RepositoryBasedUserDetailsService.java

package it.demo.twitterlike.server.security;

import it.demo.twitterlike.server.domain.Authority;
import it.demo.twitterlike.server.domain.User;
import it.demo.twitterlike.server.repository.UserRepository;

import java.util.ArrayList;
import java.util.Collection;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;


@Component("userDetailsService")
@Transactional
public class RepositoryBasedUserDetailsService implements UserDetailsService {

    private final Logger log = LoggerFactory.getLogger(UserDetailsService.class);

    @Autowired
    private UserRepository userRepository;
    
  
    @Override
    @Transactional
    public UserDetails loadUserByUsername(final String login) {
        log.debug("Authenticating {}", login);
        String lowercaseLogin = login.toLowerCase();

        User userFromDatabase = userRepository.findOne(lowercaseLogin);
        if (userFromDatabase == null) {
            throw new UsernameNotFoundException("User " + lowercaseLogin + " was not found in the database");
        } else if (!userFromDatabase.getActivated()) {
          //  throw new UserNotActivatedException("User " + lowercaseLogin + " was not activated");
        }

        Collection<GrantedAuthority> grantedAuthorities = new ArrayList<>();
        for (Authority authority : userFromDatabase.getAuthorities()) {
            GrantedAuthority grantedAuthority = new SimpleGrantedAuthority(authority.getName());
            grantedAuthorities.add(grantedAuthority);
        }

        return new InternalUserDetails(userFromDatabase,
                grantedAuthorities);
    }

}