[ http://issues.apache.org/jira/browse/TUSCANY-475?page=all ]
ant elder resolved TUSCANY-475:
-------------------------------
Resolution: Fixed
Applied. Thanks for the patch Kelvin!
> Class cast exception on
> -----------------------
>
> Key: TUSCANY-475
> URL: http://issues.apache.org/jira/browse/TUSCANY-475
> Project: Tuscany
> Type: Bug
> Components: Java SDO Implementation
> Versions: Java-M1
> Environment: Windows XP
> Reporter: Simon Laws
> Attachments: T475.patch
>
> I'm trying to retrieve rows from a database via the relational DAS. When I
> run my test prgram I get
> Exception in thread "main" java.lang.ClassCastException:
> org.eclipse.emf.ecore.util.EcoreEList$Dynamic incompatible with
> commonj.sdo.DataObject
> at
> org.apache.tuscany.sdo.impl.DataObjectImpl.getDataObject(DataObjectImpl.java:322)
> at
> org.apache.tuscany.sdo.interop.SDOInterop.testReadAndWriteRelationalDB2(SDOInterop.java)
> at org.apache.tuscany.sdo.interop.SDOInterop.main(SDOInterop.java:136)
> The code looks like.
> CommandGroup commandGroup =
> CommandGroup.FACTORY.createCommandGroup(getClass().getResourceAsStream("interopconfig-db2.xml"));
> Command read = commandGroup.getCommand("all type");
> DataObject root = read.executeQuery();
> DataObject firstRow = root.getDataObject("alltype[0]");
> Now I expect to get a "firstRow" DataObject back. Indeed
> DataObjectImpl.getDataObject() casts the return to a DataObject
> public DataObject getDataObject(String path)
> {
> return (DataObject)get(path);
> }
> However the the DataObjectUtil.get() operation creates an Accessor and calls
> getAndRecycle
> public static Object get(DataObject dataObject, String path)
> {
> Property property = dataObject.getType().getProperty(path);
> if (property != null) {
> return dataObject.get(property);
> } else {
> return Accessor.create((EObject)dataObject, path).getAndRecyle();
> }
> }
> getAndRecycle call get which, because I have specified a 0 index, just
> returns the value which happens to be of type EcoreEList$Dynamic
> So while I may have an error in my code somewhere or it might not be
> retrieving any data from the database a class cast exception inside of SDO
> doesn't seem like the correct way to tell me.
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