Marshalling 'autotype' generated objects back to XML

Question

I have a document-literal webservice implementation that uses
WebLogic request/response binding classes generated by
'autotype'. My trouble is that there does not seem to be any way to programmatically
transform these Java objects back into XML form. I'm fairly new to web services
development with webLogic, so I may be missing something, and my hope is that
there is a straight-forward solution for this.
I have tried to use the serialize method from the Codec class, but something in
the underlying implementation throws a NullPointerException in reference to the
SerializationContext object. And I can't seem to find any documentation on this
object, or anything explicitly pertaining to marshalling back to XML. So at this
point, my less than desirable approach is to create a set of parallel classes
using JAXB, so that I can have access to the JAXBContext marshaller.
Here is the underlying method for our web service operation (which unsuccessfully
calls the serialize method on the codec class):
public com.hp.bea.OutValidateConfig validate_v1_2(com.hp.bea.InValidateConfig
validateRequest)
InValidateConfigCodec vcrequestCodec = new InValidateConfigCodec();
weblogic.xml.stream.XMLName xmlType =
weblogic.xml.stream.ElementFactory.createXMLName( "http://production.psg.hp.com/types"
, "InValidateConfigType" );
try {
DocumentBuilder docBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document vcDoc = docBuilder.newDocument();
XMLOutputStream xmlOutputStream = XMLOutputStreamFactory.newInstance().newOutputStream(vcDoc);
SerializationContext ctx= SerializationContextFactory.newInstance().createSerializationContext();
// ctx.setNamespacePrefixMap();
if ( validateRequest == null )
System.out.println("ValidateRequest is null");
else
System.out.println("ValidateRequest is not null");
System.out.println(validateRequest);
try
vcrequestCodec.serialize(validateRequest, xmlType, xmlOutputStream, ctx);
catch (Exception excp)
excp.printStackTrace();
// TODO - call service handler
Document vcResp = docBuilder.newDocument();
OutValidateConfigCodec vcResponseCodec = new OutValidateConfigCodec();
XMLInputStream xmlInputStream = XMLInputStreamFactory.newInstance().newInputStream(vcResp);
DeserializationContext dCtx= DeserializationContextFactory.newInstance().createDeserializationContext();
vcResponseCodec.deserialize(xmlType, xmlInputStream, dCtx);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
There must be something I'm missing, because I'm sure there is a simple way to
Marshall my object back to XML. Am I using the wrong API? Can someone please
shed some light on this? Any insight or suggestions are much appreciated.
Thank you,
Matt

Answer 1

Hi Matthew,
Try this example from Manoj [1] and see it fits your use case.
Hope this helps,
Bruce
[1]
http://www.manojc.com/?sample43
Matthew Cohen wrote:
>
I have a document-literal webservice implementation that uses
WebLogic request/response binding classes generated by
'autotype'. My trouble is that there does not seem to be any way to programmatically
transform these Java objects back into XML form. I'm fairly new to web services
development with webLogic, so I may be missing something, and my hope is that
there is a straight-forward solution for this.
I have tried to use the serialize method from the Codec class, but something in
the underlying implementation throws a NullPointerException in reference to the
SerializationContext object. And I can't seem to find any documentation on this
object, or anything explicitly pertaining to marshalling back to XML. So at this
point, my less than desirable approach is to create a set of parallel classes
using JAXB, so that I can have access to the JAXBContext marshaller.
Here is the underlying method for our web service operation (which unsuccessfully
calls the serialize method on the codec class):
public com.hp.bea.OutValidateConfig validate_v1_2(com.hp.bea.InValidateConfig
validateRequest)
InValidateConfigCodec vcrequestCodec = new InValidateConfigCodec();
weblogic.xml.stream.XMLName xmlType =
weblogic.xml.stream.ElementFactory.createXMLName( "http://production.psg.hp.com/types"
, "InValidateConfigType" );
try {
DocumentBuilder docBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document vcDoc = docBuilder.newDocument();
XMLOutputStream xmlOutputStream = XMLOutputStreamFactory.newInstance().newOutputStream(vcDoc);
SerializationContext ctx= SerializationContextFactory.newInstance().createSerializationContext();
// ctx.setNamespacePrefixMap();
if ( validateRequest == null )
System.out.println("ValidateRequest is null");
else
System.out.println("ValidateRequest is not null");
System.out.println(validateRequest);
try
vcrequestCodec.serialize(validateRequest, xmlType, xmlOutputStream, ctx);
catch (Exception excp)
excp.printStackTrace();
// TODO - call service handler
Document vcResp = docBuilder.newDocument();
OutValidateConfigCodec vcResponseCodec = new OutValidateConfigCodec();
XMLInputStream xmlInputStream = XMLInputStreamFactory.newInstance().newInputStream(vcResp);
DeserializationContext dCtx= DeserializationContextFactory.newInstance().createDeserializationContext();
vcResponseCodec.deserialize(xmlType, xmlInputStream, dCtx);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
There must be something I'm missing, because I'm sure there is a simple way to
Marshall my object back to XML. Am I using the wrong API? Can someone please
shed some light on this? Any insight or suggestions are much appreciated.
Thank you,
Matt