001/**
002 *
003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
004 *
005 * This library is free software; you can redistribute it and/or
006 * modify it under the terms of the GNU Lesser General Public
007 * License as published by the Free Software Foundation; either 
008 * version 2.1 of the License, or (at your option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013 * Lesser General Public License for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public 
016 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
017 * 
018 **/
019package lucee.runtime.type.comparator;
020
021import java.util.Comparator;
022
023import lucee.commons.lang.ComparatorUtil;
024import lucee.runtime.PageContext;
025import lucee.runtime.engine.ThreadLocalPageContext;
026import lucee.runtime.exp.PageException;
027import lucee.runtime.op.Caster;
028
029
030/**
031 * Implementation of a Comparator, compares to Softregister Objects
032 */
033public final class SortRegisterComparator implements ExceptionComparator {
034        
035        private boolean isAsc;
036        private PageException pageException=null;
037    private boolean ignoreCase;
038        private final Comparator comparator;
039
040
041        /**
042         * constructor of the class 
043         * @param isAsc is ascending or descending
044         * @param ignoreCase do ignore case 
045         */
046        public SortRegisterComparator(PageContext pc,boolean isAsc, boolean ignoreCase, boolean localeSensitive) {
047            this.isAsc=isAsc;
048            this.ignoreCase=ignoreCase;
049            
050            comparator = ComparatorUtil.toComparator(
051                        ignoreCase?ComparatorUtil.SORT_TYPE_TEXT_NO_CASE:ComparatorUtil.SORT_TYPE_TEXT
052                        , isAsc, localeSensitive?ThreadLocalPageContext.getLocale(pc):null, null);
053                
054        }
055        
056        /**
057         * @return Returns the expressionException.
058         */
059        public PageException getPageException() {
060                return pageException;
061        }
062        
063        @Override
064        public int compare(Object oLeft, Object oRight) {
065                try {
066                        if(pageException!=null) return 0;
067                        else if(isAsc) return compareObjects(oLeft, oRight);
068                        else return compareObjects(oRight, oLeft);
069                } catch (PageException e) {
070                        pageException=e;
071                        return 0;
072                }
073        }
074        
075        private int compareObjects(Object oLeft, Object oRight) throws PageException {
076                String strLeft=Caster.toString(((SortRegister)oLeft).getValue());
077                String strRight=Caster.toString(((SortRegister)oRight).getValue());
078                return comparator.compare(strLeft, strRight);
079        }
080
081}