01 package net.sf.annocon.examples.basic.authentication;
02
03 /**
04 * Interface for a service that offers access to user data.
05 *
06 * @author Achim Huegen
07 */
08 public interface UserManager
09 {
10 /**
11 * Returns the data of a user.
12 * @param username
13 * @return Null if user is unknown, otherwise the password is returned.
14 */
15 public String getUserData(String username);
16
17 }
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