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package Algorithm::Dependency::Source::Invert;
# ABSTRACT: Logically invert a source
#pod =pod
#pod
#pod =head1 SYNOPSIS
#pod
#pod my $inverted = Algorithm::Dependency::Source::Invert->new( $source );
#pod
#pod =head1 DESCRIPTION
#pod
#pod This class creates a source from another source, but with all dependencies
#pod reversed.
#pod
#pod =cut
use 5.005;
use strict;
use Params::Util '_INSTANCE';
use Algorithm::Dependency::Source::HoA ();
our $VERSION = '1.112';
our @ISA = 'Algorithm::Dependency::Source::HoA';
#####################################################################
# Constructor
sub new {
my $class = shift;
my $source = _INSTANCE(shift, 'Algorithm::Dependency::Source') or return undef;
# Derive a HoA from the original source
my @items = $source->items;
my %hoa = map { $_->id => [ ] } @items;
foreach my $item ( @items ) {
my $id = $item->id;
my @deps = $item->depends;
foreach my $dep ( @deps ) {
push @{ $hoa{$dep} }, $id;
}
}
# Hand off to the parent class
$class->SUPER::new( \%hoa );
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Algorithm::Dependency::Source::Invert - Logically invert a source
=head1 VERSION
version 1.112
=head1 SYNOPSIS
my $inverted = Algorithm::Dependency::Source::Invert->new( $source );
=head1 DESCRIPTION
This class creates a source from another source, but with all dependencies
reversed.
=head1 SEE ALSO
L<Algorithm::Dependency::Source>, L<Algorithm::Dependency::Source::HoA>
=head1 SUPPORT
Bugs may be submitted through L<the RT bug tracker|https://rt.cpan.org/Public/Dist/Display.html?Name=Algorithm-Dependency>
(or L<bug-Algorithm-Dependency@rt.cpan.org|mailto:bug-Algorithm-Dependency@rt.cpan.org>).
=head1 AUTHOR
Adam Kennedy <adamk@cpan.org>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2003 by Adam Kennedy.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
|
