AGReasoningSubClassOf.java

package com.franz.agbase.examples;

import com.franz.agbase.*;

public class AGReasoningSubClassOf {

    /**
     * Demonstrates basic reasoning involving rdfs:subClassOf
     * 
     * @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 fresh triple-store for this example.
        AllegroGraph ts = ags.renew("subclassof", AGPaths.TRIPLE_STORES);
        
        // Register your namespaces
        ts.registerNamespace("ex","http://example.org/");
        
        // Add some triples to the store
        ts.addStatement("!ex:A","!rdfs:subClassOf", "!ex:B");
        ts.addStatement("!ex:B","!rdfs:subClassOf", "!ex:C");
        ts.addStatement("!ex:a","!rdf:type", "!ex:A");
        
        // Retrieve some triples without reasoning 
        TriplesIterator cc = ts.getStatements(false,"!ex:A","!rdfs:subClassOf",null);
        System.out.println("Superclasses of ex:A in the store:");
        AGUtils.showTriples(cc);

        // Now with reasoning
        cc = ts.getStatements(true,"!ex:A","!rdfs:subClassOf",null);
        System.out.println("Superclasses of ex:A inferred:");
        AGUtils.showTriples(cc);

        // Confirm that an instance of type ex:A is an instance of its superclasses
        cc = ts.getStatements(true,"!ex:a","!rdf:type",null);
        System.out.println("Types of ex:a inferred:");
        AGUtils.showTriples(cc);

        // Close the store and disconnect from the server
        ts.closeTripleStore();
        ags.disable();
    }

}

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