title: How to map an immutable collection with JPA and Hibernate
body: <p>I am using JPA 2.1 and Hibernate as a JPA implementation, and I want to load a relationship as an immutable collection.</p>
  <p>Let's take an example of an <code>Employer</code> parent entity that has an <code>employees</code> child collection.</p>
  <p>What can be done to instruct JPA to load an immutable <code>employees</code> collection?</p>