Len.java example

Explorer
Lucee-master
/**
 *
 * 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/>.
 * 
 **/
/**
 * Implements the CFML Function len
 */
package lucee.runtime.functions.string;

import java.util.List;
import java.util.Map;

import lucee.runtime.PageContext;
import lucee.runtime.exp.FunctionException;
import lucee.runtime.ext.function.Function;
import lucee.runtime.op.Caster;
import lucee.runtime.type.Collection;
import lucee.runtime.type.Query;

public final class Len implements Function {
	public static double call(PageContext pc , String string) {
		return string.length();
	}
	public static double call(PageContext pc , Object obj) throws FunctionException {
		double len=invoke(obj, -1);
		if(len==-1)throw new FunctionException(pc,"len",1,"object","this type  ["+Caster.toTypeName(obj)+"] is not supported for returning the len");
		return len;
	}
	
	public static double invoke(Object obj, double defaultValue) {
		if(obj instanceof CharSequence)return ((CharSequence)obj).length();
		if(obj instanceof Query)return ((Query)obj).getRecordcount();
		if(obj instanceof Collection)return ((Collection)obj).size();
		if(obj instanceof Map)return ((Map)obj).size();
		if(obj instanceof List)return ((List)obj).size();
		if(obj instanceof Object[])return ((Object[])obj).length;
		if(obj instanceof short[])return ((short[])obj).length;
		if(obj instanceof int[])return ((int[])obj).length;
		if(obj instanceof float[])return ((float[])obj).length;
		if(obj instanceof double[])return ((double[])obj).length;
		if(obj instanceof long[])return ((long[])obj).length;
		if(obj instanceof char[])return ((char[])obj).length;
		if(obj instanceof boolean[])return ((boolean[])obj).length;
		if(obj instanceof byte[])return ((byte[])obj).length;
		String str = Caster.toString(obj,null);
		if(str!=null) return str.length();
		
		return defaultValue;
	}
}