Updated readme

Author: guy120494

README.md

@@ -230,10 +230,13 @@ Relay [specification for mutations](https://facebook.github.io/relay/graphql/mut
 ### Connection
 
 You can use `@GraphQLConnection` annotation to make a field iterable in adherence to Relay [Connection specification](https://facebook.github.io/relay/graphql/connections.htm).\
-The default connection makes you fetch ALL the data, and then builds the connections object (ie edges and nodes).\
-If you want to fetch only the relevant data each time (with the "first","last","before" and "after" arguments)
-you should annotate your field with `@GraphQLConnection(connection = EnhancedConnectionFetcher.class)`,
-and make the associated data fetcher implement `PaginationDataFetcher`
+If a field is annotated with the annotation, the associated dataFetcher must return an instance of `PaginatedData`.\
+The `PaginatedData` class holds the result of the conneciton:
+1. The data of the page
+2. Whether or not has next page and previous page
+3. A method that returns for each entity the encoded cursor of the entity (it returns string)
+
+NOTE: because `PropertyDataFetcher` and `FieldDataFetcher` can't handle connection, this annotation cant be used on a field that doesn't have a dataFetcher
 
 ### Customizing Relay schema