AGAddStatements.java

package com.franz.agbase.examples;

import com.franz.agbase.*;

public class AGAddStatements {

    /**
     * Demonstrates some basics of adding triples over a socket.
     * 
     * @param args unused
     * @throws AllegroGraphException 
     */
    public static void main(String[] args) throws AllegroGraphException {
        // Connect to server, which must already be running.
        AllegroGraphConnection ags = new AllegroGraphConnection();
        try {
            ags.enable();
        } catch (Exception e) {
            throw new AllegroGraphException("Server connection problem", e);
        }
        // Create a fresh triple-store for this example.
        AllegroGraph ts = ags.renew("addstatements", AGPaths.TRIPLE_STORES);
        
        // Add a single triple to the store
        ts.addStatement("<http://example.org/Dog>",  
                "<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>",  
                "<http://www.w3.org/2002/07/owl#Class>"); 

        // For bulk loading over a socket, it is more efficient to buffer 
        // the operation by grouping the triple components into arrays. 
        // The following statement creates 4 triples from corresponding 
        // elements of the arrays.
        ts.addStatements(  
        new String[]{  
            "<http://example.org/Cat>",  
            "<http://example.org/Dog>",  
            "<http://example.org/Giraffe>",  
            "<http://example.org/Lion>" },  
        new String[]{  
            "<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>",  
            "<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>",  
            "<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>",  
            "<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>" },  
        new String[]{  
            "<http://www.w3.org/2002/07/owl#Class>",  
            "<http://www.w3.org/2002/07/owl#Class>",  
            "<http://www.w3.org/2002/07/owl#Class>",  
            "<http://www.w3.org/2002/07/owl#Class>" }  
        );                             

        // When an array consists of identical elements, it can be 
        // shortened to a single element. The following statement 
        // creates 4 triples where the predicate and object 
        // components are identical.
        ts.addStatements(  
            new String[]{  
                "<http://example.org/Cat>",  
                "<http://example.org/Dog>",  
                "<http://example.org/Giraffe>",  
                "<http://example.org/Lion>" },  
            new String[]{"<http://www.w3.org/2000/01/rdf-schema#subClassOf>"},  
            new String[]{"<http://example.org/Mammal>"}  
        ); 
        
        System.out.println("Added " + ts.numberOfTriples() + " triples to the store.");
        
        // Close the store and disconnect from the server.
        ts.closeTripleStore();
        ags.disable();
    }
}

Up | Next

Copyright © 2014 Franz Inc., All Rights Reserved | Privacy Statement
Delicious Google Buzz Twitter Google+