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package App::Ack::Filter::Collection;
=head1 NAME
App::Ack::Filter::Collection
=head1 DESCRIPTION
The Ack::Filter::Collection class can contain filters and internally sort
them into groups. The groups can then be optimized for faster filtering.
Filters are grouped and replaced by a fast hash lookup. This leads to
improved performance when many such filters are active, like when using
the C<--known> command line option.
=cut
use strict;
use warnings;
use parent 'App::Ack::Filter';
sub new {
my ( $class ) = @_;
return bless {
groups => {},
ungrouped => [],
}, $class;
}
sub filter {
my ( $self, $file ) = @_;
for my $group (values %{$self->{groups}}) {
return 1 if $group->filter($file);
}
for my $filter (@{$self->{ungrouped}}) {
return 1 if $filter->filter($file);
}
return 0;
}
sub add {
my ( $self, $filter ) = @_;
if (exists $filter->{'groupname'}) {
my $group = ($self->{groups}->{$filter->{groupname}} ||= $filter->create_group());
$group->add($filter);
}
else {
push @{$self->{'ungrouped'}}, $filter;
}
return;
}
sub inspect {
my ( $self ) = @_;
return ref($self) . " - $self";
}
sub to_string {
my ( $self ) = @_;
return join(', ', map { "($_)" } @{$self->{ungrouped}});
}
1;
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