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Eugene Tenkaev edited comment on JENA-1006 at 8/5/15 9:15 PM: -------------------------------------------------------------- Yes I read that, but how I can get from {{DatasetGraph}} or {{Graph}} the {{Dataset}}? Is this {code:java} Dataset dataset = TDBFactory.createDataset(); DatasetGraph datasetGraph = dataset.asDatasetGraph(); Graph graph = datasetGraph.getDefaultGraph(); {code} a good solution? Is {{dataset.asDatasetGraph()}} has a bad side? Or maybe this: {code:java} DatasetGraph datasetGraph = TDBFactory.createDatasetGraph(); Graph graph = datasetGraph.getDefaultGraph(); Dataset dataset = DatasetImpl.wrap(datasetGraph); {code} {{DatasetImpl.wrap}} good solution? was (Author: hronom): Yes I read that, but how I can get from {{DatasetGraph}} or {{Graph}} the {{Dataset}}? Is this {code:java} Dataset dataset = TDBFactory.createDataset(); DatasetGraph datasetGraph = dataset.asDatasetGraph(); Graph graph = datasetGraph.getDefaultGraph(); {code} a good solution? Is {{dataset.asDatasetGraph()}} has a bad side? > How read and add triples to `Graph` at the same time? > ----------------------------------------------------- > > Key: JENA-1006 > URL: https://issues.apache.org/jira/browse/JENA-1006 > Project: Apache Jena > Issue Type: Question > Components: Core, TDB > Affects Versions: Jena 2.13.0 > Reporter: Eugene Tenkaev > Priority: Minor > Fix For: Jena 3.0.1 > > > Here is my code: > {code:java} > public class App { > public static void main(String[] args) { > DatasetGraph datasetGraph = TDBFactory.createDatasetGraph(); > Graph graph = datasetGraph.getDefaultGraph(); > // Fill graph. > graph.add( > new Triple( > NodeFactory.createURI("www.test.org/unit13"), > NodeFactory.createURI("name"), > NodeFactory.createLiteral("Unit 13", "en") > ) > ); > graph.add( > new Triple( > NodeFactory.createURI("www.test.org/unit13"), > NodeFactory.createURI("type"), > NodeFactory.createURI("robot") > ) > ); > graph.add( > new Triple( > NodeFactory.createURI("www.test.org/unit13"), > NodeFactory.createURI("creationYear"), > NodeFactory.createURI("2015") > ) > ); > // Test > ExtendedIterator<Triple> iter = graph.find( > Node.ANY, > NodeFactory.createURI("creationYear"), > NodeFactory.createURI("2015") > ); > while (iter.hasNext()) { > Triple triple = iter.next(); > Node subject = triple.getSubject(); > // Exception here. > graph.add( > new Triple( > subject, NodeFactory.createURI("status"), > NodeFactory.createURI("available") > ) > ); > } > } > } > {code} > This code gives me exception: > {noformat} > Exception in thread "main" java.util.ConcurrentModificationException: > Iterator: started at 8, now 9 > 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$4.hasNext(Iter.java:318) > at org.apache.jena.atlas.iterator.Iter.hasNext(Iter.java:942) > at > com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90) > at com.github.hronom.test.jena.App.main(App.java:48) > 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:606) > at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140) > {noformat} > I accept this. > But how I must change code, to add meta info {{<status> <available>}} to > every {{<www.test.org/unit13>}} that has {{<creationYear> <2015>}}? > Test project on [GitHub|https://github.com/Hronom/test-jena] > Please help me:P -- This message was sent by Atlassian JIRA (v6.3.4#6332)