Examples with JsonDecoder org.apache.avro.io.JsonDecoder used on opensource projects

Example 6 with JsonDecoder

use of org.apache.avro.io.JsonDecoder in project voldemort by voldemort.

the class VoldemortClientShell method parseObject.

public static Object parseObject(SerializerDefinition serializerDef, String argStr, MutableInt parsePos, PrintStream errorStream) {
    Object obj = null;
    try {
        // TODO everything is read as json string now..
        JsonReader jsonReader = new JsonReader(new StringReader(argStr));
        obj = jsonReader.read();
        // mark how much of the original string, we blew through to
        // extract the avrostring.
        parsePos.setValue(jsonReader.getCurrentLineOffset() - 1);
        if (StoreDefinitionUtils.isAvroSchema(serializerDef.getName())) {
            // TODO Need to check all the avro siblings work
            // For avro, we hack and extract avro key/value as a string,
            // before we do the actual parsing with the schema
            String avroString = (String) obj;
            // From here on, this is just normal avro parsing.
            Schema latestSchema = Schema.parse(serializerDef.getCurrentSchemaInfo());
            try {
                JsonDecoder decoder = new JsonDecoder(latestSchema, avroString);
                GenericDatumReader<Object> datumReader = new GenericDatumReader<Object>(latestSchema);
                obj = datumReader.read(null, decoder);
            } catch (IOException io) {
                errorStream.println("Error parsing avro string " + avroString);
                io.printStackTrace();
            }
        } else {
            // all json processing does some numeric type tightening
            obj = tightenNumericTypes(obj);
        }
    } catch (EndOfFileException eof) {
        // can be thrown from the jsonReader.read(..) call indicating, we
        // have nothing more to read.
        obj = null;
    }
    return obj;
}