/*
* Copyright Aduna (http://www.aduna-software.com/) (c) 2007.
*
* Licensed under the Aduna BSD-style license.
*/
package org.openrdf.query.resultio;
import info.aduna.lang.service.FileFormatServiceRegistry;
/**
* A registry that keeps track of the available
* {@link TupleQueryResultWriterFactory}s.
*
* @author Arjohn Kampman
*/
public class TupleQueryResultWriterRegistry extends
FileFormatServiceRegistry<TupleQueryResultFormat, TupleQueryResultWriterFactory>
{
private static TupleQueryResultWriterRegistry defaultRegistry;
/**
* Gets the default TupleQueryResultWriterRegistry.
*
* @return The default registry.
*/
public static synchronized TupleQueryResultWriterRegistry getInstance() {
if (defaultRegistry == null) {
defaultRegistry = new TupleQueryResultWriterRegistry();
}
return defaultRegistry;
}
public TupleQueryResultWriterRegistry() {
super(TupleQueryResultWriterFactory.class);
}
@Override
protected TupleQueryResultFormat getKey(TupleQueryResultWriterFactory factory) {
return factory.getTupleQueryResultFormat();
}
}