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Java > Open Source Codes > jena > examples > rdql > rdql_code1


1 /*
2  * (c) Copyright 2002, 2003 Hewlett-Packard Development Company, LP
3  * [See end of file]
4  */
5 package jena.examples.rdql ;
6
7 import com.hp.hpl.jena.rdf.model.* ;
8 import com.hp.hpl.jena.rdql.* ;
9
10 import java.util.* ;
11 import java.io.* ;
12
13 public class rdql_code1
14 {
15     static public void main(String JavaDoc[] argv)
16     {
17         try {
18             Model model = ModelFactory.createDefaultModel() ;
19             model.read(new FileInputStream("vc-db-1.rdf"),
20                        "http://nowhere/",
21                        "RDF/XML") ;
22
23             String JavaDoc queryString = "SELECT ?x, ?fname "+
24             "WHERE (?x, <http://www.w3.org/2001/vcard-rdf/3.0#FN>, ?fname)" ;
25
26             Query query = new Query(queryString) ;
27             query.setSource(model);
28             QueryExecution qe = new QueryEngine(query) ;
29
30             QueryResults results = qe.exec() ;
31             for ( Iterator iter = results ; iter.hasNext() ; )
32             {
33                 ResultBinding res = (ResultBinding)iter.next() ;
34                 Object JavaDoc x = res.get("x") ;
35                 Object JavaDoc fname = res.get("fname") ;
36                 System.out.println("x = "+x+" fname = "+fname) ;
37             }
38             results.close() ;
39             
40         } catch (Exception JavaDoc ex)
41         {
42             System.err.println("Exception: "+ex) ;
43             ex.printStackTrace(System.err) ;
44         }
45     }
46 }
47
48 /*
49  * (c) Copyright 2002, 2003 Hewlett-Packard Development Company, LP
50  * All rights reserved.
51  *
52  * Redistribution and use in source and binary forms, with or without
53  * modification, are permitted provided that the following conditions
54  * are met:
55  * 1. Redistributions of source code must retain the above copyright
56  * notice, this list of conditions and the following disclaimer.
57  * 2. Redistributions in binary form must reproduce the above copyright
58  * notice, this list of conditions and the following disclaimer in the
59  * documentation and/or other materials provided with the distribution.
60  * 3. The name of the author may not be used to endorse or promote products
61  * derived from this software without specific prior written permission.
62  *
63  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
64  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
65  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
66  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
67  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
68  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
69  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
70  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
71  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
72  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
73  */
74
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