Grails - Custom UserDetailsService

CustomUserDetailsService.groovy

import org.codehaus.groovy.grails.plugins.springsecurity.GrailsUserDetailsService
import org.springframework.security.core.userdetails.UserDetails
import org.springframework.security.core.userdetails.UsernameNotFoundException

import User

class CustomUserDetailsService implements GrailsUserDetailsService {
        //this creates a List of GrantedAuthorityImpl
	MyAuthoritiesBuilder myAuthoritiesBuilder
	
	UserDetails loadUserByUsername(String username, boolean loadRoles) throws UsernameNotFoundException { 
		return loadUserByUsername(username) 
	}

	UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
		
		User user = User.get(username.toUpperCase())
		
		if (!user) {
			throw new UsernameNotFoundException('User not found', username)
		}
		
		InsoftGrailsUser grailsUser = new InsoftGrailsUser(user.id, user.passwrod, true, !user.accountExpired,
			!user.passwordExpired, !user.accountLocked, myAuthoritiesBuilder.getAuthorities(user), user.id)
		
		grailsUser.uniqueIdentifier = myAuthoritiesBuilder.uniqueIdentifier
		
		return grailsUser
	}
	
}

import org.codehaus.groovy.grails.plugins.springsecurity.SpringSecurityUtils
import org.springframework.security.core.authority.GrantedAuthorityImpl

import br.com.insoft.seguranca.SegurancaService
import br.com.insoft4.seguranca.UsuarioPonto

class MyAuthoritiesBuilder {

	static final List NO_ROLES = [new GrantedAuthorityImpl(SpringSecurityUtils.NO_ROLE)]
	
	def grailsApplication
	
	public List<GrantedAuthorityImpl> getAuthorities(User user) {
		def roles = []
		
		SecurityService securityService = getSecurityService()
		
		if(securityService.userCanAccess(user, "FORMS_CODE1")) {
			roles << new GrantedAuthorityImpl("ROLE_FORMS_CODE1")
		}
		
		if(securityService.userCanAccess(user, "FORMS_CODE2")) {
			roles << new GrantedAuthorityImpl("ROLE_FORMS_CODE2")
		}
		
		if(roles.empty) {
			roles = NO_ROLES
		}
		
		return roles
	}
	
	public Long getUniqueIdentifier() {
		return getUtilService().getNextSequenceValue() //sequence to identify uniquely the user session
	}
	
	private def getUtilService() {
		return grailsApplication.mainContext.getBean("utilService")
	}
	
	private def getSecurityService() {
		return grailsApplication.mainContext.getBean("securityService")
	}
	
}


//beans declaration in resources.groovy

myAuthoritiesBuilder(MyAuthoritiesBuilder) {
  grailsApplication = ref('grailsApplication')
}
	 
userDetailsService(CustomUserDetailsService) {
  myAuthoritiesBuilder = ref('myAuthoritiesBuilder')
}