protected static void writeStructValue()

in athena-federation-sdk/src/main/java/com/amazonaws/athena/connector/lambda/data/BlockUtils.java [814:950]
133 lines of code
35 McCabe index (conditional complexity)

    protected static void writeStructValue(StructWriter writer, Field field, BufferAllocator allocator, Object value)
    {
        if (value == null) {
            return;
        }

        ArrowType type = field.getType();
        try {
            switch (Types.getMinorTypeForArrowType(type)) {
                case DATEMILLI:
                    if (value instanceof Date) {
                        writer.dateMilli(field.getName()).writeDateMilli(((Date) value).getTime());
                    }
                    else {
                        writer.dateMilli(field.getName()).writeDateMilli((long) value);
                    }
                    break;

                case DATEDAY:
                    if (value instanceof Date) {
                        org.joda.time.Days days = org.joda.time.Days.daysBetween(EPOCH,
                                new org.joda.time.DateTime(((Date) value).getTime()));
                        writer.dateDay(field.getName()).writeDateDay(days.getDays());
                    }
                    else if (value instanceof LocalDate) {
                        int days = (int) ((LocalDate) value).toEpochDay();
                        writer.dateDay(field.getName()).writeDateDay(days);
                    }
                    else if (value instanceof Long) {
                        writer.dateDay(field.getName()).writeDateDay(((Long) value).intValue());
                    }
                    else {
                        writer.dateDay(field.getName()).writeDateDay((int) value);
                    }
                    break;
                case FLOAT8:
                    writer.float8(field.getName()).writeFloat8((double) value);
                    break;
                case FLOAT4:
                    writer.float4(field.getName()).writeFloat4((float) value);
                    break;
                case INT:
                    if (value != null && value instanceof Long) {
                        //This may seem odd at first but many frameworks (like Presto) use long as the preferred
                        //native java type for representing integers. We do this to keep type conversions simple.
                        writer.integer(field.getName()).writeInt(((Long) value).intValue());
                    }
                    else {
                        writer.integer(field.getName()).writeInt((int) value);
                    }
                    break;
                case TINYINT:
                    writer.tinyInt(field.getName()).writeTinyInt((byte) value);
                    break;
                case SMALLINT:
                    writer.smallInt(field.getName()).writeSmallInt((short) value);
                    break;
                case UINT1:
                    writer.uInt1(field.getName()).writeUInt1((byte) value);
                    break;
                case UINT2:
                    writer.uInt2(field.getName()).writeUInt2((char) value);
                    break;
                case UINT4:
                    writer.uInt4(field.getName()).writeUInt4((int) value);
                    break;
                case UINT8:
                    writer.uInt8(field.getName()).writeUInt8((long) value);
                    break;
                case BIGINT:
                    writer.bigInt(field.getName()).writeBigInt((long) value);
                    break;
                case VARBINARY:
                    if (value instanceof ArrowBuf) {
                        ArrowBuf buf = (ArrowBuf) value;
                        writer.varBinary(field.getName()).writeVarBinary(0, buf.capacity(), buf);
                    }
                    else if (value instanceof byte[]) {
                        byte[] bytes = (byte[]) value;
                        try (ArrowBuf buf = allocator.buffer(bytes.length)) {
                            buf.writeBytes(bytes);
                            writer.varBinary(field.getName()).writeVarBinary(0, buf.readableBytes(), buf);
                        }
                    }
                    break;
                case DECIMAL:
                    int scale = ((ArrowType.Decimal) type).getScale();
                    int precision = ((ArrowType.Decimal) type).getPrecision();
                    if (value instanceof Double) {
                        BigDecimal bdVal = new BigDecimal((double) value);
                        bdVal = bdVal.setScale(scale, RoundingMode.HALF_UP);
                        writer.decimal(field.getName(), scale, precision).writeDecimal(bdVal);
                    }
                    else {
                        BigDecimal scaledValue = ((BigDecimal) value).setScale(scale, RoundingMode.HALF_UP);
                        writer.decimal(field.getName(), scale, precision).writeDecimal(scaledValue);
                    }
                    break;
                case VARCHAR:
                    if (value instanceof String) {
                        byte[] bytes = ((String) value).getBytes(Charsets.UTF_8);
                        try (ArrowBuf buf = allocator.buffer(bytes.length)) {
                            buf.writeBytes(bytes);
                            writer.varChar(field.getName()).writeVarChar(0, buf.readableBytes(), buf);
                        }
                    }
                    else if (value instanceof ArrowBuf) {
                        ArrowBuf buf = (ArrowBuf) value;
                        writer.varChar(field.getName()).writeVarChar(0, buf.readableBytes(), buf);
                    }
                    else if (value instanceof byte[]) {
                        byte[] bytes = (byte[]) value;
                        try (ArrowBuf buf = allocator.buffer(bytes.length)) {
                            buf.writeBytes(bytes);
                            writer.varChar(field.getName()).writeVarChar(0, buf.readableBytes(), buf);
                        }
                    }
                    break;
                case BIT:
                    if (value instanceof Integer && (int) value > 0) {
                        writer.bit(field.getName()).writeBit(1);
                    }
                    else if (value instanceof Boolean && (boolean) value) {
                        writer.bit(field.getName()).writeBit(1);
                    }
                    else {
                        writer.bit(field.getName()).writeBit(0);
                    }
                    break;
                default:
                    throw new IllegalArgumentException("Unknown type " + type);
            }
        }
        catch (RuntimeException ex) {
            throw new RuntimeException("Unable to write value for field " + field.getName() + " using value " + value, ex);
        }
    }