SHOW:
|
|
- or go back to the newest paste.
| 1 | public class MyLoadFunc extends LoadFunc { | |
| 2 | protected RecordReader in = null; | |
| 3 | private byte fieldDel = '\t'; | |
| 4 | private ArrayList<Object> mProtoTuple = null; | |
| 5 | private TupleFactory mTupleFactory = TupleFactory.getInstance(); | |
| 6 | private static final int BUFFER_SIZE = 1024; | |
| 7 | private static Log log = LogFactory.getLog(GeofenceLoadFunc.class); | |
| 8 | ||
| 9 | @Override | |
| 10 | public Tuple getNext() throws IOException { | |
| 11 | try { | |
| 12 | boolean notDone = in.nextKeyValue(); | |
| 13 | ||
| 14 | if (!notDone) { | |
| 15 | return null; | |
| 16 | } | |
| 17 | Text value = (Text) in.getCurrentValue(); | |
| 18 | ||
| 19 | byte[] buf = value.getBytes(); | |
| 20 | int len = value.getLength(); | |
| 21 | int start = 0; | |
| 22 | ||
| 23 | for (int i = 0; i < len; i++) { | |
| 24 | if (buf[i] == fieldDel) { | |
| 25 | readField(buf, start, i); | |
| 26 | start = i + 1; | |
| 27 | } | |
| 28 | } | |
| 29 | // pick up the last field | |
| 30 | readField(buf, start, len); | |
| 31 | ||
| 32 | Tuple t = mTupleFactory.newTupleNoCopy(mProtoTuple); | |
| 33 | mProtoTuple = null; | |
| 34 | return t; | |
| 35 | } catch (InterruptedException e) { | |
| 36 | int errCode = 6018; | |
| 37 | String errMsg = "Error while reading input"; | |
| 38 | throw new ExecException(errMsg, errCode, | |
| 39 | PigException.REMOTE_ENVIRONMENT, e); | |
| 40 | } | |
| 41 | ||
| 42 | } | |
| 43 | ||
| 44 | private void readField(byte[] buf, int start, int end) { | |
| 45 | if (mProtoTuple == null) { | |
| 46 | mProtoTuple = new ArrayList<Object>(); | |
| 47 | } | |
| 48 | ||
| 49 | if (start == end) { | |
| 50 | // NULL value | |
| 51 | mProtoTuple.add(null); | |
| 52 | } else { | |
| 53 | mProtoTuple.add(new DataByteArray(buf, start, end)); | |
| 54 | } | |
| 55 | } | |
| 56 | ||
| 57 | @Override | |
| 58 | public InputFormat getInputFormat() { | |
| 59 | return new TextInputFormat(); | |
| 60 | } | |
| 61 | ||
| 62 | @Override | |
| 63 | public void prepareToRead(RecordReader reader, PigSplit split) { | |
| 64 | in = reader; | |
| 65 | } | |
| 66 | ||
| 67 | @Override | |
| 68 | public void setLocation(String location, Job job) | |
| 69 | throws IOException { | |
| 70 | FileInputFormat.setInputPaths(job, location); | |
| 71 | } | |
| 72 | } |