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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jena.examples.rdf ;
import org.apache.jena.rdf.model.*;
import org.apache.jena.util.FileManager;
import org.apache.jena.vocabulary.*;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
/** Tutorial 10 - demonstrate a container
*/
public class Tutorial10 extends Object {
static final String inputFileName = "vc-db-1.rdf";
public static void main (String args[]) {
// create an empty model
Model model = ModelFactory.createDefaultModel();
// use the class loader to find the input file
InputStream in = FileManager.get().open( inputFileName );
if (in == null) {
throw new IllegalArgumentException( "File: " + inputFileName + " not found");
}
// read the RDF/XML file
model.read(new InputStreamReader(in), "");
// create a bag
Bag smiths = model.createBag();
// select all the resources with a VCARD.FN property
// whose value ends with "Smith"
StmtIterator iter = model.listStatements(
new
SimpleSelector(null, VCARD.FN, (RDFNode) null) {
@Override
public boolean selects(Statement s) {
return s.getString().endsWith("Smith");
}
});
// add the Smith's to the bag
while (iter.hasNext()) {
smiths.add( iter.nextStatement().getSubject());
}
// print the graph as RDF/XML
model.write(new PrintWriter(System.out));
System.out.println();
// print out the members of the bag
NodeIterator iter2 = smiths.iterator();
if (iter2.hasNext()) {
System.out.println("The bag contains:");
while (iter2.hasNext()) {
System.out.println(" " +
((Resource) iter2.next())
.getRequiredProperty(VCARD.FN)
.getString());
}
} else {
System.out.println("The bag is empty");
}
}
}