AGLoadWithPredicateMapping.java

package com.franz.agbase.examples;

import com.franz.agbase.*;


public class AGLoadWithPredicateMapping {

    /**
     * Demonstrates loading a triple store with predicate mappings defined.
     * 
     * @param 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("datamapping", AGPaths.TRIPLE_STORES);

        // Add 3 predicate mappings for the temporal predicates so that their
        // values are loaded as date-time UPI's, enabling more efficient storage
        // and range querying over dates.
        String[] map = new String[9];
        map[0] = "http://franz.com/ns/allegrograph/3.0/temporal/time";
        map[1] = "date-time";
        map[2] = "predicate";
        map[3] = "http://franz.com/ns/allegrograph/3.0/temporal/starttime";
        map[4] = "date-time";
        map[5] = "predicate";
        map[6] = "http://franz.com/ns/allegrograph/3.0/temporal/endtime";
        map[7] = "date-time";
        map[8] = "predicate";
        ts.addDataMapping(map);
        
        // Load some temporal data
        AGLoadNtriples.loadNTriplesWithTiming(ts, AGPaths.dataSources("temporal.nt"));

        // Index the store for faster querying
        AGIndexAllTriples.indexAllTriplesWithTiming(ts);
        
        // Register any namespaces
        ts.registerNamespace("ex", "http://example.org/");
        ts.registerNamespace("t", "http://franz.com/ns/allegrograph/3.0/temporal/");

        TriplesIterator cc = ts.getStatements(null, "!t:starttime", null);
        AGUtils.showTriples(cc);
        
        // Close the triple store and disconnect from the server.
        ts.closeTripleStore();
        ags.disable();
    }

}

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