@Override
protected T nextImpl() throws IOException {
String encodedElementString = encodedElements.get(nextIndex++);
// TODO: Replace with the real encoding used by the
// front end, when we know what it is.
byte[] encodedElement = StringUtils.jsonStringToByteArray(encodedElementString);
notifyElementRead(encodedElement.length);
return CoderUtils.decodeFromByteArray(coder, encodedElement);
}
@Test
public void testCombineValuesFnCoders() throws Exception {
CoderRegistry registry = new CoderRegistry();
registry.registerStandardCoders();
MeanInts meanInts = new MeanInts();
MeanInts.CountSum countSum = meanInts.new CountSum(6, 27);
Coder<MeanInts.CountSum> coder =
meanInts.getAccumulatorCoder(
registry, registry.getDefaultCoder(TypeDescriptor.of(Integer.class)));
assertEquals(
countSum,
CoderUtils.decodeFromByteArray(coder, CoderUtils.encodeToByteArray(coder, countSum)));
}