Hibernate Tips is a series of posts in which I describe a quick and easy solution for common Hibernate questions. If you have a question for a future Hibernate Tip, please post a comment below. Question: I’m using a query with a JOIN FETCH clause to load parent entities with all their child entities. The JPQL…
Hibernate Tips is a series of posts in which I describe a quick and easy solution for common Hibernate questions. If you have a question for a future Hibernate Tip, please post a comment below. Question: This Hibernate Tip was inspired by a question I answered on Stack Overflow. The user had to map a…
JPA 2.1 introduced the annotation-based Named Entity Graphs and the Entity Graph API. They provide query-independent ways to define which entity attributes Hibernate shall fetch from the database. And while you can’t omit eagerly fetched associations or attributes with Hibernate, you can specify a query-specific eager loading for a graph of associations. Sounds great, doesn’t…
Hibernate Tips is a series of posts in which I describe a quick and easy solution for common Hibernate questions. If you have a question for a future Hibernate Tip, please post a comment below. Question: I’m working with a legacy database that stores booleans as the characters ‘Y’ and ‘N’. What’s the easiest way…
The implementation of the equals() and hashCode() methods for entity classes is an often discussed question. Do you really need them? There are lots of applications that work perfectly fine using Java’s default methods provided by the Object class. And if you need to implement them, how should you do that? Should you use all attributes…
