private JsonToRowDataConverter createNotNullConverter(LogicalType type) {
        switch (type.getTypeRoot()) {
            case NULL:
                return jsonNode -> null;
            case BOOLEAN:
                return this::convertToBoolean;
            case TINYINT:
                return jsonNode -> Byte.parseByte(jsonNode.asText().trim());
            case SMALLINT:
                return jsonNode -> Short.parseShort(jsonNode.asText().trim());
            case INTEGER:
            case INTERVAL_YEAR_MONTH:
                return this::convertToInt;
            case BIGINT:
            case INTERVAL_DAY_TIME:
                return this::convertToLong;
            case DATE:
                return this::convertToDate;
            case TIME_WITHOUT_TIME_ZONE:
                return this::convertToTime;
            case TIMESTAMP_WITHOUT_TIME_ZONE:
                return this::convertToTimestamp;
            case TIMESTAMP_WITH_LOCAL_TIME_ZONE:
                if (adaptSpark) {
                    return jsonNode -> {
                        try {
                            return convertToTimestampWithLocalZone(jsonNode);
                        } catch (DateTimeParseException e) {
                            return convertToTimestamp(jsonNode);
                        }
                    };
                }
                return this::convertToTimestampWithLocalZone;
            case FLOAT:
                return this::convertToFloat;
            case DOUBLE:
                return this::convertToDouble;
            case CHAR:
            case VARCHAR:
                return this::convertToString;
            case BINARY:
            case VARBINARY:
                return this::convertToBytes;
            case DECIMAL:
                return createDecimalConverter((DecimalType) type);
            case ARRAY:
                return createArrayConverter((ArrayType) type);
            case MAP:
                MapType mapType = (MapType) type;
                return createMapConverter(
                        mapType.asSummaryString(), mapType.getKeyType(), mapType.getValueType());
            case MULTISET:
                MultisetType multisetType = (MultisetType) type;
                return createMapConverter(
                        multisetType.asSummaryString(),
                        multisetType.getElementType(),
                        new IntType());
            case ROW:
                return createRowConverter((RowType) type);
            case RAW:
            default:
                throw new UnsupportedOperationException("Unsupported type: " + type);
        }
    }
Creates a runtime converter which assuming input object is not null.
inlong-sort/sort-flink/base/src/main/java/org/apache/inlong/sort/base/format/JsonToRowDataConverters.java