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 insert 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 Insert extends BIF { 032 033 private static final long serialVersionUID = 5926183314989306282L; 034 035 public static String call(PageContext pc , String sub, String str, double pos) throws ExpressionException { 036 int p=(int) pos; 037 if(p<0 || p>str.length()) 038 throw new ExpressionException("third parameter of the function insert, must be between 0 and "+str.length()+" now ["+(p)+"]"); 039 StringBuilder sb=new StringBuilder(str.length()+sub.length()); 040 041 return sb.append(str.substring(0,p)).append(sub).append(str.substring(p)).toString(); 042 } 043 044 @Override 045 public Object invoke(PageContext pc, Object[] args) throws PageException { 046 if(args.length==3) 047 return call(pc, Caster.toString(args[0]), Caster.toString(args[1]), Caster.toDoubleValue(args[2])); 048 049 throw new FunctionException(pc, "Insert", 2, 3, args.length); 050 } 051}