AGFreetextIndex.java
package com.franz.agbase.examples;
import com.franz.agbase.*;
public class AGFreetextIndex {
/**
* Demonstrates Freetext indexing and search on the Kennedy data
*
* @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
AllegroGraph ts = ags.renew("kennedy", AGPaths.TRIPLE_STORES);
// Register any predicates whose objects are to be searched for text
// You must register predicates before the data is loaded.
ts.registerFreetextPredicate("<http://example.org/kennedy/first-name>");
// You can confirm that the server got the registration
String[] ftpreds = ts.getFreetextPredicates();
AGUtils.printStringArray("getFreetextPredicates:", ftpreds);
// Load the Kennedy data
AGLoadNtriples.loadNTriplesWithTiming(ts, AGPaths.dataSources("kennedy.ntriples"));
// Index the store for querying, wait until indexing is complete.
ts.indexAllTriples(true);
// Search the store for statements whose objects contain Arnold
TriplesIterator cc = ts.getFreetextStatements("'Arnold'");
AGUtils.showTriples(cc);
// Close the triple store and disconnect from the server
ts.closeTripleStore();
ags.disable();
}
}
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