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 base 'App::Ack::Filter';
sub new {
my ( $class ) = @_;
return bless {
groups => {},
ungrouped => [],
}, $class;
}
sub filter {
my ( $self, $resource ) = @_;
for my $group (values %{$self->{'groups'}}) {
if ($group->filter($resource)) {
return 1;
}
}
for my $filter (@{$self->{'ungrouped'}}) {
if ($filter->filter($resource)) {
return 1;
}
}
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 ) = @_;
my $ungrouped = $self->{'ungrouped'};
return join(', ', map { "($_)" } @{$ungrouped});
}
1;