Package io.deephaven.util.codec

Interface ObjectCodec<TYPE>

All Superinterfaces:

ObjectDecoder<TYPE>

All Known Implementing Classes:

BigDecimalCodec, BigDecimalParquetBytesCodec, BigIntegerCodec, BigIntegerParquetBytesCodec, ExternalizableCodec, LocalDateCodec, LocalTimeCodec, MapCodec, RowSetCodec, SerializableCodec, SimpleByteArrayCodec, StringBooleanMapCodec, StringDoubleMapCodec, StringFloatMapCodec, StringIntMapCodec, StringLongMapCodec, StringStringMapCodec, UTF8StringAsByteArrayCodec, ZonedDateTimeCodec

public interface ObjectCodec<TYPE>
extends ObjectDecoder<TYPE>

Codec interface for Object translation to/from byte arrays for serialization and deserialization.

Implementations must follow several rules to enable correct usage:

1. They must be stateless or designed for concurrent use (e.g. by using only ThreadLocal state), as they will generally be cached and re-used.
2. They must not modify their inputs in any way, retain references to their inputs, or return results that retain references to their inputs.
3. They should provide a public constructor that takes a single String argument, in order to allow configuration-driven reflective instantiation.

Field Summary

Fields inherited from interface io.deephaven.util.codec.ObjectDecoder

VARIABLE_WIDTH_SENTINEL

Method Summary

Modifier and Type	Method	Description
byte @NotNull []	encode(TYPE input)	Encode the specified input as an array of bytes.
int	getPrecision()	If applicable, the maximum encodable precision.
int	getScale()	If applicable, the maximum encodable scale.
boolean	isNullable()	Does this codec support encoding of null values?

Methods inherited from interface io.deephaven.util.codec.ObjectDecoder

checkWidth, decode, decode, expectedObjectWidth

Method Details

encode

byte @NotNull [] encode(@Nullable
 TYPE input)

Encode the specified input as an array of bytes. Note that it is up to the implementation how to encode null inputs. The use of a zero-length byte array is strongly encouraged.

Parameters:

input - The input object, possibly null

Returns:

The output byte array

isNullable

boolean isNullable()

Does this codec support encoding of null values?

Returns:

if null values are supported

getPrecision

int getPrecision()

If applicable, the maximum encodable precision. If precision is not applicable (i.e. for non-numeric types) this method should return zero.

Returns:

the numeric precision supported by this codec

getScale

int getScale()

If applicable, the maximum encodable scale. If scale is not applicable (i.e. for non-numeric types) this method should return zero.

Returns:

the numeric scale (digits after the decimal point) supported by this codec