/**
*
* Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
**/
package lucee.runtime.functions.decision;
import lucee.runtime.PageContext;
import lucee.runtime.exp.FunctionException;
import lucee.runtime.exp.PageException;
import lucee.runtime.ext.function.Function;
import lucee.runtime.functions.string.Len;
import lucee.runtime.op.Caster;
public class IsEmpty implements Function {
private static final long serialVersionUID = -2839407878650099024L;
public static boolean call(PageContext pc , Object value) throws PageException {
if(value==null) return true;
if(value instanceof Boolean || value instanceof Number) return false;
double len=Len.invoke(value, -1);
if(len==-1)throw new FunctionException(pc,"isEmpty",1,"variable","this type ["+Caster.toTypeName(value)+"] is not supported");
return len==0;
}
}