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Asked: 2026-06-14T03:56:23+00:00

When using Moxy as the JAXB Implementation, the following class leads to an exception:

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When using Moxy as the JAXB Implementation,
the following class leads to an exception:

@XmlRootElement(name="fraPage")
@XmlAccessorType(XmlAccessType.FIELD)
case class FraPage(@ScalaXmlTypeAdapter(value=classOf[FraSeqAdapter]) @ScalaXmlElementWrapper(name="fras") data:Seq[Fra],@XmlTransient id: FraPageId, @ScalaXmlElement header:FraPageHeader) extends PageWithId[FraPageId]{


  private def this()= this(null,null,null)
  lazy val isEmpty = data.isEmpty



}


Exception in thread "main" javax.xml.bind.JAXBException: 0
 - with linked exception:
[java.lang.ArrayIndexOutOfBoundsException: 0]
    at org.eclipse.persistence.jaxb.JAXBContext$TypeMappingInfoInput.createContextState(JAXBContext.java:908)
    at org.eclipse.persistence.jaxb.JAXBContext.<init>(JAXBContext.java:157)
    at org.eclipse.persistence.jaxb.JAXBContextFactory.createContext(JAXBContextFactory.java:170)
    at org.eclipse.persistence.jaxb.JAXBContextFactory.createContext(JAXBContextFactory.java:157)
    at org.eclipse.persistence.jaxb.JAXBContextFactory.createContext(JAXBContextFactory.java:117)
    at org.eclipse.persistence.jaxb.JAXBContextFactory.createContext(JAXBContextFactory.java:107)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:202)
    at javax.xml.bind.ContextFinder.find(ContextFinder.java:363)
    at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:574)
    at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:522)
    at com.gottex.gottware.services.Dummy$.main(Dummy.scala:16)
    at com.gottex.gottware.services.Dummy.main(Dummy.scala)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
    at org.eclipse.persistence.jaxb.compiler.MappingsGenerator.generateDirectCollectionMapping(MappingsGenerator.java:2004)
    at org.eclipse.persistence.jaxb.compiler.MappingsGenerator.generateMapping(MappingsGenerator.java:501)
    at org.eclipse.persistence.jaxb.compiler.MappingsGenerator.generateMappings(MappingsGenerator.java:2265)
    at org.eclipse.persistence.jaxb.compiler.MappingsGenerator.generateMappings(MappingsGenerator.java:2225)
    at org.eclipse.persistence.jaxb.compiler.MappingsGenerator.generateProject(MappingsGenerator.java:201)
    at org.eclipse.persistence.jaxb.compiler.Generator.generateProject(Generator.java:185)
    at org.eclipse.persistence.jaxb.JAXBContext$TypeMappingInfoInput.createContextState(JAXBContext.java:913)
    at org.eclipse.persistence.jaxb.JAXBContext$TypeMappingInfoInput.createContextState(JAXBContext.java:905)
    ... 20 more

Process finished with exit code 1

What is happening and why? I am using JDK 1.6.0.25 with Moxy version 2.4.0

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1 Answer

  1. Editorial Team

    Note: I’m the EclipseLink JAXB (MOXy) lead and a member of the JAXB (JSR-222) expert group.

    This appears to be a MOXy bug. There is a method called hasActualTypeArguments() in the org.eclipse.persistence.jaxb.javamodel.reflection.JavaClassImpl class that is returning a false positive. You can track our progress on this issue using the following bug:

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