how to synchronize between local database and Parse in android?

I am using parse for chat application in android for storing the data I am using both the server and local database(Parse.enableLocalDatastore()) it is working fine, the problem is with fetching data from the database like if network is not available the data will return from local database and if it is available it will return directly from parse so how can i differentiate between them? should i use query.fromLocalDatastore() method while quering the data or not?