XMLBeans deserialisation classpath issues with inherited types

[Martin Scholl <ma...@enviromatics.net>]

Hi,

currently I am confronted with some wired XMLBeans classpath issue  
during deserialisation of inherited types.

First of all the setup:

- Axis2-141, Tomcat 6, XMLBeans 2.3.0
- the web service is deployed as an aar containing a lib folder where  
all service related libraries are situated (especially the generated  
xbeans)
- the axis2/WEB-INF/lib folder contains just the default jars
- all the xbeans were generated separately by scomp and are located in  
a single jar
- the service was generated using the "-Ewdc" switch and the dummy  
schemas are not included in the generated service jar (the jar  
actually only contains the Stub, the MessageReceivers, the Skeleton  
and several Faults (declared in the WSDL file))

So far so good. No problem at all, everything runs fine, except:

In our type xsds we have some inheritance (snippet):

[...]
     <element name="UsernameIdentity"  
type="ia_types:UsernameIdentityType"  
substitutionGroup="ia_types:AttributedIdentity"/>
     <complexType name="UsernameIdentityType">
         <complexContent>
             <extension base="ia_types:AttributedIdentityType">
                 <sequence>
                     <element name="username" type="string"/>
                 </sequence>
             </extension>
         </complexContent>
     </complexType>
     <complexType name="UsernameIdentityPropertyType">
         <sequence minOccurs="0">
             <element ref="ia_types:UsernameIdentity"/>
         </sequence>
     </complexType>

     <element name="GroupIdentity" type="ia_types:GroupIdentityType"  
substitutionGroup="ia_types:AttributedIdentity"/>
     <complexType name="GroupIdentityType">
         <complexContent>
             <extension base="ia_types:AttributedIdentityType">
                 <sequence>
                     <element name="groupname" type="string"/>
                 </sequence>
             </extension>
         </complexContent>
     </complexType>
     <complexType name="GroupIdentityPropertyType">
         <sequence minOccurs="0">
             <element ref="ia_types:GroupIdentity"/>
         </sequence>
     </complexType>

     <element name="AttributedIdentity"  
type="ia_types:AttributedIdentityType"  
substitutionGroup="ia_types:Identity"/>
     <complexType name="AttributedIdentityType">
         <complexContent>
             <extension base="ia_types:IdentityType">
                 <sequence>
                     <element name="attributes"  
type="ia_types:IdentityAttributesType"/>
                     <element name="identities">
                         <complexType>
                             <sequence>
                                 <element  
ref="ia_types:AttributedIdentity" minOccurs="0" maxOccurs="unbounded"/>
                             </sequence>
                         </complexType>
                     </element>
                 </sequence>
             </extension>
         </complexContent>
     </complexType>

     <element name="Identity" type="ia_types:IdentityType"/>
     <complexType name="IdentityType">
         <sequence>
             <element name="id" type="integer"/>
             <element name="origin" type="string"/>
             <element name="refProfile"  
type="pms_types:ProfilePropertyType" minOccurs="0"/>
             <element name="active" type="boolean"/>
         </sequence>
     </complexType>
     <complexType name="IdentityPropertyType">
         <sequence minOccurs="0">
             <element ref="ia_types:Identity"/>
         </sequence>
     </complexType>
[...]

Now the service offers a request to create a new identity:

     <element name="createIdentityRequest"  
type="ia_requests:createIdentityRequest"/>
     <complexType name="createIdentityRequest">
         <sequence>
             <element name="identity" type="ia_types:IdentityType"/>
         </sequence>
     </complexType>

If I send the following request:

<ns:createIdentityRequest xmlns:ns="http://www.enviromatics.net/WS/IdentityManagementAndAuthenticationService/requests/2.0 
"
						  xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
   <ns1:identity xmlns:ns1="http://www.enviromatics.net/WS/IdentityManagementAndAuthenticationService/requests/2.0 
"
   				xmlns:ns="http://www.enviromatics.net/WS/IdentityManagementAndAuthenticationService/types/2.0 
"
   				xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   				xmlns="http://www.enviromatics.net/WS/IdentityManagementAndAuthenticationService/requests/2.0 
"
   				xsi:type="ns:GroupIdentityType">
     <ns:id xsi:nil="true"/>
     <ns:origin>http://127.0.0.1:8091/axis214/services/IdentityManagementAndAuthenticationService 
</ns:origin>
     <ns:refProfile/>
     <ns:active>false</ns:active>
     <ns:attributes xsi:type="ns:KeyVectorIdentityAttributesType"/>
     <ns:identities/>
     <ns:groupname>testGroup</ns:groupname>
   </ns1:identity>
</ns:createIdentityRequest>

which actually represents an instance of GroupIdentityType (see  
xsi:type="ns:GroupIdentityType") but XMLBeans parameter does not  
create an instance of GroupIdentityType(Impl) but of  
IdentityType(Impl) which cannot be cast (obviously). The funny thing  
about this is that if I place the xbeans jar in the axis2/WEB-INF/lib  
folder instead of the lib folder in the service aar XMLBeans parses an  
instance of GroupIdentityType(Impl) as it should.

Why does XMLBeans create only the basetype of an inheritance structure  
if the xbeans are located within the service aar and does work as  
expected if the xbeans are placed in axis2/WEB-INF/lib? I do not want  
any jar to be in the global axis2 classpath except the default ones so  
any help ist highly appreciated.

Thanks in advance.

Martin