@Override
public Iterator<HCatRecord> read() throws HCatException {
HCatInputFormat inpFmt = new HCatInputFormat();
RecordReader<WritableComparable, HCatRecord> rr;
try {
TaskAttemptContext cntxt =
ShimLoader.getHadoopShims()
.getHCatShim()
.createTaskAttemptContext(conf, new TaskAttemptID());
rr = inpFmt.createRecordReader(split, cntxt);
rr.initialize(split, cntxt);
} catch (IOException e) {
throw new HCatException(ErrorType.ERROR_NOT_INITIALIZED, e);
} catch (InterruptedException e) {
throw new HCatException(ErrorType.ERROR_NOT_INITIALIZED, e);
}
return new HCatRecordItr(rr);
}
@Override
public ReaderContext prepareRead() throws HCatException {
try {
Job job = new Job(conf);
HCatInputFormat hcif =
HCatInputFormat.setInput(job, re.getDbName(), re.getTableName(), re.getFilterString());
ReaderContextImpl cntxt = new ReaderContextImpl();
cntxt.setInputSplits(
hcif.getSplits(
ShimLoader.getHadoopShims()
.getHCatShim()
.createJobContext(job.getConfiguration(), null)));
cntxt.setConf(job.getConfiguration());
return cntxt;
} catch (IOException e) {
throw new HCatException(ErrorType.ERROR_NOT_INITIALIZED, e);
} catch (InterruptedException e) {
throw new HCatException(ErrorType.ERROR_NOT_INITIALIZED, e);
}
}