Hibernate Mapping One-to-One using Annotations
Learn how to do one-to-one mapping using hibernate annotations.
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Welcome to Hibernate Tutorial Series. In previous tutorials we saw how to implement Relationship Mapping in Hibernate. We saw different mapping techniques like One to Many, Many to Many using both Annotations and XML mapping. Today we will see how the Inheritance is managed in Hibernate. You may want to look at previous tutorials. Here is the complete list for you.
Learn how to do many-to-many mapping using hibernate annotations.
Find out how to to do many-to-one mapping using hibernate annotations.
Hibernate was started in 2001 by Gavin King as an alternative to using EJB2-style entity beans. Its mission back then was to simply offer better persistence capabilities than offered by EJB2 by simplifying the complexities and allowing for missing features. Hibernate used its mapping files and configuration files to achieve its objectives. With the introduction of annotations in java community with JDK 1.5, Hibernate community started working on Hibernate 3, which has support for annotations.
If you are working on any hibernate project or you are planning to work on any in future, then you can easily understand the one-to-one relationships between several entities in your application. In this post, i will discuss variations of one-to-one mappings supported in hibernate.
Many to many mapping is made between two entities where one can have relation with multiple other entity instances. For example, for a subscription service SubscriptionEntity and ReaderEntity can be two type of entities. Any subscription can have multiple readers, where a reader can subscribe to multiple subscriptions. In this post, we will learn to make such mapping in database using hibernate 3.
One to many mapping is made between two entities where first entity can have relation with multiple second entity instances but second can be associated with only one instance of first entity. Its 1 to n relationship. For example, in any company an employee can register multiple bank accounts but one bank account will be associated with one and only one employee. In this post, we will learn to make such mapping in database using hibernate 3.
See how to do one-to-many mapping using hibernate annotations.
Component mapping using hibernate annotations.
By Wikipedia definition, Lazy loading is a design pattern commonly used in computer programming to defer initialization of an object until the point at which it is needed. We know that in hibernate lazy loading can be done by specifying “fetch= FetchType.LAZY” in hibernate mapping annotations.