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POMarshalling List<T> with Jersey and JAXB
 

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    <p>I try to output some list of documemts from a resource:</p> <pre><code>@GET @Produces({MediaType.APPLICATION_XML}) public Response getDocuments(@QueryParam("provider") String provider) { List&lt;Document&gt; documents = service.getDocuments(provider); return Response.ok( new GenericEntity&lt;List&lt;Document&gt;&gt;( new ArrayList&lt;Document&gt;(documents)) {}) .build(); } </code></pre> <p>The Document class is not annotated with @XmlElement (I really dislike annotating my nice objects with such low-level stuff...) but I have a registered provider for it:</p> <pre><code>@Service @Provider @Produces({MediaType.APPLICATION_XML, MediaType.TEXT_XML, MediaType.WILDCARD}) @Consumes({MediaType.APPLICATION_XML, MediaType.TEXT_XML, MediaType.WILDCARD}) public class JaxRsDocumentSerializer extends AbstractMessageReaderWriterProvider&lt;Document&gt; { </code></pre> <p>When I call this resource using a client with following code:</p> <pre><code>return getResource().path("/documents") .queryParam("provider", provider) .accept(MediaType.APPLICATION_XML).get(new GenericType&lt;List&lt;Document&gt;&gt;() {}); </code></pre> <p>I get the dreaded exception:</p> <pre><code> javax.ws.rs.WebApplicationException: com.sun.jersey.api.MessageException: A message body writer for Java class java.util.ArrayList, and Java type java.util.List&lt;com.polyspot.model.core.Document&gt;, and MIME media type application/xml was not found </code></pre> <p>I do not understand what's wrong here as I followed code I found elsewhere, including in SO.</p> <p>Help greatly appreciated.</p>
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    1. COCould you provide any information for class Document? Is in properly annotated?
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    2. COSorry. Yes it is. We have been marshalling/unmarshalling Document instances for "ages" with Jersey.
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    3. COOups. above comment was incorrect, we do not annotate objects but use a custom provider. I updated the question to reflect this.
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