File Coverage

blib/lib/GIS/Distance/Formula.pm

Criterion	Covered	Total	%
statement	34	38	89.4
branch	4	8	50.0
condition	2	5	40.0
subroutine	9	10	90.0
pod	0	4	0.0
total	49	65	75.3

package GIS::Distance::Formula;
use 5.008001;
use strictures 2;
our $VERSION = '0.19';

use Class::Measure::Length qw( length );
use Carp qw( croak );
use Scalar::Util qw( blessed );
use namespace::clean;

our $SELF;

sub new {
    my $class = shift;

    my $args = $class->BUILDARGS( @_ );

    my $self = bless { %$args }, $class;
    $self->{code} = $class->can('_distance');
    $self->BUILD() if $self->can('BUILD');

    return $self;
}

sub BUILDARGS {
    my $class = shift;

    return shift
        if @_==1 and ref($_[0]) eq 'HASH';

    return { @_ };
}

sub distance {
    my $self = shift;

    my @coords;
    foreach my $coord (@_) {
        if ((blessed($coord)||'') eq 'Geo::Point') {
            push @coords, $coord->latlong();
            next;
        }

        push @coords, $coord;
    }

    croak 'Invalid arguments passsed to distance()'
        if @coords!=4;

    local $SELF = $self;

    return length(
        $self->{code}->( @coords ),
        'km',
    );
}

sub distance_metal {
    my $self = shift;
    return $self->{code}->( @_ );
}

1;
__END__