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From Reto Bachmann-Gmür <r...@wymiwyg.com>
Subject Re: ERROR: Quad: object cannot be null
Date Fri, 12 Jul 2013 21:50:30 GMT
Thanks Minto. I would rather not withdraw the release candidate but
have a new release very soon (max a couple of weeks).

Reto

On Fri, Jul 12, 2013 at 10:48 PM, Minto van der Sluis <minto@xup.nl> wrote:
> Fixed this with commit r1502677 (CLEREZZA-802)
>
> Please have a close look. Might need to be part of the pending release
> as well.
>
> Regards,
>
> Minto
>
> Op 12-7-2013 18:14, Minto van der Sluis schreef:
>> This time I end up with an NPE, see stack below.
>>
>> My changes resulted in the following
>>
>>     public Object executeSparqlQuery(String query, TripleCollection
>> defaultGraph, boolean forceFastlane) throws ParseException {
>>         TcProvider singleTargetTcProvider = null;
>>         if (forceFastlane) {
>>             singleTargetTcProvider = getSingleTargetTcProvider();
>>         } else {
>>             final UriRef defaultGraphName = new
>> UriRef("urn:x-temp:/kjsfadfhfasdffds");
>>             SparqlPreParser sparqlPreParser = new SparqlPreParser(this);
>>             final Set<UriRef> referencedGraphs =
>> sparqlPreParser.getReferredGraphs(query, defaultGraphName);
>>             if ((referencedGraphs != null) &&
>> (!referencedGraphs.contains(defaultGraphName))) {
>>                 singleTargetTcProvider =
>> getSingleTargetTcProvider(referencedGraphs);
>>             }
>>         }
>>
>>         if ((singleTargetTcProvider != null) && (singleTargetTcProvider
>> instanceof QueryableTcProvider)) {
>>             return
>> ((QueryableTcProvider)singleTargetTcProvider).executeSparqlQuery(query,
>> null);
>>         }
>>         final QueryEngine queryEngine = this.queryEngine;
>>         if (queryEngine != null) {
>>             return queryEngine.execute(this, defaultGraph, query);
>>         } else {
>>             throw new NoQueryEngineException();
>>         }
>>     }
>>
>>    private TcProvider getSingleTargetTcProvider() {
>>         return providerList.first();
>>     }
>>
>> I guess the following like in BaseTdbTcProvider.executeSparqlQuery() is
>> the culprit:
>>
>>        getDataset().setDefaultModel(null);
>>
>> Stacktrace:
>>
>> java.lang.NullPointerException
>>     at
>> com.hp.hpl.jena.sparql.core.DatasetImpl.addToCache(DatasetImpl.java:259)
>>     at
>> com.hp.hpl.jena.sparql.core.DatasetImpl.setDefaultModel(DatasetImpl.java:214)
>>     at
>> org.apache.clerezza.rdf.jena.tdb.storage.BaseTdbTcProvider.executeSparqlQuery(BaseTdbTcProvider.java:39)
>>     at
>> org.apache.clerezza.rdf.jena.tdb.storage.ScalableSingleTdbDatasetTcProvider.executeSparqlQuery(ScalableSingleTdbDatasetTcProvider.java:81)
>>     at
>> org.apache.clerezza.rdf.core.access.TcManager.executeSparqlQuery(TcManager.java:310)
>>     at
>> org.apache.clerezza.rdf.core.access.TcManager.executeSparqlQuery(TcManager.java:282)
>>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
>> Method)[:1.7.0_17]
>>     at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)[:1.7.0_17]
>>     at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.7.0_17]
>>     at java.lang.reflect.Method.invoke(Method.java:601)[:1.7.0_17]
>>     at
>> org.apache.aries.proxy.impl.ProxyHandler$1.invoke(ProxyHandler.java:54)[12:org.apache.aries.proxy.impl:1.0.0]
>>     at
>> org.apache.aries.proxy.impl.ProxyHandler.invoke(ProxyHandler.java:119)[12:org.apache.aries.proxy.impl:1.0.0]
>>     at
>> org.apache.clerezza.rdf.core.access.$TcManager10360330.executeSparqlQuery(Unknown
>> Source)[181:org.apache.clerezza.rdf.core:0.13.0.SNAPSHOT]
>>     at
>> nl.overheid.stelsel.digimelding.astore.storage.clerezza.ClerezzaStorageProvider.query(ClerezzaStorageProvider.java:250)[209:astore-storage-clerezza:0.7.0.SNAPSHOT]
>>
>
>
> --
> ir. ing. Minto van der Sluis
> Software innovator / renovator
> Xup BV
>
> Mobiel: +31 (0) 626 014541
>

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