In this chapter, we will explore mapping concepts. This is at the core of the Object-Relational Mapping challenge to correctly map Java objects and classes to their persistence representation. As discussed in the previous chapter, the object-oriented world has a lot in common with the relational world, attributes, types, and so on. The ORM solutions, such as Hibernate, were created to address their notable differences, inheritance, composition, object reference and identification, and much more. After reading this chapter, you will be able to correctly map database identification to a class attribute using primitive data types or a more complex Java class. You will also see how to create associations between objects and annotate them correctly so that Hibernate has enough information about the relationships between table data. Furthermore, you will be able to instruct Hibernate to perform cascaded operations and map classes as part of an inheritance model. Finally...
Overview of this book
Hibernate has been so successful since its inception that it even influenced the Java Enterprise Edition specification in that the Java Persistence API was dramatically changed to do it the Hibernate way. Hibernate is the tool that solves the complex problem of Object Relational Mapping. It can be used in both Java Enterprise applications as well as .Net applications. Additionally, it can be used for both SQL and NoSQL data stores. Some developers learn the basics of Hibernate and hit the ground quickly. But when demands go beyond the basics, they take a reactive approach instead of learning the fundamentals and core concepts. However, the secret to success for any good developer is knowing and understanding the tools at your disposal. It’s time to learn about your tool to use it better This book first explores the internals of Hibernate by discussing what occurs inside a Hibernate session and how Entities are managed. Then, we cover core topics such as mapping, querying, caching, and we demonstrate how to use a wide range of very useful annotations. Additionally, you will learn how to create event listeners or interceptors utilizing the improved architecture in the latest version of Hibernate.
Table of Contents (16 chapters)
About the Author
About the Reviewers
Entity and Session
Working with Annotations
Events, Interceptors, and Envers