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JPA 2 Tutorials

JPA Annotations – @Temporal

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@Temporal annotation in JPA implementation can only be used with the fields and property get methods. Also, this annotation can be specified for the persistent fields or properties java.util.Data or java.util.Calendar. This annotation is available since the release of JPA 1.0. @Temporal solves the one of the major issue of converting the date and time …

JPA Vs Hibernate

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I have come across this question from many of our readers and who ever working on the hibernate framework : What is the difference between Java Persistence API (JPA) and Hibernate ORM Framework. This post simply answer to those who are confusing with JPA and Hibernate difference. JPA and Hibernate Difference JPA is a specification for …

JPA 2 Tutorials

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Java Persistance API (JPA) is the object relational mapping (ORM) specification for Java EE applications. JPA 2 is the second major release for the JPA framework with lot of interesting features. Many of the features introduced with this release are already supported by the many of the framework vendors like Hibernate, EclipseLink, etc. This JPA 2 …

TypedQuery in JPA 2

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One of the new feature introduced in JPA 2.0 is using the TypedQuery interface for building the query. This can be used with the CriteriaBuilder in JPA 2. As the name itself specifies, the main purpose of using the TypedQuery would be to narrow the result type and eliminate the need for type casting after …

How To Create EntityManagerFactory in JPA

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This tutorial explains how to create EntityManagerFactory in your JPA application when you are writing your first JPA programming. It is the standard way of creating the factory if you use the JPA specification. Normally there are two ways to create the factory, one is through the configuration file persistence.xml and another one is through the …

JPA EntityManagerFactory Vs Hibernate’s SessionFactory

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If you are using the JPA’s standard specification implementation (Read : Introduction to JPA), then you would use EntityManagerFactory for opening the session. But, if you are using the hibernate implementation, you have hibernate specific SessionFactory for managing the sessions. Here there is lot of confusion between developers like which one is the best approach. …