}
public static Optional<HiveBucket> getHiveBucket(List<Entry<ObjectInspector, Object>> columnBindings, int bucketCount)
{
try {
GenericUDFHash udf = new GenericUDFHash();
ObjectInspector[] objectInspectors = new ObjectInspector[columnBindings.size()];
DeferredObject[] deferredObjects = new DeferredObject[columnBindings.size()];
int i = 0;
for (Entry<ObjectInspector, Object> entry : columnBindings) {
objectInspectors[i] = getJavaObjectInspector(entry.getKey());
deferredObjects[i] = getJavaDeferredObject(entry.getValue(), entry.getKey());
i++;
}
ObjectInspector udfInspector = udf.initialize(objectInspectors);
checkArgument(udfInspector instanceof IntObjectInspector, "expected IntObjectInspector: %s", udfInspector);
IntObjectInspector inspector = (IntObjectInspector) udfInspector;
Object result = udf.evaluate(deferredObjects);
HiveKey hiveKey = new HiveKey();
hiveKey.setHashCode(inspector.get(result));
int bucketNumber = new DefaultHivePartitioner<>().getBucket(hiveKey, null, bucketCount);