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 rjustify
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 RJustify extends BIF {
032
033        private static final long serialVersionUID = -4245695462372641408L;
034
035        public static String call(PageContext pc , String str, double length) throws ExpressionException {
036                int len=(int) length;
037                if(len<1) throw new ExpressionException("Parameter 2 of function rJustify which is now ["+len+"] must be a positive integer");
038                else if((len-=str.length())<=0) return str;
039                else {
040                        StringBuilder sb=new StringBuilder(str.length()+len);
041                        for(int i=1;i<=len;i++) {
042                                sb.append(' ');
043                                //str=" "+str;
044                        }
045                        return sb.append(str).toString();
046                }
047        }
048
049    @Override
050        public Object invoke(PageContext pc, Object[] args) throws PageException {
051                if(args.length==2)
052                        return call(pc, Caster.toString(args[0]), Caster.toDoubleValue(args[1]));
053                throw new FunctionException(pc, "RJustify", 2, 2, args.length);
054        }
055}