Mungle/Transform/Deep.pm

## ---------------------------------------------------------------------------
##  $Id: Deep.pm,v 1.18 2003/03/28 03:07:26 jonen Exp $
## ---------------------------------------------------------------------------
##  $Log: Deep.pm,v $
##  Revision 1.18  2003/03/28 03:07:26  jonen
##  + minor changes
##
##  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;
  my $string;
  
  if($option == 1) {
    $string = "o_" . $obj->{guid} . "_" . $classname;
  }  
  return $string;
}


1;
__END__
1	joko	1.7	## ---------------------------------------------------------------------------
2	jonen	1.19	## $Id: Deep.pm,v 1.18 2003/03/28 03:07:26 jonen Exp $
3	joko	1.7	## ---------------------------------------------------------------------------
4	joko	1.8	## $Log: Deep.pm,v $
5	jonen	1.19	## Revision 1.18 2003/03/28 03:07:26 jonen
6			## + minor changes
7			##
8	jonen	1.18	## Revision 1.17 2003/03/27 15:17:07 joko
9			## namespace fixes for Data::Mungle::*
10			##
11	joko	1.17	## Revision 1.16 2003/03/27 15:04:52 joko
12			## minor update: comment
13			##
14	joko	1.16	## Revision 1.15 2003/02/27 14:39:48 jonen
15			## + fixed bug at _hash2object()
16			##
17	jonen	1.15	## Revision 1.14 2003/02/22 17:13:55 jonen
18			## + added function 'childObject2string()' to encode 'child'-references to option related string
19			## + use new option at 'expand()' for replacing 'childObject2string'
20			##
21	jonen	1.14	## Revision 1.13 2003/02/21 01:48:50 joko
22			## renamed core function
23			##
24	joko	1.13	## Revision 1.12 2003/02/20 22:45:19 joko
25			## fix regarding new deep_copy
26			##
27	joko	1.12	## Revision 1.11 2003/02/20 21:13:54 joko
28			## - removed implementation of deep_copy2 - get this from the Pitonyak namespace (now cloned to repository)
29			##
30	joko	1.11	## Revision 1.10 2003/02/20 20:48:00 joko
31			## - refactored lots of code to Data::Code::Ref
32			## + alternative 'deep_copy' implementation
33			##
34	joko	1.10	## Revision 1.9 2003/02/18 19:35:56 joko
35			## +- modified 'sub refexpr2perlref': now can get the $delimiter passed, too
36			##
37	joko	1.9	## Revision 1.8 2003/02/09 05:10:56 joko
38			## + minor update
39			##
40	joko	1.8	## Revision 1.7 2003/01/19 03:26:59 joko
41			## + added 'sub deep_copy' - refactored from libp
42			## + add 'sub merge' - exported from CPAN's 'Hash::Merge'
43			##
44	joko	1.7	## Revision 1.6 2002/12/23 11:27:53 jonen
45			## + changed behavior WATCH!
46			##
47			## Revision 1.5 2002/12/16 19:57:54 joko
48			## + option 'init'
49			##
50			## Revision 1.4 2002/12/05 13:56:49 joko
51			## - var_deref
52			## + expand - more sophisticated dereferencing with callbacks using Iterate
53			##
54			## Revision 1.3 2002/12/03 05:34:55 joko
55			## + bugfix: now utilizing var_utf2iso from Data::Transform::Encode
56			##
57			## Revision 1.2 2002/12/01 04:44:07 joko
58			## + code from Data::Transform::OO
59			##
60			## Revision 1.1 2002/11/29 04:49:20 joko
61			## + initial check-in
62			##
63			## Revision 1.1 2002/10/10 03:26:00 cvsjoko
64			## + new
65			## ---------------------------------------------------------------------------
66	joko	1.1
67
68	joko	1.17	package Data::Mungle::Transform::Deep;
69	joko	1.1
70			use strict;
71			use warnings;
72
73			require Exporter;
74			our @ISA = qw( Exporter );
75	joko	1.2	our @EXPORT_OK = qw(
76	joko	1.4	&expand
77	joko	1.7	&deep_copy
78	joko	1.10	&merge_to
79	joko	1.1	);
80	joko	1.10
81	joko	1.1
82			use attributes;
83	joko	1.2	use Data::Dumper;
84	joko	1.10	use Iterate;
85	joko	1.7
86	joko	1.12	use Pitonyak::DeepCopy;
87	joko	1.17	use Data::Mungle::Transform::Encode qw( latin_to_utf8 latin_to_utf8_scalar utf8_to_latin utf8_to_latin_scalar );
88			use Data::Mungle::Code::Ref qw( ref_slot );
89	joko	1.1
90	joko	1.10	sub numhash2list {
91	joko	1.1	my $vref = shift;
92			#my $context = shift;
93			if (ref $vref eq 'HASH') {
94			foreach (keys %{$vref}) {
95			# if ((ref $vref->{$_}) =~ m/HASH/) {
96			if ((ref $vref->{$_}) =~ m/HASH/) {
97			if ($vref->{$_}{0}) { # might be a numerical-indexed array
98			#print "000\n";
99			#print "context: $context\n";
100			my @arr;
101			foreach my $key_numeric (sort keys %{$vref->{$_}}) {
102			push @arr, $vref->{$_}{$key_numeric};
103			}
104			$vref->{$_} = \@arr;
105			}
106	joko	1.10	numhash2list($vref->{$_});
107	joko	1.1	}
108			# } else {
109			# #$vref->{$_} = scalar2iso($vref->{$_});
110			# }
111			}
112			}
113			}
114
115
116	joko	1.9	# FIXME: could this be refactored using expand?
117			# btw: "expand": look at scripts@CPAN (System Administration):
118			# there is a perl make with perl
119	joko	1.10	sub _var_deref_test {
120	joko	1.1	my $obj = shift;
121	joko	1.4	my $options = shift;
122	joko	1.1	my $result;
123			if ((ref $obj) eq 'ARRAY') {
124			foreach (@{$obj}) {
125			my $ref = ref $_;
126			if ($ref) {
127	joko	1.4	push(@{$result}, var_deref($_, $options));
128			#undef $_;
129	joko	1.1	} else {
130	joko	1.4	#push(@{$result}, $_);
131			push(@{$result}, deep_copy($_));
132	joko	1.1	}
133	joko	1.4	#undef $_ if $options->{destroy};
134			#$options->{destroy}->($_) if $options->{destroy};
135	joko	1.1	}
136	joko	1.2	# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ???
137	joko	1.1	} else {
138			foreach (keys %{$obj}) {
139			my $key = $_;
140			my $ref = ref $obj->{$_};
141			if ($ref) {
142	joko	1.4	$result->{$_} = var_deref($obj->{$_}, $options);
143			#undef $obj->{$_};
144	joko	1.1	} else {
145	joko	1.4	#$result->{$_} = $obj->{$_};
146			$result->{$_} = deep_copy($obj->{$_});
147	joko	1.1	}
148	joko	1.4	#undef $obj->{$_} if $options->{destroy};
149			#$options->{destroy}->($obj->{$_}) if $options->{destroy};
150	joko	1.1	}
151			}
152	joko	1.4	#undef $obj if $options->{destroy};
153			$options->{cb_destroy}->($obj) if $options->{cb_destroy};
154	joko	1.1	return $result;
155			}
156
157
158	joko	1.13	# convert values in hash to utf8 (and back) to be ready for (e.g.) encapsulation in XML
159			# but still using the known latin locale stuff
160	joko	1.4	sub expand {
161
162			my $obj = shift;
163			my $options = shift;
164			my $result;
165
166	joko	1.10	#print "ref: ", ref $obj, "\n";
167
168			if (ref $obj eq 'ARRAY') {
169	joko	1.4
170			IterArray @$obj, sub {
171			my $item;
172			# if current item is a reference ...
173			if (ref $_[0]) {
174	jonen	1.14	$item = $_[0];
175			# if $options->{childObj2string} is TRUE or STRING don't expand referenced object,
176			# instead replace it by per option choosed string (default: o_<classname>_<ref type>_<guid> )
177			if ($item && $options->{childObj2string}) {
178			$item = childObj2string($item, $options->{childObj2string});
179			} else {
180			# ... expand structure recursively
181			$item = expand($_[0], $options);
182			}
183	joko	1.4	# destroy item via seperate callback method (a POST) if requested
184			#$options->{cb}->{destroy}->($_[0]) if $options->{destroy};
185
186			# ... assume plain scalar
187			} else {
188			#$item = deep_copy($_[0]);
189			$item = $_[0];
190			# conversions/encodings
191	joko	1.10	$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8});
192			$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin});
193	joko	1.4	}
194			#push(@{$result}, $item) if $item; # use item only if not undef (TODO: make configurable via $options)
195			push(@{$result}, $item); # use item in any case
196
197			}
198
199	joko	1.10	} elsif (ref $obj eq 'CODE') {
200			#print Dumper($obj);
201			#exit;
202
203	joko	1.4	# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ???
204	joko	1.10	} elsif (ref $obj) {
205	joko	1.4
206			IterHash %$obj, sub {
207			my $item;
208
209			# if current item is a reference ...
210			if (ref $_[1]) {
211	jonen	1.14	$item = $_[1];
212			# if $options->{childObj2string} is TRUE or STRING don't expand referenced object,
213			# instead replace it by per option choosed string (default: o_<classname>_<ref type>_<guid> )
214			if ($item && $options->{childObj2string} && !(ref $_[1] eq "ARRAY") && !(ref $_[1] eq "HASH")) {
215			$item = childObj2string($item, $options->{childObj2string});
216			} else {
217			# ... expand structure recursively
218			$item = expand($_[1], $options);
219			}
220	joko	1.4	# destroy item via seperate callback method (a POST) if requested
221			#$options->{cb}->{destroy}->($_[1]) if $options->{destroy};
222
223			# ... assume plain scalar
224			} else {
225			#$item = deep_copy($_[1]);
226			$item = $_[1];
227			# conversions/encodings
228	joko	1.10	$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8});
229			$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin});
230	joko	1.4	}
231			#$result->{$_[0]} = $item if $item; # use item only if not undef (TODO: make configurable via $options)
232			$result->{$_[0]} = $item; # use item in any case
233			}
234
235	joko	1.10	} else {
236			#die ("not a reference!");
237			$result = $obj;
238
239	joko	1.4	}
240
241			# convert all values to utf8 (inside complex struct)
242			# now done in core-item-callbacks via Greg London's "Iterate" from CPAN
243	joko	1.13	# latin_to_utf8($result) if ($options->{utf8});
244	joko	1.4
245			# destroy persistent object from memory to be sure to get a fresh one next time
246			#undef $obj if $options->{destroy};
247			#$options->{cb_destroy}->($obj) if $options->{cb_destroy};
248			#$options->{cb}->{destroy}->($obj) if $options->{destroy};
249
250			return $result;
251			}
252
253	joko	1.1
254
255			my @indexstack;
256	joko	1.10	sub _var_traverse_mixin_update_old {
257	joko	1.1	my $obj = shift;
258			my $data = shift;
259			my $bool_recursion = shift;
260			if (!$bool_recursion) {
261			@indexstack = ();
262			}
263			my $result;
264
265			# 'ARRAY' does not work!
266			if ((ref $obj) eq 'ARRAY') {
267			#print "ARRAY\n";
268			my $i = 0;
269			foreach (@{$obj}) {
270			push @indexstack, $i;
271			my $ref = ref $_;
272			if ($ref) {
273			#$obj->[$i] = var_mixin($_, $data, 1);
274			var_traverse_mixin_update($_, $data, 1);
275			} else {
276			$obj->[$i] = $_;
277			}
278			pop @indexstack;
279			$i++;
280			}
281			} else {
282			foreach (keys %{$obj}) {
283			push @indexstack, $_;
284			my $ref = ref $obj->{$_};
285			if ($ref) {
286			#$obj->{$_} = var_mixin($obj->{$_}, $data, 1);
287			var_traverse_mixin_update($obj->{$_}, $data, 1);
288			} else {
289			#$obj->{$_} = $obj->{$_};
290			my $evstring = getSlot($data);
291			$obj->{$_} = $evstring;
292
293			}
294			pop @indexstack;
295			}
296			}
297			#return $result;
298			}
299
300	joko	1.10	sub merge_to {
301			_hash2object(@_);
302			# TODO:
303	joko	1.16	# re-implement using CPAN's "Iterate" and/or a modified Hash::Merge.
304	joko	1.2	}
305
306	joko	1.10
307	joko	1.2	# todo: maybe do diff(s) here sometimes!?
308	joko	1.10	sub _hash2object {
309	joko	1.2	my $object = shift;
310			my $data = shift;
311			my $options = shift;
312
313	joko	1.3	#print "hash2object", "\n";
314
315	joko	1.2	# "patch" needed 'cause php passes numerical-indexed-arrays as hash-tables,
316			# this method corrects this
317	joko	1.10	numhash2list($data) if ($options->{php});
318	joko	1.2
319			# utf8-conversion/-encoding (essential for I18N)
320	jonen	1.15	utf8_to_latin($data) if ($options->{utf8});
321	joko	1.2
322			# get fresh object from database
323			# todo:
324			# - handle "locked" objects !!!
325			# - check if already another update occoured (object-revisioning needed!)
326			#my $obj = $self->getObject($oid);
327
328			# mix changes into fresh object and save it back
329	joko	1.10	_hash2object_traverse_mixin($object, $data, 0, $options);
330	joko	1.2
331			# done in core mixin function?
332			#$self->{storage}->update($obj);
333
334			# we should "undef" some objects here to destroy them in memory and enforce reloading when used next time
335			# simulate:
336			#$self->{storage}->disconnect();
337
338			}
339
340			# ------------------------------------
341			# core mixin function
342			# TODO-FEATURE: make this possible in a reverse way: object is empty (no fields) and gets filled up by mixin-data
343
344			# remember keys of structures we are traversing
345			# this is a HACK:
346			# - don't (!!!) "packageglobal" @indexstack
347			# - it will lead to problems with parallelism!
348
349			#my @indexstack;
350
351			# traverse a deeply nested structure, mix in values from given hash, update underlying tangram-object
352	joko	1.10	sub _hash2object_traverse_mixin {
353	joko	1.2	my $object = shift;
354			my $data = shift;
355			my $bool_recursion = shift;
356	joko	1.5	my $options = shift;
357	joko	1.2
358			# clear our key - stack if we are called from user-code (non-recursively)
359			@indexstack = () if (!$bool_recursion);
360
361			my $classname = ref $object;
362			# if ($classname) {
363			# print STDERR "*****************", Dumper(Class::Tangram::attribute_types($classname)), "\n";
364			# }
365
366			# parser: detected OBJECT (a Tangram one?) (reftype == HASH) (assume)
367			# what's exactly done here? hmmm.... it works ;)
368			# maybe a HACK: please try not to use "IntrHash"es, maybe this cannot handle them!!!
369			# extend! check!
370	joko	1.10
371			#print attributes::reftype($object), "\n";
372
373			# V1
374			#if ((attributes::reftype($object) eq 'HASH') && (ref($object) ne 'HASH') && (ref($object) ne 'ARRAY')) {
375			# V2
376			my $reftype = attributes::reftype($object);
377			#print "reftype: '$reftype'", "\n";
378			if ($reftype eq 'HASH') {
379	joko	1.2
380			# print STDERR "===", "reftype: ", attributes::reftype($obj), "\n";
381
382	joko	1.5	my @fields;
383	joko	1.2	# loop through fields of object (Tangram-object)
384	joko	1.5	@fields = keys %{$object};
385
386			# loop through fields of to.be.injected-data (arbitrary Perl-data-structure)
387			@fields = keys %{$data} if $options->{init};
388	jonen	1.6	# @fields = keys %{$data} if $options->{mixin};
389	joko	1.5
390			foreach (@fields) {
391	joko	1.7	my $field = $_;
392			push @indexstack, $field;
393	joko	1.2
394			# determine type of object
395	joko	1.7	my $ref = ref $object->{$field};
396	joko	1.2	# print STDERR "attrname: $_ ATTRref: $ref", "\n";
397			if ($ref) {
398	joko	1.10	_hash2object_traverse_mixin($object->{$field}, $data, 1, $options);
399	joko	1.2	} else {
400	joko	1.10	my $val = ref_slot($data, \@indexstack);
401	joko	1.7
402	joko	1.8	#print Dumper($options);
403	joko	1.7	my $field_target = $field;
404			if (my $pattern = $options->{pattern_strip_key}) {
405			print "pattern: $pattern", "\n";
406			$field_target =~ s/$pattern//;
407			print "field: $field_target", "\n";
408			}
409
410			$object->{$field_target} = $val if defined $val;
411	joko	1.2	}
412			pop @indexstack;
413			}
414
415			# save object to database ...
416			# ... do an update if it already exists, do an insert if it doesn't
417			# my $objectId = $self->{storage}->id($obj);
418			# $logger->debug( __PACKAGE__ . "->saveObjectFromHash_traverse_mixin_update( object $obj objectId $objectId )" );
419			# if ($objectId) {
420			# $self->{storage}->update($obj);
421
422			#print __PACKAGE__ . ":", "\n";
423			#print Dumper($object);
424
425			# } else {
426			# $self->{storage}->insert($obj);
427			# }
428
429			}
430
431			#&& ( ref($obj) ne 'HASH' )
432
433			# loop through entries of array (IntrArray, isn't it?)
434			if ((ref $object) eq 'ARRAY') {
435			# print STDERR "===", "refttype ", attributes::reftype($obj), "\n";
436			my $i = 0;
437			foreach (@{$object}) {
438			push @indexstack, $i;
439			my $ref = ref $_;
440			# print STDERR "attrname: $_ ATTRref: $ref", "\n";
441	jonen	1.6	# if ($ref && $_) {
442			if ($ref) {
443	joko	1.10	_hash2object_traverse_mixin($_, $data, 1, $options);
444	joko	1.2	} else {
445	jonen	1.6	$object->[$i] = $_ if defined $_;
446	joko	1.2	}
447			pop @indexstack;
448			$i++;
449			}
450	joko	1.10
451			=pod
452			# object?
453			} else {
454			print "reference: ", ref $object, "\n";
455			print "reftype: ", $reftype, "\n";
456			die(__PACKAGE__ . "->_hash2object_traverse_mixin: can not handle this!");
457			=cut
458
459	joko	1.2	}
460
461			}
462
463
464	joko	1.10	# ACK's go to Randal L. Schwartz <merlyn@stonehenge.com>
465			# on the website:
466			# This text is copyright by Miller-Freeman, Inc., and is used with their permission.
467			# Further distribution or use is not permitted.
468			# please visit http://www.stonehenge.com/merlyn/UnixReview/col30.html
469			sub deep_copy1 {
470			my $this = shift;
471			if (not ref $this) {
472			$this;
473			} elsif (ref $this eq "ARRAY") {
474			[map deep_copy1($_), @$this];
475			} elsif (ref $this eq "HASH") {
476			+{map { $_ => deep_copy1($this->{$_}) } keys %$this};
477			} elsif (ref $this eq "CODE") {
478			$this;
479			} else { die "deep_copy1 asks: what type is $this?" }
480			#} else { print "deep_copy asks: what type is $this?", "\n"; }
481	joko	1.2	}
482
483	joko	1.10	# ACK's go to Andrew Pitonyak
484			# Copyright 2002, Andrew Pitonyak (perlboy@pitonyak.org)
485			# please visit: http://www.pitonyak.org/code/perl/Pitonyak/DeepCopy.pm.html
486	joko	1.7	sub deep_copy {
487	joko	1.12	Pitonyak::DeepCopy::deep_copy(@_);
488	jonen	1.14	}
489
490
491			sub childObj2string {
492			my $obj = shift;
493			my $option = shift;
494			my $classname = ref $obj;
495	jonen	1.19	my $string;
496	jonen	1.14
497			if($option == 1) {
498	jonen	1.19	$string = "o_" . $obj->{guid} . "_" . $classname;
499	jonen	1.14	}
500	jonen	1.18	return $string;
501	joko	1.1	}
502	joko	1.12
503	joko	1.1
504			1;
505	joko	1.10	__END__
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