Mungle/Transform/Deep.pm

## ---------------------------------------------------------------------------
##  $Id: Deep.pm,v 1.17 2003/03/27 15:17:07 joko Exp $
## ---------------------------------------------------------------------------
##  $Log: Deep.pm,v $
##  Revision 1.17  2003/03/27 15:17:07  joko
##  namespace fixes for Data::Mungle::*
##
##  Revision 1.16  2003/03/27 15:04:52  joko
##  minor update: comment
##
##  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::Mungle::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::Mungle::Transform::Encode qw( latin_to_utf8 latin_to_utf8_scalar utf8_to_latin utf8_to_latin_scalar );
use Data::Mungle::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_" . $obj->{guid} . "_" . $classname;
  }  
  return $string;
}


1;
__END__
1	joko	1.7	## ---------------------------------------------------------------------------
2	jonen	1.18	## $Id: Deep.pm,v 1.17 2003/03/27 15:17:07 joko Exp $
3	joko	1.7	## ---------------------------------------------------------------------------
4	joko	1.8	## $Log: Deep.pm,v $
5	jonen	1.18	## Revision 1.17 2003/03/27 15:17:07 joko
6			## namespace fixes for Data::Mungle::*
7			##
8	joko	1.17	## Revision 1.16 2003/03/27 15:04:52 joko
9			## minor update: comment
10			##
11	joko	1.16	## Revision 1.15 2003/02/27 14:39:48 jonen
12			## + fixed bug at _hash2object()
13			##
14	jonen	1.15	## Revision 1.14 2003/02/22 17:13:55 jonen
15			## + added function 'childObject2string()' to encode 'child'-references to option related string
16			## + use new option at 'expand()' for replacing 'childObject2string'
17			##
18	jonen	1.14	## Revision 1.13 2003/02/21 01:48:50 joko
19			## renamed core function
20			##
21	joko	1.13	## Revision 1.12 2003/02/20 22:45:19 joko
22			## fix regarding new deep_copy
23			##
24	joko	1.12	## Revision 1.11 2003/02/20 21:13:54 joko
25			## - removed implementation of deep_copy2 - get this from the Pitonyak namespace (now cloned to repository)
26			##
27	joko	1.11	## Revision 1.10 2003/02/20 20:48:00 joko
28			## - refactored lots of code to Data::Code::Ref
29			## + alternative 'deep_copy' implementation
30			##
31	joko	1.10	## Revision 1.9 2003/02/18 19:35:56 joko
32			## +- modified 'sub refexpr2perlref': now can get the $delimiter passed, too
33			##
34	joko	1.9	## Revision 1.8 2003/02/09 05:10:56 joko
35			## + minor update
36			##
37	joko	1.8	## Revision 1.7 2003/01/19 03:26:59 joko
38			## + added 'sub deep_copy' - refactored from libp
39			## + add 'sub merge' - exported from CPAN's 'Hash::Merge'
40			##
41	joko	1.7	## Revision 1.6 2002/12/23 11:27:53 jonen
42			## + changed behavior WATCH!
43			##
44			## Revision 1.5 2002/12/16 19:57:54 joko
45			## + option 'init'
46			##
47			## Revision 1.4 2002/12/05 13:56:49 joko
48			## - var_deref
49			## + expand - more sophisticated dereferencing with callbacks using Iterate
50			##
51			## Revision 1.3 2002/12/03 05:34:55 joko
52			## + bugfix: now utilizing var_utf2iso from Data::Transform::Encode
53			##
54			## Revision 1.2 2002/12/01 04:44:07 joko
55			## + code from Data::Transform::OO
56			##
57			## Revision 1.1 2002/11/29 04:49:20 joko
58			## + initial check-in
59			##
60			## Revision 1.1 2002/10/10 03:26:00 cvsjoko
61			## + new
62			## ---------------------------------------------------------------------------
63	joko	1.1
64
65	joko	1.17	package Data::Mungle::Transform::Deep;
66	joko	1.1
67			use strict;
68			use warnings;
69
70			require Exporter;
71			our @ISA = qw( Exporter );
72	joko	1.2	our @EXPORT_OK = qw(
73	joko	1.4	&expand
74	joko	1.7	&deep_copy
75	joko	1.10	&merge_to
76	joko	1.1	);
77	joko	1.10
78	joko	1.1
79			use attributes;
80	joko	1.2	use Data::Dumper;
81	joko	1.10	use Iterate;
82	joko	1.7
83	joko	1.12	use Pitonyak::DeepCopy;
84	joko	1.17	use Data::Mungle::Transform::Encode qw( latin_to_utf8 latin_to_utf8_scalar utf8_to_latin utf8_to_latin_scalar );
85			use Data::Mungle::Code::Ref qw( ref_slot );
86	joko	1.1
87	joko	1.10	sub numhash2list {
88	joko	1.1	my $vref = shift;
89			#my $context = shift;
90			if (ref $vref eq 'HASH') {
91			foreach (keys %{$vref}) {
92			# if ((ref $vref->{$_}) =~ m/HASH/) {
93			if ((ref $vref->{$_}) =~ m/HASH/) {
94			if ($vref->{$_}{0}) { # might be a numerical-indexed array
95			#print "000\n";
96			#print "context: $context\n";
97			my @arr;
98			foreach my $key_numeric (sort keys %{$vref->{$_}}) {
99			push @arr, $vref->{$_}{$key_numeric};
100			}
101			$vref->{$_} = \@arr;
102			}
103	joko	1.10	numhash2list($vref->{$_});
104	joko	1.1	}
105			# } else {
106			# #$vref->{$_} = scalar2iso($vref->{$_});
107			# }
108			}
109			}
110			}
111
112
113	joko	1.9	# FIXME: could this be refactored using expand?
114			# btw: "expand": look at scripts@CPAN (System Administration):
115			# there is a perl make with perl
116	joko	1.10	sub _var_deref_test {
117	joko	1.1	my $obj = shift;
118	joko	1.4	my $options = shift;
119	joko	1.1	my $result;
120			if ((ref $obj) eq 'ARRAY') {
121			foreach (@{$obj}) {
122			my $ref = ref $_;
123			if ($ref) {
124	joko	1.4	push(@{$result}, var_deref($_, $options));
125			#undef $_;
126	joko	1.1	} else {
127	joko	1.4	#push(@{$result}, $_);
128			push(@{$result}, deep_copy($_));
129	joko	1.1	}
130	joko	1.4	#undef $_ if $options->{destroy};
131			#$options->{destroy}->($_) if $options->{destroy};
132	joko	1.1	}
133	joko	1.2	# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ???
134	joko	1.1	} else {
135			foreach (keys %{$obj}) {
136			my $key = $_;
137			my $ref = ref $obj->{$_};
138			if ($ref) {
139	joko	1.4	$result->{$_} = var_deref($obj->{$_}, $options);
140			#undef $obj->{$_};
141	joko	1.1	} else {
142	joko	1.4	#$result->{$_} = $obj->{$_};
143			$result->{$_} = deep_copy($obj->{$_});
144	joko	1.1	}
145	joko	1.4	#undef $obj->{$_} if $options->{destroy};
146			#$options->{destroy}->($obj->{$_}) if $options->{destroy};
147	joko	1.1	}
148			}
149	joko	1.4	#undef $obj if $options->{destroy};
150			$options->{cb_destroy}->($obj) if $options->{cb_destroy};
151	joko	1.1	return $result;
152			}
153
154
155	joko	1.13	# convert values in hash to utf8 (and back) to be ready for (e.g.) encapsulation in XML
156			# but still using the known latin locale stuff
157	joko	1.4	sub expand {
158
159			my $obj = shift;
160			my $options = shift;
161			my $result;
162
163	joko	1.10	#print "ref: ", ref $obj, "\n";
164
165			if (ref $obj eq 'ARRAY') {
166	joko	1.4
167			IterArray @$obj, sub {
168			my $item;
169			# if current item is a reference ...
170			if (ref $_[0]) {
171	jonen	1.14	$item = $_[0];
172			# if $options->{childObj2string} is TRUE or STRING don't expand referenced object,
173			# instead replace it by per option choosed string (default: o_<classname>_<ref type>_<guid> )
174			if ($item && $options->{childObj2string}) {
175			$item = childObj2string($item, $options->{childObj2string});
176			} else {
177			# ... expand structure recursively
178			$item = expand($_[0], $options);
179			}
180	joko	1.4	# destroy item via seperate callback method (a POST) if requested
181			#$options->{cb}->{destroy}->($_[0]) if $options->{destroy};
182
183			# ... assume plain scalar
184			} else {
185			#$item = deep_copy($_[0]);
186			$item = $_[0];
187			# conversions/encodings
188	joko	1.10	$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8});
189			$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin});
190	joko	1.4	}
191			#push(@{$result}, $item) if $item; # use item only if not undef (TODO: make configurable via $options)
192			push(@{$result}, $item); # use item in any case
193
194			}
195
196	joko	1.10	} elsif (ref $obj eq 'CODE') {
197			#print Dumper($obj);
198			#exit;
199
200	joko	1.4	# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ???
201	joko	1.10	} elsif (ref $obj) {
202	joko	1.4
203			IterHash %$obj, sub {
204			my $item;
205
206			# if current item is a reference ...
207			if (ref $_[1]) {
208	jonen	1.14	$item = $_[1];
209			# if $options->{childObj2string} is TRUE or STRING don't expand referenced object,
210			# instead replace it by per option choosed string (default: o_<classname>_<ref type>_<guid> )
211			if ($item && $options->{childObj2string} && !(ref $_[1] eq "ARRAY") && !(ref $_[1] eq "HASH")) {
212			$item = childObj2string($item, $options->{childObj2string});
213			} else {
214			# ... expand structure recursively
215			$item = expand($_[1], $options);
216			}
217	joko	1.4	# destroy item via seperate callback method (a POST) if requested
218			#$options->{cb}->{destroy}->($_[1]) if $options->{destroy};
219
220			# ... assume plain scalar
221			} else {
222			#$item = deep_copy($_[1]);
223			$item = $_[1];
224			# conversions/encodings
225	joko	1.10	$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8});
226			$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin});
227	joko	1.4	}
228			#$result->{$_[0]} = $item if $item; # use item only if not undef (TODO: make configurable via $options)
229			$result->{$_[0]} = $item; # use item in any case
230			}
231
232	joko	1.10	} else {
233			#die ("not a reference!");
234			$result = $obj;
235
236	joko	1.4	}
237
238			# convert all values to utf8 (inside complex struct)
239			# now done in core-item-callbacks via Greg London's "Iterate" from CPAN
240	joko	1.13	# latin_to_utf8($result) if ($options->{utf8});
241	joko	1.4
242			# destroy persistent object from memory to be sure to get a fresh one next time
243			#undef $obj if $options->{destroy};
244			#$options->{cb_destroy}->($obj) if $options->{cb_destroy};
245			#$options->{cb}->{destroy}->($obj) if $options->{destroy};
246
247			return $result;
248			}
249
250	joko	1.1
251
252			my @indexstack;
253	joko	1.10	sub _var_traverse_mixin_update_old {
254	joko	1.1	my $obj = shift;
255			my $data = shift;
256			my $bool_recursion = shift;
257			if (!$bool_recursion) {
258			@indexstack = ();
259			}
260			my $result;
261
262			# 'ARRAY' does not work!
263			if ((ref $obj) eq 'ARRAY') {
264			#print "ARRAY\n";
265			my $i = 0;
266			foreach (@{$obj}) {
267			push @indexstack, $i;
268			my $ref = ref $_;
269			if ($ref) {
270			#$obj->[$i] = var_mixin($_, $data, 1);
271			var_traverse_mixin_update($_, $data, 1);
272			} else {
273			$obj->[$i] = $_;
274			}
275			pop @indexstack;
276			$i++;
277			}
278			} else {
279			foreach (keys %{$obj}) {
280			push @indexstack, $_;
281			my $ref = ref $obj->{$_};
282			if ($ref) {
283			#$obj->{$_} = var_mixin($obj->{$_}, $data, 1);
284			var_traverse_mixin_update($obj->{$_}, $data, 1);
285			} else {
286			#$obj->{$_} = $obj->{$_};
287			my $evstring = getSlot($data);
288			$obj->{$_} = $evstring;
289
290			}
291			pop @indexstack;
292			}
293			}
294			#return $result;
295			}
296
297	joko	1.10	sub merge_to {
298			_hash2object(@_);
299			# TODO:
300	joko	1.16	# re-implement using CPAN's "Iterate" and/or a modified Hash::Merge.
301	joko	1.2	}
302
303	joko	1.10
304	joko	1.2	# todo: maybe do diff(s) here sometimes!?
305	joko	1.10	sub _hash2object {
306	joko	1.2	my $object = shift;
307			my $data = shift;
308			my $options = shift;
309
310	joko	1.3	#print "hash2object", "\n";
311
312	joko	1.2	# "patch" needed 'cause php passes numerical-indexed-arrays as hash-tables,
313			# this method corrects this
314	joko	1.10	numhash2list($data) if ($options->{php});
315	joko	1.2
316			# utf8-conversion/-encoding (essential for I18N)
317	jonen	1.15	utf8_to_latin($data) if ($options->{utf8});
318	joko	1.2
319			# get fresh object from database
320			# todo:
321			# - handle "locked" objects !!!
322			# - check if already another update occoured (object-revisioning needed!)
323			#my $obj = $self->getObject($oid);
324
325			# mix changes into fresh object and save it back
326	joko	1.10	_hash2object_traverse_mixin($object, $data, 0, $options);
327	joko	1.2
328			# done in core mixin function?
329			#$self->{storage}->update($obj);
330
331			# we should "undef" some objects here to destroy them in memory and enforce reloading when used next time
332			# simulate:
333			#$self->{storage}->disconnect();
334
335			}
336
337			# ------------------------------------
338			# core mixin function
339			# TODO-FEATURE: make this possible in a reverse way: object is empty (no fields) and gets filled up by mixin-data
340
341			# remember keys of structures we are traversing
342			# this is a HACK:
343			# - don't (!!!) "packageglobal" @indexstack
344			# - it will lead to problems with parallelism!
345
346			#my @indexstack;
347
348			# traverse a deeply nested structure, mix in values from given hash, update underlying tangram-object
349	joko	1.10	sub _hash2object_traverse_mixin {
350	joko	1.2	my $object = shift;
351			my $data = shift;
352			my $bool_recursion = shift;
353	joko	1.5	my $options = shift;
354	joko	1.2
355			# clear our key - stack if we are called from user-code (non-recursively)
356			@indexstack = () if (!$bool_recursion);
357
358			my $classname = ref $object;
359			# if ($classname) {
360			# print STDERR "*****************", Dumper(Class::Tangram::attribute_types($classname)), "\n";
361			# }
362
363			# parser: detected OBJECT (a Tangram one?) (reftype == HASH) (assume)
364			# what's exactly done here? hmmm.... it works ;)
365			# maybe a HACK: please try not to use "IntrHash"es, maybe this cannot handle them!!!
366			# extend! check!
367	joko	1.10
368			#print attributes::reftype($object), "\n";
369
370			# V1
371			#if ((attributes::reftype($object) eq 'HASH') && (ref($object) ne 'HASH') && (ref($object) ne 'ARRAY')) {
372			# V2
373			my $reftype = attributes::reftype($object);
374			#print "reftype: '$reftype'", "\n";
375			if ($reftype eq 'HASH') {
376	joko	1.2
377			# print STDERR "===", "reftype: ", attributes::reftype($obj), "\n";
378
379	joko	1.5	my @fields;
380	joko	1.2	# loop through fields of object (Tangram-object)
381	joko	1.5	@fields = keys %{$object};
382
383			# loop through fields of to.be.injected-data (arbitrary Perl-data-structure)
384			@fields = keys %{$data} if $options->{init};
385	jonen	1.6	# @fields = keys %{$data} if $options->{mixin};
386	joko	1.5
387			foreach (@fields) {
388	joko	1.7	my $field = $_;
389			push @indexstack, $field;
390	joko	1.2
391			# determine type of object
392	joko	1.7	my $ref = ref $object->{$field};
393	joko	1.2	# print STDERR "attrname: $_ ATTRref: $ref", "\n";
394			if ($ref) {
395	joko	1.10	_hash2object_traverse_mixin($object->{$field}, $data, 1, $options);
396	joko	1.2	} else {
397	joko	1.10	my $val = ref_slot($data, \@indexstack);
398	joko	1.7
399	joko	1.8	#print Dumper($options);
400	joko	1.7	my $field_target = $field;
401			if (my $pattern = $options->{pattern_strip_key}) {
402			print "pattern: $pattern", "\n";
403			$field_target =~ s/$pattern//;
404			print "field: $field_target", "\n";
405			}
406
407			$object->{$field_target} = $val if defined $val;
408	joko	1.2	}
409			pop @indexstack;
410			}
411
412			# save object to database ...
413			# ... do an update if it already exists, do an insert if it doesn't
414			# my $objectId = $self->{storage}->id($obj);
415			# $logger->debug( __PACKAGE__ . "->saveObjectFromHash_traverse_mixin_update( object $obj objectId $objectId )" );
416			# if ($objectId) {
417			# $self->{storage}->update($obj);
418
419			#print __PACKAGE__ . ":", "\n";
420			#print Dumper($object);
421
422			# } else {
423			# $self->{storage}->insert($obj);
424			# }
425
426			}
427
428			#&& ( ref($obj) ne 'HASH' )
429
430			# loop through entries of array (IntrArray, isn't it?)
431			if ((ref $object) eq 'ARRAY') {
432			# print STDERR "===", "refttype ", attributes::reftype($obj), "\n";
433			my $i = 0;
434			foreach (@{$object}) {
435			push @indexstack, $i;
436			my $ref = ref $_;
437			# print STDERR "attrname: $_ ATTRref: $ref", "\n";
438	jonen	1.6	# if ($ref && $_) {
439			if ($ref) {
440	joko	1.10	_hash2object_traverse_mixin($_, $data, 1, $options);
441	joko	1.2	} else {
442	jonen	1.6	$object->[$i] = $_ if defined $_;
443	joko	1.2	}
444			pop @indexstack;
445			$i++;
446			}
447	joko	1.10
448			=pod
449			# object?
450			} else {
451			print "reference: ", ref $object, "\n";
452			print "reftype: ", $reftype, "\n";
453			die(__PACKAGE__ . "->_hash2object_traverse_mixin: can not handle this!");
454			=cut
455
456	joko	1.2	}
457
458			}
459
460
461	joko	1.10	# ACK's go to Randal L. Schwartz <merlyn@stonehenge.com>
462			# on the website:
463			# This text is copyright by Miller-Freeman, Inc., and is used with their permission.
464			# Further distribution or use is not permitted.
465			# please visit http://www.stonehenge.com/merlyn/UnixReview/col30.html
466			sub deep_copy1 {
467			my $this = shift;
468			if (not ref $this) {
469			$this;
470			} elsif (ref $this eq "ARRAY") {
471			[map deep_copy1($_), @$this];
472			} elsif (ref $this eq "HASH") {
473			+{map { $_ => deep_copy1($this->{$_}) } keys %$this};
474			} elsif (ref $this eq "CODE") {
475			$this;
476			} else { die "deep_copy1 asks: what type is $this?" }
477			#} else { print "deep_copy asks: what type is $this?", "\n"; }
478	joko	1.2	}
479
480	joko	1.10	# ACK's go to Andrew Pitonyak
481			# Copyright 2002, Andrew Pitonyak (perlboy@pitonyak.org)
482			# please visit: http://www.pitonyak.org/code/perl/Pitonyak/DeepCopy.pm.html
483	joko	1.7	sub deep_copy {
484	joko	1.12	Pitonyak::DeepCopy::deep_copy(@_);
485	jonen	1.14	}
486
487
488			sub childObj2string {
489			my $obj = shift;
490			my $option = shift;
491			my $classname = ref $obj;
492
493			if($option == 1) {
494	jonen	1.18	my $string = "o_" . $obj->{guid} . "_" . $classname;
495	jonen	1.14	}
496	jonen	1.18	return $string;
497	joko	1.1	}
498	joko	1.12
499	joko	1.1
500			1;
501	joko	1.10	__END__
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