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POGWT: List of enums throws "could not deserialize response"
 

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    <p>I have a simple POJO which has some attributes, one of them being an enum. This worked fine but when I changed the enum attribute to a List of enums GWT gives me a serialization exception "could not deserialize the response". </p> <p>This works: </p> <pre><code>public class Report implements Serializable, Comparable&lt;Report&gt; { private static final long serialVersionUID = 1L; private long id; //some more attributes, all serialize fine private ReportCategory category; // the enumeration public ReportSVO(){ } //.. generated getters and setters } </code></pre> <p>When I changed the <code>private ReportCategory category;</code> to <code>private List&lt;ReportCategory&gt; categories;</code> I got the (de)serialization exception.</p> <p>Out of a hunch, I changed the enum to an inner class: (<code>public enum ReportCategory{...}</code> to <code>public class ReportCategory{ private Name categoryName; public enum Name{...}}</code>) and like magic, it works. This problem leads me to two questions:</p> <ol> <li>Is this a GWT bug? Or am I missing something?</li> <li>Is there a nicer way to solve this problem?</li> </ol> <p>The enum itself should not be a problem as it was working before (and enums are serializable by default). Also, when I forgot a no-args constructor on other GWT classes or had a non-serializable attribute the serialization exception message was like this: "com.google.gwt.user.client.rpc.SerializationException: Type '...' was not included in the set of types which can be serialized by this SerializationPolicy.."</p> <p>I am using GWT 2.4</p>
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