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lib/Algorithm/Dependency.pm  view on Meta::CPAN

#pod 'selected', acted upon, installed, or whatever. If another item depends on one
#pod in this list, we don't have to include it in the output of the C<schedule> or
#pod C<depends> methods.
#pod
#pod =item ignore_orphans => 1
#pod
#pod Normally, the item source is expected to be largely perfect and error free.
#pod An 'orphan' is an item name that appears as a dependency of another item, but
#pod doesn't exist, or has been deleted.
#pod
#pod By providing the C<ignore_orphans> flag, orphans are simply ignored. Without
#pod the C<ignore_orphans> flag, an error will be returned if an orphan is found.
#pod
#pod =back
#pod
#pod The C<new> constructor returns a new Algorithm::Dependency object on success,
#pod or C<undef> on error.
#pod
#pod =cut

sub new {
	my $class  = shift;
	my %args   = @_;
	my $source = _INSTANCE($args{source}, 'Algorithm::Dependency::Source')
		or return undef;

	# Create the object
	my $self = bless {
		source   => $source, # Source object
		selected => {},
		}, $class;

	# Were we given the 'ignore_orphans' flag?
	if ( $args{ignore_orphans} ) {
		$self->{ignore_orphans} = 1;
	}

	# Done, unless we have been given some selected items
	_ARRAY($args{selected}) or return $self;

	# Make sure each of the selected ids exists
	my %selected = ();
	foreach my $id ( @{ $args{selected} } ) {

lib/Algorithm/Dependency.pm  view on Meta::CPAN

'selected', acted upon, installed, or whatever. If another item depends on one
in this list, we don't have to include it in the output of the C<schedule> or
C<depends> methods.

=item ignore_orphans => 1

Normally, the item source is expected to be largely perfect and error free.
An 'orphan' is an item name that appears as a dependency of another item, but
doesn't exist, or has been deleted.

By providing the C<ignore_orphans> flag, orphans are simply ignored. Without
the C<ignore_orphans> flag, an error will be returned if an orphan is found.

=back

The C<new> constructor returns a new Algorithm::Dependency object on success,
or C<undef> on error.

=head2 source

The C<source> method retrieves the L<Algorithm::Dependency::Source> object
for the algorithm context.