Thanks Bruno! I did find the example Java code in Git and literally like 2 minutes ago managed to get this working. I still don't *entirely* understand every aspect of how this works, but it's slowly starting to make sense.
I'm going to play with it some more, and maybe I can write up some docs on this and contribute to the Jena documentation. Cheers, Phil This message optimized for indexing by NSA PRISM On Mon, Oct 6, 2014 at 11:08 PM, Bruno P. Kinoshita <brunodepau...@yahoo.com.br> wrote: > Hello Phillip > I haven't used Jena-Text before, but at a customer we are deploying Jena and > a Hadoop cluster that comes with a Solr server, and I have been wanting to > learn how to use jena-text to see if that'll be useful in our project. > It took me some time to find out what was different in your example, from the > one provided in jena-text. This gist [1] has my Java code ported from reading > your example. > Take a look at line 77, instead of using the dataset with lucene support, > you're using a model with a reasoner, and my guess (which might be a long > shot) is that this model is resolving your query to true to every entry, due > to it not recognizing the text:query () part. > Regarding the link, it is broken due to the migration from SVN to git, that > happened days ago. It has already been reported in JENA-786 [2], I already > ran the W3C link checker tool [3] with recursion=20 to get some 404 errors, > and will see if I can write a simple patch that fixes some of them. > Oh, take a look at QueryExecUtils#executeQuery(...), it's handy for quickly > testing queries and printing the output. > Hope that helps,Bruno > [1] https://gist.github.com/kinow/10875c79a94f4fd931c9 > [2] > https://issues.apache.org/jira/browse/JENA-786?jql=project%20%3D%20JENA%20AND%20updated%3E%3D-1w%20ORDER%20BY%20updated%20DESC > > [3] http://validator.w3.org/checklink > > From: Phillip Rhodes <motley.crue....@gmail.com> > To: dev@jena.apache.org > Sent: Monday, October 6, 2014 9:51 PM > Subject: Jena Text returning bogus results? > > Jena gang: > > I'm trying to use the Jena-Text stuff to do text searches in SPARQL > and am running into a problem. I am indexing two triples, with an > rdfs:label property, then doing a search using text:query that should > match 0 triples. But I still get back two results when I run my query > (the two triples I previously indexed, even though they don't contain > the query string). > > I'm sure I'm probably just doing something wrong, but so far I'm > having no luck figuring out what it is. If somebody could look at > this code and give me a pointer, it would be much appreciated. > > > class JenaTextMain1 > { > > static main(args) > { > > // Base dataset > Dataset dataset = TDBFactory.createDataset("jenastore"); > > EntityDefinition entDef = new EntityDefinition("uri", "text", > RDFS.label) ; > > // Lucene, in memory. > Directory dir = new RAMDirectory(); > > // Join together into a dataset > Dataset ds = TextDatasetFactory.createLucene(dataset, dir, entDef); > > ds.begin(ReadWrite.WRITE); > > Model m = ds.defaultModel; > > Resource rSubject = m.createResource( > "http://ontology.fogbeam.com/example/TestResource1"; ); > Resource rSubject2 = m.createResource( > "http://ontology.fogbeam.com/example/TestResource2"; ); > > try > { > > Statement s = m.createStatement(rSubject, RDFS.label, > "This is a TEST Resource" ); > > m.add( s ); > > Statement s2 = m.createStatement(rSubject2, RDFS.label, > "Bratwurst" ); > > m.add( s2 ); > > ds.commit(); > > > String baseQueryString = > "PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> " + > "PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> " + > "PREFIX dc: <http://purl.org/dc/elements/1.1/> " + > "PREFIX dcterm: <http://purl.org/dc/terms/> " + > "PREFIX owl: <http://www.w3.org/2002/07/owl#> " + > "PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> " + > "PREFIX text: <http://jena.apache.org/text#>"; > > /* Do a SPARQL query using Jena-Text here... */ > String queryString = baseQueryString + "SELECT ?s { ?s > text:query ('Flibble') ; rdfs:label ?label ; }"; > > ds.begin(ReadWrite.READ); > > Query query = QueryFactory.create(queryString) ; > > Reasoner reasoner = ReasonerRegistry.getOWLMiniReasoner(); > InfModel inf = ModelFactory.createInfModel(reasoner, m); > > QueryExecution qexec = QueryExecutionFactory.create(query, inf); > > > try > { > ResultSet solutions = qexec.execSelect(); > for ( ; solutions.hasNext() ; ) > { > QuerySolution soln = solutions.nextSolution(); > println "solution: ${soln}"; > Iterator iter = soln.varNames(); > } > > ds.commit(); > > } > finally > { > qexec.close(); > } > } > finally > { > if( ds != null ) > { > ds.end(); > } > } > > println "done"; > } > > } > > > Running this results in this output: > > solution: ( ?s = <http://ontology.fogbeam.com/example/TestResource1> ) > solution: ( ?s = <http://ontology.fogbeam.com/example/TestResource2> ) > done > > > Any and all help is greatly appreciated. > > Also, on a related note... the page here: > > https://jena.apache.org/documentation/query/text-query.html > > has the following link listed as "example code here" but the link is > no longer valid. > > https://svn.apache.org/repos/asf/jena/trunk/jena-text/src/main/java/examples/ > > > Thanks, > > > Phil > > This message optimized for indexing by NSA PRISM > > >
