Hi,
We are using JBoss 4.0.3 for our webservice implementation.
We want to expose a generic interface which can take a valuetype or any of its
subtypes as parameters.
My Service Interface looks like this
public interface PolicyWS extends java.rmi.Remote {
| public Policy createPolicy(Policy policy) throws
| java.rmi.RemoteException;
| }
Here the createPolicy method can take any valuetype of type Policy as its
parameter
Policy and its subclasses looks like this:
public abstract class Policy
| {
| private String policytype;
| private String name;
| .......getters and setters
| }
|
| public class AVPolicy extends Policy implements Serializable
| {
| private Integer avpolicyid;
| .......getters and setters
|
| }
|
|
| public class BackupPolicy extends Policy implements Serializable
| {
| private Integer backuppolicyid;
| .......getters and setters
|
| }
We use extension mechanism in our wsdl to expose this interface
WSDL looks like:
<?xml version="1.0" encoding="UTF-8"?>
|
| <definitions name="PolicyWebservice" targetNamespace="http://sample/prd/r1";
xmlns:tns="http://sample/prd/r1"; xmlns="http://schemas.xmlsoap.org/wsdl/";
xmlns:ns2="http://sample/prd/r1/types";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";
xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/";>
| <types>
| <schema targetNamespace="http://sample/prd/r1/types";
xmlns:tns="http://sample/prd/r1/types";
xmlns:soap11-enc="http://schemas.xmlsoap.org/soap/encoding/";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/";
xmlns="http://www.w3.org/2001/XMLSchema";>
|
| <complexType name="createPolicy">
| <sequence>
| <element name="Policy_1" type="tns:Policy"
nillable="true"/></sequence></complexType>
|
| <complexType name="BackupPolicy">
| <complexContent>
| <extension base="tns:Policy">
| <sequence>
| <element name="backuppolicyid" type="int" nillable="true"/>
| </sequence></extension></complexContent></complexType>
| <complexType name="AVPolicy">
| <complexContent>
| <extension base="tns:Policy">
| <sequence>
| <element name="avpolicyid" type="int" nillable="true"/>
| </sequence></extension></complexContent></complexType>
|
| <complexType name="Policy">
| <sequence>
| <element name="name" type="string" nillable="true"/>
| <element name="policytype" type="string"
nillable="true"/></sequence></complexType>
| <complexType name="createPolicyResponse">
| <sequence>
| <element name="result" type="tns:Policy"
nillable="true"/></sequence></complexType>
| <element name="createPolicy" type="tns:createPolicy"/>
| <element name="createPolicyResponse"
type="tns:createPolicyResponse"/></schema></types>
| <message name="PolicyWS_createPolicy">
| <part name="parameters" element="ns2:createPolicy"/></message>
| <message name="PolicyWS_createPolicyResponse">
| <part name="result" element="ns2:createPolicyResponse"/></message>
| <portType name="PolicyWS">
| <operation name="createPolicy">
| <input message="tns:PolicyWS_createPolicy"/>
| <output
message="tns:PolicyWS_createPolicyResponse"/></operation></portType>
| <binding name="PolicyWSBinding" type="tns:PolicyWS">
| <soap:binding transport="http://schemas.xmlsoap.org/soap/http";
style="document"/>
| <operation name="createPolicy">
| <soap:operation soapAction=""/>
| <input>
| <soap:body use="literal"/></input>
| <output>
| <soap:body use="literal"/></output></operation></binding>
| <service name="PolicyWebservice">
| <port name="PolicyWSPort" binding="tns:PolicyWSBinding">
| <soap:address
location="REPLACE_WITH_ACTUAL_URL"/></port></service></definitions>
When we try to invoke this service passing a parameter of type BackupPolicy the
request works fine( i.e it converts to the proper subtype on the server side).
But when i return the BackupPolicy instance , I get a ClassCastException.
When i had a look at the SOAP request and response, I found that the request is
encoded with the value type whereas the response is not.That is why the client
is unable to instantiate the proper value type.
SOAP Request XML
<?xml version="1.0" encoding="UTF-8"?>
| <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
| <soapenv:Body>
| <createPolicy xmlns="http://sample/prd/r1/types";>
| <Policy_1 xsi:type="ns1:BackupPolicy"
xmlns:ns1="http://sample/prd/r1/types"; xmlns="">
| <name xsi:nil="true"/>
| <policytype>backup</policytype>
| <backuppolicyid>1</backuppolicyid>
| </Policy_1>
| </createPolicy>
| </soapenv:Body>
| </soapenv:Envelope>
SOAP Response XML
<?xml version="1.0" encoding="UTF-8"?>
| <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
| <soapenv:Body>
| <ns1:createPolicyResponse xmlns:ns1="http://sample/prd/r1/types";>
| <result>
| <name>backup</name>
| <policytype xsi:nil="1"/>
| <backuppolicyid xsi:nil="1"/>
| </result>
| </ns1:createPolicyResponse>
| </soapenv:Body>
| </soapenv:Envelope>
My client snippet
PolicyWebserviceLocator loc = new PolicyWebserviceLocator();
| PolicyWS policyws = loc.getPolicyWSPort();
| BackupPolicy policy = new BackupPolicy();
| policy.setBackuppolicyid(1);
| policy.setPolicytype("backup");
| BackupPolicy bp =
(BackupPolicy)policyws.createPolicy(policy); //ClassCastException
bp.getBackuppolicyid();
Is this an issue with JBoss ? Please provide me any pointers on this.
Thanks in advance
-Ram
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