Success! Now it’s working – I had to remove the trailing slash from http://ao.com/name/
Thanks, Andy! That was helpful! S. On 4/7/17, 2:19 PM, "Andy Seaborne" <[email protected]> wrote: Do you have a complete, self-contained, minimal example? Andy On 07/04/17 22:15, Dimov, Stefan wrote: > Ooops, correction: > > public static Dataset loadData() { > Dataset ds = DatasetFactory.createTxnMem(); > Dataset indexDS = createIndex(ds); > FileUtil.loadDataGraphs(indexDS, dataGraphs); > return indexDS; > } > > public static Dataset createIndex(Dataset ds) { > Resource res = ResourceFactory.createProperty("http://ao.com/name/";); > EntityDefinition entDef = new EntityDefinition("uri", "text", res) ; > Directory dir = new RAMDirectory(); > Dataset indexDataset = TextDatasetFactory.createLucene(ds, dir, entDef, null); > return indexDataset; > } > > > On 4/7/17, 2:12 PM, "Dimov, Stefan" <[email protected]> wrote: > > Thanks Andy, > > I’ve changed the code: > > public static Dataset loadData() { > Dataset ds = DatasetFactory.createTxnMem(); > Dataset indexDS = createIndex(ds); > FileUtil.loadDataGraphs(indexDS, dataGraphs); > return ds; > } > > public static Dataset createIndex(Dataset ds) { > Resource res = ResourceFactory.createProperty("http://ao.com/name/";); > EntityDefinition entDef = new EntityDefinition("uri", "text", res) ; > Directory dir = new RAMDirectory(); > Dataset indexDataset = TextDatasetFactory.createLucene(ds, dir, entDef, null); > return indexDataset; > } > > but after that, still text query returns empty result set. > > What am I missing? > > S. > > > On 4/7/17, 1:48 PM, "Andy Seaborne" <[email protected]> wrote: > > > Dataset ds = loadData(); > ^^^^^^^^^^ > Not shown. > > > … > > Resource res = ResourceFactory.createProperty("http://ao.com/name/";); > > EntityDefinition entDef = new EntityDefinition("uri", "text", res) ; > > Directory dir = new RAMDirectory(); > > Dataset indexDataset = TextDatasetFactory.createLucene(ds, dir, entDef, null); > > > Stefan, > > You have to load the data through "indexDataset" - I guess you are > loading it into a plain dataset in loadData. > > The Lucene index is built as data is added to the dataset, not when the > dataset is wrapper later. > > Andy > > > On 07/04/17 19:40, Dimov, Stefan wrote: > > Thanks Rob, > > > > The problem is, for someone like me, who is new in Jena, it’s hard to follow the documentation – not enough examples and the explanations are kind of ambiguous (again – from my point of view). > > > > I was hoping on comment and snippet, specifically about my example. > > > > > > S. > > > > > > > > On 4/7/17, 2:25 AM, "Rob Vesse" <[email protected]> wrote: > > > > What these lines are doing is creating a blank index, in particular the last line simply associates a pre-existing index with a dataset i.e. It doesn’t actually cause indexing to happen, typically you would first build a persistent Lucene index using the command line tool > > > > http://jena.apache.org/documentation/query/text-query.html#building-a-text-index > > > > if you want to explicitly built the index from code your best bet is to refer to the code for the commandline tool: > > > > https://github.com/apache/jena/blob/master/jena-text/src/main/java/jena/textindexer.java > > > > Rob > > > > On 07/04/2017 04:07, "Dimov, Stefan" <[email protected]> wrote: > > > > Resource res = ResourceFactory.createProperty("http://ao.com/name/";); > > EntityDefinition entDef = new EntityDefinition("uri", "text", res) ; > > Directory dir = new RAMDirectory(); > > Dataset indexDataset = TextDatasetFactory.createLucene(ds, dir, entDef, null); > > > > > > > > > > > > > > > >
