Package software.amazon.awssdk.enhanced.dynamodb.mapper

Class ImmutableAttribute<T,B,R>

java.lang.Object
software.amazon.awssdk.enhanced.dynamodb.mapper.ImmutableAttribute<T,B,R>
Type Parameters:
T - the class of the immutable item this attribute maps into.
B - the class of the builder for the immutable item this attribute maps into.
R - the class that the value of this attribute converts to.
@ThreadSafe public final class ImmutableAttribute<T,B,R> extends Object
A class that represents an attribute on an mapped immutable item. A StaticImmutableTableSchema composes multiple attributes that map to a common immutable item class.

The recommended way to use this class is by calling TableSchema.builder(Class, Class). Example: TableSchema.builder(Customer.class, Customer.Builder.class) .addAttribute(String.class, a -> a.name("customer_name").getter(Customer::name).setter(Customer.Builder::name)) // ... .build();

It's also possible to construct this class on its own using the static builder. Example: ImmutableAttribute<Customer, Customer.Builder, ?> customerNameAttribute = ImmutableAttribute.builder(Customer.class, Customer.Builder.class, String.class) .name("customer_name") .getter(Customer::name) .setter(Customer.Builder::name) .build();

  • Method Details

    • builder

      public static <T, B, R> ImmutableAttribute.Builder<T,B,R> builder(Class<T> itemClass, Class<B> builderClass, EnhancedType<R> attributeType)
      Constructs a new builder for this class using supplied types.
      Parameters:
      itemClass - The class of the immutable item that this attribute composes.
      builderClass - The class of the builder for the immutable item that this attribute composes.
      attributeType - A EnhancedType that represents the type of the value this attribute stores.
      Returns:
      A new typed builder for an attribute.

    • builder

      public static <T, B, R> ImmutableAttribute.Builder<T,B,R> builder(EnhancedType<T> itemType, EnhancedType<B> builderType, EnhancedType<R> attributeType)
      Constructs a new builder for this class using supplied types.
      Parameters:
      itemType - The EnhancedType of the immutable item that this attribute composes.
      builderType - The EnhancedType of the builder for the immutable item that this attribute composes.
      attributeType - A EnhancedType that represents the type of the value this attribute stores.
      Returns:
      A new typed builder for an attribute.

    • builder

      public static <T, B, R> ImmutableAttribute.Builder<T,B,R> builder(Class<T> itemClass, Class<B> builderClass, Class<R> attributeClass)
      Constructs a new builder for this class using supplied types.
      Parameters:
      itemClass - The class of the item that this attribute composes.
      builderClass - The class of the builder for the immutable item that this attribute composes.
      attributeClass - A class that represents the type of the value this attribute stores.
      Returns:
      A new typed builder for an attribute.

    • name

      public String name()
      The name of this attribute

    • getter

      public Function<T,R> getter()
      A function that can get the value of this attribute from a modelled immutable item it composes.

    • setter

      public BiConsumer<B,R> setter()
      A function that can set the value of this attribute on a builder for the immutable modelled item it composes.

    • tags

      public Collection<StaticAttributeTag> tags()
      A collection of StaticAttributeTag associated with this attribute.

    • type

      public EnhancedType<R> type()
      A EnhancedType that represents the type of the value this attribute stores.

    • attributeConverter

      public AttributeConverter<R> attributeConverter()
      A custom AttributeConverter that will be used to convert this attribute. If no custom converter was provided, the value will be null.
      See Also:
      • ImmutableAttribute.Builder.attributeConverter

    • toBuilder

      public ImmutableAttribute.Builder<T,B,R> toBuilder()
      Converts an instance of this class to a ImmutableAttribute.Builder that can be used to modify and reconstruct it.