/**
* File: $HeadURL: https://hdt-java.googlecode.com/svn/trunk/hdt-java/examples/org/rdfhdt/hdt/examples/ExampleSearch.java $
* Revision: $Rev: 191 $
* Last modified: $Date: 2013-03-03 11:41:43 +0000 (dom, 03 mar 2013) $
* Last modified by: $Author: mario.arias $
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Contacting the authors:
* Mario Arias: mario.arias@deri.org
* Javier D. Fernandez: jfergar@infor.uva.es
* Miguel A. Martinez-Prieto: migumar2@infor.uva.es
* Alejandro Andres: fuzzy.alej@gmail.com
*/
package org.rdfhdt.hdt.examples;
import java.util.Iterator;
import org.rdfhdt.hdt.hdt.HDT;
import org.rdfhdt.hdt.hdt.HDTManager;
import org.rdfhdt.hdt.triples.IteratorTripleString;
import org.rdfhdt.hdt.triples.TripleString;
/**
* @author mario.arias
*
*/
public class ExampleSearch {
public static void main(String[] args) throws Exception {
// Load HDT file NOTE: Use loadIndexedHDT() if you are doing ?P?, ?PO, ??O queries
HDT hdt = HDTManager.loadHDT("data/example.hdt", null);
// Use mapHDT/mapIndexedHDT to save memory.
// It will load the parts on demand (possibly slower querying).
// HDT hdt = HDTManager.mapHDT("data/example.hdt", null);
// Enumerate all triples. Empty string means "any"
IteratorTripleString it = hdt.search("", "", "");
System.out.println("Estimated number of results: "+it.estimatedNumResults());
while(it.hasNext()) {
TripleString ts = it.next();
System.out.println(ts);
}
// List all predicates
System.out.println("Dataset contains "+hdt.getDictionary().getNpredicates()+" predicates:");
Iterator<? extends CharSequence> itPred = hdt.getDictionary().getPredicates().getSortedEntries();
while(itPred.hasNext()) {
CharSequence str = itPred.next();
System.out.println(str);
}
}
}