Mungle/Transform/Deep.pm

## ---------------------------------------------------------------------------
##  $Id: Deep.pm,v 1.20 2003/04/04 17:31:23 joko Exp $
## ---------------------------------------------------------------------------
##  $Log: Deep.pm,v $
##  Revision 1.20  2003/04/04 17:31:23  joko
##  minor update to 'childObj2string'
##
##  Revision 1.19  2003/03/28 03:11:25  jonen
##  + bugfix
##
##  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 twingle_reference );
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}) {
          $item = twingle_reference($item);
        } 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")) {
          $item = twingle_reference($item);
        } 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(@_);
}


1;
__END__
1	joko	1.7	## ---------------------------------------------------------------------------
2	joko	1.21	## $Id: Deep.pm,v 1.20 2003/04/04 17:31:23 joko Exp $
3	joko	1.7	## ---------------------------------------------------------------------------
4	joko	1.8	## $Log: Deep.pm,v $
5	joko	1.21	## Revision 1.20 2003/04/04 17:31:23 joko
6			## minor update to 'childObj2string'
7			##
8	joko	1.20	## Revision 1.19 2003/03/28 03:11:25 jonen
9			## + bugfix
10			##
11	jonen	1.19	## Revision 1.18 2003/03/28 03:07:26 jonen
12			## + minor changes
13			##
14	jonen	1.18	## Revision 1.17 2003/03/27 15:17:07 joko
15			## namespace fixes for Data::Mungle::*
16			##
17	joko	1.17	## Revision 1.16 2003/03/27 15:04:52 joko
18			## minor update: comment
19			##
20	joko	1.16	## Revision 1.15 2003/02/27 14:39:48 jonen
21			## + fixed bug at _hash2object()
22			##
23	jonen	1.15	## Revision 1.14 2003/02/22 17:13:55 jonen
24			## + added function 'childObject2string()' to encode 'child'-references to option related string
25			## + use new option at 'expand()' for replacing 'childObject2string'
26			##
27	jonen	1.14	## Revision 1.13 2003/02/21 01:48:50 joko
28			## renamed core function
29			##
30	joko	1.13	## Revision 1.12 2003/02/20 22:45:19 joko
31			## fix regarding new deep_copy
32			##
33	joko	1.12	## Revision 1.11 2003/02/20 21:13:54 joko
34			## - removed implementation of deep_copy2 - get this from the Pitonyak namespace (now cloned to repository)
35			##
36	joko	1.11	## Revision 1.10 2003/02/20 20:48:00 joko
37			## - refactored lots of code to Data::Code::Ref
38			## + alternative 'deep_copy' implementation
39			##
40	joko	1.10	## Revision 1.9 2003/02/18 19:35:56 joko
41			## +- modified 'sub refexpr2perlref': now can get the $delimiter passed, too
42			##
43	joko	1.9	## Revision 1.8 2003/02/09 05:10:56 joko
44			## + minor update
45			##
46	joko	1.8	## Revision 1.7 2003/01/19 03:26:59 joko
47			## + added 'sub deep_copy' - refactored from libp
48			## + add 'sub merge' - exported from CPAN's 'Hash::Merge'
49			##
50	joko	1.7	## Revision 1.6 2002/12/23 11:27:53 jonen
51			## + changed behavior WATCH!
52			##
53			## Revision 1.5 2002/12/16 19:57:54 joko
54			## + option 'init'
55			##
56			## Revision 1.4 2002/12/05 13:56:49 joko
57			## - var_deref
58			## + expand - more sophisticated dereferencing with callbacks using Iterate
59			##
60			## Revision 1.3 2002/12/03 05:34:55 joko
61			## + bugfix: now utilizing var_utf2iso from Data::Transform::Encode
62			##
63			## Revision 1.2 2002/12/01 04:44:07 joko
64			## + code from Data::Transform::OO
65			##
66			## Revision 1.1 2002/11/29 04:49:20 joko
67			## + initial check-in
68			##
69			## Revision 1.1 2002/10/10 03:26:00 cvsjoko
70			## + new
71			## ---------------------------------------------------------------------------
72	joko	1.1
73
74	joko	1.17	package Data::Mungle::Transform::Deep;
75	joko	1.1
76			use strict;
77			use warnings;
78
79			require Exporter;
80			our @ISA = qw( Exporter );
81	joko	1.2	our @EXPORT_OK = qw(
82	joko	1.4	&expand
83	joko	1.7	&deep_copy
84	joko	1.10	&merge_to
85	joko	1.1	);
86	joko	1.10
87	joko	1.1
88			use attributes;
89	joko	1.2	use Data::Dumper;
90	joko	1.10	use Iterate;
91	joko	1.7
92	joko	1.12	use Pitonyak::DeepCopy;
93	joko	1.21	use Data::Mungle::Transform::Encode qw( latin_to_utf8 latin_to_utf8_scalar utf8_to_latin utf8_to_latin_scalar twingle_reference );
94	joko	1.17	use Data::Mungle::Code::Ref qw( ref_slot );
95	joko	1.1
96	joko	1.10	sub numhash2list {
97	joko	1.1	my $vref = shift;
98			#my $context = shift;
99			if (ref $vref eq 'HASH') {
100			foreach (keys %{$vref}) {
101			# if ((ref $vref->{$_}) =~ m/HASH/) {
102			if ((ref $vref->{$_}) =~ m/HASH/) {
103			if ($vref->{$_}{0}) { # might be a numerical-indexed array
104			#print "000\n";
105			#print "context: $context\n";
106			my @arr;
107			foreach my $key_numeric (sort keys %{$vref->{$_}}) {
108			push @arr, $vref->{$_}{$key_numeric};
109			}
110			$vref->{$_} = \@arr;
111			}
112	joko	1.10	numhash2list($vref->{$_});
113	joko	1.1	}
114			# } else {
115			# #$vref->{$_} = scalar2iso($vref->{$_});
116			# }
117			}
118			}
119			}
120
121
122	joko	1.9	# FIXME: could this be refactored using expand?
123			# btw: "expand": look at scripts@CPAN (System Administration):
124			# there is a perl make with perl
125	joko	1.10	sub _var_deref_test {
126	joko	1.1	my $obj = shift;
127	joko	1.4	my $options = shift;
128	joko	1.1	my $result;
129			if ((ref $obj) eq 'ARRAY') {
130			foreach (@{$obj}) {
131			my $ref = ref $_;
132			if ($ref) {
133	joko	1.4	push(@{$result}, var_deref($_, $options));
134			#undef $_;
135	joko	1.1	} else {
136	joko	1.4	#push(@{$result}, $_);
137			push(@{$result}, deep_copy($_));
138	joko	1.1	}
139	joko	1.4	#undef $_ if $options->{destroy};
140			#$options->{destroy}->($_) if $options->{destroy};
141	joko	1.1	}
142	joko	1.2	# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ???
143	joko	1.1	} else {
144			foreach (keys %{$obj}) {
145			my $key = $_;
146			my $ref = ref $obj->{$_};
147			if ($ref) {
148	joko	1.4	$result->{$_} = var_deref($obj->{$_}, $options);
149			#undef $obj->{$_};
150	joko	1.1	} else {
151	joko	1.4	#$result->{$_} = $obj->{$_};
152			$result->{$_} = deep_copy($obj->{$_});
153	joko	1.1	}
154	joko	1.4	#undef $obj->{$_} if $options->{destroy};
155			#$options->{destroy}->($obj->{$_}) if $options->{destroy};
156	joko	1.1	}
157			}
158	joko	1.4	#undef $obj if $options->{destroy};
159			$options->{cb_destroy}->($obj) if $options->{cb_destroy};
160	joko	1.1	return $result;
161			}
162
163
164	joko	1.13	# convert values in hash to utf8 (and back) to be ready for (e.g.) encapsulation in XML
165			# but still using the known latin locale stuff
166	joko	1.4	sub expand {
167
168			my $obj = shift;
169			my $options = shift;
170			my $result;
171
172	joko	1.10	#print "ref: ", ref $obj, "\n";
173
174			if (ref $obj eq 'ARRAY') {
175	joko	1.4
176			IterArray @$obj, sub {
177			my $item;
178			# if current item is a reference ...
179			if (ref $_[0]) {
180	jonen	1.14	$item = $_[0];
181			# if $options->{childObj2string} is TRUE or STRING don't expand referenced object,
182			# instead replace it by per option choosed string (default: o_<classname>_<ref type>_<guid> )
183			if ($item && $options->{childObj2string}) {
184	joko	1.21	$item = twingle_reference($item);
185	jonen	1.14	} else {
186			# ... expand structure recursively
187			$item = expand($_[0], $options);
188			}
189	joko	1.4	# destroy item via seperate callback method (a POST) if requested
190			#$options->{cb}->{destroy}->($_[0]) if $options->{destroy};
191
192			# ... assume plain scalar
193			} else {
194			#$item = deep_copy($_[0]);
195			$item = $_[0];
196			# conversions/encodings
197	joko	1.10	$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8});
198			$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin});
199	joko	1.4	}
200			#push(@{$result}, $item) if $item; # use item only if not undef (TODO: make configurable via $options)
201			push(@{$result}, $item); # use item in any case
202
203			}
204
205	joko	1.10	} elsif (ref $obj eq 'CODE') {
206			#print Dumper($obj);
207			#exit;
208
209	joko	1.4	# TODO: "} elsif (ref $obj eq 'HASH') { [...] } else { croak 'could not deref blah'; }" ???
210	joko	1.10	} elsif (ref $obj) {
211	joko	1.4
212			IterHash %$obj, sub {
213			my $item;
214
215			# if current item is a reference ...
216			if (ref $_[1]) {
217	jonen	1.14	$item = $_[1];
218			# if $options->{childObj2string} is TRUE or STRING don't expand referenced object,
219			# instead replace it by per option choosed string (default: o_<classname>_<ref type>_<guid> )
220			if ($item && $options->{childObj2string} && !(ref $_[1] eq "ARRAY") && !(ref $_[1] eq "HASH")) {
221	joko	1.21	$item = twingle_reference($item);
222	jonen	1.14	} else {
223			# ... expand structure recursively
224			$item = expand($_[1], $options);
225			}
226	joko	1.4	# destroy item via seperate callback method (a POST) if requested
227			#$options->{cb}->{destroy}->($_[1]) if $options->{destroy};
228
229			# ... assume plain scalar
230			} else {
231			#$item = deep_copy($_[1]);
232			$item = $_[1];
233			# conversions/encodings
234	joko	1.10	$item = latin_to_utf8_scalar($item) if ($item && $options->{utf8});
235			$item = utf8_to_latin_scalar($item) if ($item && $options->{to_latin});
236	joko	1.4	}
237			#$result->{$_[0]} = $item if $item; # use item only if not undef (TODO: make configurable via $options)
238			$result->{$_[0]} = $item; # use item in any case
239			}
240
241	joko	1.10	} else {
242			#die ("not a reference!");
243			$result = $obj;
244
245	joko	1.4	}
246
247			# convert all values to utf8 (inside complex struct)
248			# now done in core-item-callbacks via Greg London's "Iterate" from CPAN
249	joko	1.13	# latin_to_utf8($result) if ($options->{utf8});
250	joko	1.4
251			# destroy persistent object from memory to be sure to get a fresh one next time
252			#undef $obj if $options->{destroy};
253			#$options->{cb_destroy}->($obj) if $options->{cb_destroy};
254			#$options->{cb}->{destroy}->($obj) if $options->{destroy};
255
256			return $result;
257			}
258
259	joko	1.1
260
261			my @indexstack;
262	joko	1.10	sub _var_traverse_mixin_update_old {
263	joko	1.1	my $obj = shift;
264			my $data = shift;
265			my $bool_recursion = shift;
266			if (!$bool_recursion) {
267			@indexstack = ();
268			}
269			my $result;
270
271			# 'ARRAY' does not work!
272			if ((ref $obj) eq 'ARRAY') {
273			#print "ARRAY\n";
274			my $i = 0;
275			foreach (@{$obj}) {
276			push @indexstack, $i;
277			my $ref = ref $_;
278			if ($ref) {
279			#$obj->[$i] = var_mixin($_, $data, 1);
280			var_traverse_mixin_update($_, $data, 1);
281			} else {
282			$obj->[$i] = $_;
283			}
284			pop @indexstack;
285			$i++;
286			}
287			} else {
288			foreach (keys %{$obj}) {
289			push @indexstack, $_;
290			my $ref = ref $obj->{$_};
291			if ($ref) {
292			#$obj->{$_} = var_mixin($obj->{$_}, $data, 1);
293			var_traverse_mixin_update($obj->{$_}, $data, 1);
294			} else {
295			#$obj->{$_} = $obj->{$_};
296			my $evstring = getSlot($data);
297			$obj->{$_} = $evstring;
298
299			}
300			pop @indexstack;
301			}
302			}
303			#return $result;
304			}
305
306	joko	1.10	sub merge_to {
307			_hash2object(@_);
308			# TODO:
309	joko	1.16	# re-implement using CPAN's "Iterate" and/or a modified Hash::Merge.
310	joko	1.2	}
311
312	joko	1.10
313	joko	1.2	# todo: maybe do diff(s) here sometimes!?
314	joko	1.10	sub _hash2object {
315	joko	1.2	my $object = shift;
316			my $data = shift;
317			my $options = shift;
318
319	joko	1.3	#print "hash2object", "\n";
320
321	joko	1.2	# "patch" needed 'cause php passes numerical-indexed-arrays as hash-tables,
322			# this method corrects this
323	joko	1.10	numhash2list($data) if ($options->{php});
324	joko	1.2
325			# utf8-conversion/-encoding (essential for I18N)
326	jonen	1.15	utf8_to_latin($data) if ($options->{utf8});
327	joko	1.2
328			# get fresh object from database
329			# todo:
330			# - handle "locked" objects !!!
331			# - check if already another update occoured (object-revisioning needed!)
332			#my $obj = $self->getObject($oid);
333
334			# mix changes into fresh object and save it back
335	joko	1.10	_hash2object_traverse_mixin($object, $data, 0, $options);
336	joko	1.2
337			# done in core mixin function?
338			#$self->{storage}->update($obj);
339
340			# we should "undef" some objects here to destroy them in memory and enforce reloading when used next time
341			# simulate:
342			#$self->{storage}->disconnect();
343
344			}
345
346			# ------------------------------------
347			# core mixin function
348			# TODO-FEATURE: make this possible in a reverse way: object is empty (no fields) and gets filled up by mixin-data
349
350			# remember keys of structures we are traversing
351			# this is a HACK:
352			# - don't (!!!) "packageglobal" @indexstack
353			# - it will lead to problems with parallelism!
354
355			#my @indexstack;
356
357			# traverse a deeply nested structure, mix in values from given hash, update underlying tangram-object
358	joko	1.10	sub _hash2object_traverse_mixin {
359	joko	1.2	my $object = shift;
360			my $data = shift;
361			my $bool_recursion = shift;
362	joko	1.5	my $options = shift;
363	joko	1.2
364			# clear our key - stack if we are called from user-code (non-recursively)
365			@indexstack = () if (!$bool_recursion);
366
367			my $classname = ref $object;
368			# if ($classname) {
369			# print STDERR "*****************", Dumper(Class::Tangram::attribute_types($classname)), "\n";
370			# }
371
372			# parser: detected OBJECT (a Tangram one?) (reftype == HASH) (assume)
373			# what's exactly done here? hmmm.... it works ;)
374			# maybe a HACK: please try not to use "IntrHash"es, maybe this cannot handle them!!!
375			# extend! check!
376	joko	1.10
377			#print attributes::reftype($object), "\n";
378
379			# V1
380			#if ((attributes::reftype($object) eq 'HASH') && (ref($object) ne 'HASH') && (ref($object) ne 'ARRAY')) {
381			# V2
382			my $reftype = attributes::reftype($object);
383			#print "reftype: '$reftype'", "\n";
384			if ($reftype eq 'HASH') {
385	joko	1.2
386			# print STDERR "===", "reftype: ", attributes::reftype($obj), "\n";
387
388	joko	1.5	my @fields;
389	joko	1.2	# loop through fields of object (Tangram-object)
390	joko	1.5	@fields = keys %{$object};
391
392			# loop through fields of to.be.injected-data (arbitrary Perl-data-structure)
393			@fields = keys %{$data} if $options->{init};
394	jonen	1.6	# @fields = keys %{$data} if $options->{mixin};
395	joko	1.5
396			foreach (@fields) {
397	joko	1.7	my $field = $_;
398			push @indexstack, $field;
399	joko	1.2
400			# determine type of object
401	joko	1.7	my $ref = ref $object->{$field};
402	joko	1.2	# print STDERR "attrname: $_ ATTRref: $ref", "\n";
403			if ($ref) {
404	joko	1.10	_hash2object_traverse_mixin($object->{$field}, $data, 1, $options);
405	joko	1.2	} else {
406	joko	1.10	my $val = ref_slot($data, \@indexstack);
407	joko	1.7
408	joko	1.8	#print Dumper($options);
409	joko	1.7	my $field_target = $field;
410			if (my $pattern = $options->{pattern_strip_key}) {
411			print "pattern: $pattern", "\n";
412			$field_target =~ s/$pattern//;
413			print "field: $field_target", "\n";
414			}
415
416			$object->{$field_target} = $val if defined $val;
417	joko	1.2	}
418			pop @indexstack;
419			}
420
421			# save object to database ...
422			# ... do an update if it already exists, do an insert if it doesn't
423			# my $objectId = $self->{storage}->id($obj);
424			# $logger->debug( __PACKAGE__ . "->saveObjectFromHash_traverse_mixin_update( object $obj objectId $objectId )" );
425			# if ($objectId) {
426			# $self->{storage}->update($obj);
427
428			#print __PACKAGE__ . ":", "\n";
429			#print Dumper($object);
430
431			# } else {
432			# $self->{storage}->insert($obj);
433			# }
434
435			}
436
437			#&& ( ref($obj) ne 'HASH' )
438
439			# loop through entries of array (IntrArray, isn't it?)
440			if ((ref $object) eq 'ARRAY') {
441			# print STDERR "===", "refttype ", attributes::reftype($obj), "\n";
442			my $i = 0;
443			foreach (@{$object}) {
444			push @indexstack, $i;
445			my $ref = ref $_;
446			# print STDERR "attrname: $_ ATTRref: $ref", "\n";
447	jonen	1.6	# if ($ref && $_) {
448			if ($ref) {
449	joko	1.10	_hash2object_traverse_mixin($_, $data, 1, $options);
450	joko	1.2	} else {
451	jonen	1.6	$object->[$i] = $_ if defined $_;
452	joko	1.2	}
453			pop @indexstack;
454			$i++;
455			}
456	joko	1.10
457			=pod
458			# object?
459			} else {
460			print "reference: ", ref $object, "\n";
461			print "reftype: ", $reftype, "\n";
462			die(__PACKAGE__ . "->_hash2object_traverse_mixin: can not handle this!");
463			=cut
464
465	joko	1.2	}
466
467			}
468
469
470	joko	1.10	# ACK's go to Randal L. Schwartz <merlyn@stonehenge.com>
471			# on the website:
472			# This text is copyright by Miller-Freeman, Inc., and is used with their permission.
473			# Further distribution or use is not permitted.
474			# please visit http://www.stonehenge.com/merlyn/UnixReview/col30.html
475			sub deep_copy1 {
476			my $this = shift;
477			if (not ref $this) {
478			$this;
479			} elsif (ref $this eq "ARRAY") {
480			[map deep_copy1($_), @$this];
481			} elsif (ref $this eq "HASH") {
482			+{map { $_ => deep_copy1($this->{$_}) } keys %$this};
483			} elsif (ref $this eq "CODE") {
484			$this;
485			} else { die "deep_copy1 asks: what type is $this?" }
486			#} else { print "deep_copy asks: what type is $this?", "\n"; }
487	joko	1.2	}
488
489	joko	1.10	# ACK's go to Andrew Pitonyak
490			# Copyright 2002, Andrew Pitonyak (perlboy@pitonyak.org)
491			# please visit: http://www.pitonyak.org/code/perl/Pitonyak/DeepCopy.pm.html
492	joko	1.7	sub deep_copy {
493	joko	1.12	Pitonyak::DeepCopy::deep_copy(@_);
494	joko	1.1	}
495	joko	1.12
496	joko	1.1
497			1;
498	joko	1.10	__END__
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