// TODO this function should be somewhere in shared place
@SuppressWarnings({"rawtypes", "unchecked"})
protected final Object readAtOnce(LVReplicaPartition partition, LVColumn column)
throws IOException {
ColumnFileReaderBundle reader = getReader(partition, column);
int tupleCount = reader.getDataReader().getTotalTuples();
LOG.info("reading " + column.getName() + " at once...");
ValueTraits traits = ValueTraitsFactory.getInstance(column.getType());
Object array = traits.createArray(tupleCount);
int read = ((TypedReader) reader.getDataReader()).readValues(array, 0, tupleCount);
LOG.info("read.");
reader.close();
assert (read == tupleCount);
return array;
}
// TODO this function should be somewhere in shared place
protected final ColumnFileReaderBundle getReader(LVReplicaPartition partition, LVColumn column)
throws IOException {
assert (partition.getNodeId().intValue() == context.nodeId);
LVColumnFile file =
context.metaRepo.getColumnFileByReplicaPartitionAndColumn(
partition.getPartitionId(), column.getColumnId());
assert (file != null);
ColumnFileBundle fileBundle = new ColumnFileBundle(file);
return new ColumnFileReaderBundle(fileBundle, 0); // no buffering needed. we read them at once
}
