Here are some examples:

{

“namespace”: “test.avro”,

“name”: “FacebookUser”,

“type”: “record”,

“fields”: [

{“name”: “name”, “type”: “string”},

{“name”: “num_likes”, “type”: “int”},

{“name”: “num_photos”, “type”: “int”},

{“name”: “num_groups”, “type”: “int”},

    {"name": "friends", "type": "array", "items": "FacebookUser"} 
]

}

 

First, create a ByteArrayInputStream with the avro data as the input

Then, create DecoderFactory and then get the DirectBinaryDecoder from the factory

Next, instantiate the GenericDatumReader with the Avro schema

Now we can use the above reader to read the deserialized avro data from the decoder

 

Schema schema = Schema.parse(new File(“PositionList.avsc”));

ByteArrayInputStream bai = new ByteArrayInputStream(bytes);

DecoderFactory decoderFactory = new DecoderFactory();

Decoder decoder = DecoderFactory.get().directBinaryDecoder(bai, null);

GenericDatumReader<GenericRecord> reader = new GenericDatumReader<GenericRecord>(schema);

GenericRecord rec = (GenericRecord)reader.read(null, decoder);