[jboss-user] [JBossWS] - return type polymorphism issue, please help
Hi all, I guess this should be easy for some of you experts, so I hope to get an answer
here, after searching for this bug for a couple of hours now.
Here's the situation:
| @XmlJavaTypeAdapter(AbstractInodeImpl.Adapter.class)
| public interface Inode extends Serializable, Comparable<Inode>, Cloneable
| {
| //definition of getters,setters,...
| }
|
| @Entity
| @Table(name="inode")
| @Inheritance(strategy=InheritanceType.SINGLE_TABLE)
| @DiscriminatorColumn(
| name="type",
| discriminatorType=DiscriminatorType.STRING
| )
|
| @XmlSeeAlso({FileInode.class, DirectoryInode.class})
| public abstract class AbstractInodeImpl implements Inode
| {
| //implementation of getters,setters,...
|
| static public class Adapter extends XmlAdapter<AbstractInodeImpl, Inode>
| {
| public Inode unmarshal(AbstractInodeImpl v)
| {
| return v;
| }
| public AbstractInodeImpl marshal(Inode v)
| {
| return (AbstractInodeImpl)v;
| }
| }
| }
|
| @Entity
| @Name("directoryInode")
| @DiscriminatorValue("directory")
| public class DirectoryInode extends AbstractInodeImpl implements Serializable
| {
| // more implementation
| }
|
| @Entity
| @Name("fileInode")
| @DiscriminatorValue("file")
| public class FileInode extends AbstractInodeImpl implements Serializable
| {
| // even more...
| }
|
| @Stateless
| @WebService(name = "FileSystemService", serviceName =
"FileSystemService")
| @Name("fileSystemService")
| @WebContext(contextRoot="/tumbolia/services",
urlPattern="/FileSystemService")
| public class FileSystemServiceImpl implements FileSystemService, Serializable
| {
| @WebMethod
| public List<Inode> getAllChildren(String inodePath)
| {
| List<Inode> children =
((FileSystemManager)Component.getInstance("fileSystemManager",
true)).getInodePathChildren(inodePath);
|
| return children;
| }
| }
|
I generate my JAXB beans with wsconsume or wsimport (have tried both) from the wsdl that
was automatically generated.
When I call the webservice in the last bean, I get this exception:
| [javax.xml.bind.UnmarshalException: Unable to create an instance of
com.acepostproduction.tumbolia.webservice.AbstractInodeImpl
| - with linked exception:
| [java.lang.InstantiationException]]
| com.acepostproduction.virtuolia.exceptions.WsException:
[TumboliaFileSystemCommunicator] Error while calling getAllChildren():
javax.xml.bind.UnmarshalException
| - with linked exception:
| [javax.xml.bind.UnmarshalException: Unable to create an instance of
com.acepostproduction.tumbolia.webservice.AbstractInodeImpl
| - with linked exception:
| [java.lang.InstantiationException]]
| at
com.acepostproduction.virtuolia.communicator.TumboliaFileSystemCommunicator.getAllChildren(TumboliaFileSystemCommunicator.java:87)
| at
com.acepostproduction.virtuolia.VirtuoliaDiskDriver.startSearch(VirtuoliaDiskDriver.java:340)
| ...
|
Any ideas why the polymorphism on the return value is failing?
It would be great if someone could give me a hint here.
bram
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