ClassCastException when adding elements to list-valued property when
ChangeSummary is switched on
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Key: TUSCANY-3403
URL: https://issues.apache.org/jira/browse/TUSCANY-3403
Project: Tuscany
Issue Type: Bug
Components: Java SDO Implementation
Affects Versions: Java-SDO-1.1
Reporter: Sören Balko
Hi!
I have observed a ClassCastException (see below) that occurs when using change
tracking (i.e., the ChangeSummary) feature of a data graph. Specifically, I
have a root object "R" in that data graph which contains a list of other data
objects ("flowElement"). The nodes, in turn, do have another property
"outgoing" holding a list of strings. I have initially (w/o change tracking)
created the root object of the DataGraph and added a first data object n1 to
the "flowElement" list. Then, I switch on change tracking (using the
ChangeSummary instance from the DataGraph) and create another data object n2
which also gets added to the "flowElement" list. Afterwards, both the root
object and n2 are returned by ChangeSummary.getChangedDataObject(). When I then
try to add a string to the (hitherto empty) n1.outgoing list, I get the
exception below.
Please note that adding the string to n1.outgoing works fine when (1) either
change tracking is completely switched off or (2) change tracking is switched
on BEFORE n1 is created. What is also worth mentioning is that I am using
static data types which are generated from an XSD schema (specifically, the
BPMN 2.0 XSD files, see http://www.omg.org/spec/BPMN/2.0/).
Thank you very much for having a look into that issue. I am happy to provide
further details, if required.
Cheers,
Sören
java.lang.ClassCastException: java.lang.String cannot be cast to
java.util.Collection
at
org.eclipse.emf.ecore.change.util.ChangeRecorder.handleFeature(ChangeRecorder.java:428)
at
org.eclipse.emf.ecore.change.util.ChangeRecorder.notifyChanged(ChangeRecorder.java:312)
at
org.apache.tuscany.sdo.impl.ChangeSummaryImpl$SDOChangeRecorder.notifyChanged(ChangeSummaryImpl.java:486)
at
org.apache.tuscany.sdo.impl.DataObjectImpl.eNotify(DataObjectImpl.java:1374)
at
org.eclipse.emf.ecore.util.EcoreEList.dispatchNotification(EcoreEList.java:234)
at
org.eclipse.emf.common.notify.impl.NotifyingListImpl.addUnique(NotifyingListImpl.java:302)
at org.eclipse.emf.common.util.BasicEList.add(BasicEList.java:600)
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