Mungle/Transform/Deep.pm

## ---------------------------------------------------------------------------
##  $Id: Deep.pm,v 1.14 2003/02/22 17:13:55 jonen Exp $
## ---------------------------------------------------------------------------
##  $Log: Deep.pm,v $
##  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".
}


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