DATADOC-88 - Create MongoDbFactory to consolidate DB, Server location, and user credentials into one location

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

@@ -9,6 +9,6 @@ public interface MongoDbFactory {
 
 	DB getDb() throws DataAccessException;
 	
-	Mongo getMongo();
+	DB getDb(String dbName) throws DataAccessException;
 	
 }

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

@@ -51,6 +51,14 @@ public class SimpleMongoDbFactory implements MongoDbFactory {
     return MongoDbUtils.getDB(mongo, databaseName, username, password == null ? null : password.toCharArray());
   }
   
+  public DB getDb(String dbName) throws DataAccessException {
+    Assert.notNull(mongo, "Mongo must not be null");
+    Assert.hasText(dbName, "Database name must not be empty");
+    return MongoDbUtils.getDB(mongo, dbName, username, password == null ? null : password.toCharArray());
+  }
+  
+  
+
   public Mongo getMongo() {
     return this.mongo;
   }

spring-data-mongodb/src/main/java/org/springframework/data/document/mongodb/convert/MappingMongoConverter.java

@@ -596,7 +596,7 @@ public class MappingMongoConverter extends AbstractMongoConverter implements App
 		}
 
 		String dbname = dbref.db();
-		DB db = StringUtils.hasText(dbname) ? mongoDbFactory.getMongo().getDB(dbname) : mongoDbFactory.getDb();
+		DB db = StringUtils.hasText(dbname) ? mongoDbFactory.getDb(dbname) : mongoDbFactory.getDb();
 		return new DBRef(db, collection, id);
 	}