Spring Social, Create connection for existing local users on signin -

i trying allow existing local users signin using spring social, google, , automatically create new userconnection if email matches local account.

i have found examples implicit signup (requires/creates new account), new user signup (default action if springsocial fails find userconnection) , connect option while current user logged in.

how can extend springsocial let me check existing social user / local user email match, create user connection existing local user , sign them both local , social?

you can use implicit sign find account instead of creating new one.

modifying code found implicit sign up, can similar following:

public class accountconnectionsignup implements connectionsignup {      private final accountrepository accountrepository;      public accountconnectionsignup(accountrepository accountrepository) {         this.accountrepository = accountrepository;     }      public string execute(connection<?> connection) {         userprofile profile = connection.fetchuserprofile();         account account = accountrepository.findaccountbyemail(profile.getemail());         return account == null ? null : account.getusername();     }  } 

you need implement account , accountrepository support email property, use repository find account email. if repository cannot find account, return null.