Book Image

Java Hibernate Cookbook

By : Yogesh Prajapati, Vishal Ranapariya
Book Image

Java Hibernate Cookbook

By: Yogesh Prajapati, Vishal Ranapariya

Overview of this book

This book will provide a useful hands-on guide to Hibernate to accomplish the development of a real-time Hibernate application. We will start with the basics of Hibernate, which include setting up Hibernate – the pre-requisites and multiple ways of configuring Hibernate using Java. We will then dive deep into the fundamentals of Hibernate such as SessionFactory, session, criteria, working with objects and criteria. This will help a developer have a better understanding of how Hibernate works and what needs to be done to run a Hibernate application. Moving on, we will learn how to work with annotations, associations and collections. In the final chapters, we will see explore querying, advanced Hibernate concepts and integration with other frameworks.
Table of Contents (15 chapters)
Java Hibernate Cookbook
About the Authors
About the Reviewers

Working with the table per subclass strategy of inheritance

In the previous recipe, we went through the table per class hierarchy inheritance strategy. Table per class hierarchy stores all the rows in a single table and the discriminator column is used to uniquely identify the records. Sometimes, the tables become very large if the hierarchy is deep. In such a case, we can use another strategy called table per subclass.

In the table-per-subclass strategy, hibernate creates separate tables for each class. The relationship exists between the parent and child tables, where the common data is stored in the parent class and the data of the subclass is stored in a separate specific table.

Getting ready

Consider a new table structure as shown in the following table:

Creating the classes

Update the following code in their respective files:

Source file:

public class Employee {