| 1 |
=head1 REGISTRATION INFORMATION |
| 2 |
|
| 3 |
Tag <unassigned> |
| 4 |
Data Item array [classname, constructargs...] |
| 5 |
Semantics Serialised Perl object with classname and constructor arguments |
| 6 |
Reference http://cbor.schmorp.de/perl-object |
| 7 |
Contact Marc A. Lehmann <cbor@schmorp.de> |
| 8 |
|
| 9 |
=head1 DESCRIPTION |
| 10 |
|
| 11 |
The perl-object tag in CBOR can be used to serialise Perl 5 objects into |
| 12 |
CBOR. |
| 13 |
|
| 14 |
The tagged value must be a CBOR array with at least one element. The first |
| 15 |
element specifies a classname to use in Perl (it can, but does not need |
| 16 |
to be a string). |
| 17 |
|
| 18 |
The encoder and decoder should serialise/deserialise the object using the |
| 19 |
Types::Serialiser object serialisation protocol. For this, the object's |
| 20 |
class must have FREEZE and THAW methods that are called like this: |
| 21 |
|
| 22 |
@constructargs = $object->FREEZE ("CBOR"); |
| 23 |
$object = $class->THAW ("CBOR", @constructargs); |
| 24 |
|
| 25 |
If the class or method is currently not available, the decoder may try to |
| 26 |
load a Perl module of the same name and retry the method call. |
| 27 |
|
| 28 |
=head1 EXAMPLES |
| 29 |
|
| 30 |
Example of a hypothetical My::DateTime representation using a unix |
| 31 |
timestamp: |
| 32 |
|
| 33 |
tag(["My::DateTime", 12345678]) |
| 34 |
|
| 35 |
Example of the corresponding FREEZE method: |
| 36 |
|
| 37 |
sub My::DateTime::FREEZE { |
| 38 |
my ($self, $model) = @_; |
| 39 |
|
| 40 |
$self->as_seconds |
| 41 |
} |
| 42 |
|
| 43 |
Example of the corresponding THAW method: |
| 44 |
|
| 45 |
sub My::DateTime::THAW { |
| 46 |
my ($class, $model, $seconds) = @_; |
| 47 |
|
| 48 |
$class->new_from_seconds ($seconds) |
| 49 |
} |
| 50 |
|
