/usr/share/perl5/Class/DBI/Loader/Generic.pm is in libclass-dbi-loader-perl 0.34-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 | package Class::DBI::Loader::Generic;
use strict;
use vars qw($VERSION);
use Carp;
use Lingua::EN::Inflect;
$VERSION = '0.30';
=head1 NAME
Class::DBI::Loader::Generic - Generic Class::DBI::Loader Implementation.
=head1 SYNOPSIS
See L<Class::DBI::Loader>
=head1 DESCRIPTION
=head1 METHODS
=head2 new %args
See the documentation for C<Class::DBI::Loader-E<gt>new()>
=cut
sub new {
my ( $class, %args ) = @_;
if ( $args{debug} ) {
no strict 'refs';
*{"$class\::debug"} = sub { 1 };
}
my $additional = $args{additional_classes} || [];
$additional = [$additional] unless ref $additional eq 'ARRAY';
my $additional_base = $args{additional_base_classes} || [];
$additional_base = [$additional_base]
unless ref $additional_base eq 'ARRAY';
my $left_base = $args{left_base_classes} || [];
$left_base = [$left_base] unless ref $left_base eq 'ARRAY';
my $self = bless {
_datasource =>
[ $args{dsn}, $args{user}, $args{password}, $args{options} ],
_namespace => $args{namespace},
_additional => $additional,
_additional_base => $additional_base,
_left_base => $left_base,
_constraint => $args{constraint} || '.*',
_exclude => $args{exclude},
_relationships => $args{relationships},
_inflect => $args{inflect},
_require => $args{require},
_require_warn => $args{require_warn},
CLASSES => {},
}, $class;
warn qq/\### START Class::DBI::Loader dump ###\n/ if $self->debug;
$self->_load_classes;
$self->_relationships if $self->{_relationships};
warn qq/\### END Class::DBI::Loader dump ###\n/ if $self->debug;
# disconnect to avoid confusion.
foreach my $table ($self->tables) {
$self->find_class($table)->db_Main->disconnect;
}
$self;
}
=head3 find_class
Returns a tables class.
my $class = $loader->find_class($table);
=cut
sub find_class {
my ( $self, $table ) = @_;
return $self->{CLASSES}->{$table};
}
=head3 classes
Returns a sorted list of classes.
my $@classes = $loader->classes;
=cut
sub classes {
my $self = shift;
return sort values %{ $self->{CLASSES} };
}
=head3 debug
Overload to enable debug messages.
=cut
sub debug { 0 }
=head3 tables
Returns a sorted list of tables.
my @tables = $loader->tables;
=cut
sub tables {
my $self = shift;
return sort keys %{ $self->{CLASSES} };
}
# Overload in your driver class
sub _db_class { croak "ABSTRACT METHOD" }
# Setup has_a and has_many relationships
sub _has_a_many {
my ( $self, $table, $column, $other ) = @_;
my $table_class = $self->find_class($table);
my $other_class = $self->find_class($other);
warn qq/\# Has_a relationship\n/ if $self->debug;
warn qq/$table_class->has_a( '$column' => '$other_class' );\n\n/
if $self->debug;
$table_class->has_a( $column => $other_class );
my ($table_class_base) = $table_class =~ /.*::(.+)/;
my $plural = Lingua::EN::Inflect::PL( lc $table_class_base );
$plural = $self->{_inflect}->{ lc $table_class_base }
if $self->{_inflect}
and exists $self->{_inflect}->{ lc $table_class_base };
warn qq/\# Has_many relationship\n/ if $self->debug;
warn qq/$other_class->has_many( '$plural' => '$table_class' );\n\n/
if $self->debug;
$other_class->has_many( $plural => $table_class );
}
# Load and setup classes
sub _load_classes {
my $self = shift;
my @tables = $self->_tables();
my $db_class = $self->_db_class();
my $additional = join '', map "use $_;\n", @{ $self->{_additional} };
my $additional_base = join '', map "use base '$_';\n",
@{ $self->{_additional_base} };
my $left_base = join '', map "use base '$_';\n", @{ $self->{_left_base} };
my $constraint = $self->{_constraint};
my $exclude = $self->{_exclude};
my $use_connection = $Class::DBI::VERSION >= 0.96;
foreach my $table (@tables) {
next unless $table =~ /$constraint/;
next if ( defined $exclude && $table =~ /$exclude/ );
my $class = $self->_table2class($table);
warn qq/\# Initializing table "$table" as "$class"\n/ if $self->debug;
{
no strict 'refs';
@{"$class\::ISA"} = $db_class;
}
if ($use_connection) {
$class->connection(@{$self->{_datasource}});
} else {
$class->set_db( Main => @{ $self->{_datasource} } );
}
$class->set_up_table($table);
$self->{CLASSES}->{$table} = $class;
my $code = "package $class;$additional_base$additional$left_base";
warn qq/$code/ if $self->debug;
warn qq/$class->table('$table');\n\n/ if $self->debug;
eval $code;
croak qq/Couldn't load additional classes "$@"/ if $@;
{
no strict 'refs';
unshift @{"$class\::ISA"}, $_ foreach ( @{ $self->{_left_base} } );
}
if ($self->{_require}) {
eval "require $class";
if ($self->{_require_warn} && $@ && $@ !~ /Can't locate/) {
warn;
}
}
}
}
# Find and setup relationships
sub _relationships {
my $self = shift;
foreach my $table ( $self->tables ) {
my $dbh = $self->find_class($table)->db_Main;
if ( my $sth = $dbh->foreign_key_info( '', '', '', '', '', $table ) ) {
for my $res ( @{ $sth->fetchall_arrayref( {} ) } ) {
my $column = $res->{FK_COLUMN_NAME};
my $other = $res->{UK_TABLE_NAME};
eval { $self->_has_a_many( $table, $column, $other ) };
warn qq/\# has_a_many failed "$@"\n\n/ if $@ && $self->debug;
}
}
}
}
# Make a class from a table
sub _table2class {
my ( $self, $table ) = @_;
my $namespace = $self->{_namespace} || "";
$namespace =~ s/(.*)::$/$1/;
my $subclass = join '', map ucfirst, split /[\W_]+/, $table;
my $class = $namespace ? "$namespace\::" . $subclass : $subclass;
}
# Overload in driver class
sub _tables { croak "ABSTRACT METHOD" }
=head1 SEE ALSO
L<Class::DBI::Loader>, L<Class::DBI::Loader::mysql>, L<Class::DBI::Loader::Pg>,
L<Class::DBI::Loader::SQLite>
=cut
1;
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