Stephen:
Unfortunately, I still can not see what is wrong, other than stepping to
the line of code and seeing that there is a problem in the castor code
where is dereferencing a null object. I need to get something working
for Monday morning... Unless there is a fix for using groups, my only
solution may be to not use groups in schemas.
Will a mapping file help with this problem. If so I was also having some
trouble with the mapping tool:
Mapping class: com.nortel.schema.code.Data.sceStatistics.SceStatistics
Mapping file:
D:\Workspaces\eclipse311\SCESchemaCode/schema/Maps/sceStatisticsMap.xml
org.exolab.castor.mapping.MappingException: Nested error:
java.lang.NullPointerException
java.lang.NullPointerException
at
org.exolab.castor.xml.Marshaller.processAttribute(Marshaller.java:2320)
at
org.exolab.castor.xml.Marshaller.marshal(Marshaller.java:1323)
at
org.exolab.castor.xml.Marshaller.marshal(Marshaller.java:1824)
at org.exolab.castor.xml.Marshaller.marshal(Marshaller.java:821)
at
org.exolab.castor.tools.MappingTool.write(MappingTool.java:478)
at
com.nortel.sce.Map.MappingCreator.createMap(MappingCreator.java:68)
at
com.nortel.sce.Map.CreateClassMaps.createMappingFiles(CreateClassMaps.ja
va:46)
at
com.nortel.sce.Map.CreateClassMaps.main(CreateClassMaps.java:88)
Barbara
-----Original Message-----
From: Stephen Bash [mailto:[EMAIL PROTECTED]
Sent: Friday, March 03, 2006 1:08 PM
To: [email protected]
Subject: Re: [castor-user] mapping and binding
Barbara-
I came to the same conclusion about the NPE. Because you are using
the SourceGenerator, the descriptors referenced in the code snippet
you quoted are actually Java code that you can open up and look at,
which may or may not be helpful.
What you're actually interested in is the FieldDescriptor, but you
might be able to find that based on the ClassDescriptor (just follow
the method calls) -- I think Castor names the classes in a fairly
obvious way, so something like NodeTypeClassDescriptor or
DescriptionGroupFieldDescriptor would be a good place to start
looking. If you open the FieldDescriptor (whatever it ends up being
named) and check what its getFieldType method is doing, that might
give some hint to what is happening. Unfortunately we're rapidly
crossing into code I know nothing about... If getFieldType simply
returns null, that comes from the SourceGenerator, and I'm not much
help telling you why it wrote that, but maybe someone else can.
Let me know what you find.
Stephen
On 3/3/06, Barbara Prechtl <[EMAIL PROTECTED]> wrote:
>
> Stephen:
>
> I tried the generateImportedSchema to true and it still did not work.
I
> sent you the place in the unmarshaller where it is failing. Please let
> me know if you still want me to put together an example.... cause I
> will, I just have lots of other unrelated stuff in the schema that is
> not necessary to send.
>
> Barbara
>
> -----Original Message-----
> From: Stephen Bash [mailto:[EMAIL PROTECTED]
> Sent: Friday, March 03, 2006 12:39 PM
> To: [email protected]
> Subject: Re: [castor-user] mapping and binding
>
> Barbara-
>
> What version of Castor are you using? I don't know much about the
> SourceGeneration side, but with the correct version of Castor I might
> be able to look at the stack trace and figure out what is happening.
> Next question, can you produce the XML snippet you mentioned from
> marshalling? I'll try to look into it and see if I can glean any
> information from the stack trace.
>
> Stephen
>
>
> On 3/3/06, Barbara Prechtl <[EMAIL PROTECTED]> wrote:
> > Stephan:
> >
> > Thanks for your help. I did get the Java objects to marshall without
> the
> > use of a mapping file.
> >
> > I am now having problems with the unmarshalling of documents that
use
> > elements that are of a group type. For instance I have defined in my
> > schema a description group as follows:
> >
> > <xsd:group name="DescriptionGroup">
> > <xsd:sequence>
> > <xsd:element name="description"
> > type="xsd:string" minOccurs="0" maxOccurs="1"/>
> > </xsd:sequence>
> > </xsd:group>
> >
> > This is used in my NodeType definition:
> >
> > <xsd:complexType name="NodeType">
> > <xsd:sequence>
> > <xsd:group
> > ref="shr:DescriptionGroup"></xsd:group>
> > </xsd:sequence>
> > </xsd:complexType>
> >
> >
> > When in my instance document I have the description the
unmarshalling
> > throws an exception.
> >
> > <node>
> > <description> comment </description>
> > </node>
> >
> > When I create the classes with the source generator I use the
> following
> > flags:
> >
> > generateMappingFiles=true
> > createMarshalMethods=true
> > GenerateImportedSchemas=false
> > Validation=true
> >
> > I am getting an error every time I try to use the description
element
> in
> > a document. I have noticed that this happens with other group types.
> > Does group unmarshalling work?
> >
> > Thanks,
> > Barbara
> >
> > The error I get is as follows:
> >
> > Error occurred in read. Target Exception is::
> > org.exolab.castor.xml.MarshalException : null
> > null{file: [not available]; line: 64; column: 18}
> > at
> > org.exolab.castor.xml.Unmarshaller.unmarshal(Unmarshaller.java:669)
> > at
> > org.exolab.castor.xml.Unmarshaller.unmarshal(Unmarshaller.java:563)
> > at
> >
>
com.nortel.sce.xml.utils.XmlToJava.readXMLinstanceToObject(XmlToJava.jav
> > a:143)
> > at
> > com.nortel.sce.xml.utils.XmlUtils.unmarshallXML(XmlUtils.java:89)
> > at
> > com.nortel.sce.model.ContainerData.read(ContainerData.java:109)
> > at
> > com.nortel.sce.model.ContainerData.<init>(ContainerData.java:52)
> > at
> >
>
com.nortel.sce.model.ApplicationData.getContainerByName(ApplicationData.
> > java:135)
> > at com.nortel.sce.model.ModelData.main(ModelData.java:273)
> > Caused by: java.lang.NullPointerException
> > at
> >
>
org.exolab.castor.xml.UnmarshalHandler.startElement(UnmarshalHandler.jav
> > a:1994)
> > at
> >
>
org.exolab.castor.xml.UnmarshalHandler.startElement(UnmarshalHandler.jav
> > a:1375)
> > at
> >
org.apache.xerces.parsers.SAXParser.startElement(SAXParser.java:1376)
> > at
> >
>
org.apache.xerces.validators.common.XMLValidator.callStartElement(XMLVal
> > idator.java:1214)
> > at
> >
>
org.apache.xerces.framework.XMLDocumentScanner$ContentDispatcher.dispatc
> > h(XMLDocumentScanner.java:1171)
> > at
> >
>
org.apache.xerces.framework.XMLDocumentScanner.parseSome(XMLDocumentScan
> > ner.java:381)
> > at
> > org.apache.xerces.framework.XMLParser.parse(XMLParser.java:1081)
> > at
> > org.exolab.castor.xml.Unmarshaller.unmarshal(Unmarshaller.java:655)
> >
> >
> >
> >
> > -----Original Message-----
> > From: Stephen Bash [mailto:[EMAIL PROTECTED]
> > Sent: Friday, March 03, 2006 8:30 AM
> > To: [email protected]
> > Subject: Re: [castor-user] mapping and binding
> >
> > Barbara-
> >
> > I'm not much of an expert on the binding-file side, but I use
mapping
> > files all the time. The short answer is no, you don't need both,
but
> > yes, they both describe Java object <-> XML relations.
> >
> > In general, I believe, the binding file is used to create Java code
> > (that can then be compiled and used in an application) from an XML
> > Schema. The binding file is most often (only?) used with the Castor
> > SourceGenerator, which creates Java classes that model an XML
schema,
> > at which point Castor also creates extra classes (ClassDescriptors
and
> > FieldDescriptors) that describe how the Java objects "map" to XML.
> >
> > The mapping file provides an alternate method for the user to
specify
> > how Java objects transform into XML content. I tend to think of
this
> > as how one starts with a Java object model and then creates the XML
> > structure from it, but it is much more flexible than that.
> >
> > Where the two methods somewhat meet is the
> > ClassDescriptor/FieldDescriptor level. When a user loads a mapping,
> > Castor reads the mapping file and internally creates the appropriate
> > descriptors. If the SourceGenerator was used, the descriptors exist
> > as compiled classes and are instantiated as they are needed (thus
the
> > mapping file usually isn't required).
> >
> > That might be more information than you needed, but hopefully it
> > answers the question. Let us know if you have further questions.
> >
> > Stephen
> >
> > On 3/3/06, Barbara Prechtl <[EMAIL PROTECTED]> wrote:
> > >
> > >
> > >
> > > To whom it may concern:
> > >
> > >
> > >
> > > I was wondering what the difference between a mapping file and a
> > binding
> > > file is.
> > >
> > >
> > >
> > > Is this correct:
> > >
> > >
> > >
> > > A mapping file is used for writing java objects to xml.
> > >
> > > A binding file is used to read xml to java objects.
> > >
> > >
> > >
> > > They both seem to describe the element to object relation. Are
both
> > needed?
> > >
> > >
> > >
> > > Thanks,
> > >
> > > Barbara
> >
> > -------------------------------------------------
> > If you wish to unsubscribe from this list, please
> > send an empty message to the following address:
> >
> > [EMAIL PROTECTED]
> > -------------------------------------------------
> >
> >
>
> -------------------------------------------------
> If you wish to unsubscribe from this list, please
> send an empty message to the following address:
>
> [EMAIL PROTECTED]
> -------------------------------------------------
>
>
-------------------------------------------------
If you wish to unsubscribe from this list, please
send an empty message to the following address:
[EMAIL PROTECTED]
-------------------------------------------------
