001    /*
002     * 
003     * $Revision: 13085 $ $Date: 2008-02-06 18:27:24 +0100 (Mi, 06 Feb 2008) $
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.parsers.bool;
025    
026    import org.jdom.Attribute;
027    import org.jdom.Element;
028    
029    /**
030     * @author Frank Lützenkirchen
031     */
032    public class MCRNotCondition implements MCRCondition {
033        private MCRCondition child;
034    
035        public MCRNotCondition(MCRCondition child) {
036            this.child = child;
037        }
038    
039        public MCRCondition getChild() {
040            return child;
041        }
042    
043        public String toString() {
044            return "not (" + child + ")";
045        }
046    
047        public boolean evaluate(Object o) {
048            return !child.evaluate(o);
049        }
050    
051        public Element toXML() {
052            Element not = new Element("boolean");
053            not.setAttribute("operator", "not");            
054            not.addContent(child.toXML());
055            return not;
056        }
057    
058        public Element info() {
059            Element el = new Element("info");
060            el.setAttribute(new Attribute("type", "not"));
061            el.setAttribute(new Attribute("children", "1"));
062    
063            return el;
064        }
065    
066        public void accept(MCRConditionVisitor visitor) {
067            visitor.visitType(info());
068            child.accept(visitor);
069        }
070    }