cpan/Tangram/PerlDump.pm

# (c) Sound Object Logic 2000-2001

# Copyright 1999-2001 Gabor Herr. All rights reserved.
# This program is free software; you can redistribute it and/or modify it
# under the same terms as Perl itself

# Modified 29dec2000 by Jean-Louis Leroy
# replaced save() by get_exporter()
# fixed reschema(): $def->{dumper} was not set when using abbreviated forms

use strict;

use Tangram::Scalar;

package Tangram::PerlDump;

use base qw( Tangram::String );
use Data::Dumper;

$Tangram::Schema::TYPES{perl_dump} = Tangram::PerlDump->new;

my $DumpMeth = (defined &Data::Dumper::Dumpxs) ? 'Dumpxs' : 'Dump';

sub reschema {
  my ($self, $members, $class, $schema) = @_;

  if (ref($members) eq 'ARRAY') {
    # short form
    # transform into hash: { fieldname => { col => fieldname }, ... }
    $_[1] = map { $_ => { col => $schema->{normalize}->($_, 'colname') } } @$members;
  }
    
  for my $field (keys %$members) {
    my $def = $members->{$field};
    my $refdef = ref($def);
    
    unless ($refdef) {
      # not a reference: field => field
      $def = $members->{$field} = { col => $schema->{normalize}->(($def || $field), 'colname') };
          $refdef = ref($def);
    }

    die ref($self), ": $class\:\:$field: unexpected $refdef"
      unless $refdef eq 'HASH' or $refdef eq 'Tangram::PerlDump';
        
    $def->{col} ||= $schema->{normalize}->($field, 'colname');
    $def->{sql} ||= 'VARCHAR(255)';
    $def->{indent} ||= 0;
    $def->{terse} ||= 1;
    $def->{purity} ||= 0;
    $def->{dumper} ||= sub {

      # remember settings
      $def->{cache}->{indent}  = $Data::Dumper::Indent;
      $def->{cache}->{terse}   = $Data::Dumper::Terse;
      $def->{cache}->{purity}  = $Data::Dumper::Purity;
      $def->{cache}->{varname} = $Data::Dumper::Varname;

      $Data::Dumper::Indent = $def->{indent};
      $Data::Dumper::Terse  = $def->{terse};
      $Data::Dumper::Purity = $def->{purity};
      $Data::Dumper::Varname = '_t::v';
      my $dump = Data::Dumper->$DumpMeth([@_], []);
      
      # restore settings
      $Data::Dumper::Indent  = $def->{cache}->{indent};
      $Data::Dumper::Terse   = $def->{cache}->{terse};
      $Data::Dumper::Purity  = $def->{cache}->{purity};
      $Data::Dumper::Varname = $def->{cache}->{varname};

      return $dump;

    };
  }

  return keys %$members;
}

sub get_importer
{
        my ($self, $context) = @_;
        return "\$obj->{$self->{name}} = eval shift \@\$row";
  }

sub get_exporter
  {
        my ($self, $context) = @_;
        my $field = $self->{name};

        return sub {
          my ($obj, $context) = @_;
          $self->{dumper}->($obj->{$field});
        };
  }

sub save {
  my ($self, $cols, $vals, $obj, $members, $storage) = @_;
  
  my $dbh = $storage->{db};
  
  foreach my $member (keys %$members) {
    my $memdef = $members->{$member};
    
    next if $memdef->{automatic};
    
    push @$cols, $memdef->{col};
    push @$vals, $dbh->quote(&{$memdef->{dumper}}($obj->{$member}));
  }
}

1;
1	# (c) Sound Object Logic 2000-2001
2
3	# Copyright 1999-2001 Gabor Herr. All rights reserved.
4	# This program is free software; you can redistribute it and/or modify it
5	# under the same terms as Perl itself
6
7	# Modified 29dec2000 by Jean-Louis Leroy
8	# replaced save() by get_exporter()
9	# fixed reschema(): $def->{dumper} was not set when using abbreviated forms
10
11	use strict;
12
13	use Tangram::Scalar;
14
15	package Tangram::PerlDump;
16
17	use base qw( Tangram::String );
18	use Data::Dumper;
19
20	$Tangram::Schema::TYPES{perl_dump} = Tangram::PerlDump->new;
21
22	my $DumpMeth = (defined &Data::Dumper::Dumpxs) ? 'Dumpxs' : 'Dump';
23
24	sub reschema {
25	my ($self, $members, $class, $schema) = @_;
26
27	if (ref($members) eq 'ARRAY') {
28	# short form
29	# transform into hash: { fieldname => { col => fieldname }, ... }
30	$_[1] = map { $_ => { col => $schema->{normalize}->($_, 'colname') } } @$members;
31	}
32
33	for my $field (keys %$members) {
34	my $def = $members->{$field};
35	my $refdef = ref($def);
36
37	unless ($refdef) {
38	# not a reference: field => field
39	$def = $members->{$field} = { col => $schema->{normalize}->(($def \|\| $field), 'colname') };
40	$refdef = ref($def);
41	}
42
43	die ref($self), ": $class\:\:$field: unexpected $refdef"
44	unless $refdef eq 'HASH' or $refdef eq 'Tangram::PerlDump';
45
46	$def->{col} \|\|= $schema->{normalize}->($field, 'colname');
47	$def->{sql} \|\|= 'VARCHAR(255)';
48	$def->{indent} \|\|= 0;
49	$def->{terse} \|\|= 1;
50	$def->{purity} \|\|= 0;
51	$def->{dumper} \|\|= sub {
52
53	# remember settings
54	$def->{cache}->{indent} = $Data::Dumper::Indent;
55	$def->{cache}->{terse} = $Data::Dumper::Terse;
56	$def->{cache}->{purity} = $Data::Dumper::Purity;
57	$def->{cache}->{varname} = $Data::Dumper::Varname;
58
59	$Data::Dumper::Indent = $def->{indent};
60	$Data::Dumper::Terse = $def->{terse};
61	$Data::Dumper::Purity = $def->{purity};
62	$Data::Dumper::Varname = '_t::v';
63	my $dump = Data::Dumper->$DumpMeth([@_], []);
64
65	# restore settings
66	$Data::Dumper::Indent = $def->{cache}->{indent};
67	$Data::Dumper::Terse = $def->{cache}->{terse};
68	$Data::Dumper::Purity = $def->{cache}->{purity};
69	$Data::Dumper::Varname = $def->{cache}->{varname};
70
71	return $dump;
72
73	};
74	}
75
76	return keys %$members;
77	}
78
79	sub get_importer
80	{
81	my ($self, $context) = @_;
82	return "\$obj->{$self->{name}} = eval shift \@\$row";
83	}
84
85	sub get_exporter
86	{
87	my ($self, $context) = @_;
88	my $field = $self->{name};
89
90	return sub {
91	my ($obj, $context) = @_;
92	$self->{dumper}->($obj->{$field});
93	};
94	}
95
96	sub save {
97	my ($self, $cols, $vals, $obj, $members, $storage) = @_;
98
99	my $dbh = $storage->{db};
100
101	foreach my $member (keys %$members) {
102	my $memdef = $members->{$member};
103
104	next if $memdef->{automatic};
105
106	push @$cols, $memdef->{col};
107	push @$vals, $dbh->quote(&{$memdef->{dumper}}($obj->{$member}));
108	}
109	}
110
111	1;
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