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lib/Map/Tube/Beijing.pm  view on Meta::CPAN

my %nametypes = map { $_ => 1 } qw(alt); # The permissible alternative nametypes. In our case, just 'alt'

has xml      => ( is  => 'ro', lazy => 1, default => sub { return dist_file('Map-Tube-Beijing', 'beijing-map.xml') } );
has nametype => ( is  => 'ro', default => '',
				  isa => sub { die __PACKAGE__ . ": ERROR: Invalid nametype for constructor: '$_[0]'" unless ( ( $_[0] eq '') || exists($nametypes{ $_[0] } ) ) },
                );

with 'Map::Tube';

before _validate_map_structure => sub {
  $_[1] = _relocate_alternatives( $_[1], '_' . $_[0]->{nametype} ) if ( exists( $_[0]->{nametype}) && ( $_[0]->{nametype} ne '' ) );
  $_[1] = _remove_alternatives( $_[1] );
};

sub _relocate_alternatives {
  my( $branch, $suffix ) = @_;
  for my $key( keys %{ $branch } ) {
    if ( ref( $branch->{$key} ) eq 'HASH' ) {
	  $branch->{$key} = _relocate_alternatives( $branch->{$key}, $suffix );
    } elsif ( ( ref( $branch->{$key} ) eq '' ) && ( $key eq ( 'name' . $suffix ) ) ) {
      $branch->{'name'} = $branch->{ 'name' . $suffix };
    } elsif ( ref( $branch->{$key} ) eq 'ARRAY' ) {
	  $branch->{$key} = [ map { _relocate_alternatives( $_, $suffix ) } @{ $branch->{$key} } ];
    }
  }
  return $branch;
}

sub _remove_alternatives {
  my($branch) = @_;
  for my $key( keys %{ $branch } ) {
    if ( ref( $branch->{$key} ) eq 'HASH' ) {
	  $branch->{$key} = _remove_alternatives( $branch->{$key} );