Java Code Examples for org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory#writableIntObjectInspector()

private ObjectInspector getObjectInspector(final TypeInfo typeInfo) {
    if (typeInfo.equals(TypeInfoFactory.doubleTypeInfo)) {
        return PrimitiveObjectInspectorFactory.writableDoubleObjectInspector;
    } else if (typeInfo.equals(TypeInfoFactory.booleanTypeInfo)) {
        return PrimitiveObjectInspectorFactory.writableBooleanObjectInspector;
    } else if (typeInfo.equals(TypeInfoFactory.floatTypeInfo)) {
        return PrimitiveObjectInspectorFactory.writableFloatObjectInspector;
    } else if (typeInfo.equals(TypeInfoFactory.intTypeInfo)) {
        return PrimitiveObjectInspectorFactory.writableIntObjectInspector;
    } else if (typeInfo.equals(TypeInfoFactory.longTypeInfo)) {
        return PrimitiveObjectInspectorFactory.writableLongObjectInspector;
    } else if (typeInfo.equals(TypeInfoFactory.stringTypeInfo)) {
        return PrimitiveObjectInspectorFactory.writableStringObjectInspector;
    } else if (typeInfo.equals(TypeInfoFactory.timestampTypeInfo)) {
        return PrimitiveObjectInspectorFactory.writableTimestampObjectInspector;
    } else if (typeInfo.equals(TypeInfoFactory.dateTypeInfo)) {
        return PrimitiveObjectInspectorFactory.writableDateObjectInspector;
    } else {
        throw new UnsupportedOperationException("Unknown field type: " + typeInfo);
    }
}
 

/**
*
* Initialize HiveUDF and create object inspectors. It requires that the argument length is = 1 and that the ObjectInspector of arguments[0] is of type StructObjectInspector
*
* @param arguments array of length 1 containing one StructObjectInspector
*
* @return ObjectInspector that is able to parse the result of the evaluate method of the UDF (BinaryWritable)
*
* @throws org.apache.hadoop.hive.ql.exec.UDFArgumentException in case the first argument is not of StructObjectInspector
* @throws org.apache.hadoop.hive.ql.exec.UDFArgumentLengthException in case the number of arguments is != 1
*
*/

@Override
public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
	if (arguments==null) {
      		throw new UDFArgumentLengthException("bitcoinTransactionHash only takes one argument: Struct<BitcoinTransaction> ");
	}
  	if (arguments.length != 1) {
      		throw new UDFArgumentLengthException("bitcoinTransactionHash only takes one argument: Struct<BitcoinTransaction> ");
	}
	if (!(arguments[0] instanceof StructObjectInspector)) { 
		throw new UDFArgumentException("first argument must be a Struct containing a BitcoinTransaction");
	}
	this.soi = (StructObjectInspector)arguments[0];
	// these are only used for bitcointransaction structs exported to other formats, such as ORC
	this.wboi = PrimitiveObjectInspectorFactory.writableBinaryObjectInspector;
	this.wioi = PrimitiveObjectInspectorFactory.writableIntObjectInspector;
	this.wloi = PrimitiveObjectInspectorFactory.writableLongObjectInspector;
	this.hdoi = PrimitiveObjectInspectorFactory.javaHiveDecimalObjectInspector;
	// the UDF returns the hash value of a BitcoinTransaction as byte array
	return PrimitiveObjectInspectorFactory.writableBinaryObjectInspector;
}
 

/**
*
* Initialize HiveUDF and create object inspectors. It requires that the argument length is = 1 and that the ObjectInspector of arguments[0] is of type StructObjectInspector
*
* @param arguments array of length 1 containing one StructObjectInspector
*
* @return ObjectInspector that is able to parse the result of the evaluate method of the UDF (BinaryWritable)
*
* @throws org.apache.hadoop.hive.ql.exec.UDFArgumentException in case the first argument is not of StructObjectInspector
* @throws org.apache.hadoop.hive.ql.exec.UDFArgumentLengthException in case the number of arguments is != 1
*
*/

@Override
public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
	if (arguments==null) {
      		throw new UDFArgumentLengthException("bitcoinTransactionHash only takes one argument: Struct<BitcoinTransaction> ");
	}
  	if (arguments.length != 1) {
      		throw new UDFArgumentLengthException("bitcoinTransactionHash only takes one argument: Struct<BitcoinTransaction> ");
	}
	if (!(arguments[0] instanceof StructObjectInspector)) { 
		throw new UDFArgumentException("first argument must be a Struct containing a BitcoinTransaction");
	}
	this.soi = (StructObjectInspector)arguments[0];
	// these are only used for bitcointransaction structs exported to other formats, such as ORC
	this.wboi = PrimitiveObjectInspectorFactory.writableBinaryObjectInspector;
	this.wioi = PrimitiveObjectInspectorFactory.writableIntObjectInspector;
	this.wloi = PrimitiveObjectInspectorFactory.writableLongObjectInspector;
	this.wbyoi = PrimitiveObjectInspectorFactory.writableByteObjectInspector;
	this.hdoi = PrimitiveObjectInspectorFactory.javaHiveDecimalObjectInspector;
	// the UDF returns the hash value of a BitcoinTransaction as byte array
	return PrimitiveObjectInspectorFactory.writableBinaryObjectInspector;
}
 

@Override
public ObjectInspector initialize(ObjectInspector[] argOIs) throws UDFArgumentException {
    if (argOIs.length != 4 && argOIs.length != 5) {
        throw new UDFArgumentException("tree_predict_v1 takes 4 or 5 arguments");
    }

    this.modelTypeOI = HiveUtils.asIntegerOI(argOIs, 1);
    this.stringOI = HiveUtils.asStringOI(argOIs, 2);
    ListObjectInspector listOI = HiveUtils.asListOI(argOIs, 3);
    this.featureListOI = listOI;
    ObjectInspector elemOI = listOI.getListElementObjectInspector();
    this.featureElemOI = HiveUtils.asDoubleCompatibleOI(elemOI);

    boolean classification = false;
    if (argOIs.length == 5) {
        classification = HiveUtils.getConstBoolean(argOIs, 4);
    }
    this.classification = classification;

    if (classification) {
        return PrimitiveObjectInspectorFactory.writableIntObjectInspector;
    } else {
        return PrimitiveObjectInspectorFactory.writableDoubleObjectInspector;
    }
}
 

@Override
public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
    // Check if two arguments were passed
    if (arguments.length != ARG_COUNT) {
        throw new UDFArgumentLengthException(
                "The function array_element_at(array, index) takes exactly " + ARG_COUNT + " arguments.");
    }

    // Check if ARRAY_IDX argument is of category LIST
    if (!arguments[ARRAY_IDX].getCategory().equals(ObjectInspector.Category.LIST)) {
        throw new UDFArgumentTypeException(ARRAY_IDX,
                "\"" + org.apache.hadoop.hive.serde.serdeConstants.LIST_TYPE_NAME + "\" "
                        + "expected at function array_element_at, but "
                        + "\"" + arguments[ARRAY_IDX].getTypeName() + "\" "
                        + "is found");
    }

    arrayOI = (ListObjectInspector) arguments[ARRAY_IDX];
    arrayElementOI = arrayOI.getListElementObjectInspector();
    indexOI = arguments[INDEX_IDX];

    ObjectInspector expectOI = PrimitiveObjectInspectorFactory.writableIntObjectInspector;

    // Check if index and expect are of same type
    if (!ObjectInspectorUtils.compareTypes(expectOI, indexOI)) {
        throw new UDFArgumentTypeException(INDEX_IDX,
                "\"" + expectOI.getTypeName() + "\""
                        + " expected at function array_element_at, but "
                        + "\"" + indexOI.getTypeName() + "\""
                        + " is found");
    }

    return arrayElementOI;
}
 

public static ObjectInspector createWritableObjectInspector(int columnId,
                                             List<OrcProto.Type> types){
  OrcProto.Type type = types.get(columnId);
  switch (type.getKind()) {
    case FLOAT:
      return PrimitiveObjectInspectorFactory.writableFloatObjectInspector;
    case DOUBLE:
      return PrimitiveObjectInspectorFactory.writableDoubleObjectInspector;
    case BOOLEAN:
      return PrimitiveObjectInspectorFactory.writableBooleanObjectInspector;
    case BYTE:
      return PrimitiveObjectInspectorFactory.writableByteObjectInspector;
    case SHORT:
      return PrimitiveObjectInspectorFactory.writableShortObjectInspector;
    case INT:
      return PrimitiveObjectInspectorFactory.writableIntObjectInspector;
    case LONG:
      return PrimitiveObjectInspectorFactory.writableLongObjectInspector;
    case BINARY:
      return PrimitiveObjectInspectorFactory.writableBinaryObjectInspector;
    case STRING:
      return PrimitiveObjectInspectorFactory.writableStringObjectInspector;
    case TIMESTAMP:
      return PrimitiveObjectInspectorFactory.javaTimestampObjectInspector;
    case STRUCT:
      return new OrcStruct.OrcStructInspector(columnId, types);
    case UNION:
      return new OrcUnion.OrcUnionObjectInspector(columnId, types);
    case MAP:
      return new OrcStruct.OrcMapObjectInspector(columnId, types);
    case LIST:
      return new OrcStruct.OrcListObjectInspector(columnId, types);
    default:
      throw new UnsupportedOperationException("Unknown type " +
        type.getKind());
  }
}
 

private ObjectInspector getObjectInspector(final TypeInfo typeInfo) {
  if (typeInfo.equals(TypeInfoFactory.doubleTypeInfo)) {
    return PrimitiveObjectInspectorFactory.writableDoubleObjectInspector;
  } else if (typeInfo.equals(TypeInfoFactory.booleanTypeInfo)) {
    return PrimitiveObjectInspectorFactory.writableBooleanObjectInspector;
  } else if (typeInfo.equals(TypeInfoFactory.floatTypeInfo)) {
    return PrimitiveObjectInspectorFactory.writableFloatObjectInspector;
  } else if (typeInfo.equals(TypeInfoFactory.intTypeInfo)) {
    return PrimitiveObjectInspectorFactory.writableIntObjectInspector;
  } else if (typeInfo.equals(TypeInfoFactory.longTypeInfo)) {
    return PrimitiveObjectInspectorFactory.writableLongObjectInspector;
  } else if (typeInfo.equals(TypeInfoFactory.stringTypeInfo)) {
    return ParquetPrimitiveInspectorFactory.parquetStringInspector;
  } else if (typeInfo.getCategory().equals(Category.STRUCT)) {
    return new ArrayWritableObjectInspector((StructTypeInfo) typeInfo);
  } else if (typeInfo.getCategory().equals(Category.LIST)) {
    final TypeInfo subTypeInfo = ((ListTypeInfo) typeInfo).getListElementTypeInfo();
    return new ParquetHiveArrayInspector(getObjectInspector(subTypeInfo));
  } else if (typeInfo.getCategory().equals(Category.MAP)) {
    final TypeInfo keyTypeInfo = ((MapTypeInfo) typeInfo).getMapKeyTypeInfo();
    final TypeInfo valueTypeInfo = ((MapTypeInfo) typeInfo).getMapValueTypeInfo();
    if (keyTypeInfo.equals(TypeInfoFactory.stringTypeInfo) || keyTypeInfo.equals(TypeInfoFactory.byteTypeInfo)
            || keyTypeInfo.equals(TypeInfoFactory.shortTypeInfo)) {
      return new DeepParquetHiveMapInspector(getObjectInspector(keyTypeInfo), getObjectInspector(valueTypeInfo));
    } else {
      return new StandardParquetHiveMapInspector(getObjectInspector(keyTypeInfo), getObjectInspector(valueTypeInfo));
    }
  } else if (typeInfo.equals(TypeInfoFactory.timestampTypeInfo)) {
    throw new UnsupportedOperationException("timestamp not implemented yet");
  } else if (typeInfo.equals(TypeInfoFactory.byteTypeInfo)) {
    return ParquetPrimitiveInspectorFactory.parquetByteInspector;
  } else if (typeInfo.equals(TypeInfoFactory.shortTypeInfo)) {
    return ParquetPrimitiveInspectorFactory.parquetShortInspector;
  } else {
    throw new IllegalArgumentException("Unknown field info: " + typeInfo);
  }

}
 

@Override
public ObjectInspector init(Mode mode, ObjectInspector[] parameters) throws HiveException {
    assert (parameters.length == 1);
    super.init(mode, parameters);
    // initialize input
    if (mode == Mode.PARTIAL1 || mode == Mode.COMPLETE) {// from original data
        this.inputListOI = (ListObjectInspector) parameters[0];
        this.inputListElemOI =
                HiveUtils.asDoubleCompatibleOI(inputListOI.getListElementObjectInspector());
    } else {// from partial aggregation
        StructObjectInspector soi = (StructObjectInspector) parameters[0];
        this.internalMergeOI = soi;
        this.sizeField = soi.getStructFieldRef("size");
        this.sumField = soi.getStructFieldRef("sum");
        this.countField = soi.getStructFieldRef("count");
        this.sizeOI = PrimitiveObjectInspectorFactory.writableIntObjectInspector;
        this.sumOI = ObjectInspectorFactory.getStandardListObjectInspector(
            PrimitiveObjectInspectorFactory.writableDoubleObjectInspector);
        this.countOI = ObjectInspectorFactory.getStandardListObjectInspector(
            PrimitiveObjectInspectorFactory.writableLongObjectInspector);
    }

    // initialize output
    final ObjectInspector outputOI;
    if (mode == Mode.PARTIAL1 || mode == Mode.PARTIAL2) {// terminatePartial
        outputOI = internalMergeOI();
    } else {// terminate
        outputOI = ObjectInspectorFactory.getStandardListObjectInspector(
            PrimitiveObjectInspectorFactory.writableDoubleObjectInspector);
    }
    return outputOI;
}
 

@Override
public ObjectInspector initialize(ObjectInspector[] argOIs) throws UDFArgumentException {
    if (argOIs.length != 1) {
        throw new UDFArgumentException("argmax takes exactly one argument: " + argOIs.length);
    }
    this.listOI = HiveUtils.asListOI(argOIs[0]);
    this.elemOI = HiveUtils.asPrimitiveObjectInspector(listOI.getListElementObjectInspector());

    this.result = new IntWritable();

    return PrimitiveObjectInspectorFactory.writableIntObjectInspector;
}
 

@Override
public ObjectInspector initialize(ObjectInspector[] argOIs) throws UDFArgumentException {
    if (argOIs.length != 1) {
        throw new UDFArgumentException("argmin takes exactly one argument: " + argOIs.length);
    }
    this.listOI = HiveUtils.asListOI(argOIs[0]);
    this.elemOI = HiveUtils.asPrimitiveObjectInspector(listOI.getListElementObjectInspector());

    this.result = new IntWritable();

    return PrimitiveObjectInspectorFactory.writableIntObjectInspector;
}
 

@Override
public ObjectInspector initialize(ObjectInspector[] argOIs) throws UDFArgumentException {
    if (argOIs.length != 2) {
        throw new UDFArgumentException("_FUNC_ takes exactly 2 arguments: " + argOIs.length);
    }
    this.lonOI = HiveUtils.asDoubleCompatibleOI(argOIs[0]);
    this.zoomOI = HiveUtils.asIntegerOI(argOIs[1]);

    this.result = new IntWritable();
    return PrimitiveObjectInspectorFactory.writableIntObjectInspector;
}
 

@Override
public ObjectInspector initialize(ObjectInspector[] argOIs) throws UDFArgumentException {
    if (argOIs.length != 2) {
        throw new UDFArgumentException("_FUNC_ takes exactly 2 arguments: " + argOIs.length);
    }
    this.latOI = HiveUtils.asDoubleCompatibleOI(argOIs[0]);
    this.zoomOI = HiveUtils.asIntegerOI(argOIs[1]);

    this.result = new IntWritable();
    return PrimitiveObjectInspectorFactory.writableIntObjectInspector;
}
 

@Override
public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
	if (arguments==null) {
     		throw new UDFArgumentLengthException("ethereumGetChainId only takes one argument: Struct<EthereumTransction> ");
	}
	if (arguments.length != 1) {
     		throw new UDFArgumentLengthException("ethereumGetChainId only takes one argument: Struct<EthereumTransction> ");
	}
	if (!(arguments[0] instanceof StructObjectInspector)) { 
	throw new UDFArgumentException("first argument must be a Struct containing a EthereumTransction");
	}
	this.ethereumUDFUtil=new EthereumUDFUtil((StructObjectInspector) arguments[0]);
	return PrimitiveObjectInspectorFactory.writableIntObjectInspector;
}
 

@Override
public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
    // Check if two arguments were passed
    if (arguments.length != ARG_COUNT) {
        throw new UDFArgumentLengthException(
                "The function array_slice(array, start, length) takes exactly " + ARG_COUNT + " arguments.");
    }

    // Check if ARRAY_IDX argument is of category LIST
    if (!arguments[ARRAY_IDX].getCategory().equals(ObjectInspector.Category.LIST)) {
        throw new UDFArgumentTypeException(ARRAY_IDX,
                "\"" + org.apache.hadoop.hive.serde.serdeConstants.LIST_TYPE_NAME + "\" "
                        + "expected at function array_slice, but "
                        + "\"" + arguments[ARRAY_IDX].getTypeName() + "\" "
                        + "is found");
    }

    arrayOI = (ListObjectInspector) arguments[ARRAY_IDX];
    arrayElementOI = arrayOI.getListElementObjectInspector();

    ObjectInspector expectOI = PrimitiveObjectInspectorFactory.writableIntObjectInspector;

    // Check if value and expect are of same type
    for (int i = 1; i < 3; i++) {
        if (!ObjectInspectorUtils.compareTypes(expectOI, arguments[i])) {
            throw new UDFArgumentTypeException(i,
                    "\"" + expectOI.getTypeName() + "\""
                            + " expected at function array_slice, but "
                            + "\"" + arguments[i].getTypeName() + "\""
                            + " is found");
        }
    }

    return ObjectInspectorFactory.getStandardListObjectInspector(arrayElementOI);
}
 

@Override
public ObjectInspector initialize(ObjectInspector[] argOIs) throws UDFArgumentException {
    if (argOIs.length != 2) {
        throw new UDFArgumentLengthException("Specify two arguments :" + argOIs.length);
    }

    if (HiveUtils.isListOI(argOIs[0]) && HiveUtils.isMapOI(argOIs[1])) {
        // feature_binning(array<features::string> features, map<string, array<number>> quantiles_map)

        if (!HiveUtils.isStringOI(
            ((ListObjectInspector) argOIs[0]).getListElementObjectInspector())) {
            throw new UDFArgumentTypeException(0,
                "Only array<string> type argument can be accepted but "
                        + argOIs[0].getTypeName() + " was passed as `features`");
        }
        featuresOI = HiveUtils.asListOI(argOIs[0]);
        featureOI = HiveUtils.asStringOI(featuresOI.getListElementObjectInspector());

        quantilesMapOI = HiveUtils.asMapOI(argOIs[1]);
        if (!HiveUtils.isStringOI(quantilesMapOI.getMapKeyObjectInspector())
                || !HiveUtils.isListOI(quantilesMapOI.getMapValueObjectInspector())
                || !HiveUtils.isNumberOI(
                    ((ListObjectInspector) quantilesMapOI.getMapValueObjectInspector()).getListElementObjectInspector())) {
            throw new UDFArgumentTypeException(1,
                "Only map<string, array<number>> type argument can be accepted but "
                        + argOIs[1].getTypeName() + " was passed as `quantiles_map`");
        }
        keyOI = HiveUtils.asStringOI(quantilesMapOI.getMapKeyObjectInspector());
        quantilesOI = HiveUtils.asListOI(quantilesMapOI.getMapValueObjectInspector());
        quantileOI =
                HiveUtils.asDoubleCompatibleOI(quantilesOI.getListElementObjectInspector());

        multiple = true;

        return ObjectInspectorFactory.getStandardListObjectInspector(
            PrimitiveObjectInspectorFactory.writableStringObjectInspector);
    } else if (HiveUtils.isPrimitiveOI(argOIs[0]) && HiveUtils.isListOI(argOIs[1])) {
        // feature_binning(number weight, array<number> quantiles)

        weightOI = HiveUtils.asDoubleCompatibleOI(argOIs[0]);

        quantilesOI = HiveUtils.asListOI(argOIs[1]);
        if (!HiveUtils.isNumberOI(quantilesOI.getListElementObjectInspector())) {
            throw new UDFArgumentTypeException(1,
                "Only array<number> type argument can be accepted but "
                        + argOIs[1].getTypeName() + " was passed as `quantiles`");
        }
        quantileOI =
                HiveUtils.asDoubleCompatibleOI(quantilesOI.getListElementObjectInspector());

        multiple = false;

        return PrimitiveObjectInspectorFactory.writableIntObjectInspector;
    } else {
        throw new UDFArgumentTypeException(0,
            "Only <array<features::string>, map<string, array<number>>> "
                    + "or <number, array<number>> type arguments can be accepted but <"
                    + argOIs[0].getTypeName() + ", " + argOIs[1].getTypeName()
                    + "> was passed.");
    }
}
 

@Test
public void testWritableIntFeature() throws Exception {
    List<IntWritable> x = Arrays.asList(new IntWritable(111), new IntWritable(222));
    ObjectInspector featureOI = PrimitiveObjectInspectorFactory.writableIntObjectInspector;
    testFeature(x, featureOI, IntWritable.class, Integer.class);
}
 

@Test
public void testWritableIntFeature() throws Exception {
    List<IntWritable> x = Arrays.asList(new IntWritable(111), new IntWritable(222));
    ObjectInspector featureOI = PrimitiveObjectInspectorFactory.writableIntObjectInspector;
    testFeature(x, featureOI, IntWritable.class, Integer.class);
}
 

public static ObjectInspector createWritableObjectInspector(TypeInfo info) {
  switch (info.getCategory()) {
    case PRIMITIVE:
      switch (((PrimitiveTypeInfo) info).getPrimitiveCategory()) {
        case FLOAT:
          return PrimitiveObjectInspectorFactory.writableFloatObjectInspector;
        case DOUBLE:
          return PrimitiveObjectInspectorFactory.writableDoubleObjectInspector;
        case BOOLEAN:
          return PrimitiveObjectInspectorFactory.writableBooleanObjectInspector;
        case BYTE:
          return PrimitiveObjectInspectorFactory.writableByteObjectInspector;
        case SHORT:
          return PrimitiveObjectInspectorFactory.writableShortObjectInspector;
        case INT:
          return PrimitiveObjectInspectorFactory.writableIntObjectInspector;
        case LONG:
          return PrimitiveObjectInspectorFactory.writableLongObjectInspector;
        case BINARY:
          return PrimitiveObjectInspectorFactory.writableBinaryObjectInspector;
        case STRING:
          return PrimitiveObjectInspectorFactory.writableStringObjectInspector;
        case TIMESTAMP:
          return PrimitiveObjectInspectorFactory.javaTimestampObjectInspector;
        default:
          throw new IllegalArgumentException("Unknown primitive type " +
            ((PrimitiveTypeInfo) info).getPrimitiveCategory());
      }
    case STRUCT:
      return new OrcStruct.OrcStructInspector((StructTypeInfo) info);
    case UNION:
      return new OrcUnion.OrcUnionObjectInspector((UnionTypeInfo) info);
    case MAP:
      return new OrcStruct.OrcMapObjectInspector((MapTypeInfo) info);
    case LIST:
      return new OrcStruct.OrcListObjectInspector((ListTypeInfo) info);
    default:
      throw new IllegalArgumentException("Unknown type " +
        info.getCategory());
  }
}
 

public static ObjectInspector craeteObjectInspectorFromTypeInfo( final TypeInfo typeInfo ){
  switch ( typeInfo.getCategory() ){
    case STRUCT:
      return new MDSStructObjectInspector( (StructTypeInfo)typeInfo );
    case MAP:
      return new MDSMapObjectInspector( (MapTypeInfo)typeInfo );
    case LIST:
      return new MDSListObjectInspector( (ListTypeInfo)typeInfo );
    case UNION:
      UnionTypeInfo unionTypeInfo = (UnionTypeInfo)typeInfo;
      List<ObjectInspector> unionList = new ArrayList<ObjectInspector>();
      for( TypeInfo childTypeInfo : unionTypeInfo.getAllUnionObjectTypeInfos() ){
        unionList.add( craeteObjectInspectorFromTypeInfo( childTypeInfo ) );
      }
      return ObjectInspectorFactory.getStandardUnionObjectInspector( unionList );
    case PRIMITIVE:
      PrimitiveTypeInfo primitiveTypeInfo = (PrimitiveTypeInfo)typeInfo;
      switch( primitiveTypeInfo.getPrimitiveCategory() ){
        case STRING:
          return PrimitiveObjectInspectorFactory.writableStringObjectInspector;
        case BINARY:
          return PrimitiveObjectInspectorFactory.writableBinaryObjectInspector;
        case BOOLEAN:
          return PrimitiveObjectInspectorFactory.writableBooleanObjectInspector;
        case BYTE:
          return PrimitiveObjectInspectorFactory.writableByteObjectInspector;
        case DOUBLE:
          return PrimitiveObjectInspectorFactory.writableDoubleObjectInspector;
        case FLOAT:
          return PrimitiveObjectInspectorFactory.writableFloatObjectInspector;
        case INT:
          return PrimitiveObjectInspectorFactory.writableIntObjectInspector;
        case LONG:
          return PrimitiveObjectInspectorFactory.writableLongObjectInspector;
        case SHORT:
          return PrimitiveObjectInspectorFactory.writableShortObjectInspector;

        case DATE:
        case DECIMAL:
        case TIMESTAMP:
        case VOID:
        default:
        throw new UnsupportedOperationException( "Unknown primitive category " + primitiveTypeInfo.getPrimitiveCategory() );
      }
    default:
      throw new UnsupportedOperationException( "Unknown category " + typeInfo.getCategory() );
  }
}