumper($options);
394	joko	1.7	my $field_target = $field;
395			if (my $pattern = $options->{pattern_strip_key}) {
396			print "pattern: $pattern", "\n";
397			$field_target =~ s/$pattern//;
398			print "field: $field_target", "\n";
399			}
400
401			$object->{$field_target} = $val if defined $val;
402	joko	1.2	}
403			pop @indexstack;
404			}
405
406			# save object to database ...
407			# ... do an update if it already exists, do an insert if it doesn't
408			# my $objectId = $self->{storage}->id($obj);
409			# $logger->debug( __PACKAGE__ . "->saveObjectFromHash_traverse_mixin_update( object $obj objectId $objectId )" );
410			# if ($objectId) {
411			# $self->{storage}->update($obj);
412
413			#print __PACKAGE__ . ":", "\n";
414			#print Dumper($object);
415
416			# } else {
417			# $self->{storage}->insert($obj);
418			# }
419
420			}
421
422			#&& ( ref($obj) ne 'HASH' )
423
424			# loop through entries of array (IntrArray, isn't it?)
425			if ((ref $object) eq 'ARRAY') {
426			# print STDERR "===", "refttype ", attributes::reftype($obj), "\n";
427			my $i = 0;
428			foreach (@{$object}) {
429			push @indexstack, $i;
430			my $ref = ref $_;
431			# print STDERR "attrname: $_ ATTRref: $ref", "\n";
432	jonen	1.6	# if ($ref && $_) {
433			if ($ref) {
434	joko	1.10	_hash2object_traverse_mixin($_, $data, 1, $options);
435	joko	1.2	} else {
436	jonen	1.6	$object->[$i] = $_ if defined $_;
437	joko	1.2	}
438			pop @indexstack;
439			$i++;
440			}
441	joko	1.10
442			=pod
443			# object?
444			} else {
445			print "reference: ", ref $object, "\n";
446			print "reftype: ", $reftype, "\n";
447			die(__PACKAGE__ . "->_hash2object_traverse_mixin: can not handle this!");
448			=cut
449
450	joko	1.2	}
451
452			}
453
454
455	joko	1.10	# ACK's go to Randal L. Schwartz <merlyn@stonehenge.com>
456			# on the website:
457			# This text is copyright by Miller-Freeman, Inc., and is used with their permission.
458			# Further distribution or use is not permitted.
459			# please visit http://www.stonehenge.com/merlyn/UnixReview/col30.html
460			sub deep_copy1 {
461			my $this = shift;
462			if (not ref $this) {
463			$this;
464			} elsif (ref $this eq "ARRAY") {
465			[map deep_copy1($_), @$this];
466			} elsif (ref $this eq "HASH") {
467			+{map { $_ => deep_copy1($this->{$_}) } keys %$this};
468			} elsif (ref $this eq "CODE") {
469			$this;
470			} else { die "deep_copy1 asks: what type is $this?" }
471			#} else { print "deep_copy asks: what type is $this?", "\n"; }
472	joko	1.2	}
473
474	joko	1.10	# ACK's go to Andrew Pitonyak
475			# Copyright 2002, Andrew Pitonyak (perlboy@pitonyak.org)
476			# please visit: http://www.pitonyak.org/code/perl/Pitonyak/DeepCopy.pm.html
477	joko	1.7	sub deep_copy {
478	joko	1.12	Pitonyak::DeepCopy::deep_copy(@_);
479	jonen	1.14	}
480
481
482			sub childObj2string {
483			my $obj = shift;
484			my $option = shift;
485			my $classname = ref $obj;
486
487			if($option == 1) {
488			my $string = "o_" . $classname . "_" .$obj->{guid};
489			return $string;
490			}
491	joko	1.1	}
492	joko	1.12
493	joko	1.1
494			1;
495	joko	1.10	__END__
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