org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector Java Examples

private Object parsePrimitive(JsonParser parser, PrimitiveObjectInspector oi)
        throws SerDeException, IOException {
    JsonToken currentToken = parser.getCurrentToken();
    if (currentToken == null) {
        return null;
    }
    try {
        switch (parser.getCurrentToken()) {
            case VALUE_FALSE:
            case VALUE_TRUE:
            case VALUE_NUMBER_INT:
            case VALUE_NUMBER_FLOAT:
            case VALUE_STRING:
                return getObjectOfCorrespondingPrimitiveType(parser.getText(), oi);
            case VALUE_NULL:
                return null;
            default:
                throw new SerDeException("unexpected token type: " + currentToken);
        }
    } finally {
        parser.nextToken();
    }
}
 

private static void checkIntermediateResultInspector(ObjectInspector resultInspector) {
  Assert.assertNotNull(resultInspector);
  Assert.assertEquals(resultInspector.getCategory(), ObjectInspector.Category.STRUCT);
  StructObjectInspector structResultInspector = (StructObjectInspector) resultInspector;
  List<?> fields = structResultInspector.getAllStructFieldRefs();
  Assert.assertEquals(fields.size(), 2);

  ObjectInspector inspector1 = ((StructField) fields.get(0)).getFieldObjectInspector();
  Assert.assertEquals(inspector1.getCategory(), ObjectInspector.Category.PRIMITIVE);
  PrimitiveObjectInspector primitiveInspector1 = (PrimitiveObjectInspector) inspector1;
  Assert.assertEquals(primitiveInspector1.getPrimitiveCategory(), PrimitiveCategory.LONG);

  ObjectInspector inspector2 = ((StructField) fields.get(1)).getFieldObjectInspector();
  Assert.assertEquals(inspector2.getCategory(), ObjectInspector.Category.PRIMITIVE);
  PrimitiveObjectInspector primitiveInspector2 = (PrimitiveObjectInspector) inspector2;
  Assert.assertEquals(primitiveInspector2.getPrimitiveCategory(), PrimitiveCategory.BINARY);
}
 

@Nonnull
protected final ObjectInspector getFeatureOutputOI(@Nonnull final FeatureType featureType)
        throws UDFArgumentException {
    final PrimitiveObjectInspector outputOI;
    if (dense_model) {
        // TODO validation
        outputOI = PrimitiveObjectInspectorFactory.javaIntObjectInspector; // see DenseModel (long/string is also parsed as int)
    } else {
        switch (featureType) {
            case STRING:
                outputOI = PrimitiveObjectInspectorFactory.javaStringObjectInspector;
                break;
            case INT:
                outputOI = PrimitiveObjectInspectorFactory.javaIntObjectInspector;
                break;
            case LONG:
                outputOI = PrimitiveObjectInspectorFactory.javaLongObjectInspector;
                break;
            default:
                throw new IllegalStateException("Unexpected feature type: " + featureType);
        }
    }
    return outputOI;
}
 

public static boolean isNumberOI(@Nonnull final ObjectInspector argOI) {
    if (argOI.getCategory() != Category.PRIMITIVE) {
        return false;
    }
    final PrimitiveObjectInspector oi = (PrimitiveObjectInspector) argOI;
    switch (oi.getPrimitiveCategory()) {
        case SHORT:
        case INT:
        case LONG:
        case FLOAT:
        case DOUBLE:
        case DECIMAL:
        case BYTE:
            //case TIMESTAMP:
            return true;
        default:
            return false;
    }
}
 

private void parseDecimalColumn(int column)
{
    loaded[column] = true;

    Object fieldData = rowInspector.getStructFieldData(rowData, structFields[column]);

    if (fieldData == null) {
        nulls[column] = true;
    }
    else {
        Object fieldValue = ((PrimitiveObjectInspector) fieldInspectors[column]).getPrimitiveJavaObject(fieldData);
        checkState(fieldValue != null, "fieldValue should not be null");

        HiveDecimal decimal = (HiveDecimal) fieldValue;
        DecimalType columnType = (DecimalType) types[column];
        BigInteger unscaledDecimal = rescale(decimal.unscaledValue(), decimal.scale(), columnType.getScale());

        if (columnType.isShort()) {
            longs[column] = unscaledDecimal.longValue();
        }
        else {
            slices[column] = Decimals.encodeUnscaledValue(unscaledDecimal);
        }
        nulls[column] = false;
    }
}
 

@Override
public Writable serialize(Object obj, ObjectInspector objectInspector) throws SerDeException {
    if (!objectInspector.getCategory().equals(ObjectInspector.Category.STRUCT)) {
        throw new SerDeException("Cannot serialize " + objectInspector.getCategory() + ". Can only serialize a struct");
    }

    StructObjectInspector inspector = (StructObjectInspector) objectInspector;
    List<? extends StructField> fields = inspector.getAllStructFieldRefs();
    Writable[] arr = new Writable[fields.size()];
    for (int i = 0; i < fields.size(); i++) {
        StructField field = fields.get(i);
        Object subObj = inspector.getStructFieldData(obj, field);
        ObjectInspector subInspector = field.getFieldObjectInspector();
        arr[i] = createPrimitive(subObj, (PrimitiveObjectInspector) subInspector);
    }
    serdeSize = arr.length;
    return new ArrayWritable(Writable.class, arr);
}
 

@Override
public ObjectInspector initialize(ObjectInspector[] OIs)
		throws UDFArgumentException {
	
	if (OIs.length != 2) {
		throw new UDFArgumentException("Function takes exactly 2 arguments");
	}

	if (OIs[0].getCategory() != Category.PRIMITIVE) {
		throw new UDFArgumentException("Argument 0 must be a number - got: " + OIs[0].getCategory());
	}

	oiBinSize = (PrimitiveObjectInspector)OIs[0];
	if (!EnumSet.of(PrimitiveCategory.DECIMAL,PrimitiveCategory.DOUBLE,PrimitiveCategory.INT,PrimitiveCategory.LONG,PrimitiveCategory.SHORT, PrimitiveCategory.FLOAT).contains(oiBinSize.getPrimitiveCategory())) {
		throw new UDFArgumentException("Argument 0 must be a number - got: " + oiBinSize.getPrimitiveCategory());
	}

	geomHelper = HiveGeometryOIHelper.create(OIs[1], 1);
	binSizeIsConstant = ObjectInspectorUtils.isConstantObjectInspector(OIs[0]);

	return PrimitiveObjectInspectorFactory.javaLongObjectInspector;
}
 

@Nonnull
public static void toDoubleArray(@Nullable final Object argObj,
        @Nonnull final ListObjectInspector listOI,
        @Nonnull final PrimitiveObjectInspector elemOI, @Nonnull final double[] out,
        final boolean avoidNull) throws UDFArgumentException {
    if (argObj == null) {
        return;
    }
    final int length = listOI.getListLength(argObj);
    if (out.length != length) {
        throw new UDFArgumentException(
            "Dimension mismatched. Expected: " + out.length + ", Actual: " + length);
    }
    for (int i = 0; i < length; i++) {
        Object o = listOI.getListElement(argObj, i);
        if (o == null) {
            if (avoidNull) {
                continue;
            }
            throw new UDFArgumentException("Found null at index " + i);
        }
        out[i] = PrimitiveObjectInspectorUtils.getDouble(o, elemOI);
    }
    return;
}
 

@Override
public ObjectInspector init(final Mode mode, final ObjectInspector[] parameters) throws HiveException {
  super.init(mode, parameters);
  inputObjectInspector = (PrimitiveObjectInspector) parameters[0];

  // Parameters:
  // In PARTIAL1 and COMPLETE mode, the parameters are original data.
  // In PARTIAL2 and FINAL mode, the parameters are partial aggregations.
  if (mode == Mode.PARTIAL1 || mode == Mode.COMPLETE) {
    if (parameters.length > 1) {
      kObjectInspector = (PrimitiveObjectInspector) parameters[1];
    }
  }

  return PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.BINARY);
}
 

@Nonnull
private static StructObjectInspector internalMergeOI(
        @Nonnull PrimitiveObjectInspector keyOI, @Nonnull ObjectInspector valueOI) {
    List<String> fieldNames = new ArrayList<String>();
    List<ObjectInspector> fieldOIs = new ArrayList<ObjectInspector>();

    fieldNames.add("partialMap");
    fieldOIs.add(ObjectInspectorFactory.getStandardMapObjectInspector(
        ObjectInspectorUtils.getStandardObjectInspector(keyOI),
        ObjectInspectorUtils.getStandardObjectInspector(valueOI)));

    fieldNames.add("size");
    fieldOIs.add(PrimitiveObjectInspectorFactory.writableIntObjectInspector);

    return ObjectInspectorFactory.getStandardStructObjectInspector(fieldNames, fieldOIs);
}
 

@Nonnull
private static Int2FloatMap int2floatMap(final int item, @Nonnull final Map<?, ?> map,
        @Nonnull final PrimitiveObjectInspector keyOI,
        @Nonnull final PrimitiveObjectInspector valueOI, @Nullable final FloatMatrix dataMatrix,
        @Nullable Int2FloatMap dst) {
    if (dst == null) {
        dst = new Int2FloatOpenHashMap(map.size());
        dst.defaultReturnValue(0.f);
    } else {
        dst.clear();
    }

    for (Map.Entry<?, ?> entry : map.entrySet()) {
        float rating = PrimitiveObjectInspectorUtils.getFloat(entry.getValue(), valueOI);
        if (rating == 0.f) {
            continue;
        }
        int user = PrimitiveObjectInspectorUtils.getInt(entry.getKey(), keyOI);
        dst.put(user, rating);
        if (dataMatrix != null) {
            dataMatrix.set(item, user, rating);
        }
    }

    return dst;
}
 

@Nonnull
private static Int2ObjectMap<Int2FloatMap> kNNentries(@Nonnull final Object kNNiObj,
        @Nonnull final MapObjectInspector knnItemsOI,
        @Nonnull final PrimitiveObjectInspector knnItemsKeyOI,
        @Nonnull final MapObjectInspector knnItemsValueOI,
        @Nonnull final PrimitiveObjectInspector knnItemsValueKeyOI,
        @Nonnull final PrimitiveObjectInspector knnItemsValueValueOI,
        @Nullable Int2ObjectMap<Int2FloatMap> knnItems, @Nonnull final MutableInt nnzKNNi) {
    if (knnItems == null) {
        knnItems = new Int2ObjectOpenHashMap<>(1024);
    } else {
        knnItems.clear();
    }

    int numElementOfKNNItems = 0;
    for (Map.Entry<?, ?> entry : knnItemsOI.getMap(kNNiObj).entrySet()) {
        int user = PrimitiveObjectInspectorUtils.getInt(entry.getKey(), knnItemsKeyOI);
        Int2FloatMap ru = int2floatMap(knnItemsValueOI.getMap(entry.getValue()),
            knnItemsValueKeyOI, knnItemsValueValueOI);
        knnItems.put(user, ru);
        numElementOfKNNItems += ru.size();
    }

    nnzKNNi.setValue(numElementOfKNNItems);
    return knnItems;
}
 

@Override
public StructObjectInspector initialize(ObjectInspector[] argOIs) throws UDFArgumentException {
    if (argOIs.length < 2) {
        throw new UDFArgumentException(getClass().getSimpleName()
                + " takes 2 arguments: List<Int|BigInt|Text> features, {Int|BitInt|Text} label [, constant text options]");
    }
    PrimitiveObjectInspector featureInputOI = processFeaturesOI(argOIs[0]);
    this.labelInputOI = HiveUtils.asPrimitiveObjectInspector(argOIs[1]);
    String labelTypeName = labelInputOI.getTypeName();
    if (!STRING_TYPE_NAME.equals(labelTypeName) && !INT_TYPE_NAME.equals(labelTypeName)
            && !BIGINT_TYPE_NAME.equals(labelTypeName)) {
        throw new UDFArgumentTypeException(0,
            "label must be a type [Int|BigInt|Text]: " + labelTypeName);
    }

    processOptions(argOIs);

    this.label2model = new HashMap<Object, PredictionModel>(64);
    this.count = 0;

    return getReturnOI(labelInputOI, getFeatureOutputOI(featureInputOI));
}
 

public static LazySimpleSerDe getLineSerde(@Nonnull final PrimitiveObjectInspector... OIs)
        throws SerDeException {
    if (OIs.length == 0) {
        throw new IllegalArgumentException("OIs must be specified");
    }
    LazySimpleSerDe serde = new LazySimpleSerDe();
    Configuration conf = new Configuration();
    Properties tbl = new Properties();

    StringBuilder columnNames = new StringBuilder();
    StringBuilder columnTypes = new StringBuilder();
    for (int i = 0; i < OIs.length; i++) {
        columnNames.append('c').append(i + 1).append(',');
        columnTypes.append(OIs[i].getTypeName()).append(',');
    }
    columnNames.deleteCharAt(columnNames.length() - 1);
    columnTypes.deleteCharAt(columnTypes.length() - 1);

    tbl.setProperty("columns", columnNames.toString());
    tbl.setProperty("columns.types", columnTypes.toString());
    serde.initialize(conf, tbl);
    return serde;
}
 

void doIterate(@Nonnull final Object tuple, @Nonnull ListObjectInspector listOI,
        @Nonnull PrimitiveObjectInspector elemOI) throws HiveException {
    final int size = listOI.getListLength(tuple);
    if (_size == -1) {
        init(size);
    }
    if (size != _size) {// a corner case
        throw new HiveException(
            "Mismatch in the number of elements at tuple: " + tuple.toString());
    }
    final double[] sum = _sum;
    final long[] count = _count;
    for (int i = 0, len = size; i < len; i++) {
        Object o = listOI.getListElement(tuple, i);
        if (o != null) {
            double v = PrimitiveObjectInspectorUtils.getDouble(o, elemOI);
            sum[i] += v;
            count[i] += 1L;
        }
    }
}
 

@Nonnull
public static long[] asLongArray(@Nullable final Object argObj,
        @Nonnull final ListObjectInspector listOI, @Nonnull PrimitiveObjectInspector elemOI) {
    if (argObj == null) {
        return null;
    }
    final int length = listOI.getListLength(argObj);
    final long[] ary = new long[length];
    for (int i = 0; i < length; i++) {
        Object o = listOI.getListElement(argObj, i);
        if (o == null) {
            continue;
        }
        ary[i] = PrimitiveObjectInspectorUtils.getLong(o, elemOI);
    }
    return ary;
}
 

@Nonnull
public static PrimitiveObjectInspector asIntegerOI(@Nonnull final ObjectInspector argOI)
        throws UDFArgumentTypeException {
    if (argOI.getCategory() != Category.PRIMITIVE) {
        throw new UDFArgumentTypeException(0, "Only primitive type arguments are accepted but "
                + argOI.getTypeName() + " is passed.");
    }
    final PrimitiveObjectInspector oi = (PrimitiveObjectInspector) argOI;
    switch (oi.getPrimitiveCategory()) {
        case INT:
        case SHORT:
        case LONG:
        case BYTE:
            break;
        default:
            throw new UDFArgumentTypeException(0,
                "Unexpected type '" + argOI.getTypeName() + "' is passed.");
    }
    return oi;
}
 

static void checkIntermediateResultInspector(ObjectInspector resultInspector) {
  Assert.assertNotNull(resultInspector);
  Assert.assertEquals(resultInspector.getCategory(), ObjectInspector.Category.STRUCT);
  StructObjectInspector structResultInspector = (StructObjectInspector) resultInspector;
  List<?> fields = structResultInspector.getAllStructFieldRefs();
  Assert.assertEquals(fields.size(), 2);

  ObjectInspector inspector1 = ((StructField) fields.get(0)).getFieldObjectInspector();
  Assert.assertEquals(inspector1.getCategory(), ObjectInspector.Category.PRIMITIVE);
  PrimitiveObjectInspector primitiveInspector1 = (PrimitiveObjectInspector) inspector1;
  Assert.assertEquals(primitiveInspector1.getPrimitiveCategory(), PrimitiveCategory.INT);

  ObjectInspector inspector2 = ((StructField) fields.get(1)).getFieldObjectInspector();
  Assert.assertEquals(inspector2.getCategory(), ObjectInspector.Category.PRIMITIVE);
  PrimitiveObjectInspector primitiveInspector2 = (PrimitiveObjectInspector) inspector2;
  Assert.assertEquals(primitiveInspector2.getPrimitiveCategory(), PrimitiveCategory.BINARY);
}
 

static void checkIntermediateResultInspector(ObjectInspector resultInspector) {
  Assert.assertNotNull(resultInspector);
  Assert.assertEquals(resultInspector.getCategory(), ObjectInspector.Category.STRUCT);
  StructObjectInspector structResultInspector = (StructObjectInspector) resultInspector;
  List<?> fields = structResultInspector.getAllStructFieldRefs();
  Assert.assertEquals(fields.size(), 3);

  ObjectInspector inspector1 = ((StructField) fields.get(0)).getFieldObjectInspector();
  Assert.assertEquals(inspector1.getCategory(), ObjectInspector.Category.PRIMITIVE);
  PrimitiveObjectInspector primitiveInspector1 = (PrimitiveObjectInspector) inspector1;
  Assert.assertEquals(primitiveInspector1.getPrimitiveCategory(), PrimitiveCategory.INT);

  ObjectInspector inspector2 = ((StructField) fields.get(1)).getFieldObjectInspector();
  Assert.assertEquals(inspector2.getCategory(), ObjectInspector.Category.PRIMITIVE);
  PrimitiveObjectInspector primitiveInspector2 = (PrimitiveObjectInspector) inspector2;
  Assert.assertEquals(primitiveInspector2.getPrimitiveCategory(), PrimitiveCategory.STRING);

  ObjectInspector inspector3 = ((StructField) fields.get(2)).getFieldObjectInspector();
  Assert.assertEquals(inspector3.getCategory(), ObjectInspector.Category.PRIMITIVE);
  PrimitiveObjectInspector primitiveInspector3 = (PrimitiveObjectInspector) inspector3;
  Assert.assertEquals(primitiveInspector3.getPrimitiveCategory(), PrimitiveCategory.BINARY);
}
 

@Nonnull
public static PrimitiveObjectInspector asNumberOI(@Nonnull final ObjectInspector[] argOIs,
        final int argIndex) throws UDFArgumentException {
    final PrimitiveObjectInspector oi = asPrimitiveObjectInspector(argOIs, argIndex);
    switch (oi.getPrimitiveCategory()) {
        case BYTE:
        case SHORT:
        case INT:
        case LONG:
        case FLOAT:
        case DOUBLE:
        case DECIMAL:
            break;
        default:
            throw new UDFArgumentTypeException(argIndex,
                "Only numeric argument is accepted but " + oi.getTypeName() + " is passed.");
    }
    return oi;
}
 

private ColumnVector getColumnVector(ObjectInspector oi) {
  Category category = oi.getCategory();
  switch (category) {

    case PRIMITIVE:
      return getPrimitiveColumnVector((PrimitiveObjectInspector)oi);
    case LIST:
      return getListColumnVector((ListObjectInspector)oi);
    case STRUCT:
      return getStructColumnVector((StructObjectInspector)oi);
    case MAP:
      return getMapColumnVector((MapObjectInspector)oi);
    case UNION:
      return getUnionColumnVector((UnionObjectInspector)oi);
    default:
      throw UserException.unsupportedError()
        .message("Vectorized ORC reader is not supported for datatype: %s", category)
        .build(logger);
  }
}
 

@Override
public GenericUDAFEvaluator getEvaluator(final GenericUDAFParameterInfo info)
    throws SemanticException {
  final ObjectInspector[] inspectors = info.getParameterObjectInspectors();
  if (inspectors.length != 2) {
    throw new UDFArgumentException("Two arguments expected");
  }

  if (inspectors[0].getCategory() != ObjectInspector.Category.PRIMITIVE) {
    throw new UDFArgumentTypeException(0, "Primitive argument expected, but "
        + inspectors[0].getTypeName() + " was recieved");
  }

  if (inspectors[1].getCategory() != ObjectInspector.Category.PRIMITIVE) {
    throw new UDFArgumentTypeException(0, "Primitive argument expected, but "
        + inspectors[1].getTypeName() + " was recieved");
  }
  final PrimitiveObjectInspector inspector2 = (PrimitiveObjectInspector) inspectors[1];
  if (inspector2.getPrimitiveCategory() != PrimitiveObjectInspector.PrimitiveCategory.INT) {
    throw new UDFArgumentTypeException(0, "Integer value expected as the second argument, but "
        + inspector2.getPrimitiveCategory().name() + " was received");
  }

  return createEvaluator();
}
 

@Override
public ObjectInspector init(final Mode mode, final ObjectInspector[] parameters)
    throws HiveException {
  final ObjectInspector result = super.init(mode, parameters);

  // Parameters:
  // In PARTIAL1 and COMPLETE mode, the parameters are original data.
  // In PARTIAL2 and FINAL mode, the parameters are just partial aggregations.
  if ((mode == Mode.PARTIAL1) || (mode == Mode.COMPLETE)) {
    if (parameters.length > 1) {
      maxMapSizeObjectInspector = (PrimitiveObjectInspector) parameters[1];
    }
  }

  return result;
}
 

/**
 * @return the number of true bits
 */
@Nonnull
public static int setBits(@Nullable final Object argObj,
        @Nonnull final ListObjectInspector listOI,
        @Nonnull final PrimitiveObjectInspector elemOI, @Nonnull final BitSet bitset)
        throws UDFArgumentException {
    if (argObj == null) {
        return 0;
    }
    int count = 0;
    final int length = listOI.getListLength(argObj);
    for (int i = 0; i < length; i++) {
        final Object o = listOI.getListElement(argObj, i);
        if (o == null) {
            continue;
        }
        final int index = PrimitiveObjectInspectorUtils.getInt(o, elemOI);
        if (index < 0) {
            throw new UDFArgumentException("Negative index is not allowed: " + index);
        }
        bitset.set(index);
        count++;
    }
    return count;
}
 

@Override
public ObjectInspector init(final Mode mode, final ObjectInspector[] inspectors) throws HiveException {
  final ObjectInspector resultInspector = super.init(mode, inspectors);
  if ((mode == Mode.PARTIAL1) || (mode == Mode.COMPLETE)) {
    // input is original data
    if (inspectors.length > 2) {
      summaryModeInspector_ = (PrimitiveObjectInspector) inspectors[2];
    }
  }
  if ((mode == Mode.PARTIAL1) || (mode == Mode.PARTIAL2)) {
    // intermediate results need to include the nominal number of entries and the summary mode
    return ObjectInspectorFactory.getStandardStructObjectInspector(
      Arrays.asList(NOMINAL_NUM_ENTRIES_FIELD, SUMMARY_MODE_FIELD, SKETCH_FIELD),
      Arrays.asList(
        PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.INT),
        PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.STRING),
        PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.BINARY)
      )
    );
  }
  return resultInspector;
}
 

static void validateIntegralParameter(final ObjectInspector inspector, final int index)
    throws UDFArgumentTypeException {
  validateCategoryPrimitive(inspector, index);
  final PrimitiveObjectInspector primitiveInspector = (PrimitiveObjectInspector) inspector;
  switch (primitiveInspector.getPrimitiveCategory()) {
  case BYTE:
  case SHORT:
  case INT:
  case LONG:
    break;
  // all other types are invalid
  default:
    throw new UDFArgumentTypeException(index, "Only integral type parameters are expected but "
        + primitiveInspector.getPrimitiveCategory().name() + " was passed as parameter " + (index + 1));
  }
}
 

@Override
public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
  if (arguments.length != 2) {
    throw new UDFArgumentLengthException(
        "The function COUNTRY(ip, geolocfile) takes exactly 2 arguments.");
  }

  converters = new ObjectInspectorConverters.Converter[arguments.length];
  for (int i = 0; i < arguments.length; i++) {
    converters[i] = ObjectInspectorConverters.getConverter(arguments[i],
        PrimitiveObjectInspectorFactory.javaStringObjectInspector);
  }

  return PrimitiveObjectInspectorFactory
      .getPrimitiveJavaObjectInspector(PrimitiveObjectInspector.PrimitiveCategory.STRING);
}
 

@Nonnull
public static PrimitiveObjectInspector asFloatingPointOI(@Nonnull final ObjectInspector argOI)
        throws UDFArgumentTypeException {
    if (argOI.getCategory() != Category.PRIMITIVE) {
        throw new UDFArgumentTypeException(0, "Only primitive type arguments are accepted but "
                + argOI.getTypeName() + " is passed.");
    }
    final PrimitiveObjectInspector oi = (PrimitiveObjectInspector) argOI;
    switch (oi.getPrimitiveCategory()) {
        case FLOAT:
        case DOUBLE:
        case DECIMAL:
            break;
        default:
            throw new UDFArgumentTypeException(0, "Only floating point number is accepted but "
                    + argOI.getTypeName() + " is passed.");
    }
    return oi;
}
 

@Override
public StructObjectInspector initialize(ObjectInspector[] args) throws UDFArgumentException {
    stringOI = (PrimitiveObjectInspector) args[0];

    List<String> fieldNames = new ArrayList<String>(2);
    List<ObjectInspector> fieldOIs = new ArrayList<ObjectInspector>(2);
    fieldNames.add("id");
    fieldNames.add("name");
    fieldOIs.add(PrimitiveObjectInspectorFactory.javaStringObjectInspector);
    fieldOIs.add(PrimitiveObjectInspectorFactory.javaStringObjectInspector);
    return ObjectInspectorFactory.getStandardStructObjectInspector(fieldNames, fieldOIs);
}
 

@Override
public StructObjectInspector initialize(ObjectInspector[] args) throws UDFArgumentException {
    stringOI = (PrimitiveObjectInspector) args[0];

    List<String> fieldNames = new ArrayList<String>(2);
    List<ObjectInspector> fieldOIs = new ArrayList<ObjectInspector>(2);
    fieldNames.add("id");
    fieldNames.add("name");
    fieldOIs.add(PrimitiveObjectInspectorFactory.javaStringObjectInspector);
    fieldOIs.add(PrimitiveObjectInspectorFactory.javaStringObjectInspector);
    return ObjectInspectorFactory.getStandardStructObjectInspector(fieldNames, fieldOIs);
}