ObjectUtil

/*
    CASA Framework for ActionScript 2.0
    Copyright (C) 2006  CASA Framework
    http://casaframework.org
    
    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, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

import org.casaframework.util.TypeUtil;

/**
    @author Aaron Clinger
    @author David Nelson
    @version 08/22/06
*/

class org.casaframework.util.ObjectUtil {
    
    
    public function contains(obj:Object, member:Object):Boolean {
        for (var prop:String in obj) if (obj[prop] == member) return true;
        return false;
    }
    
    public static function clone(org:Object):Object {
        var cloneObj:Object = new Object();

        for (var prop:String in org) {
            switch (TypeUtil.getTypeOf(org[prop])) {
                case 'array' :
                    var i:Number = -1;
                    cloneObj[prop] = new Array();
                    while (++i <  org[prop].length) cloneObj[prop].push(org[prop][i]);
                    break;
                case 'object' :
                    cloneObj[prop] = ObjectUtil.clone(org[prop]);
                    break;
                default :
                    cloneObj[prop] = org[prop];
                    break;
            }
        }

        return cloneObj;
    }
        
    public static function isUndefined(obj:Object):Boolean {
        return obj === undefined;
    }
    
    public static function isNull(obj:Object):Boolean {
        return obj === null;
    }
    
    public static function isEmpty(obj:Object):Boolean {
        if (obj == undefined) return true;
        
        switch (TypeUtil.getTypeOf(obj)) {
            case 'string' :
            case 'array' :
                return (obj.length == 0) ? true : false;
                break;
            case 'object' :
                for (var prop:String in obj) return true;                
                break;
        }
        
        return false;
    }
    
    private function ObjectUtil() {} // Prevents instance creation
}