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From Knut Arne Bjørndal <>
Subject [lucy-user] Serialization error when inheriting from Lucy::Analysis::Normalizer
Date Mon, 05 May 2014 14:58:25 GMT

I'm implementing a custom normalization analyzer and it would be
convenient to let it inherit from the default implementation, but I'm
having trouble with the serialization and deserialization.

I override dump to add some extra data to the serialized object, which
seems to be the part with the problem.

Minimal test case:
package My::Normalizer;
use base qw( Lucy::Analysis::Normalizer );

sub dump {


Adding this to a schema causes an exception to be throw when the schema
is deserialized:
Can't downcast from Lucy::Object::CharBuf to Lucy::Object::BoolNum
	lucy_Normalizer_load at .../Normalizer.c line 151
	at /usr/lib/perl5/ line 239
	Lucy::Index::Indexer::new('Lucy::Index::Indexer', 'index',
'index.1246/', 'schema', 'Lucy::Plan::Schema=SCALAR(0x2e4fc90)',
'create', 1)

Looking at schema.json a Lucy::Analysis::Normalizer is serialized to:
          "_class": "Lucy::Analysis::Normalizer",
          "case_fold": true,
          "normalization_form": "NFKC",
          "strip_accents": false
while my subclassed instance is serialized to:
          "_class": "My::Normalizer",
          "case_fold": "1",
          "normalization_form": "NFKC",
          "strip_accents": "0"

So it looks like the serializer doesn't correctly handle boolean values
when called from perl?

Knut Arne Bjørndal, Tekniker Easy Connect AS -

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