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.

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();

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ImmutableAttribute.Builder<T,B,R> A typed builder for ImmutableAttribute.

Method Summary

Modifier and Type	Method and Description
AttributeConverter<R>	attributeConverter() A custom AttributeConverter that will be used to convert this attribute.
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.
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.
Function<T,R>	getter() A function that can get the value of this attribute from a modelled immutable item it composes.
String	name() The name of this attribute
BiConsumer<B,R>	setter() A function that can set the value of this attribute on a builder for the immutable modelled item it composes.
Collection<StaticAttributeTag>	tags() A collection of StaticAttributeTag associated with this attribute.
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.
EnhancedType<R>	type() A EnhancedType that represents the type of the value this attribute stores.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

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(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.