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Re: [eclipselink-users] XML Object Reference Mapping 
Hello Neil,

Thanks for the support.
We also found out that the workbench.cmd file in 1.0M6 is missing the line "set CLASSPATH=%CLASSPATH%;%THIS%..\..\jlib\jpa\persistence.jar"
Because without this jar file you wil get an exception when exporting a Project Deployment XML. 

greetz,
Leon

Neil Hauge wrote:

Hi Leon,
We're looking into this. I can tell you that there is a limitation in the Workbench right now on being able to specify the primary key for the reference descriptor. The approach you are taking with the afterload methods appears to be correct. We'll get back to you on this soon. 

Neil

Leon Derks wrote:
During debugging I noticed that IndustrialFamily had no primary key (code). This was giving the exception. I could not define a primary key for IndustrialFamily in the workbench. Is this currently not supported?
I tried to workaround this problem using afterload methods and doing this in Java. 

This is my code:

public static void afterFamilyLoader(ClassDescriptor familyDescriptor) {
       familyDescriptor.setJavaClass(IndustrialFamily.class);
       familyDescriptor.addPrimaryKeyFieldName("@code");
   }
public static void afterProductLoader(ClassDescriptor productDescriptor) { XMLObjectReferenceMapping product = new XMLObjectReferenceMapping(); 
       product.setAttributeName("industrialFamily");
       product.setReferenceClass(IndustrialFamily.class);
product.addSourceToTargetKeyFieldAssociation("@familyCode", "@code"); 
       productDescriptor.addMapping(product);
   }
I don't get a stacktrace any more. But now the family is null in my Product Object. 
Is there still something missing in my mapping?

Leon





Leon Derks wrote:

Hello
I have a problem (stacktrace) using the XML Object Reference Mapping in the workbench tool from EclipseLink 1.0M6. 

This is my xml data:
<CatalogProduct code="123JI" name="BSN Lamp" type="Lamp" familyCode="BSN-BC4H"> 

.....

</CatalogProduct>

<IndustrialFamilies>
<IndustrialFamily code="BSN-BC4H" name="Family Lamps" productCategoryCode="Lamps"/> 

</IndustrialFamilies>
I mapped this in the workbench as an XML Object Reference with Source Xpath=@familyCode and Target Xpath=@code.
In the eclipselink documentation I read that XML Object Reference is only supported in Java and not in the workbench. Is this still the case?
Running an unmarshall application in Eclipse, results in the following stacktrace: 


javax.xml.bind.UnmarshalException

- with linked exception:

[java.lang.ArrayIndexOutOfBoundsException: -1]
at org.eclipse.persistence.jaxb.JAXBUnmarshaller.unmarshal(JAXBUnmarshaller.java:102)
at com.philips.lighting.research.jaxb.UnmarshallXml.main(UnmarshallXml.java:31) 

Caused by: java.lang.ArrayIndexOutOfBoundsException: -1

    at java.util.Vector.setElementAt(Unknown Source)
at org.eclipse.persistence.oxm.mappings.XMLObjectReferenceMapping.buildReference(XMLObjectReferenceMapping.java:147)
at org.eclipse.persistence.internal.oxm.XMLObjectReferenceMappingNodeValue.attribute(XMLObjectReferenceMappingNodeValue.java:91)
at org.eclipse.persistence.oxm.record.UnmarshalRecord.startElement(UnmarshalRecord.java:600)
at org.eclipse.persistence.internal.oxm.XMLRelationshipMappingNodeValue.processChild(XMLRelationshipMappingNodeValue.java:72)
at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.startElement(XMLCompositeCollectionMappingNodeValue.java:89)
at org.eclipse.persistence.oxm.record.UnmarshalRecord.startElement(UnmarshalRecord.java:558)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at org.eclipse.persistence.internal.oxm.record.XMLReader.parse(XMLReader.java:99)
at org.eclipse.persistence.internal.oxm.record.SAXUnmarshaller.unmarshal(SAXUnmarshaller.java:216)
at org.eclipse.persistence.internal.oxm.record.SAXUnmarshaller.unmarshal(SAXUnmarshaller.java:193)
at org.eclipse.persistence.oxm.XMLUnmarshaller.unmarshal(XMLUnmarshaller.java:274)
at org.eclipse.persistence.jaxb.JAXBUnmarshaller.unmarshal(JAXBUnmarshaller.java:100) 

    ... 1 more


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