Hello,
I would like to update the data I browse using Longwell. Creating a new
repository each time some piece of information changes is not very
satisfying but it is the only way I found reading the documentation and the
archive of this maling list.
It should be possible to use Sesame to work with the repository directly,
shouldn't it? From Longwell sources I found out that the Sesame NativeStore
is used. I managed to open it using Sesame 2 beta 3 (does Longwell 2.4 use
Sesame 2 alpha 3? (I use Longwell 2.4, because Longwell 2.4.2 won't build))
but I get an ArrayIndexOutOfBoundsException on result.next() already when
trying to list the triples.
-- The exception is: --
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at org.openrdf.sail.nativerdf.ValueStore._data2value(ValueStore.java
:537)
at org.openrdf.sail.nativerdf.ValueStore.getValue(ValueStore.java
:200)
at org.openrdf.sail.nativerdf.ValueStore._data2literal(
ValueStore.java:574)
at org.openrdf.sail.nativerdf.ValueStore._data2value(ValueStore.java
:543)
at org.openrdf.sail.nativerdf.ValueStore.getValue(ValueStore.java
:200)
at org.openrdf.sail.nativerdf.NativeStatementIterator.next(
NativeStatementIterator.java:101)
at org.openrdf.sail.nativerdf.NativeStatementIterator.next(
NativeStatementIterator.java:24)
at info.aduna.iteration.ExceptionConvertingIteration.next(
ExceptionConvertingIteration.java:86)
at info.aduna.iteration.IterationWrapper.next(IterationWrapper.java
:71)
at org.openrdf.sail.helpers.SailBaseIteration.next(
SailBaseIteration.java:57)
at info.aduna.iteration.ExceptionConvertingIteration.next(
ExceptionConvertingIteration.java:86)
at info.aduna.iteration.IterationWrapper.next(IterationWrapper.java
:71)
at doapfeedreader.RepoTest.printAll2(RepoTest.java:70)
-- The code is: --
RepositoryConnection con = repo.getConnection();
RepositoryResult result = con.getStatements(null, null, null, true);
while (result.hasNext()) {
Statement s = (Statement)result.next(); //Line # 70
System.out.println(s.getSubject()+" "+s.getPredicate()+"
"+s.getObject());
}
-----------------
The exception is thrown on results.next() or already result.hasNext()
according to whether I do result = con.getStatements(null, null, null, true)
or result = con.getStatements(null, null, null, true, (Resource)null).
It doesn't list any of the triples I've added to the repository using
./longwell -r .... it only lists these:
http://simile.mit.edu/2005/04/longwell#Trusted
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://simile.mit.edu/2005/04/longwell#SystemStatus
http://simile.mit.edu/2005/04/longwell#SystemStatus
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/2000/01/rdf-schema#Class
http://simile.mit.edu/2005/04/longwell#Property
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/2000/01/rdf-schema#Class
http://simile.mit.edu/2005/04/longwell#DateTimeProperty
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/2000/01/rdf-schema#Class
http://simile.mit.edu/2005/04/longwell#TagProperty
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/2000/01/rdf-schema#Class
http://simile.mit.edu/2005/04/flair#Facade
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/2000/01/rdf-schema#Class
http://simile.mit.edu/2005/04/flair#QueryBasedFacade
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/2000/01/rdf-schema#Class
What do I do wrong? Is this a Sesame 2 beta 3 bug? Does Longwell use Sesame
2? (I don't know Maven so I'm not sure). Is there some other way to update
the repository?
Thank you in advance.
Jakub Kotowski
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