Hibernate can do anything you want: You can use it to tie in to existing database schema you can use it to run plain SQL queries or stored procedures, but you need to make sure that you have a solid understanding of the configuration. I have, however, come to the point where I see so much benefit, that I feel it was completely worth my time to learn.Ĭonfiguration is everything. The learning curve is not small, and you will probably be frustrated for a while. It took me a long time to get even a simple object relationship working the way I wanted to. ![]() They are very powerful, very complex tools. Generated Version is: 0 A few more things to remember Your output should look something like this: Object 0 I think you will quickly see how things work. The application will then print out our results – play around with adding new fields to your object, take a look at the console output. You should see Hibernate create the table, then execute our queries. When you run HibernateDemoTest, you should have a fully functional Hibernate enabled HSQL database with one table. ("Generated Version is: " + object1.getVersion()) Īssert.assertEquals((Long) 1l, object0.getId()) Īssert.assertEquals((Long) 2l, object1.getId()) Īnd here we are. ("Generated Version is: " + object0.getVersion()) SimpleObject object1 = new SimpleObject() Īssert.assertEquals((Long) null, object0.getId()) Īssert.assertEquals((Long) null, object1.getId()) SimpleObject object0 = new SimpleObject() Import .util.EntityManagerUtil ĮntityTransaction transaction = em.getTransaction() Without a proper implementation of these two methods, bad things can happen like duplicate rows being added, strange or missing data from result sets. hashCode() methods these methods will need to be implemented in order to ensure proper object equality and consistency between the Hibernate/JPA and our application.
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