/ 
Wikibase-Datatype-Struct-0.13
River stage one • 1 direct dependent • 3 total dependents
/ Wikibase::Datatype::Struct::Reference

NAME

Wikibase::Datatype::Struct::Reference - Wikibase reference structure serialization.

SYNOPSIS

use Wikibase::Datatype::Struct::Reference qw(obj2struct struct2obj);

my $struct_hr = obj2struct($obj, $base_uri);
my $obj = struct2obj($struct_hr);

DESCRIPTION

This conversion is between objects defined in Wikibase::Datatype and structures serialized via JSON to MediaWiki.

SUBROUTINES

obj2struct

my $struct_hr = obj2struct($obj, $base_uri);

Convert Wikibase::Datatype::Reference instance to structure. $base_uri is base URI of Wikibase system (e.g. http://test.wikidata.org/entity/).

Returns reference to hash with structure.

struct2obj

my $obj = struct2obj($struct_hr);

Convert structure of reference to object.

Returns Wikibase::Datatype::Reference instance.

ERRORS

obj2struct():
        Base URI is required.
        Object doesn't exist.
        Object isn't 'Wikibase::Datatype::Reference'.

EXAMPLE1

use strict;
use warnings;

use Data::Printer;
use Wikibase::Datatype::Reference;
use Wikibase::Datatype::Snak;
use Wikibase::Datatype::Struct::Reference qw(obj2struct);
use Wikibase::Datatype::Value::Item;
use Wikibase::Datatype::Value::String;
use Wikibase::Datatype::Value::Time;

# Object.
# instance of (P31) human (Q5)
my $obj = Wikibase::Datatype::Reference->new(
         'snaks' => [
                 # stated in (P248) Virtual International Authority File (Q53919)
                 Wikibase::Datatype::Snak->new(
                          'datatype' => 'wikibase-item',
                          'datavalue' => Wikibase::Datatype::Value::Item->new(
                                  'value' => 'Q53919',
                          ),
                          'property' => 'P248',
                 ),

                 # VIAF ID (P214) 113230702
                 Wikibase::Datatype::Snak->new(
                          'datatype' => 'external-id',
                          'datavalue' => Wikibase::Datatype::Value::String->new(
                                  'value' => '113230702',
                          ),
                          'property' => 'P214',
                 ),

                 # retrieved (P813) 7 December 2013
                 Wikibase::Datatype::Snak->new(
                          'datatype' => 'time',
                          'datavalue' => Wikibase::Datatype::Value::Time->new(
                                  'value' => '+2013-12-07T00:00:00Z',
                          ),
                          'property' => 'P813',
                 ),
         ],
);

# Get structure.
my $struct_hr = obj2struct($obj, 'http://test.wikidata.org/entity/');

# Dump to output.
p $struct_hr;

# Output:
# \ {
#     snaks         {
#         P214   [
#             [0] {
#                 datatype    "external-id",
#                 datavalue   {
#                     type    "string",
#                     value   113230702
#                 },
#                 property    "P214",
#                 snaktype    "value"
#             }
#         ],
#         P248   [
#             [0] {
#                 datatype    "wikibase-item",
#                 datavalue   {
#                     type    "wikibase-entityid",
#                     value   {
#                         entity-type   "item",
#                         id            "Q53919",
#                         numeric-id    53919
#                     }
#                 },
#                 property    "P248",
#                 snaktype    "value"
#             }
#         ],
#         P813   [
#             [0] {
#                 datatype    "time",
#                 datavalue   {
#                     type    "time",
#                     value   {
#                         after           0,
#                         before          0,
#                         calendarmodel   "http://test.wikidata.org/entity/Q1985727",
#                         precision       11,
#                         time            "+2013-12-07T00:00:00Z",
#                         timezone        0
#                     }
#                 },
#                 property    "P813",
#                 snaktype    "value"
#             }
#         ]
#     },
#     snaks-order   [
#         [0] "P248",
#         [1] "P214",
#         [2] "P813"
#     ]
# }

EXAMPLE2

use strict;
use warnings;

use Wikibase::Datatype::Struct::Reference qw(struct2obj);

# Item structure.
my $struct_hr = {
        'snaks' => {
                'P214' => [{
                        'datatype' => 'external-id',
                        'datavalue' => {
                                'type' => 'string',
                                'value' => '113230702',
                        },
                        'property' => 'P214',
                        'snaktype' => 'value',
                }],
                'P248' => [{
                        'datatype' => 'wikibase-item',
                        'datavalue' => {
                                'type' => 'wikibase-entityid',
                                'value' => {
                                        'entity-type' => 'item',
                                        'id' => 'Q53919',
                                        'numeric-id' => 53919,
                                },
                        },
                        'property' => 'P248',
                        'snaktype' => 'value',
                }],
                'P813' => [{
                        'datatype' => 'time',
                        'datavalue' => {
                                'type' => 'time',
                                'value' => {
                                        'after' => 0,
                                        'before' => 0,
                                        'calendarmodel' => 'http://test.wikidata.org/entity/Q1985727',
                                        'precision' => 11,
                                        'time' => '+2013-12-07T00:00:00Z',
                                        'timezone' => 0,
                                },
                        },
                        'property' => 'P813',
                        'snaktype' => 'value',
                }],
        },
        'snaks-order' => [
                'P248',
                'P214',
                'P813',
        ],
};

# Get object.
my $obj = struct2obj($struct_hr);

# Get value.
my $snaks_ar = $obj->snaks;

# Print out number of snaks.
print "Number of snaks: ".@{$snaks_ar}."\n";

# Output:
# Number of snaks: 3

DEPENDENCIES

Error::Pure, Exporter, Readonly, Wikibase::Datatype::Reference, Wikibase::Datatype::Struct::Utils.

SEE ALSO

Wikibase::Datatype::Struct

Wikibase structure serialization.

Wikibase::Datatype::Reference

Wikibase reference datatype.

REPOSITORY

https://github.com/michal-josef-spacek/Wikibase-Datatype-Struct

AUTHOR

Michal Josef Špaček mailto:skim@cpan.org

http://skim.cz

LICENSE AND COPYRIGHT

© 2020-2024 Michal Josef Špaček

BSD 2-Clause License

VERSION

0.13