/*
* (c) Copyright 2006, 2007, 2008, 2009 Hewlett-Packard Development Company, LP
* All rights reserved.
* [See end of file]
*/
package arq.examples.larq;
import org.openjena.atlas.lib.StrUtils ;
import com.hp.hpl.jena.query.ARQ ;
import com.hp.hpl.jena.query.larq.IndexBuilderSubject ;
import com.hp.hpl.jena.query.larq.IndexLARQ ;
import com.hp.hpl.jena.rdf.model.Model ;
import com.hp.hpl.jena.rdf.model.ModelFactory ;
import com.hp.hpl.jena.sparql.util.Utils ;
import com.hp.hpl.jena.util.FileManager ;
import com.hp.hpl.jena.vocabulary.DC ;
/** Example code to load a model from a file, index subjects by DC title property,
* then execute a SPARQL query with a Lucene search in it. */
public class ExLucene4
{
public static void main(String[] a) throws Exception
{
System.out.println("ARQ Example: "+Utils.classShortName(ExLucene4.class)) ;
System.out.println("ARQ: "+ARQ.VERSION) ;
System.out.println() ;
Model model = ModelFactory.createDefaultModel() ;
IndexLARQ index = buildSubjectTitleIndex(model, "testing/LARQ/data-1.ttl") ;
// Search for string
String searchString = "+document" ;
// This time, find documents with a matching DC title.
String queryString = StrUtils.strjoin("\n",
"PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>" ,
"PREFIX : <http://example/>" ,
"PREFIX pf: <http://jena.hpl.hp.com/ARQ/property#>",
"PREFIX dc: <http://purl.org/dc/elements/1.1/>",
"SELECT ?doc {" ,
" ?doc pf:textMatch '"+searchString+"'.",
"}") ;
// Two of three docuemnts should match.
ExLucene1.performQuery(model, index, queryString) ;
index.close() ;
}
static IndexLARQ buildSubjectTitleIndex(Model model, String datafile)
{
// ---- Read and index just the title strings.
IndexBuilderSubject larqBuilder = new IndexBuilderSubject(DC.title) ;
// Index statements as they are added to the model.
model.register(larqBuilder) ;
// To just build the index, create a model that does not store statements
// Model model2 = ModelFactory.createModelForGraph(new GraphSink()) ;
FileManager.get().readModel(model, datafile) ;
// ---- Alternatively build the index after the model has been created.
// larqBuilder.indexStatements(model.listStatements()) ;
// ---- Finish indexing
larqBuilder.closeWriter() ;
model.unregister(larqBuilder) ;
// ---- Create the access index
IndexLARQ index = larqBuilder.getIndex() ;
return index ;
}
}
/*
* (c) Copyright 2006, 2007, 2008, 2009 Hewlett-Packard Development Company, LP
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/