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 **/ 019package lucee.runtime.functions.string; 020 021import lucee.commons.lang.StringUtil; 022import lucee.runtime.PageContext; 023import lucee.runtime.exp.FunctionException; 024import lucee.runtime.exp.PageException; 025import lucee.runtime.functions.BIF; 026import lucee.runtime.op.Caster; 027 028/** 029 * implements the String member method isEmpty() 030 */ 031public class StringIsEmpty extends BIF { 032 033 private static final long serialVersionUID = -85767818984230151L; 034 035 public static boolean call(PageContext pc , String value) { 036 037 return StringUtil.isEmpty(value); 038 } 039 040 @Override 041 public Object invoke(PageContext pc, Object[] args) throws PageException { 042 043 if (args.length != 1) 044 throw new FunctionException(pc, "IsEmpty", 1, 1, args.length); 045 046 return call(pc, Caster.toString(args[0])); 047 } 048}