In my <a href="http://blog.springsource.com/2011/02/10/getting-started-with-spring-data-jpa">last blog post I introduced the basic feature set of Spring Data JPA. In this post I’d like to dive into some more features and how they can help you simplify data access layer implementation even further. The Spring Data repository abstraction consists of an interface based programming model, some factory classes and a Spring namespace to easily configure the infrastructure. A typical repository interface looks something like this:
<code class="prettyprint java">public interface CustomerRepository extends JpaRepository<Customer, Long> {

 Customer findByEmailAddress(String emailAddress);

 List findByLastname(String lastname, Sort sort);

 Page findByFirstname(String firstname, Pageable pageable);
}

Learn how to implement a Search / Query Language for your Spring REST API.