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 right
021 */
022package lucee.runtime.functions.string;
023
024import lucee.runtime.PageContext;
025import lucee.runtime.exp.ExpressionException;
026import lucee.runtime.exp.FunctionException;
027import lucee.runtime.exp.PageException;
028import lucee.runtime.functions.BIF;
029import lucee.runtime.op.Caster;
030
031public final class Right extends BIF {
032        
033        private static final long serialVersionUID = 2270997683293984478L;
034
035        public static String call(PageContext pc, String str, double number) throws ExpressionException {
036                int len = (int)number;
037                if (len == 0) throw new ExpressionException("parameter 2 of the function right can not be 0");
038                int l=str.length();
039                if (Math.abs(len) >= l) return str;
040                if (len < 0) len = l + len;
041                return str.substring(l-len,l);
042        }
043
044    @Override
045        public Object invoke(PageContext pc, Object[] args) throws PageException {
046                if(args.length==2)
047                        return call(pc, Caster.toString(args[0]), Caster.toDoubleValue(args[1]));
048                throw new FunctionException(pc, "Right", 2, 2, args.length);
049        }
050}