You do not need to use the loader; if you do the input must be N-Quads
if you pass in an InputStream. At a guess, and we can't see the data,
the app tried to read JSON-LD.
Use RDFDataMgr.read.
dataset.begin(ReadWrite.WRITE);
try {
RDFDataMgr.read(dataset,
"/Users/izharullah/workspace/MyTDB/Soil1A.jsonld") ;
dataset.commit();
} finally { dataset.end(); }
Or
Txn.executeWrite(dataset, ()->
RDFDataMgr.read(dataset,
"/Users/izharullah/workspace/MyTDB/Soil1A.jsonld") ;
);
Andy
On 26/01/17 07:54, Lorenz B. wrote:
Hello Izhar,
from the error messages I guess that the data is invalid:
[line: 2, col: 10] Expected BNode or IRI: Got:
[STRING2:56e1613a0dd8e408f1ca4d9d]
You can check line 2 or post here at least the beginning of the file
(~10 lines or something) that you load into TDB.
Lorenz
Hi,
I just started learning Jena programming and have very little acquaintance with
its APIs. I ran the following code using TDB and a SPARQL query just to test it
but I got some errors after running the program. Here is the code:
public class TDBexample2 {
public static void main(String[] args) {
FileManager fm = FileManager.get();
fm.addLocatorClassLoader(TDBexample2.class.getClassLoader());
InputStream in =
fm.open("/Users/izharullah/workspace/MyTDB/Soil1A.jsonld");
Location location = Location.create
("/Users/izharullah/workspace/MyTDB");
// Load some initial data
TDBLoader.load(TDBInternal.getBaseDatasetGraphTDB(TDBFactory.createDatasetGraph(location)),
in, false);
String queryString =
"SELECT (COUNT(*) AS ?count) { " +
" ?s ?p ?o . " +
"}" ;
Dataset dataset = TDBFactory.createDataset(location);
dataset.begin(ReadWrite.READ);
try {
Query query = QueryFactory.create(queryString);
QueryExecution qexec = QueryExecutionFactory.create(query, dataset);
try {
ResultSet results = qexec.execSelect();
while ( results.hasNext() ) {
QuerySolution soln = results.nextSolution();
Literal count = soln.getLiteral("count");
System.out.println(count);
}
} finally {
qexec.close();
}
} finally {
dataset.end();
}
}
}
I got some unexpected errors, here is the snapshot:
Exception in thread "main" org.apache.jena.riot.RiotException: [line: 2, col:
10] Expected BNode or IRI: Got: [STRING2:56e1613a0dd8e408f1ca4d9d]
at
org.apache.jena.riot.system.ErrorHandlerFactory$ErrorHandlerStd.fatal(ErrorHandlerFactory.java:136)
at org.apache.jena.riot.lang.LangEngine.raiseException(LangEngine.java:165)
at org.apache.jena.riot.lang.LangEngine.exceptionDirect(LangEngine.java:158)
at org.apache.jena.riot.lang.LangEngine.exception(LangEngine.java:151)
at org.apache.jena.riot.lang.LangNTuple.checkIRIOrBNode(LangNTuple.java:90)
at org.apache.jena.riot.lang.LangNQuads.parseOne(LangNQuads.java:86)
at org.apache.jena.riot.lang.LangNQuads.runParser(LangNQuads.java:54)
at org.apache.jena.riot.lang.LangBase.parse(LangBase.java:42)
at
org.apache.jena.riot.RDFParserRegistry$ReaderRIOTLang.read(RDFParserRegistry.java:178)
at org.apache.jena.riot.RDFDataMgr.process(RDFDataMgr.java:859)
at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:698)
at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:677)
at
org.apache.jena.tdb.store.bulkloader.BulkLoader.loadQuads$(BulkLoader.java:152)
at
org.apache.jena.tdb.store.bulkloader.BulkLoader.loadDataset(BulkLoader.java:115)
at org.apache.jena.tdb.TDBLoader.loadDataset$(TDBLoader.java:265)
at org.apache.jena.tdb.TDBLoader.loadDataset(TDBLoader.java:200)
at org.apache.jena.tdb.TDBLoader.load(TDBLoader.java:85)
at TDBexample2.main(TDBexample2.java:28)
Can someone help me what is the problem with the code?
Many thanks in advance.
Best regards,
Izhar
