38 | CRUD Operations with JPAThe following subsections explain how to use JPA for CRUD database operations: |
38 | JPA Annotations for FieldsThe way a field of a persistable class is managed by JPA can be set by the following annotations: Additional annotations (and enum) are designated for enum fields: Other additional annotations (and enum) are designated for date and calendar fields: Chapter 2 of the ObjectDB manual explains how to use all the above annotations. |
38 | DELETE Queries in JPA/JPQL.Object class in queries (as an extension to JPA), so the following query can be used to delete |
38 | JPA Annotations for Callback MethodsThe following annotations can mark methods as JPA callback methods: The Lifecycle Events section of the ObjectDB Manual explains how to use all these annotations on callback methods and with listener classes. |
38 | JPA Annotations for RelationshipsRelationships are persistent fields in persistable classes that reference other entity objects. The four relationship modes are represented by the following annotations: Unlike ORM JPA implementations, ObjectDB does not enforce specifying any of the annotations above. Specifying a relationship |
38 | Storing JPA Entity Objects setting the ObjectDB configuration or in a JPA portable way, by specifying the cascade-persist XML |
7 | Java EE 6 JPA Tutorial - NetBeans ProjectTo open and run the Java EE 6 Web Application tutorial project in NetBeans: Download and extract the project zip file: Java EE JPA Web App - Maven Project (7KB) Open the Maven project in NetBeans: Select File > Open Project.... Select the guestbook-jee6 directory and click Open Project. Run |
7 | Step 2: Define a JPA Entity ClassTo store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New Java Class] dialog box, e.g. by right clicking the tutorial package node (in the [Projects] window) and selecting New > Java Class... Enter Point as the class name - use exactly that case sensitive |
7 | Java EE 6 JPA Tutorial - Eclipse ProjectTo open and run the Java EE 6 Web Application tutorial project in Eclipse: Download and extract the project zip file: Java EE JPA Web App - Maven Project (7KB) Open the Maven project in Eclipse: Select File > Import... > Maven > Existing Maven Projects and click Next. Select the guestbook-jee6 |
7 | Step 2: Define a JPA Entity ClassTo store objects in an ObjectDB database using JPA we need to define an entity class: Right click on the project in the [Package Explorer] window and select New > Class. Enter tutorial as the package name (case sensitive). Enter Point as the class name (case sensitive). Click Finish to create |
