Module jakarta.data

Package jakarta.data.metamodel

package jakarta.data.metamodel

A static metamodel for entities that are used in Jakarta Data repositories.

The StaticMetamodel allows for type-safe operations that avoid the need to hard-code entity attribute names as Strings. For example,

 @Entity
 public class Product {
     @Id
     public long id;

     public String name;

     public float price;
 }

 @StaticMetamodel(Product.class)
 public class _Product {
     public static volatile SortableAttribute<Product> id;
     public static volatile TextAttribute<Product> name;
     public static volatile SortableAttribute<Product> price);
 }

 ...

 @Repository
 Products products;

 ...

 Pagerequest<Product> pageRequest = Order.by(_Product.price.desc(),
                                           _Product.name.asc(),
                                           _Product.id.asc())
                                         .page(1)
                                         .size(20);

 page1 = products.findByNameLike(namePattern, pageRequest);

The module Javadoc provides an overview of Jakarta Data.