Re: [gt-user] Error in ObjectSerializer/AnyHelper or Documentation

Tue, 13 May 2008 10:35:23 -0700 

Hello,
I should have mentioned, that replacing these two lines (following the mentioned documentation) in my implementation: 

SOAPElement sUsersElement =
  ObjectSerializer.toSOAPElement( sUsers, AGConstants.AG_SERVICEUSERS );
AnyHelper.setAny(context, sUsersElement);

with these two lines:

Element e =
  ObjectSerializer.toElement(sUsers, AGConstants.AG_SERVICEUSERS);
context.set_any(new MessageElement[] { new MessageElement(e) });

seems to fix the problem.

Best regards,

Dominic

Dominic Battre wrote:

Hello,


I think I have found an error in either the ObjectSerializer/AnyHelper 
implementation or the way the documentation suggests to use them. I'd 
like to hear your opinion, whether this is my fault or whether I should 
file a bug report.


Problem description
===================


I need to serialize objects as AnyTypes and retrieve them later. This 
works for trivial types but not complex types.


Let's have a look the documentation that can be found here:


http://www.globus.org/toolkit/docs/development/4.1.1/common/javawscore/developer/index.html 




You can find this example source code (section 5.2.1.2. Working with 
AnyContentType content):


  // convert Java object into SOAPElement
  EndpointReferenceType object = ...;
  QName elementName = new QName("http://example.com";, "EPR");

  SOAPElement element = ObjectSerializer.toSOAPElement(object, 
elementName);


  // set the SOAPlement as Any content
  AnyContentType bean = ...;
  AnyHelper.setAny(bean, element);

To make it more concrete, I have filled the blanks:

  EndpointReferenceType object = new EndpointReferenceType();


// the following line is new       
  object.setAddress(new AttributedURI("https://foo.bar.com/service";));


  QName elementName = new QName("http://example.com";, "EPR");

  SOAPElement element = ObjectSerializer.toSOAPElement(object, 
elementName);


  System.out.println(element);


Note that I specify an Address in the EPR (contrary to the example 
code). This is the output of the println statement:


(formating done by myself)
<ns1:EPR xsi:type="ns2:EndpointReferenceType"
   xmlns:ns1="http://example.com";
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
   xmlns:ns2="http://schemas.xmlsoap.org/ws/2004/03/addressing";>
 <Address xsi:type="xsd:anyURI"
     xmlns:xsd="http://www.w3.org/2001/XMLSchema";>
   https://foo.bar.com/service
 </Address>
 <ReferenceProperties xsi:type="ns2:ReferencePropertiesType"/>
 <ReferenceParameters xsi:type="ns2:ReferenceParametersType"/>
 <PortType xsi:type="ns2:AttributedQName" xsi:nil="true"/>
 <ServiceName xsi:type="ns2:ServiceNameType" xsi:nil="true"/>
</ns1:EPR>

Note that all elements beneath /ns1:EPR do not have namespaces.

If I deserialize this again:

String xml = element.toString();
EndpointReferenceType epr = (EndpointReferenceType)
   ObjectDeserializer.deserialize(
      new InputSource(new StringReader(xml) ),
   EndpointReferenceType.class);

       
System.out.println("Address = " + epr.getAddress());

System.out.println("Any = " + AnyHelper.toSingleString(epr.get_any()));

The address is empty and all attributes are stored in epr.get_any().

Address = null

Any = <Address xsi:type="xsd:anyURI" 
xmlns:xsd="http://www.w3.org/2001/XMLSchema"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>https://foo.bar.com/service</Address><ReferenceProperties 
xsi:type="ns2:ReferencePropertiesType" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
<ReferenceParameters xsi:type="ns2:ReferenceParametersType" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
<PortType xsi:type="ns2:AttributedQName" xsi:nil="true" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
<ServiceName xsi:type="ns2:ServiceNameType" xsi:nil="true" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>



The deserializer cannot parse the XML code correctly because the 
namespaces are missing. Note that the same problem occurs if I don't 
serialize with element.toString() but store the element as in the 
example: AnyHelper.setAny(bean, element);



If I used a different datatype than EndpointReferenceType without an 
<xs:any/>* I'd have received an exception.


Problem Analysis
================


The problem is the ObjectSerializer.toSOAPElement(object, elementName); 
call. During the serialization, Axis checks in BeanSerializer.java:147 
serialize(QName, Attributes, Object, SerializationContext), whether it 
serializes to a SOAP Context and drops the namespaces:


// If we're SOAP encoded, just use the local part,
// not the namespace.  Otherwise use the whole
// QName.
if (isEncoded) {
    qname = new QName(element.getXmlName().getLocalPart());
} else {
    qname = element.getXmlName();
}


This is the reason, why all nested objects are serialized without 
namespaces.



Question
========

My question is now:

Who is to blame?

1) Me
2) Axis
3) ObjectSerializer or AnyHelper
4) the Globus documentation

Should I file a bug? If yes, to which component.

Thanks for your help,

Dominic


























					Reply via email to