selecting the VCARD resources in apache jena - Java Big Data

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Description

selecting the VCARD resources in apache jena

Demo Code

/*//from  www.  j  av a2  s.c o 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
 * limitations under the License.
 */

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

import java.io.*;

/** Tutorial 7 - selecting the VCARD resources
 */
public class Tutorial07 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 FileManager 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(in, "");

        StmtIterator iter = model.listStatements(new SimpleSelector(null,
                VCARD.FN, (RDFNode) null) {
            public boolean selects(Statement s) {
                return s.getString().endsWith("Smith");
            }
        });

        ////         select all the resources with a VCARD.FN property
        ////        ResIterator iter = model.listResourcesWithProperty(VCARD.FN);
        if (iter.hasNext()) {
            System.out.println("The database contains vcards for:");
            while (iter.hasNext()) {
                System.out.println("  " + iter.nextStatement().getString());
            }
        } else {
            System.out.println("No vcards were found in the database");
        }
    }
}

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