List is a collection in which the indexes of the elements are maintained. Hibernate maintains the same by adding an index column to the collection table. Let’s see how it’s done using the XML mapping. First we need to add the Persistent class. We’ll...

Bag is an unordered collection that permits duplicate elements. Let’s edit the Student class from our previous post in which a Set property was configured. We’ll use the same class but we’ll replace the set with Bag. Java doesn’t have the...

It’s a common requirement to configure value-type collections in the entity. In this post I’ll walk you through the steps for configuring the Set of value-type collection. We know Set doesn’t allow duplicate entries so it will be interesting to see...

In persistent units we often face a scenario where we think of grouping few similar properties and creating separate persistent entity for them would be expensive. For such situation creating embedded components for grouping such properties makes more sense. The life...