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 **/
019/**
020 * Implements the CFML Function listappend
021 */
022package lucee.runtime.functions.list;
023
024import lucee.runtime.PageContext;
025import lucee.runtime.exp.FunctionException;
026import lucee.runtime.exp.PageException;
027import lucee.runtime.functions.BIF;
028import lucee.runtime.op.Caster;
029
030public final class ListAppend extends BIF {
031
032        private static final long serialVersionUID = -4893447489733907241L;
033
034        public static String call(PageContext pc , String list, String value) {
035                if(list.length()==0) return value;
036                return new StringBuilder(list).append(',').append(value).toString();
037        }
038        public static String call(PageContext pc , String list, String value, String delimiter) {
039                if(list.length()==0) return value;
040        switch(delimiter.length()) {
041        case 0:return list;
042        case 1:return new StringBuilder(list).append(delimiter).append(value).toString();
043        }
044        return new StringBuilder(list).append(delimiter.charAt(0)).append(value).toString();
045        }
046
047    @Override
048        public Object invoke(PageContext pc, Object[] args) throws PageException {
049        if(args.length==2)
050                        return call(pc, Caster.toString(args[0]), Caster.toString(args[1]));
051        if(args.length==3)
052                        return call(pc, Caster.toString(args[0]), Caster.toString(args[1]), Caster.toString(args[2]));
053
054                throw new FunctionException(pc, "ListAppend", 2, 3, args.length);
055        }
056        
057}