Convert LogicalType BigDecimal to Json

[gkalogiros-nutmeg]

Hi all,

First of all thank you for the amazing work you have put in, in this library!

I would like some help with the following problem:

As seen below, I am working on a requirement about exposing some data using the Avro serialization format over Rest:

...
final GenericRecord value = stateStoreQuery.get(key);
final byte[] valueBytes = new JsonAvroConverter().convertToJson(value);
final String response = new String(valueBytes);
return ResponseEntity.ok(response);

Almost all data types are getting converted correctly but decimals. I am assuming this is related to the fact that my Avro POJO uses BigDecimals to represent decimal numbers. I know that this is a logical type in Avro rather than a primitive.

For example the number 0.6060 initialized as new BigDecimal("0.6060") comes back as �¬.

What I am trying to detect unsuccessfully so far is whether the cause of the problem is:

• The default instance of ObjectMapper used in JsonGenericRecordReader and it doesn't support the conversion from BigDecimals to Strings.
• The fact that the library does not support Logical types which I doubt as it uses the GenericDatumWriter under the hood.
• I explicitly need to load any logical types given that BigDecimals are encoded as Avro BYTES.

Any help will be much appreciated!

Thanks in advance!

[adityaabhas]

Hi all,

First of all thank you for the amazing work you have put in, in this library!

I would like some help with the following problem:

As seen below, I am working on a requirement about exposing some data using the Avro serialization format over Rest:

...
final GenericRecord value = stateStoreQuery.get(key);
final byte[] valueBytes = new JsonAvroConverter().convertToJson(value);
final String response = new String(valueBytes);
return ResponseEntity.ok(response);

Almost all data types are getting converted correctly but decimals. I am assuming this is related to the fact that my Avro POJO uses BigDecimals to represent decimal numbers. I know that this is a logical type in Avro rather than a primitive.

For example the number 0.6060 initialized as new BigDecimal("0.6060") comes back as �¬.

What I am trying to detect unsuccessfully so far is whether the cause of the problem is:

• The default instance of ObjectMapper used in JsonGenericRecordReader and it doesn't support the conversion from BigDecimals to Strings.
• The fact that the library does not support Logical types which I doubt as it uses the GenericDatumWriter under the hood.
• I explicitly need to load any logical types given that BigDecimals are encoded as Avro BYTES.

Any help will be much appreciated!

Thanks in advance!

Hello Georgios, I also need BigDecimal logical type support. Were you able to progress on this?