our $AUTHORITY = 'cpan:MATY';
$PMLTQ::Relation::TreeIterator::VERSION = '2.0.0'; # TRIAL
# ABSTRACT: Evaluates condition on the whole tree of given node
use 5.006;
use strict;
use Carp;
use constant CONDITIONS=>0;
use constant TREE=>1;
use constant NODE=>2;
use constant FILE=>3;
sub new {
my ($class,$conditions,$root,$fsfile)=@_;
croak "usage: $class->new(sub{...})" unless ref($conditions) eq 'CODE';
return bless [$conditions,$root,undef,$fsfile],$class;
}
sub clone {
my ($self)=@_;
return bless [$self->[CONDITIONS],$self->[NODE],$self->[TREE],$self->[FILE]], ref($self);
}
sub start {
my ($self)=@_;
my $root = $self->[NODE] = $self->[TREE];
return ($root && $self->[CONDITIONS]->($root,$self->[FILE])) ? $root : ($root && $self->next);
}
sub next {
my ($self)=@_;
my $conditions=$self->[CONDITIONS];
my $n=$self->[NODE];
my $fsfile=$self->[FILE];
while ($n) {
$n = $n->following;
last if $conditions->($n,$fsfile);
}
return $self->[NODE]=$n;
}
sub node {
return $_[0]->[NODE];
}
sub file {
return $_[0]->[FILE];
}
sub set_file {
$_[0]->[FILE] = $_[1];
}
sub set_tree {
$_[0]->[TREE] = $_[1];
}
sub reset {
my ($self)=@_;
$self->[NODE]=undef;
}
1; # End of PMLTQ::Relation::TreeIterator
__END__
=pod
=encoding UTF-8
=head1 NAME
PMLTQ::Relation::TreeIterator - Evaluates condition on the whole tree of given node
=head1 VERSION
version 2.0.0
=head1 AUTHORS
=over 4
=item *
Petr Pajas <pajas@ufal.mff.cuni.cz>
=item *
Jan Štěpánek <stepanek@ufal.mff.cuni.cz>
=item *
Michal Sedlák <sedlak@ufal.mff.cuni.cz>
=item *
Matyáš Kopp <matyas.kopp@gmail.com>
=back
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2015 by Institute of Formal and Applied Linguistics (http://ufal.mff.cuni.cz).
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