Professional Java for Web Applications

Chapter 20Mapping Entities to Tables with JPA Annotations

IN THIS CHAPTER

• Understanding and working with simple entities
• Designing and utilizing a persistence unit
• How to map complex data types

WROX.COM CODE DOWNLOADS FOR THIS CHAPTER

You can find the wrox.com code downloads for this chapter at http://www.wrox.com/go/projavaforwebapps on the Download Code tab. All the code for this chapter is contained within the following examples:

• Entity-Mappings Project
• Enums-Dates-Lobs Project

NEW MAVEN DEPENDENCIES FOR THIS CHAPTER

In addition to the Maven dependencies introduced in previous chapters, you also need the following Maven dependencies. The Hibernate persistence API and JBoss transaction API transient dependencies are excluded because they conflict with the standard dependencies already declared. The XML API dependency is excluded because it is already part of Java SE 7 and newer. Finally, JBoss Logging is excluded not out of necessity, but out of clarity, because a dependency on a newer version was declared in an earlier chapter.

        <dependency>
            <groupId>org.eclipse.persistence</groupId>
            <artifactId>javax.persistence</artifactId>
            <version>2.1.0</version>
            <scope>compile</scope>
        </dependency>
 
        <dependency>
            <groupId>javax.transaction</groupId> <artifactId>javax.transaction-api</artifactId> <version>1.2</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> <version>4.3.1.Final</version> <scope>runtime</scope> ...