Describe the feature

An @ConvertedBy annotation for attributes that the generator can use without defining the entire ItemConverter

Is your feature request related to a problem?

If would be great if we didn't need to define the entire Item converter when just one attribute needs a custom value converter.

Currently as documented with the DynamoDB Mapper when a custom item converter is needed a value converter must be created and then an ItemConverter needs to be created for the entire model. If I could annotate one attribute and the generator would honor it, it would save a lot of boilerplate.

Proposed Solution

@DynamoDbItem
data class Employee(
 @DynamoDbPartitionKey
 val id: Int,
 
 val name: String,
 val role: String,
 # Proposed Annotation
 @ConvertedBy(UuidValueConverter::class)
 val workstationId: Uuid,
)
public val UuidValueConverter = object : ValueConverter<Uuid> {
 override fun convertFrom(to: AttributeValue): Uuid = 
 Uuid.parseHex(to.asS())
 
 override fun convertTo(from: Uuid): AttributeValue = 
 AttributeValue.S(from.toHexString())
}

Describe alternative solutions or features you've considered

No response

Acknowledge

• I may be able to implement this feature request

AWS SDK for Kotlin version

1.3.66-beta

Platform (JVM/JS/Native)

JVM

Operating system and version

AL2023