4 | JPA Metamodel API AttributesThe following interfaces and enum types represent attributes (persistent fields and properties) in the JPA Metamodel API: See the Metamodel Attribute Interface Hierarchy section for more details and examples. |
4 | ORDER BY clause (JPQL / Criteria API) JPQL expression whose type is comparable (i.e. numbers, strings and date values) and is derived |
4 | JPA Queries a cleaner alternative that enables building a dynamic query by using instances of special types |
4 | WHERE clause (JPQL / Criteria API))); Multiple Restrictions The second where method takes a variable number of arguments of Predicate type |
4 | Detached Entity Objects. same type and primary key). If the EntityManager does not manage such an entity object yet a new |
4 | JPA Annotations for ClassesJPA defines three types of persistable classes which are set by the following annotations: Chapter 2 of the ObjectDB manual explains these annotations in detail. Entity and mapped super classes can be further configured by annotations that specify cache preferences and lifecycle event listener |
4 | JPA Annotations for Relationships annotation enables configuring cascade and fetch policy, using the following enum types: Additional |
4 | ObjectDB Overview. Can easily be embedded in applications of any type and size. Tested with Tomcat, Jetty, GlassFish, JBoss |
4 | Retrieving JPA Entity Objects retrieval by using a lazy fetch type: @Entity class Employee { : @ManyToOne(fetch=FetchType |
0 | Step 2: Entity Class and Persistence Unit/xml/ns/persistence/persistence_2_0.xsd"> <persistence-unit name="GuestbookPU" transaction-type |
