@Override
public void readFields(DataInput input) throws IOException {
super.readFields(input);
formatString = WritableUtils.readString(input);
type = WritableUtils.readEnum(input, FunctionArgumentType.class);
formatter = type.getFormatter(formatString);
}
@Override
public void readFields(DataInput input) throws IOException {
super.readFields(input);
init();
}
@Override
public void write(DataOutput output) throws IOException {
super.write(output);
WritableUtils.writeString(output, formatString);
WritableUtils.writeEnum(output, type);
}