001    /*
002     * 
003     * $Revision$ $Date$
004     *
005     * This file is part of ***  M y C o R e  ***
006     * See http://www.mycore.de/ for details.
007     *
008     * This program is free software; you can use it, redistribute it
009     * and / or modify it under the terms of the GNU General Public License
010     * (GPL) as published by the Free Software Foundation; either version 2
011     * of the License or (at your option) any later version.
012     *
013     * This program is distributed in the hope that it will be useful, but
014     * WITHOUT ANY WARRANTY; without even the implied warranty of
015     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
016     * GNU General Public License for more details.
017     *
018     * You should have received a copy of the GNU General Public License
019     * along with this program, in a file called gpl.txt or license.txt.
020     * If not, write to the Free Software Foundation Inc.,
021     * 59 Temple Place - Suite 330, Boston, MA  02111-1307 USA
022     */
023    
024    package org.mycore.access.mcrimpl;
025    
026    import org.jdom.Attribute;
027    import org.jdom.Element;
028    import org.mycore.parsers.bool.MCRCondition;
029    import org.mycore.parsers.bool.MCRConditionVisitor;
030    import org.mycore.user.MCRUserFacade;
031    
032    /**
033     * Implementation of a (user xy) clause
034     * 
035     * @author Matthias Kramm
036     */
037    class MCRUserClause implements MCRCondition {
038        private String user;
039        private boolean not;
040    
041        MCRUserClause(String user, boolean not) {
042            this.user = user;
043            this.not = not;
044        }
045    
046        public boolean evaluate(Object o) {
047            return this.user.equals(MCRUserFacade.getCurrentUser()) ^ this.not;
048        }
049    
050        public String toString() {
051            return "user" + (this.not? " != ": " = ") + user + " ";
052        }
053    
054        public Element toXML() {
055            Element cond = new Element("condition");
056            cond.setAttribute("field", "user");
057            cond.setAttribute("operator", (this.not? "!=": "="));
058            cond.setAttribute("value", user);
059            return cond;
060        }
061    
062        public Element info() {
063            Element el = new Element("info");
064            el.setAttribute(new Attribute("type", "USER"));
065            return el;
066        }
067    
068        public void accept(MCRConditionVisitor visitor) { 
069            visitor.visitType(info());
070        }
071    };