@ThreadSafe @Immutable public final class OptionalIntAttributeConverter extends Object implements AttributeConverter<OptionalInt>
OptionalInt
and AttributeValue
.
This stores values in DynamoDB as a number.
This supports reading numbers between Integer.MIN_VALUE
and Integer.MAX_VALUE
from DynamoDB. Null values are
converted to OptionalInt.empty()
. For larger numbers, consider using the OptionalLongAttributeConverter
or
the OptionalAttributeConverter
along with a BigInteger
. For shorter numbers, consider using the
OptionalAttributeConverter
along with a Short
type.
This does not support reading decimal numbers. For decimal numbers, consider using OptionalDoubleAttributeConverter
,
or the OptionalAttributeConverter
with a Float
or BigDecimal
. Decimal numbers will cause a
NumberFormatException
on conversion.
This can be created via create()
.
Modifier and Type | Method and Description |
---|---|
AttributeValueType |
attributeValueType()
The
AttributeValueType that a converter stores and reads values
from DynamoDB via the AttributeValue class. |
static OptionalIntAttributeConverter |
create() |
AttributeValue |
transformFrom(OptionalInt input)
Convert the provided Java object into an
AttributeValue . |
OptionalInt |
transformTo(AttributeValue input)
Convert the provided
AttributeValue into a Java object. |
EnhancedType<OptionalInt> |
type()
The type supported by this converter.
|
public EnhancedType<OptionalInt> type()
AttributeConverter
type
in interface AttributeConverter<OptionalInt>
public AttributeValueType attributeValueType()
AttributeConverter
AttributeValueType
that a converter stores and reads values
from DynamoDB via the AttributeValue
class.attributeValueType
in interface AttributeConverter<OptionalInt>
public static OptionalIntAttributeConverter create()
public AttributeValue transformFrom(OptionalInt input)
AttributeConverter
AttributeValue
. This will raise a RuntimeException
if the
conversion fails, or the input is null.
Example:
InstantAsStringAttributeConverter converter = InstantAsStringAttributeConverter.create();
assertEquals(converter.transformFrom(Instant.EPOCH),
EnhancedAttributeValue.fromString("1970-01-01T00:00:00Z").toAttributeValue());
transformFrom
in interface AttributeConverter<OptionalInt>
public OptionalInt transformTo(AttributeValue input)
AttributeConverter
AttributeValue
into a Java object. This will raise a RuntimeException
if the
conversion fails, or the input is null.
Example:
InstantAsStringAttributeConverter converter = InstantAsStringAttributeConverter.create();
assertEquals(converter.transformTo(EnhancedAttributeValue.fromString("1970-01-01T00:00:00Z").toAttributeValue()),
Instant.EPOCH);
transformTo
in interface AttributeConverter<OptionalInt>
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