title: Enrich values of object
body: <p>Let's say I have a Person-Object a with firstname = Ronald and name = null.</p>
  
  <pre><code>public class Person {
      private String firstName;
      private String name;
  }
  </code></pre>
  
  <p>And I need to enrich the empty values with values of another object..
  Person b with firstname = "Matt" and Lastname = "Kingley"</p>
  
  <p>So the result should be a Person with firstname : Ronald but lastname "Kingley"</p>
  
  <p>What is the best way to do this?
  Are there any good framewroks for this?</p>
  
  <p>Thanks in advance</p>