To further clarify: serialization code provided on the server side by Axis2, based on my POJO and its supporting parameter/return objects, serializes a polymorphic object subclass fields first, followed by superclass fields, when the subclass contains an array. The client code generated from the WSDL of this POJO based service (using wsdl2java-ADB), serializes the polymorphic object in the reverse order with superclass fields preceding subclass fields; and also expects that polymorphic objects received from the server follow this same order. Since the server serializes in the reverse order "unexpected subelement" errors occur.
I am going to assume that this is a bug since I don't see this behavior when the subclass does not contain an array. Dave Kraus ________________________________ From: Kraus, David Sent: Monday, July 28, 2008 5:49 PM To: [email protected] Subject: Inherited object serialized in reverse order by server, when subclass contains an array. I deployed a simple web service as a POJO to both axis2 1.2 and axis2 1.4. This service basically echoes back an object which demonstrates inheritance. In this example, MWSAttributeObjectInfo is a subclass of MWSObjectInfo. To create the client I used wsdl2java against the deployed service. When I invoked the echoAttrObjInfo method, which simply passes in MWSAttributeObjectInfo, and receives the same MWSAttributeObjectInfo back, I received an "Unexpected subelement arrayAttributeForms" in Axis2 1.2, and "Unexpected subelement objCreationTime" in Axis2 1.4. The client serialized the object to the server with MWSObjectInfo (superclass) fields first, followed by subclass fields (rest of MWSAttributeObjectInfo - the array). The server responded by passing back the object with the subclass fields first (the array), followed by superclass fields (MWSObjectInfo). This caused an exception in the client. Axis2 1.2 detected that the array shouldn't come first. Axis2 1.4 didn't see the error until after the array was processed, getting an exception on the first field after the array(objCreationTime). Is this a known bug? I tried a subclass with simple fields (no array), and no error was generated. Thanks, Dave >From the WSDL: <xs:element name="MWSObjectInfo" type="ax22:MWSObjectInfo" /> <xs:complexType name="MWSObjectInfo"> <xs:sequence> <xs:element name="objCreationTime" nillable="true" type="xs:string" /> <xs:element name="objDescription" nillable="true" type="xs:string" /> <xs:element name="objID" nillable="true" type="xs:string" /> <xs:element name="objIsHidden" type="xs:boolean" /> <xs:element name="objModificationTime" nillable="true" type="xs:string" /> <xs:element name="objName" nillable="true" type="xs:string" /> <xs:element name="objOwner" nillable="true" type="xs:string" /> <xs:element name="objParentFolderID" nillable="true" type="xs:string" /> <xs:element name="objPath" nillable="true" type="xs:string" /> <xs:element name="objState" type="xs:int" /> <xs:element name="objType" type="xs:int" /> <xs:element name="objVersion" type="xs:int" /> </xs:sequence> </xs:complexType> <xs:element name="MWSAttributeObjectInfo" type="ax22:MWSAttributeObjectInfo" /> <xs:complexType name="MWSAttributeObjectInfo"> <xs:complexContent> <xs:extension base="ax22:MWSObjectInfo"> <xs:sequence> <xs:element maxOccurs="unbounded" name="arrayAttributeForms" nillable="true" type="ax22:MWSHierarchyAttributeFormInfo" /> </xs:sequence> </xs:extension> </xs:complexContent> </xs:complexType> Soap Trace Client Request sends MWSAttributeObjectInfo.... <?xml version='1.0' encoding='UTF-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/";><soapenv:Body> <ns2:echoAttrObjInfo xmlns:ns2="http://microstrategy.com/webservices/";> <ns2:obj xmlns:s13="http://wsftest.com/xsd"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:type="s13:MWSAttributeObjectInfo"> <s13:objCreationTime>now</s13:objCreationTime> <s13:objDescription>generic test object</s13:objDescription> <s13:objID>DAVEKRAUS0002</s13:objID> <s13:objIsHidden>false</s13:objIsHidden> <s13:objModificationTime>later</s13:objModificationTime> <s13:objName>MWSAttributeObjectInfo</s13:objName> <s13:objOwner>Dave</s13:objOwner> <s13:objParentFolderID>FOLDERID</s13:objParentFolderID> <s13:objPath>objPath</s13:objPath> <s13:objState>1</s13:objState> <s13:objType>2</s13:objType> <s13:objVersion>1</s13:objVersion> <s13:arrayAttributeForms> <s13:attributeFormID>XXXXXXXXXX</s13:attributeFormID> <s13:attributeFormName>XXXXXXXXXX</s13:attributeFormName> <s13:dataType>100</s13:dataType> </s13:arrayAttributeForms> <s13:arrayAttributeForms> <s13:attributeFormID>YYYYYYYYYY</s13:attributeFormID> <s13:attributeFormName>YYYYYYYYYY</s13:attributeFormName> <s13:dataType>200</s13:dataType> </s13:arrayAttributeForms> </ns2:obj> </ns2:echoAttrObjInfo></soapenv:Body></soapenv:Envelope> Server Response echoes back same MWSAttributeObjectInfo object <?xml version='1.0' encoding='UTF-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/";><soapenv:Body> <ns:echoAttrObjInfoResponse xmlns:ns="http://microstrategy.com/webservices/";> <ns:return> <arrayAttributeForms xmlns="http://wsftest.com/xsd";> <attributeFormID>XXXXXXXXXX</attributeFormID> <attributeFormName>XXXXXXXXXX</attributeFormName> <dataType>100</dataType> </arrayAttributeForms> <arrayAttributeForms xmlns="http://wsftest.com/xsd";> <attributeFormID>YYYYYYYYYY</attributeFormID> <attributeFormName>YYYYYYYYYY</attributeFormName> <dataType>200</dataType> </arrayAttributeForms> <objCreationTime xmlns="http://wsftest.com/xsd";>now</objCreationTime> <objDescription xmlns="http://wsftest.com/xsd";>generic test object</objDescription> <objID xmlns="http://wsftest.com/xsd";>DAVEKRAUS0002</objID> <objIsHidden xmlns="http://wsftest.com/xsd";>false</objIsHidden> <objModificationTime xmlns="http://wsftest.com/xsd";>later</objModificationTime> <objName xmlns="http://wsftest.com/xsd";>MWSAttributeObjectInfo</objName> <objOwner xmlns="http://wsftest.com/xsd";>Dave</objOwner> <objParentFolderID xmlns="http://wsftest.com/xsd";>FOLDERID</objParentFolderID> <objPath xmlns="http://wsftest.com/xsd";>objPath</objPath> <objState xmlns="http://wsftest.com/xsd";>1</objState> <objType xmlns="http://wsftest.com/xsd";>2</objType> <objVersion xmlns="http://wsftest.com/xsd";>1</objVersion> </ns:return> </ns:echoAttrObjInfoResponse> </soapenv:Body></soapenv:Envelope>
