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 removechars 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 RemoveChars extends BIF { 032 public static String call(PageContext pc , String str, double s, double l) throws ExpressionException { 033 int start=(int) s; 034 int length=(int) l; 035 int strLength=str.length(); 036 037 // check param 2 038 if(start<1 || start>strLength) 039 throw new ExpressionException("Parameter 2 of function removeChars which is now ["+start+"] must be a greater 0 and less than the length of the first parameter"); 040 041 // check param 3 042 if(length<0) 043 throw new ExpressionException("Parameter 3 of function removeChars which is now ["+length+"] must be a non-negative integer"); 044 045 if(strLength==0) return ""; 046 047 String rtn=str.substring(0,start-1); 048 049 if(start+length<=strLength) rtn+=str.substring(start+length-1); 050 return rtn; 051 } 052 053 @Override 054 public Object invoke(PageContext pc, Object[] args) throws PageException { 055 if(args.length==3) 056 return call(pc, Caster.toString(args[0]), Caster.toDoubleValue(args[1]), Caster.toDoubleValue(args[2])); 057 058 throw new FunctionException(pc, "RemoveChars", 3, 3, args.length); 059 } 060}