org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector.Category Java Examples

private static ObjectInspector getJavaObjectInspector(TypeInfo typeInfo)
{
    Category category = typeInfo.getCategory();
    if (category == PRIMITIVE) {
        return getPrimitiveJavaObjectInspector(getPrimitiveTypeInfo(typeInfo.getTypeName()));
    }
    if (category == LIST) {
        ListTypeInfo listTypeInfo = (ListTypeInfo) typeInfo;
        return getStandardListObjectInspector(getJavaObjectInspector(listTypeInfo.getListElementTypeInfo()));
    }
    if (category == MAP) {
        MapTypeInfo mapTypeInfo = (MapTypeInfo) typeInfo;
        return getStandardMapObjectInspector(
                getJavaObjectInspector(mapTypeInfo.getMapKeyTypeInfo()),
                getJavaObjectInspector(mapTypeInfo.getMapValueTypeInfo()));
    }
    throw new PrestoException(GENERIC_INTERNAL_ERROR, "Unhandled storage type: " + category);
}
 

private boolean canCoerceForStruct(HiveType fromHiveType, HiveType toHiveType)
{
    if (fromHiveType.getCategory() != Category.STRUCT || toHiveType.getCategory() != Category.STRUCT) {
        return false;
    }
    List<String> fromFieldNames = ((StructTypeInfo) fromHiveType.getTypeInfo()).getAllStructFieldNames();
    List<String> toFieldNames = ((StructTypeInfo) toHiveType.getTypeInfo()).getAllStructFieldNames();
    List<HiveType> fromFieldTypes = extractStructFieldTypes(fromHiveType);
    List<HiveType> toFieldTypes = extractStructFieldTypes(toHiveType);
    // Rule:
    // * Fields may be added or dropped from the end.
    // * For all other field indices, the corresponding fields must have
    //   the same name, and the type must be coercible.
    for (int i = 0; i < min(fromFieldTypes.size(), toFieldTypes.size()); i++) {
        if (!fromFieldNames.get(i).equals(toFieldNames.get(i))) {
            return false;
        }
        if (!fromFieldTypes.get(i).equals(toFieldTypes.get(i)) && !canCoerce(fromFieldTypes.get(i), toFieldTypes.get(i))) {
            return false;
        }
    }
    return true;
}
 

private static boolean isTypeNotSupported(InputFormat<?,?> format, Category category, boolean includeParquetComplexTypes) {
  // No restrictions on primitive types
  if (category.equals(PRIMITIVE)) {
    return false;
  }

  // Don't support map anywhere.
  if (category.equals(MAP)) {
    return true;
  }

  // All complex types supported in Orc
  if (format instanceof OrcInputFormat) {
    return false;
  }

  // Support only list and struct in Parquet along with primitive types. // MapRedParquetInputFormat, VectorizedParquetInputformat
  if (includeParquetComplexTypes && MapredParquetInputFormat.class.isAssignableFrom(format.getClass()) && PARQUET_SUPPORTED_TYPES.contains(category)) {
    return false;
  }

  return true;
}
 

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 ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
  if (arguments.length != 1) {
    throw new UDFArgumentLengthException(String.format("%s needs 1 argument, got %d", udfName, arguments.length));
  }

  if (arguments[0].getCategory() != Category.PRIMITIVE ||
      ((PrimitiveObjectInspector) arguments[0]).getPrimitiveCategory() != inputType) {
    String actual = arguments[0].getCategory() + (arguments[0].getCategory() == Category.PRIMITIVE ?
        "[" + ((PrimitiveObjectInspector) arguments[0]).getPrimitiveCategory() + "]" : "");
    throw new UDFArgumentException(
        String.format("%s only takes primitive type %s, got %s", udfName, inputType, actual));
  }
  argumentOI = arguments[0];
  return PrimitiveObjectInspectorFactory.getPrimitiveJavaObjectInspector(outputType);
}
 

@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;
}
 

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);
  }
}
 

private static Object getJavaObjectFromPrimitiveData(Object data, ObjectInspector objInsp) {
    assert(objInsp.getCategory() == Category.PRIMITIVE);
    if (data == null) {
        return null;
    }
    if (data instanceof BytesWritable && objInsp instanceof WritableHiveDecimalObjectInspector) {
        // BytesWritable cannot be directly cast to HiveDecimalWritable
        WritableHiveDecimalObjectInspector oi = (WritableHiveDecimalObjectInspector) objInsp;
        data = oi.create(((BytesWritable) data).getBytes(), oi.scale());
    }
    Object obj = ObjectInspectorUtils.copyToStandardJavaObject(data, objInsp);
    if (obj instanceof HiveDecimal) {
        obj = ((HiveDecimal) obj).bigDecimalValue();
    } else if (obj instanceof HiveVarchar || obj instanceof HiveChar) {
        obj = obj.toString();
    } else if (obj instanceof byte[]) {
        obj = Hex.encodeHexString((byte[]) obj);
    }
    return obj;
}
 

private static Object getJavaObjectFromFieldData(Object data, ObjectInspector objInsp) {
    if (data == null) {
        return null;
    }
    if (objInsp.getCategory() == Category.PRIMITIVE) {
        Object obj = ObjectInspectorUtils.copyToStandardJavaObject(data, objInsp);
        if (obj instanceof HiveDecimal) {
            obj = ((HiveDecimal) obj).bigDecimalValue();
        } else if (obj instanceof HiveVarchar || obj instanceof HiveChar) {
            obj = obj.toString();
        } else if (obj instanceof byte[]) {
            obj = Hex.encodeHexString((byte[]) obj);
        }
        return obj;
    } else if (objInsp.getCategory() == Category.LIST) {
        return getJsonArrayFromFieldData(data, objInsp, Json.createBuilderFactory(null)).build().toString();
    } else {
        return getJsonObjectFromFieldData(data, objInsp, Json.createBuilderFactory(null)).build().toString();
    }
}
 

@Override
public Evaluator getEvaluator(TypeInfo[] typeInfo) throws SemanticException {
    if (typeInfo.length != 3) {
        throw new UDFArgumentLengthException(
            "Expected argument length is 3 but given argument length was " + typeInfo.length);
    }
    if (!HiveUtils.isNumberTypeInfo(typeInfo[0])) {
        throw new UDFArgumentTypeException(0,
            "Number type is expected for the first argument Wj: " + typeInfo[0].getTypeName());
    }
    if (typeInfo[1].getCategory() != Category.LIST) {
        throw new UDFArgumentTypeException(1,
            "List type is expected for the second argument Vjf: " + typeInfo[1].getTypeName());
    }
    ListTypeInfo typeInfo1 = (ListTypeInfo) typeInfo[1];
    if (!HiveUtils.isNumberTypeInfo(typeInfo1.getListElementTypeInfo())) {
        throw new UDFArgumentTypeException(1,
            "Number type is expected for the element type of list Vjf: "
                    + typeInfo1.getTypeName());
    }
    if (!HiveUtils.isNumberTypeInfo(typeInfo[2])) {
        throw new UDFArgumentTypeException(2,
            "Number type is expected for the third argument Xj: " + typeInfo[2].getTypeName());
    }
    return new Evaluator();
}
 

@Override
public Object evaluate(DeferredObject[] arguments) throws HiveException {
	DeferredObject jsonDeferredObject = arguments[0];
	
	String json = null;
	
	if (jsonOI.getCategory() == Category.STRUCT){
		//StructObjectInspector structOI = (StructObjectInspector)jsonOI;
		
		// TODO support structs
	} else {
		PrimitiveObjectInspector primOI = (PrimitiveObjectInspector)jsonOI;
		json = (String)primOI.getPrimitiveJavaObject(jsonDeferredObject.get());
	}
	
	
	try {
		OGCGeometry ogcGeom = OGCGeometry.fromJson(json);
		return GeometryUtils.geometryToEsriShapeBytesWritable(ogcGeom);
	} catch (Exception e) {

	}
	
	return null;
}
 

public static boolean isNumberTypeInfo(@Nonnull TypeInfo typeInfo) {
    if (typeInfo.getCategory() != ObjectInspector.Category.PRIMITIVE) {
        return false;
    }
    switch (((PrimitiveTypeInfo) typeInfo).getPrimitiveCategory()) {
        case BYTE:
        case SHORT:
        case INT:
        case LONG:
        case FLOAT:
        case DOUBLE:
        case DECIMAL:
            return true;
        default:
            return false;
    }
}
 

@Override
public Object evaluate(DeferredObject[] arguments) throws HiveException {
	DeferredObject jsonDeferredObject = arguments[0];

	String json = null;

	if (jsonOI.getCategory() == Category.STRUCT){
		//StructObjectInspector structOI = (StructObjectInspector)jsonOI;

		// TODO support structs
	} else {
		PrimitiveObjectInspector primOI = (PrimitiveObjectInspector)jsonOI;
		json = (String)primOI.getPrimitiveJavaObject(jsonDeferredObject.get());
	}

	try {
		OGCGeometry ogcGeom = OGCGeometry.fromGeoJson(json);
	    return GeometryUtils.geometryToEsriShapeBytesWritable(ogcGeom);
	} catch (Exception e) {
		LogUtils.Log_InvalidText(LOG, json);
	}

	return null;
}
 

@Nullable
public static String[] getConstStringArray(@Nonnull final ObjectInspector oi)
        throws UDFArgumentException {
    if (!ObjectInspectorUtils.isConstantObjectInspector(oi)) {
        throw new UDFArgumentException("argument must be a constant value: "
                + TypeInfoUtils.getTypeInfoFromObjectInspector(oi));
    }
    ConstantObjectInspector constOI = (ConstantObjectInspector) oi;
    if (constOI.getCategory() != Category.LIST) {
        throw new UDFArgumentException(
            "argument must be an array: " + TypeInfoUtils.getTypeInfoFromObjectInspector(oi));
    }
    final List<?> lst = (List<?>) constOI.getWritableConstantValue();
    if (lst == null) {
        return null;
    }
    final int size = lst.size();
    final String[] ary = new String[size];
    for (int i = 0; i < size; i++) {
        Object o = lst.get(i);
        if (o != null) {
            ary[i] = o.toString();
        }
    }
    return ary;
}
 

@Nonnull
public static PrimitiveObjectInspector asIntCompatibleOI(@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 FLOAT:
        case DOUBLE:
        case DECIMAL:
        case BOOLEAN:
        case BYTE:
        case STRING:
            break;
        default:
            throw new UDFArgumentTypeException(0,
                "Unexpected type '" + argOI.getTypeName() + "' is passed.");
    }
    return oi;
}
 

@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;
}
 

@Nonnull
public static PrimitiveObjectInspector asIntegerOI(@Nonnull final ObjectInspector[] argOIs,
        final int argIndex) throws UDFArgumentException {
    final ObjectInspector argOI = getObjectInspector(argOIs, argIndex);
    if (argOI.getCategory() != Category.PRIMITIVE) {
        throw new UDFArgumentTypeException(argIndex,
            "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(argIndex,
                "Unexpected type '" + argOI.getTypeName() + "' is passed.");
    }
    return oi;
}
 

@Nonnull
public static PrimitiveObjectInspector asDoubleCompatibleOI(
        @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 BYTE:
        case SHORT:
        case INT:
        case LONG:
        case FLOAT:
        case DOUBLE:
        case DECIMAL:
        case STRING:
        case TIMESTAMP:
            break;
        default:
            throw new UDFArgumentTypeException(0,
                "Only numeric or string type arguments are accepted but " + argOI.getTypeName()
                        + " is passed.");
    }
    return oi;
}
 

@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;
}
 

@Nonnull
public static PrimitiveObjectInspector asNumberOI(@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 BYTE:
        case SHORT:
        case INT:
        case LONG:
        case FLOAT:
        case DOUBLE:
        case DECIMAL:
            break;
        default:
            throw new UDFArgumentTypeException(0,
                "Only numeric argument is accepted but " + argOI.getTypeName() + " is passed.");
    }
    return oi;
}
 

@Override
public ObjectInspector initialize(ObjectInspector[] argOIs) throws UDFArgumentException {
    if (argOIs.length != 1) {
        throw new UDFArgumentLengthException(
            "argsort(array<ANY> a) takes exactly 1 argument: " + argOIs.length);
    }
    ObjectInspector argOI0 = argOIs[0];
    if (argOI0.getCategory() != Category.LIST) {
        throw new UDFArgumentException(
            "argsort(array<ANY> a) expects array<ANY> for the first argument: "
                    + argOI0.getTypeName());
    }

    this.listOI = HiveUtils.asListOI(argOI0);
    this.elemOI = listOI.getListElementObjectInspector();

    return ObjectInspectorFactory.getStandardListObjectInspector(
        PrimitiveObjectInspectorFactory.writableIntObjectInspector);
}
 

@Override
public ObjectInspector initialize(ObjectInspector[] argOIs) throws UDFArgumentException {
    if (argOIs.length != 1) {
        throw new UDFArgumentLengthException(
            "argrank(array<ANY> a) takes exactly 1 argument: " + argOIs.length);
    }
    ObjectInspector argOI0 = argOIs[0];
    if (argOI0.getCategory() != Category.LIST) {
        throw new UDFArgumentException(
            "argrank(array<ANY> a) expects array<ANY> for the first argument: "
                    + argOI0.getTypeName());
    }

    this.listOI = HiveUtils.asListOI(argOI0);
    this.elemOI = listOI.getListElementObjectInspector();

    return ObjectInspectorFactory.getStandardListObjectInspector(
        PrimitiveObjectInspectorFactory.writableIntObjectInspector);
}
 

@Override
public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
    if (arguments.length != 1) {
        throw new UDFArgumentLengthException(
            "The function MAP_KEYS only accepts one argument.");
    } else if (!(arguments[0] instanceof MapObjectInspector)) {
        throw new UDFArgumentTypeException(0,
            "\"" + Category.MAP.toString().toLowerCase()
                    + "\" is expected at function MAP_KEYS, " + "but \""
                    + arguments[0].getTypeName() + "\" is found");
    }

    this.mapOI = (MapObjectInspector) arguments[0];

    List<String> structFieldNames = new ArrayList<String>();
    List<ObjectInspector> structFieldObjectInspectors = new ArrayList<ObjectInspector>();
    structFieldNames.add("key");
    structFieldObjectInspectors.add(mapOI.getMapKeyObjectInspector());
    structFieldNames.add("value");
    structFieldObjectInspectors.add(mapOI.getMapValueObjectInspector());

    return ObjectInspectorFactory.getStandardListObjectInspector(
        ObjectInspectorFactory.getStandardStructObjectInspector(structFieldNames,
            structFieldObjectInspectors));
}
 

/**
 * Serialize a object into bytes.
 * @param foi object inspector
 * @param decalred output object inspector
 * @param obj object to be serialized
 * @param useJsonSerialize true to use json serialization
 * @return object in serialized bytes
 * @throws IOException when error happens
 */
protected byte[] serializeToBytes(ObjectInspector foi, ObjectInspector doi, Object obj, boolean useJsonSerialize) throws IOException {
  serializeStream.reset();
  boolean isNotNull;
  if (!foi.getCategory().equals(Category.PRIMITIVE)
              && useJsonSerialize) {
    isNotNull = serialize(SerDeUtils.getJSONString(obj, foi),
                PrimitiveObjectInspectorFactory.javaStringObjectInspector, doi, 1);
  } else {
    isNotNull = serialize(obj, foi, doi, 1);
  }
  if (!isNotNull) {
    return null;
  }
  byte[] key = new byte[serializeStream.getCount()];
  System.arraycopy(serializeStream.getData(), 0, key, 0, serializeStream.getCount());

  return key;
}
 

private boolean canCoerceForMap(HiveType fromHiveType, HiveType toHiveType)
{
    if (fromHiveType.getCategory() != Category.MAP || toHiveType.getCategory() != Category.MAP) {
        return false;
    }
    HiveType fromKeyType = HiveType.valueOf(((MapTypeInfo) fromHiveType.getTypeInfo()).getMapKeyTypeInfo().getTypeName());
    HiveType fromValueType = HiveType.valueOf(((MapTypeInfo) fromHiveType.getTypeInfo()).getMapValueTypeInfo().getTypeName());
    HiveType toKeyType = HiveType.valueOf(((MapTypeInfo) toHiveType.getTypeInfo()).getMapKeyTypeInfo().getTypeName());
    HiveType toValueType = HiveType.valueOf(((MapTypeInfo) toHiveType.getTypeInfo()).getMapValueTypeInfo().getTypeName());
    return (fromKeyType.equals(toKeyType) || canCoerce(fromKeyType, toKeyType)) &&
            (fromValueType.equals(toValueType) || canCoerce(fromValueType, toValueType));
}
 

private boolean canCoerceForList(HiveType fromHiveType, HiveType toHiveType)
{
    if (fromHiveType.getCategory() != Category.LIST || toHiveType.getCategory() != Category.LIST) {
        return false;
    }
    HiveType fromElementType = HiveType.valueOf(((ListTypeInfo) fromHiveType.getTypeInfo()).getListElementTypeInfo().getTypeName());
    HiveType toElementType = HiveType.valueOf(((ListTypeInfo) toHiveType.getTypeInfo()).getListElementTypeInfo().getTypeName());
    return fromElementType.equals(toElementType) || canCoerce(fromElementType, toElementType);
}
 

private static Block toBinaryBlock(io.prestosql.spi.type.Type type, Object object, ObjectInspector inspector)
{
    if (inspector.getCategory() == Category.PRIMITIVE) {
        return getPrimitiveBlock(type, object, inspector);
    }
    return getBlockObject(type, object, inspector);
}
 

@Override
public List<List<OneField>> getFieldsForBatch(OneRow batch) {

    VectorizedRowBatch vectorizedBatch = (VectorizedRowBatch) batch.getData();

    /* Allocate empty result set */
    int columnsNumber = context.getColumns();
    resolvedBatch = new ArrayList<>(vectorizedBatch.size);

    /* Create empty template row */
    ArrayList<OneField> templateRow = new ArrayList<OneField>(columnsNumber);
    ArrayList<OneField> currentRow;
    for (int j = 0; j < context.getColumns(); j++) {
        templateRow.add(null);
    }
    /* Replicate template row*/
    for (int i = 0; i < vectorizedBatch.size; i++) {
        currentRow = new ArrayList<>(templateRow);
        resolvedBatch.add(currentRow);
    }

    /* process all columns*/
    List<? extends StructField> allStructFieldRefs = soi.getAllStructFieldRefs();
    for (int columnIndex = 0; columnIndex < vectorizedBatch.numCols; columnIndex++) {
        ObjectInspector oi = allStructFieldRefs.get(columnIndex).getFieldObjectInspector();
        if (oi.getCategory() == Category.PRIMITIVE) {
            resolvePrimitiveColumn(columnIndex, oi, vectorizedBatch);
        } else {
            throw new UnsupportedTypeException("Unable to resolve column index:" + columnIndex
                    + ". Only primitive types are supported.");
        }
    }

    return resolvedBatch;
}
 

@Test
public void T_getCategory_1(){
  MapTypeInfo info = new MapTypeInfo();
  info.setMapKeyTypeInfo( TypeInfoFactory.stringTypeInfo );
  info.setMapValueTypeInfo( TypeInfoFactory.stringTypeInfo );
  MDSMapObjectInspector inspector = new MDSMapObjectInspector( info );
  assertEquals( Category.MAP , inspector.getCategory() );
}
 

@Test
public void T_getCategory_1() throws IOException{
  ListTypeInfo info = new ListTypeInfo();
  info.setListElementTypeInfo( TypeInfoFactory.stringTypeInfo );
  MDSListObjectInspector inspector = new MDSListObjectInspector( info );

  assertEquals( Category.LIST , inspector.getCategory() );
}