/**
* @param $writers_schema
* @param $datum
* @param $encoder
* @throws AvroException
* @throws AvroIOTypeException
* @throws AvroSchemaParseException
*/
private function write_union($writers_schema, $datum, $encoder)
{
$datum_schema_index = -1;
$datum_schema = null;
foreach ($writers_schema->schemas() as $index => $schema) {
if (AvroSchema::is_valid_datum($schema, $datum)) {
$datum_schema_index = $index;
$datum_schema = $schema;
break;
}
}
if (is_null($datum_schema)) {
throw new AvroIOTypeException($writers_schema, $datum);
}
$encoder->write_long($datum_schema_index);
$this->write_data($datum_schema, $datum, $encoder);
}
