TableSchema.converterForAttribute() returns wrong generic type

Describe the bug

The TableSchema<T> interface has a method, converterForAttribute(Object key), which returns an AttributeConverter<T>. This AttributeConverter is meant to convert the attribute behind the given key. Unfortunately, the generic type here (T) is the type for the table record, not for the attribute.

If I have the following DynamoDbBean (non-compilable, just for explanation purposes):

@DynamoDbBean
public class ShoppingCartItem{
    public static final String CUSTOMER_ID_SECONDARY_INDEX_NAME = "shopping_cart_item_by_customer_id";

    private UUID customerId;

    @DynamoDbSecondaryPartitionKey(indexNames = CUSTOMER_ID_SECONDARY_INDEX_NAME)
    public UUID getCustomerId() {
        return customerId;
    }
}

If then create a corresponding DynamoDbTable<ShoppingCartItem> and try fetching the converter for the secondary partition key:

DynamoDbTable<ShoppingCartItem> table = ...;

String partitionKey = table.tableSchema().tableMetadata().indexPartitionKey(ShoppingCartItem.CUSTOMER_ID_SECONDARY_INDEX_NAME);

AttributeConverter<ShoppingCartItem> converter = table.tableSchema().converterForAttribute(partitionKey);

The AttributeConverter returned is of type AttributeConverter<ShoppingCartItem> instead of type AttributeConverter<UUID>. This makes it impossible to use the TableSchema to fetch the corresponding AttributeConverter, because it will always return an AttributeConverter scoped to the type of the table, not of the attribute.

Expected Behavior

TableSchema.converterForAttribute(Object key) should return a generic type other than AttributeConverter<T> so callers can use it properly.

Current Behavior

Described above.

Reproduction Steps

Described above.

Possible Solution

Change the return type of TableSchema.converterForAttribute(Object key).

Additional Information/Context

No response

AWS Java SDK version used

dynamodb-enhanced-2.20.56

JDK version used

1.8

Operating System and version

macOS 13.3.1

Commencez au point d’entrée TableSchema.converterForAttribute(Object key) et suivez sa déclaration, ses implémentations et ses appelants dans le module enhanced DynamoDB. Vérifiez le contrat générique avec l’exemple ShoppingCartItem : une clé de partition secondaire prise en charge par UUID devrait fournir un AttributeConverter sans affecter les autres utilisateurs de TableSchema.