Statement attribute accessor methods in apache jena - Java Big Data

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Description

Statement attribute accessor methods in apache jena

Demo Code

/*/*from   w  w w .  j av a  2  s  . co  m*/
 * 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
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 */

import org.apache.jena.rdf.model.*;
import org.apache.jena.vocabulary.*;

/** Tutorial 3 Statement attribute accessor methods
 */
public class Tutorial03 extends Object {
    public static void main(String args[]) {

        // some definitions
        String personURI = "http://somewhere/JohnSmith";
        String givenName = "John";
        String familyName = "Smith";
        String fullName = givenName + " " + familyName;
        // create an empty model
        Model model = ModelFactory.createDefaultModel();

        // create the resource
        //   and add the properties cascading style
        Resource johnSmith = model
                .createResource(personURI)
                .addProperty(VCARD.FN, fullName)
                .addProperty(
                        VCARD.N,
                        model.createResource()
                                .addProperty(VCARD.Given, givenName)
                                .addProperty(VCARD.Family, familyName));

        // list the statements in the graph
        StmtIterator iter = model.listStatements();

        // print out the predicate, subject and object of each statement
        while (iter.hasNext()) {
            Statement stmt = iter.nextStatement(); // get next statement
            Resource subject = stmt.getSubject(); // get the subject
            Property predicate = stmt.getPredicate(); // get the predicate
            RDFNode object = stmt.getObject(); // get the object

            System.out.print(subject.toString());
            System.out.print(" " + predicate.toString() + " ");
            if (object instanceof Resource) {
                System.out.print(object.toString());
            } else {
                // object is a literal
                System.out.print(" \"" + object.toString() + "\"");
            }
            System.out.println(" .");
        }
    }
}

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