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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> -----------------------------------------------------
