/* 
 * Copyright 2015 Ryan Gilera.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.daytron.revworks.authentication;

import com.github.daytron.revworks.service.NoCurrentUserException;
import com.github.daytron.revworks.service.WrongCurrentUserTypeException;
import com.github.daytron.revworks.data.UserType;
import java.security.Principal;

/**
 * The base interface for authentication and authorisation checks.
 *
 * @author Ryan Gilera
 */
public interface AccessControl {

    public void signIn(UserType userType, String userfield, String password) 
            throws AuthenticationException;

    public boolean isUserSignedIn();

    public boolean isUserAStudent() throws NoCurrentUserException ;

    public boolean isUserALecturer() throws NoCurrentUserException;

    public String getPrincipalName() throws NoCurrentUserException ;
    
    public String getFirstName() throws NoCurrentUserException ;
    
    public String getLastName() throws NoCurrentUserException ;
    
    public String getLecturerEmail() throws NoCurrentUserException, 
            WrongCurrentUserTypeException;
    
    public String getStudentID() throws NoCurrentUserException, 
            WrongCurrentUserTypeException;
    
    public String getUserTypeString() throws NoCurrentUserException ;
    
    public UserType getUserType() throws NoCurrentUserException ;
    
    public void signOut();
}

@@ -838,40 +838,8 @@
 ype;
-%0Aimport java.security.Principal;
 %0A%0A/*
@@ -880,20 +880,17 @@
 tication
- and
+,
  authori
@@ -902,16 +902,52 @@
 n checks
+ and access %0A * control for the user
 .%0A *%0A * 

Fix import and update comment