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package Tangram::Type;
use strict;
use Carp;
my %instances;
sub instance
{
my $pkg = shift;
return $instances{$pkg} ||= bless { }, $pkg;
}
sub new {
my $inv = shift;
return $inv->instance(@_);
}
sub reschema
{
}
sub members
{
my ($self, $members) = @_;
keys %$members;
}
sub query_expr
{
}
sub remote_expr
{
}
sub erase
{
}
sub read_data
{
my ($self, $row) = @_;
shift @$row;
}
sub read
{
my ($self, $row, $obj, $members) = @_;
foreach my $key (keys %$members)
{
$obj->{$key} = $self->read_data($row)
}
}
sub prefetch
{
}
sub expr
{
return Tangram::Expr->new( @_ );
}
sub get_exporters
{
my ($self, $fields, $context) = @_;
return map { $fields->{$_}->get_exporter($context) } keys %$fields;
}
sub get_importer
{
my $type = ref shift();
die "$type does not implement new get_importer method";
}
sub get_exporter
{
my $type = ref shift();
die "$type does not implement new get_exporter method";
}
sub get_export_cols
{
()
}
sub get_intrusions {
}
1;
|
