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=head1 REGISTRATION INFORMATION |
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Tag 26 |
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Data Item array [classname, constructargs...] |
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Semantics Serialised Perl object with classname and constructor arguments |
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Reference http://cbor.schmorp.de/perl-object |
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Contact Marc A. Lehmann <cbor@schmorp.de> |
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=head1 DESCRIPTION |
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The perl-object tag in CBOR can be used to serialise Perl 5 objects into |
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CBOR. |
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The tagged value must be a CBOR array with at least one element. The first |
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element specifies a classname to use in Perl (it can, but does not need to |
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be a string - the stringified form will be used as classname). |
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The encoder and decoder should serialise/deserialise the object using the |
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Types::Serialiser object serialisation protocol. For this, the object's |
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class must have FREEZE and THAW methods that are called like this: |
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@constructargs = $object->FREEZE ("CBOR"); |
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$object = $class->THAW ("CBOR", @constructargs); |
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If the class or method is currently not available, the decoder may try to |
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load a Perl module of the same name and retry the method call. |
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=head1 EXAMPLES |
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Example of a hypothetical My::DateTime representation using a unix |
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timestamp: |
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26(["My::DateTime", 12345678]) |
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d8 1a # tag(26) |
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82 # array(2) |
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6c # text(12) |
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4d793a3a4461746554696d65 # "My::DateTime" |
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1a 00bc614e # unsigned(12345678) |
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Example of the corresponding FREEZE method: |
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sub My::DateTime::FREEZE { |
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my ($self, $model) = @_; |
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$self->as_seconds |
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} |
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Example of the corresponding THAW method: |
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sub My::DateTime::THAW { |
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my ($class, $model, $seconds) = @_; |
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$class->new_from_seconds ($seconds) |
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} |
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