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package Catmandu::Importer::Multi;
use Catmandu::Sane;
our $VERSION = '1.2024';
use Catmandu::Util qw(is_string);
use Catmandu;
use Catmandu::MultiIterator;
use Moo;
use namespace::clean;
with 'Catmandu::Importer';
has importers => (
is => 'ro',
default => sub {[]},
coerce => sub {
my $importers = $_[0];
return [
map {
if (is_string($_)) {
Catmandu->importer($_);
}
else {
$_;
}
} @$importers
];
},
);
sub generator {
my ($self) = @_;
sub {
state $generators = [map {$_->generator} @{$self->importers}];
while (@$generators) {
my $data = $generators->[0]->();
return $data if defined $data;
shift @$generators;
}
return;
};
}
1;
__END__
=pod
=head1 NAME
Catmandu::Importer::Multi - Chain multiple importers together
=head1 SYNOPSIS
use Catmandu::Importer::Multi;
my $importer = Catmandu::Importer::Multi->new(importers => [
Catmandu::Importer::Mock->new,
Catmandu::Importer::Mock->new,
]);
my $importer = Catmandu::Importer::Multi->new(
'importer1',
'importer2',
);
# return all the items of each importer in turn
$importer->each(sub {
# ...
});
=head1 METHODS
Every L<Catmandu::Importer> is a L<Catmandu::Iterable> all its methods are
inherited.
=cut
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