import org.apache.hadoop.hive.serde2.objectinspector.primitive.HiveCharObjectInspector; //导入依赖的package包/类
@Override
public void setSafeValue(ObjectInspector oi, Object hiveFieldValue, ValueVector outputVV, int outputIndex) {
  final Text value = ((HiveCharObjectInspector)oi).getPrimitiveWritableObject(hiveFieldValue).getStrippedValue();
  final byte[] valueBytes = value.getBytes();
  final int valueLen = value.getLength();
  ((NullableVarCharVector) outputVV).getMutator().setSafe(outputIndex, valueBytes, 0, valueLen);
}
 

import org.apache.hadoop.hive.serde2.objectinspector.primitive.HiveCharObjectInspector; //导入依赖的package包/类
@Override
public Object evaluate(DeferredObject[] arguments) throws HiveException {
  if (arguments[0] == null || arguments[0].get() == null) {
    return null;
  }

  Object input = arguments[0].get();
  switch(inputType) {
    case BOOLEAN:
      return ((BooleanObjectInspector)argumentOI).get(input) ? Boolean.TRUE : Boolean.FALSE;
    case BYTE:
      return new Byte(((ByteObjectInspector)argumentOI).get(input));
    case SHORT:
      return new Short(((ShortObjectInspector)argumentOI).get(input));
    case INT:
      return new Integer(((IntObjectInspector)argumentOI).get(input));
    case LONG:
      return new Long(((LongObjectInspector)argumentOI).get(input));
    case FLOAT:
      return new Float(((FloatObjectInspector)argumentOI).get(input));
    case DOUBLE:
      return new Double(((DoubleObjectInspector)argumentOI).get(input));
    case STRING:
      return PrimitiveObjectInspectorUtils.getString(input, (StringObjectInspector)argumentOI);
    case BINARY:
      return PrimitiveObjectInspectorUtils.getBinary(input, (BinaryObjectInspector) argumentOI).getBytes();
    case VARCHAR:
      if (outputType == PrimitiveCategory.CHAR) {
        HiveVarchar hiveVarchar = PrimitiveObjectInspectorUtils.getHiveVarchar(input, (HiveVarcharObjectInspector) argumentOI);
        return new HiveChar(hiveVarchar.getValue(), HiveChar.MAX_CHAR_LENGTH);
      } else {
        return PrimitiveObjectInspectorUtils.getHiveVarchar(input, (HiveVarcharObjectInspector)argumentOI);
      }
    case CHAR:
      return PrimitiveObjectInspectorUtils.getHiveChar(input, (HiveCharObjectInspector) argumentOI);
    case DATE:
      return PrimitiveObjectInspectorUtils.getDate(input, (DateObjectInspector) argumentOI);
    case TIMESTAMP:
      return PrimitiveObjectInspectorUtils.getTimestamp(input, (TimestampObjectInspector) argumentOI);
    case DECIMAL:
      // return type is a HiveVarchar
      HiveDecimal decimalValue =
          PrimitiveObjectInspectorUtils.getHiveDecimal(input, (HiveDecimalObjectInspector) argumentOI);
      return new HiveVarchar(decimalValue.toString(), HiveVarchar.MAX_VARCHAR_LENGTH);
  }

  throw new UnsupportedOperationException(String.format("Unexpected input type '%s' in Test UDF", inputType));
}