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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=9818 Can not return polymorphic object relations Summary: Can not return polymorphic object relations Product: Axis Version: current (nightly) Platform: PC OS/Version: Windows NT/2K Status: NEW Severity: Critical Priority: Other Component: Serialization/Deserialization AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] My WebService is written in C# (.NET) and hosted by MS-IIS. I am using Axis for generating the client proxy. For illustrating this problem, I have created the following scenario: - The WebService defines two objects, A (ancestor) & B (descendant) - The WebService defines one method, public A GetB(), but the implementation returns an instance of B When running the Client I get an SAX Exception telling me that there is no element named �b� in object A! It does not seem like Axis is using the actual type returned from the WebService call? (<GetBResult xsi:type="B">) For reference I have added: 1) The WebService (C#) 2) The wsdl file 3) The Client (Java) 4) The exception that occurs when running the Client 5) TCPMonitor - request 6) TCPMonitor - response 1) The WebService (C#): ----------------------------------------------------- using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Diagnostics; using System.Web; using System.Web.Services; using System.Xml.Serialization; namespace WebService2 { [WebService(Namespace="http://nib.dk/WS123/";)] public class Service1 : System.Web.Services.WebService { [WebMethod] [XmlInclude(typeof(B))] public A GetB() { B b = new B(); b.a = "GetB; name of A"; b.b = "GetB; name of B"; return b; } } public class A { public string a; } [XmlInclude(typeof(B))] public class B : A { public string b; } } ----------------------------------------------------- 2) The wsdl file: ----------------------------------------------------- <?xml version="1.0" encoding="utf-8"?> <definitions xmlns:http="http://schemas.xmlsoap.org/wsdl/http/"; xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"; xmlns:s="http://www.w3.org/2001/XMLSchema"; xmlns:s0="http://nib.dk/WS123/"; xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"; xmlns:tm="http://microsoft.com/wsdl/mime/textMatching/"; xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/"; targetNamespace="http://nib.dk/WS123/"; xmlns="http://schemas.xmlsoap.org/wsdl/";> <types> <s:schema elementFormDefault="qualified" targetNamespace="http://nib.dk/WS123/";> <s:element name="GetB"> <s:complexType /> </s:element> <s:element name="GetBResponse"> <s:complexType> <s:sequence> <s:element minOccurs="0" maxOccurs="1" name="GetBResult" type="s0:A" /> </s:sequence> </s:complexType> </s:element> <s:complexType name="A"> <s:sequence> <s:element minOccurs="0" maxOccurs="1" name="a" type="s:string" /> </s:sequence> </s:complexType> <s:complexType name="B"> <s:complexContent mixed="false"> <s:extension base="s0:A"> <s:sequence> <s:element minOccurs="0" maxOccurs="1" name="b" type="s:string" /> </s:sequence> </s:extension> </s:complexContent> </s:complexType> <s:element name="A" nillable="true" type="s0:A" /> </s:schema> </types> <message name="GetBSoapIn"> <part name="parameters" element="s0:GetB" /> </message> <message name="GetBSoapOut"> <part name="parameters" element="s0:GetBResponse" /> </message> <message name="GetBHttpGetIn" /> <message name="GetBHttpGetOut"> <part name="Body" element="s0:A" /> </message> <message name="GetBHttpPostIn" /> <message name="GetBHttpPostOut"> <part name="Body" element="s0:A" /> </message> <portType name="Service1Soap"> <operation name="GetB"> <input message="s0:GetBSoapIn" /> <output message="s0:GetBSoapOut" /> </operation> </portType> <portType name="Service1HttpGet"> <operation name="GetB"> <input message="s0:GetBHttpGetIn" /> <output message="s0:GetBHttpGetOut" /> </operation> </portType> <portType name="Service1HttpPost"> <operation name="GetB"> <input message="s0:GetBHttpPostIn" /> <output message="s0:GetBHttpPostOut" /> </operation> </portType> <binding name="Service1Soap" type="s0:Service1Soap"> <soap:binding transport="http://schemas.xmlsoap.org/soap/http"; style="document" /> <operation name="GetB"> <soap:operation soapAction="http://nib.dk/WS123/GetB"; style="document" /> <input> <soap:body use="literal" /> </input> <output> <soap:body use="literal" /> </output> </operation> </binding> <binding name="Service1HttpGet" type="s0:Service1HttpGet"> <http:binding verb="GET" /> <operation name="GetB"> <http:operation location="/GetB" /> <input> <http:urlEncoded /> </input> <output> <mime:mimeXml part="Body" /> </output> </operation> </binding> <binding name="Service1HttpPost" type="s0:Service1HttpPost"> <http:binding verb="POST" /> <operation name="GetB"> <http:operation location="/GetB" /> <input> <mime:content type="application/x-www-form-urlencoded" /> </input> <output> <mime:mimeXml part="Body" /> </output> </operation> </binding> <service name="Service1"> <port name="Service1Soap" binding="s0:Service1Soap"> <soap:address location="http://localhost/WebService2/Service1.asmx"; /> </port> <port name="Service1HttpGet" binding="s0:Service1HttpGet"> <http:address location="http://localhost/WebService2/Service1.asmx"; /> </port> <port name="Service1HttpPost" binding="s0:Service1HttpPost"> <http:address location="http://localhost/WebService2/Service1.asmx"; /> </port> </service> </definitions> ----------------------------------------------------- 3) The Client (Java): ----------------------------------------------------- import dk.nib.*; public class Client { public static void main(String[] args) { Service1 sl = new Service1Locator(); Service1Soap ss = null; try { ss = sl.getService1Soap(); } catch (javax.xml.rpc.ServiceException e) { System.out.println("Error getting Service1Soap.; "+e); return; } try { A a = ss.getB(); if (a instanceof B) { B b = (B)a; System.out.println("getB(); a="+b.getA()+", b="+b.getB()); } else throw new Exception("Unexpected return type!"); } catch (Exception e) { System.out.println("Error during call to getB().; "+e); } } } ----------------------------------------------------- 4) The exception that occurs when running the Client: ----------------------------------------------------- org.xml.sax.SAXException: Invalid element in dk.nib.A - b at org.apache.axis.encoding.ser.BeanDeserializer.onStartChild (BeanDeserializer.java:270) at org.apache.axis.encoding.DeserializationContextImpl.startElement (DeserializationContextImpl.java:862) at org.apache.axis.message.SAX2EventRecorder.replay (SAX2EventRecorder.java:199) at org.apache.axis.message.MessageElement.publishToHandler (MessageElement.java:636) at org.apache.axis.message.RPCElement.deserialize(RPCElement.java:232) at org.apache.axis.message.RPCElement.getParams(RPCElement.java:256) at org.apache.axis.client.Call.invoke(Call.java:1727) at org.apache.axis.client.Call.invoke(Call.java:1635) at org.apache.axis.client.Call.invoke(Call.java:1184) at dk.nib.Service1SoapStub.getB(Service1SoapStub.java:128) at dk.es.KMSWSClient.Client3.main(Client3.java:34) Error during call to getB().; org.xml.sax.SAXException: Invalid element in dk.nib.A - b ----------------------------------------------------- 5) TCPMonitor - request: ----------------------------------------------------- POST /WebService2/Service1.asmx HTTP/1.0 Content-Length: 311 Host: localhost Content-Type: text/xml; charset=utf-8 SOAPAction: "http://nib.dk/WS123/GetB"; <?xml version="1.0" encoding="UTF-8"?> <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"; xmlns:xsd="http://www.w3.org/2001/XMLSchema"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";> <SOAP-ENV:Body> <GetB xmlns="http://nib.dk/WS123/"/> </SOAP-ENV:Body> </SOAP-ENV:Envelope> ----------------------------------------------------- 6) TCPMonitor - response: ----------------------------------------------------- HTTP/1.1 200 OK Server: Microsoft-IIS/5.0 Date: Wed, 12 Jun 2002 20:23:06 GMT Cache-Control: private, max-age=0 Content-Type: text/xml; charset=utf-8 Content-Length: 386 <?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xmlns:xsd="http://www.w3.org/2001/XMLSchema";> <soap:Body> <GetBResponse xmlns="http://nib.dk/WS123/";> <GetBResult xsi:type="B"> <a>GetB; name of A</a> <b>GetB; name of B</b> </GetBResult> </GetBResponse> </soap:Body> </soap:Envelope> -----------------------------------------------------
