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POJersey serialize empty list and single element list as an array
 

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    <p>Since there is a probelm with serialization an emplty list and single element list in Jersey. I tried to fix it by adding JAXBContextResolver class. The goal is to return JSON object thant contains JSON array to my Android application in all cases (if it returns 0 element or 1 element or more than 1). But my JSON data don't look the same. And I get an error in my android application <code>Expected BEGIN_OBJECT but was BEGIN_ARRAY</code> I would greatly appreciate your help. Thanks in advance</p> <pre><code>@Provider public class JAXBContextResolver implements ContextResolver&lt;JAXBContext&gt; { private JAXBContext context; private final Set&lt;Class&gt; types; // pojo class private Class[] ctypes = { Workitem.class, Project.class, User.class }; public JAXBContextResolver() throws Exception { NaturalBuilder builder = JSONConfiguration.natural(); //assure the rootelement name appears in the json structure builder.rootUnwrapping(false); this.types = new HashSet(Arrays.asList(ctypes)); // json configuration this.context = new JSONJAXBContext(builder.build(), ctypes); } @Override public JAXBContext getContext(Class&lt;?&gt; objectType) { return (types.contains(objectType)) ? context : null; } } </code></pre> <p>My JSON data look like this when I set <code>builder.rootUnwrapping(true);</code> </p> <pre><code>[ { "assignedTo": "assignee1", "businessKey": "Key1", "createdBy": "createdBy1", "description": "description1" } ] </code></pre> <p>But I want it to be like this to solve my problem in Android side :</p> <pre><code>{ "project": [ { "assignedTo": "assignee1", "businessKey": "Key1", "createdBy": "createdBy1", "description": "description1" } ] } </code></pre> <p>I added <code>@JsonRootName(value = "project")</code> to my My Project class in order to fix my problem but I get this error but I don't khow how to solve it please I need help </p> <pre><code>Multiple markers at this line - JsonRootName cannot be resolved to a type - The attribute value is undefined for the annotation type JsonRootName </code></pre> <p>My Project class is like this :</p> <pre><code>@XmlRootElement @JsonRootName(value = "project") public class Project implements Serializable { private static final long serialVersionUID = 1L; private String description; private String businessKey; private String createdBy; private String assignedTo; public Project() { } // getter and setter method } </code></pre>
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