/*
* (c) Copyright 2006, 2007, 2008, 2009 Hewlett-Packard Development Company, LP
* All rights reserved.
* [See end of file]
*/
package arq.examples.larq;
import java.io.StringReader ;
import org.openjena.atlas.lib.StrUtils ;
import com.hp.hpl.jena.query.ARQ ;
import com.hp.hpl.jena.query.larq.IndexBuilderNode ;
import com.hp.hpl.jena.query.larq.IndexLARQ ;
import com.hp.hpl.jena.rdf.model.Literal ;
import com.hp.hpl.jena.rdf.model.Model ;
import com.hp.hpl.jena.rdf.model.ModelFactory ;
import com.hp.hpl.jena.rdf.model.Resource ;
import com.hp.hpl.jena.rdf.model.ResourceFactory ;
import com.hp.hpl.jena.sparql.util.Utils ;
/** Example code to index subjects by some external content.
* Pattern 3. */
public class ExLucene5
{
public static void main(String[] a) throws Exception
{
System.out.println("ARQ Example: "+Utils.classShortName(ExLucene5.class)) ;
System.out.println("ARQ: "+ARQ.VERSION) ;
System.out.println() ;
Model model = ModelFactory.createDefaultModel() ;
IndexLARQ index = buildIndexExternalContent(model) ;
// Search for string
String searchString = "+document" ;
// This time, find documents with a matching DC title.
String queryString = StrUtils.strjoin("\n",
"PREFIX pf: <http://jena.hpl.hp.com/ARQ/property#>",
"SELECT ?doc {" ,
" ?doc pf:textMatch '"+searchString+"'.",
"}") ;
// Two of three docuemnts should match.
ExLucene1.performQuery(model, index, queryString) ;
index.close() ;
}
static IndexLARQ buildIndexExternalContent(Model model)
{
// ---- Create index builder
IndexBuilderNode larqBuilder = new IndexBuilderNode() ;
Resource r1 = ResourceFactory.createResource("http://example/r1") ;
Resource r2 = ResourceFactory.createResource("http://example/r2") ;
Resource r3 = ResourceFactory.createResource("http://example/r3") ;
Resource r4 = ResourceFactory.createResource("http://example/r4") ;
Literal lit1 = ResourceFactory.createPlainLiteral("doc") ;
// ---- Index based on some external content. Teh content can be any string of words.
larqBuilder.index(r1, new StringReader("document")) ; // Just to show a Stringreader is possible
larqBuilder.index(r2, "document") ;
larqBuilder.index(r3, "slideshow") ;
larqBuilder.index(r4, "codebase") ;
larqBuilder.index(lit1, "document") ;
// Note that the model is untouched - the index exists outside of any model statements.
// The application is responsible for keeping
// ----
larqBuilder.closeWriter() ;
IndexLARQ index = larqBuilder.getIndex() ;
// NodeIterator iter = index.searchModelByIndex(model, "document") ;
// for ( ; iter.hasNext() ; )
// System.out.println("Found: "+FmtUtils.stringForRDFNode((RDFNode)iter.next())) ;
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.
*/