title: Why are Maps returned by a JAX-WS call always empty?
body: <p>My web service method returns a <code>Page</code> object which includes the following methods:</p>
  
  <pre><code>public Map&lt;String,String[]&gt; getParameters() { ... }
  public setParameters(Map&lt;String,String[]&gt; parameters) { ... }
  </code></pre>
  
  <p>On the client side, the JAX-WS generated <code>getParameters()</code> method returns a <code>Parameters</code> object which provides a <code>getEntry()</code> method that returns a <code>List&lt;Entry&gt;</code>. However, this list is always empty. What is the cause?</p>