Mungle/Transform/Deep.pm

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