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();
}
}
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