File Coverage

blib/lib/Geo/JSON.pm

Criterion	Covered	Total	%
statement	38	38	100.0
branch	5	8	62.5
condition			n/a
subroutine	11	11	100.0
pod	3	3	100.0
total	57	60	95.0

package Geo::JSON;

our $VERSION = '0.006'; # VERSION

# ABSTRACT: Perl OO interface for geojson

use strict;
use warnings;
use Carp;

use JSON qw/ decode_json /;
use List::Util qw/ first /;

use constant GEOMETRY_OBJECTS => [
    qw/ Point MultiPoint LineString MultiLineString Polygon MultiPolygon GeometryCollection /
];
use constant GEOJSON_OBJECTS => [    #
    @{ +GEOMETRY_OBJECTS }, qw/ Feature FeatureCollection /
];


our $json = JSON->new->utf8->convert_blessed(1);


sub from_json {
    my ( $class, $json ) = @_;

    my $data = decode_json($json);

    croak "from_json requires a JSON object (hashref)"
        unless ref $data eq 'HASH';

    return $class->load($data);
}


sub load {
    my ( $class, $data ) = @_;

    my $type = delete $data->{type}
        or croak "Invalid JSON data: no type specified";

    my $geo_json_class = 'Geo::JSON::' . $type;

    croak "Invalid type '$type'"
        unless first { $type eq $_ } @{ +GEOJSON_OBJECTS };

    eval "require $geo_json_class";

    return $geo_json_class->new($data);
}


sub codec {
    my $class = shift;

    my $orig = $json;
    $json = shift if @_;

    return $orig;
}


1;

__END__