class Avromatic::IO::DatumWriter
Subclass DatumWriter
to use additional information about union member index.
Public Instance Methods
Source
# File lib/avromatic/io/datum_writer.rb, line 8 def write_union(writers_schema, datum, encoder) optional = writers_schema.schemas.first.type_sym == :null if datum.is_a?(Avromatic::IO::UnionDatum) index_of_schema = datum.member_index # Avromatic does not treat the null of an optional field as part of the union index_of_schema += 1 if optional datum = datum.datum elsif optional && writers_schema.schemas.size == 2 # Optimize for the common case of a union that's just an optional field index_of_schema = datum.nil? ? 0 : 1 else index_of_schema = writers_schema.schemas.find_index do |schema| Avro::Schema.validate(schema, datum) end end raise Avro::IO::AvroTypeError.new(writers_schema, datum) unless index_of_schema encoder.write_long(index_of_schema) write_data(writers_schema.schemas[index_of_schema], datum, encoder) end