Menu
I've been trying to find a JPA Criteria API tutorial but haven't been much successful. Do you know about any for beginners? I'd like to start using it in an Java5/Maven app to build complex search queries.
859
The Criteria API allows us to build up a criteria query object programmatically, where we can apply different kinds of filtration rules and logical conditions. Since Hibernate 5.2, the Hibernate Criteria API is deprecated, and new development is focused on the JPA Criteria API.
The Criteria API is a predefined API used to define queries for entities. It is the alternative way of defining a JPQL query. These queries are type-safe, and portable and easy to modify by changing the syntax.
Restrictions with Criteria Criteria cr = session. createCriteria(Employee. class); Criterion salary = Restrictions.gt("salary", 2000); Criterion name = Restrictions. ilike("firstNname","zara%"); // To get records matching with OR conditions LogicalExpression orExp = Restrictions.or(salary, name); cr.
Hibernate offers an older, legacy org. hibernate.Criteria API which should be considered deprecated. No feature development will target those APIs. Eventually, Hibernate-specific criteria features will be ported as extensions to the JPA javax.
The Dynamic, typesafe queries in JPA 2.0 article is a very good one on this topic, actually the best one I've found so far online, even better than the Chapter 23 Using the Criteria API to Create Queries from the Java EE 6 tutorials (that contains some mistakes).
148
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
