What customization to apply for JAX-WS to unwrap return objects to lists?

Question

I am trying to find if there is a way to customize e.g. CSID2ExtRefs operation for ChemSpider WebService that is passed a list of strings as one of the arguments and returns the list of objects:

<!-- Request element: -->
<s:element name="CSID2ExtRefs">
  <s:complexType>
    <s:sequence>
      <s:element minOccurs="1" maxOccurs="1" name="CSID" type="s:int"/>
      <s:element minOccurs="0" maxOccurs="1" name="datasources" type="tns:ArrayOfString"/>
      <s:element minOccurs="0" maxOccurs="1" name="token" type="s:string"/>
    </s:sequence>
  </s:complexType>
</s:element>
<!-- Response element: -->
<s:element name="CSID2ExtRefsResponse">
  <s:complexType>
    <s:sequence>
      <s:element minOccurs="0" maxOccurs="1" name="CSID2ExtRefsResult" type="tns:ArrayOfExtRef"/>
    </s:sequence>
  </s:complexType>
</s:element>
<s:complexType name="ArrayOfExtRef">
  <s:sequence>
    <s:element minOccurs="0" maxOccurs="unbounded" name="ExtRef" type="tns:ExtRef"/>
  </s:sequence>
</s:complexType>
<s:complexType name="ArrayOfString">
  <s:sequence>
    <s:element minOccurs="0" maxOccurs="unbounded" name="string" nillable="true" type="s:string"/>
  </s:sequence>
</s:complexType>

The generated by wsimport interface method is (with jaxws:enableWrapperStyle = true):

@WebMethod(operationName = "CSID2ExtRefs", action = "http://www.chemspider.com/CSID2ExtRefs")
@WebResult(name = "CSID2ExtRefsResult", targetNamespace = "http://www.chemspider.com/")
@RequestWrapper(localName = "CSID2ExtRefs", targetNamespace = "http://www.chemspider.com/", className = "chemspider.core.CSID2ExtRefsRequest")
@ResponseWrapper(localName = "CSID2ExtRefsResponse", targetNamespace = "http://www.chemspider.com/", className = "chemspider.core.CSID2ExtRefsResponse")
public ArrayOfExtRef csid2ExtRefs(
    @WebParam(name = "CSID", targetNamespace = "http://www.chemspider.com/")
    int csid,
    @WebParam(name = "datasources", targetNamespace = "http://www.chemspider.com/")
    ArrayOfString datasources,
    @WebParam(name = "token", targetNamespace = "http://www.chemspider.com/")
    String token);

but I would like to have ArrayOfExtRef and ArrayOfString unwrapped and turned to lists e.g. get the following:

public List<ExtRef> csid2ExtRefs(
    @WebParam(...)
    int csid,
    @WebParam(...)
    List<String> datasources,
    @WebParam(...)
    String token);

If I make this change manually, JAX-WS works fine. I wonder, if there any way to write an appropriate customization for that?

Answer 1

First off all web service std are not 100% portable yet. Replace

<s:element minOccurs="0" maxOccurs="1" name="datasources" type="tns:ArrayOfString"/>

with

<s:element name="datasources" type="xs:string" form="qualified" minOccurs="0" maxOccurs="unbounded" />

also replace

<s:element minOccurs="0" maxOccurs="1" name="CSID2ExtRefsResult" type="tns:ArrayOfExtRef"/>

with

<s:element minOccurs="0" maxOccurs="unbounded" name="CSID2ExtRefsResult" type="tns:ExtRef"/>

Also you may remove complexType such as "ArrayOfString",ArrayOfExtRef.