AGReasoningSubPropertyOf.java

package com.franz.agbase.examples;

import com.franz.agbase.*;

public class AGReasoningSubPropertyOf {

    /**
     * Demonstrates basic reasoning involving rdfs:subPropertyOf
     * 
     * @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("subpropertyof", AGPaths.TRIPLE_STORES);
        
        // Register your namespaces
        ts.registerNamespace("ex","http://example.org/");
        
        // Add some triples to the store
        ts.addStatement("!ex:p","!rdfs:subPropertyOf", "!ex:q");
        ts.addStatement("!ex:q","!rdfs:subPropertyOf", "!ex:r");
        ts.addStatement("!ex:a","!ex:p", "!ex:b");
        
        // Retrieve some triples without reasoning 
        TriplesIterator cc = ts.getStatements(false,"!ex:p","!rdfs:subPropertyOf",null);
        System.out.println("Retrieving super-properties of ex:p");
        AGUtils.showTriples(cc);

        // Now with reasoning
        cc = ts.getStatements(true,"!ex:p","!rdfs:subPropertyOf",null);
        System.out.println("Inferring super-properties of ex:p");
        AGUtils.showTriples(cc);

        // Retrieve without reasoning properties that hold between ex:a and ex:b
        cc = ts.getStatements(false,"!ex:a",null,"!ex:b");
        System.out.println("Retrieving properties that hold between ex:a and ex:b");
        AGUtils.showTriples(cc);

        // Now with reasoning
        cc = ts.getStatements(true,"!ex:a",null,"!ex:b");
        System.out.println("Inferring properties that hold between ex:a and ex:b");
        AGUtils.showTriples(cc);
        
        // Close the store and disconnect from the server
        ts.closeTripleStore();
        ags.disable();
    }

}

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