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JPA Metamodel API

The JPA Metamodel API provides the ability to examine the persistent object model and retrieve details on managed classes and persistent fields and properties, similarly to the ability that Java reflection provides for general Java types. The Metamodel Interface The main interface of the JPA
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JPA Annotations for Access Modes

Persistence fields can either be accessed by JPA directly (as fields) or indirectly (as properties and get/set methods). JPA 2 provides an annotation and an enum for setting the access mode: More details are provided in chapter 2 of the ObjectDB manual.
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JPA Annotations for Mapping (ORM)

The following JPA annotations and enums are designated for mapping a JPA object model to a relational database, and are not required by ObjectDB: ObjectDB silently ignores all the above annotations.
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JPA Metamodel API Attributes

The 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.
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JPA Metamodel API Types

The following interfaces and enum represent types in the JPA Metamodel API: See the Metamodel Type Interface Hierarchy section for more details and examples.
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JPA Lifecycle Events

Callback methods are user defined methods that are attached to entity lifecycle events and are invoked automatically by JPA when these events occur. Internal Callback Methods Internal callback methods are methods that are defined within an entity class. For example, the following entity class
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Getting Started with JPA - Eclipse Project

To open and run the Quick Start with JPA tutorial project in Eclipse: Download and extract the project zip file: Getting Started with JPA - Maven Project (3KB) Open the Maven project in Eclipse: Select File > Import... > Maven > Existing Maven Projects and click Next. Select the points-console
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Spring MVC JPA Tutorial - IntelliJ Project

To open and run the Spring MVC JPA tutorial project in Download and extract the project zip file: Spring MVC JPA - Maven Project (8KB) Open the project in IntelliJ IDEA: Select File > Open Project.... Select the guestbook-spring directory and click OK. Define the Server: Select File > Settings
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Step 2: Define a JPA Entity Class

To 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 project node (in the [Package Explorer] window ... . The next step is adding a context listener class that will manage a JPA's EntityManagerFactory representing the ObjectDB database.
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Java EE 6 JPA Tutorial - IntelliJ Project

To open and run the Java EE 6 Web Application tutorial project in IntelliJ IDEA: Download and extract the project zip file: Java EE JPA Web App - Maven Project (7KB) Open the project in IntelliJ IDEA: Select File > Open Project.... Select the guestbook-jee6 directory and click OK. Define the Server

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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