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/*
 * This file is part of ***  M y C o R e  ***
 * See http://www.mycore.de/ for details.
 *
 * MyCoRe is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * MyCoRe is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with MyCoRe.  If not, see .
 */

package org.mycore.common;

/**
 * Encapsulates informations about the current authenticated user.
 * 
 * A instance of this interface is always bound to {@link MCRSession}
 * and can be requested via {@link MCRSession#getUserInformation()}.
 * An implementer of this interface should bind the instance to the session via
 * {@link MCRSession#setUserInformation(MCRUserInformation)}.
 * @author Thomas Scheffler (yagee)
 *
 */
public interface MCRUserInformation {

    String ATT_PRIMARY_GROUP = "primaryGroup";

    String ATT_REAL_NAME = "realName";

    String ATT_EMAIL = "eMail";

    /**
     * The UserID is the information that is used in user clauses of the ACL System.
     */
    String getUserID();

    /**
     * The role information is used in group clauses of the ACL System.
     */
    boolean isUserInRole(String role);

    /**
     * Get additional attributes if they are provided by the underlying user system
     * @param attribute user attribute name
     * @return attribute value as String or null if no value is defined;
     */
    String getUserAttribute(String attribute);

}