And here is the stack trace. Sorry about sending multiple emails.
java.util.ConcurrentModificationException: Iterator: started at 6, now 7
at
com.hp.hpl.jena.tdb.sys.DatasetControlMRSW.policyError(DatasetControlMRSW.java:157)
at
com.hp.hpl.jena.tdb.sys.DatasetControlMRSW.access$000(DatasetControlMRSW.java:32)
at
com.hp.hpl.jena.tdb.sys.DatasetControlMRSW$IteratorCheckNotConcurrent.checkCourrentModification(DatasetControlMRSW.java:110)
at
com.hp.hpl.jena.tdb.sys.DatasetControlMRSW$IteratorCheckNotConcurrent.hasNext(DatasetControlMRSW.java:118)
at org.apache.jena.atlas.iterator.Iter$4.hasNext(Iter.java:318)
at org.apache.jena.atlas.iterator.Iter$4.hasNext(Iter.java:318)
at org.apache.jena.atlas.iterator.Iter.hasNext(Iter.java:916)
at
com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at
com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at
com.hp.hpl.jena.util.iterator.FilterIterator.hasNext(FilterIterator.java:54)
at
com.hp.hpl.jena.graph.compose.CompositionBase$2.hasNext(CompositionBase.java:94)
at
com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:103)
at
com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at
com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:103)
at
com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:103)
at
com.hp.hpl.jena.reasoner.rulesys.impl.TopLevelTripleMatchFrame.nextMatch(TopLevelTripleMatchFrame.java:55)
at
com.hp.hpl.jena.reasoner.rulesys.impl.LPInterpreter.run(LPInterpreter.java:327)
at
com.hp.hpl.jena.reasoner.rulesys.impl.LPInterpreter.next(LPInterpreter.java:189)
at com.hp.hpl.jena.reasoner.rulesys.impl.Generator.pump(Generator.java:253)
at com.hp.hpl.jena.reasoner.rulesys.impl.Generator.pump(Generator.java:240)
at
com.hp.hpl.jena.reasoner.rulesys.impl.LPBRuleEngine.pump(LPBRuleEngine.java:311)
at
com.hp.hpl.jena.reasoner.rulesys.impl.LPTopGoalIterator.moveForward(LPTopGoalIterator.java:107)
at
com.hp.hpl.jena.reasoner.rulesys.impl.LPTopGoalIterator.hasNext(LPTopGoalIterator.java:222)
at
com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at
com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at
com.hp.hpl.jena.util.iterator.FilterIterator.hasNext(FilterIterator.java:54)
at
com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at
com.hp.hpl.jena.util.iterator.FilterIterator.hasNext(FilterIterator.java:54)
at
com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at
com.hp.hpl.jena.util.iterator.FilterIterator.hasNext(FilterIterator.java:54)
at
com.hp.hpl.jena.graph.compose.CompositionBase$2.hasNext(CompositionBase.java:94)
at
com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:103)
at
com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at
com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:103)
at
com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:103)
at
com.hp.hpl.jena.reasoner.rulesys.impl.TopLevelTripleMatchFrame.nextMatch(TopLevelTripleMatchFrame.java:55)
at
com.hp.hpl.jena.reasoner.rulesys.impl.LPInterpreter.run(LPInterpreter.java:327)
at
com.hp.hpl.jena.reasoner.rulesys.impl.LPInterpreter.next(LPInterpreter.java:189)
at
com.hp.hpl.jena.reasoner.rulesys.impl.LPTopGoalIterator.moveForward(LPTopGoalIterator.java:98)
at
com.hp.hpl.jena.reasoner.rulesys.impl.LPTopGoalIterator.hasNext(LPTopGoalIterator.java:222)
at
com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at
com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at
com.hp.hpl.jena.util.iterator.FilterIterator.hasNext(FilterIterator.java:54)
at
com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at
com.hp.hpl.jena.util.iterator.FilterIterator.hasNext(FilterIterator.java:54)
at com.hp.hpl.jena.graph.impl.GraphBase.containsByFind(GraphBase.java:331)
at
com.hp.hpl.jena.graph.impl.GraphBase.graphBaseContains(GraphBase.java:309)
at com.hp.hpl.jena.graph.impl.GraphBase.contains(GraphBase.java:301)
at com.hp.hpl.jena.graph.impl.GraphBase.contains(GraphBase.java:318)
at com.hp.hpl.jena.rdf.model.impl.ModelCom.contains(ModelCom.java:1222)
at
com.hp.hpl.jena.rdf.model.impl.ResourceImpl.hasProperty(ResourceImpl.java:340)
at
com.hp.hpl.jena.ontology.impl.OntClassImpl.isRestriction(OntClassImpl.java:868)
at
com.eduworks.ontology.OntologyClass.getJSONRepresentation(OntologyClass.java:457)
at
com.eduworks.ontology.OntologyInstance.createInstance(OntologyInstance.java:64)
at com.eduworks.ontology.Ontology.createInstance(Ontology.java:396)
at
com.eduworks.ontology.test.TestOntology.test_LoadExternalStructure(TestOntology.java:334)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at
org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
On Wed, Aug 13, 2014 at 9:21 AM, Devlin Junker <devlin.jun...@eduworks.com>
wrote:
> I forgot to mention that this is happening during a Write Transaction on
> the Dataset, in case that is important.
>
> Devlin
>
>
> On Wed, Aug 13, 2014 at 9:19 AM, Devlin Junker <devlin.jun...@eduworks.com
> > wrote:
>
>> Hi,
>>
>> I am having a little bit of trouble implementing the TDB store for my
>> Jena Ontologies. I have been able to solve most of the issues that I've
>> come across, but I have become frustrated with the view request functions
>> that the Ontology objects define.
>>
>> I am trying to get a list of all of the restrictions that define a
>> certain OntClass, but while I am looping through all of the superclasses
>> for the class I receive a ConcurrentModificationException when calling the
>> is[Restriction, DatatypeProperty, and SomeValuesFromRestriction] calls.
>>
>> Apparently it is happening when finding the triple on the graph that
>> would define it as the certain view type. The exception is thrown on the
>> iterator.hasNext in GraphBase.containsByFind().
>>
>> The application I am running is only single threaded (I think, it is in a
>> JUnit Test Case) so I don't think any other modifications should actually
>> be happening to the Dataset while I am checking against the View Type.
>>
>> I've included the important code below and highlighted the area where the
>> exception is thrown.
>>
>> Thanks for any help you can offer,
>> Devlin
>>
>> List<OntClass> supers = jenaClass.listSuperClasses().toList();
>>
>> for(int index = 0; index < supers.size(); index++){
>> OntClass cls = supers.get(index);
>> if(cls.isRestriction()){
>> Restriction r = cls.asRestriction();
>> String valueId = "";
>> OntProperty prop = r.getOnProperty();
>> Resource restrictionValue;
>>
>> if(r.isAllValuesFromRestriction()){
>> restrictionValue = r.asAllValuesFromRestriction().getAllValuesFrom();
>> }else if(r.isSomeValuesFromRestriction()){
>> restrictionValue = r.asSomeValuesFromRestriction().getSomeValuesFrom();
>> }else{
>> // TODO: Implement Cardinality Restrictions
>> throw new RuntimeException("Unexpected Restriction Type");
>> }
>> if(prop.isDatatypeProperty()){
>> // TODO: More DataTypes
>> if(restrictionValue.equals(XSD.xint) ||
>> restrictionValue.equals(XSD.integer)){
>> valueId = "xsd:integer";
>> }else if(restrictionValue.equals(XSD.xstring)){
>> valueId = "xsd:string";
>> }else if(restrictionValue.equals(XSD.xdouble)){
>> valueId = "xsd:double";
>> }else if(restrictionValue.equals(XSD.dateTime)){
>> valueId = "xsd:dateTime";
>> }else{
>> throw new RuntimeException("Unrecognized DataType:
>> "+restrictionValue.toString());
>> }
>> }else{
>> valueId = getIdentifier(restrictionValue.getURI());
>> }
>> try{
>> if(r.isAllValuesFromRestriction()){
>> JSONArray restriction = rest.optJSONArray(getIdentifier(prop.getURI()));
>> if(restriction == null || !restriction.toString().contains(valueId)){
>> rest.append(getIdentifier(prop.getURI()), valueId);
>> }
>> }else if(r.isSomeValuesFromRestriction()){
>> JSONArray requirement = req.optJSONArray(getIdentifier(prop.getURI()));
>> // TODO: HACK (For some reason during update I am getting duplicate of
>> the some value restrictions)
>> if(requirement == null || !requirement.toString().contains(valueId)){
>> req.append(getIdentifier(prop.getURI()), valueId);
>> }
>> }else{
>> // TODO: Implement Cardinality Restrictions
>> throw new RuntimeException("Unexpected Restriction Type");
>> }
>> }catch(JSONException e){
>> throw new RuntimeException("Error Creating JSON Object for Property " +
>> prop);
>> }
>> }
>> }
>>
>
>
