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 gettoken
021 */
022package lucee.runtime.functions.string;
023
024import java.util.StringTokenizer;
025
026import lucee.runtime.PageContext;
027import lucee.runtime.exp.ExpressionException;
028import lucee.runtime.exp.FunctionException;
029import lucee.runtime.exp.PageException;
030import lucee.runtime.functions.BIF;
031import lucee.runtime.op.Caster;
032
033public final class GetToken extends BIF {
034
035        private static final long serialVersionUID = 4114410822911429954L;
036
037        public static String call(PageContext pc , String str, double index) throws ExpressionException {
038                return call(pc,str,index,null);
039        }
040        public static String call(PageContext pc , String str, double index, String delimiters) throws ExpressionException {
041                if(delimiters==null) delimiters="\r\n\t ";
042                
043                if(index<1)
044                        throw new FunctionException(pc,"getToken",2,"index","index must be a positive number now ("+((int)index)+")");
045                
046                StringTokenizer tokens=new StringTokenizer(str,delimiters);
047                int count=0;
048                while(tokens.hasMoreTokens()) {
049                        if(++count==index)return tokens.nextToken();
050                        tokens.nextToken();
051                }
052                return "";
053        }
054
055    @Override
056        public Object invoke(PageContext pc, Object[] args) throws PageException {
057        if(args.length==2)
058                        return call(pc, Caster.toString(args[0]), Caster.toDoubleValue(args[1]));
059        if(args.length==3)
060                        return call(pc, Caster.toString(args[0]), Caster.toDoubleValue(args[1]), Caster.toString(args[2]));
061        
062                throw new FunctionException(pc, "GetToken", 2, 3, args.length);
063        }
064}