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PO@XmlElement(required=true) for @WebParam does not work
 

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    <p>I'm building web service using JAX-WS. I have a strange problem that the annotation <code>@XmlElement(required=true)</code> for <code>@WebParam</code> works in some <code>@WebService</code> class, but doesn't work in some others.</p> <p>I have very similar code in the two <code>@WebService</code> classes. What may cause this problem? Parameter type or the entity class?</p> <p><strong>Edit: Add sample code</strong></p> <p>I have two web services:</p> <pre><code>@WebService(name = "ClubMemberPortType", serviceName = "ClubMemberService", portName = "ClubMemberSoapPort", targetNamespace = "http://club.com/api/ws") public class ClubMemberWS { @WebMethod(operationName = "findClubMembersByClubId", action = "urn:findClubMembersByClubId") @WebResult(name = "club_membership") public List&lt;ClubMembership&gt; findClubMembershipsByClubId(@XmlElement(required=true) @WebParam(name = "club_id") String clubId, @WebParam(name = "status") StatusEnum status){ ... }} </code></pre> <p>and</p> <pre><code>@WebService(name = "ClubPortType", serviceName = "ClubService", portName = "ClubSoapPort", targetNamespace = "http://club.com/api/ws") public class ClubWS { @WebMethod(operationName = "findClubByClubId", action = "urn:findClubByClubId") @WebResult(name = "club") public Club findClubByClubId(@XmlElement(required=true) @WebParam(name = "club_id") String clubId) { ... }} </code></pre> <p>The generated schema for the first web method is:</p> <pre><code>&lt;soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ws="http://club.com/api/ws"&gt; &lt;soapenv:Header/&gt; &lt;soapenv:Body&gt; &lt;ws:findClubMembersByClubId&gt; &lt;club_id&gt;?&lt;/club_id&gt; &lt;!--Optional:--&gt; &lt;status&gt;?&lt;/status&gt; &lt;/ws:findClubMembersByClubId&gt; &lt;/soapenv:Body&gt; &lt;/soapenv:Envelope&gt; </code></pre> <p>The generated schema for the second web method is:</p> <pre><code>&lt;soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ws="http://club.com/api/ws"&gt; &lt;soapenv:Header/&gt; &lt;soapenv:Body&gt; &lt;ws:findClubByClubId&gt; &lt;!--Optional:--&gt; &lt;club_id&gt;?&lt;/club_id&gt; &lt;/ws:findClubByClubId&gt; &lt;/soapenv:Body&gt; &lt;/soapenv:Envelope&gt; </code></pre> <p>So the first one works fine, the second one does not work. How is it possible? :(</p>
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    1. COAny code samples for the two cases? Actual problem you are facing (e.g. exceptions, better description of the behavior, etc)?
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    2. COI have added the code.
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    3. COPlease add the stacktrace of the error
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