DATADOC-189 - Improved extensibility of MongoRepositoryFactoryBean.

Creation of MongoRepositoryFactory is now delegated into a template method that gets a MongoTemplate handed over.

spring-data-mongodb/src/main/java/org/springframework/data/document/mongodb/repository/MongoRepositoryFactoryBean.java

@@ -79,13 +79,23 @@ public class MongoRepositoryFactoryBean<T extends Repository<S, ID>, S, ID exten
 	 * #createRepositoryFactory()
 	 */
 	@Override
-	protected RepositoryFactorySupport createRepositoryFactory() {
+	protected final RepositoryFactorySupport createRepositoryFactory() {
 
-		MongoRepositoryFactory factory = new MongoRepositoryFactory(template);
+		RepositoryFactorySupport factory = getFactoryInstance(template);
 		factory.addQueryCreationListener(new IndexEnsuringQueryCreationListener(template));
 		return factory;
 	}
 	
+	/**
+	 * Creates and initializes a {@link RepositoryFactorySupport} instance.
+	 * 
+	 * @param template
+	 * @return
+	 */
+	protected RepositoryFactorySupport getFactoryInstance(MongoTemplate template) {
+		return new MongoRepositoryFactory(template);
+	}
+
 	/*
 	 * (non-Javadoc)
 	 *