从ActionScript中的类获取静态属性

我有这个班

package somePackage
{
    public class SomeClass
    {
        public static const FOO: SomeClass = new SomeClass("0");
        public static const BAR: SomeClass = new SomeClass("1");
        }
}

我想能够得到这些静态属性,给出它的名称。

例子:

public static function getProperty(propertyName: String): SomeClass {
    //don't know what goes here
}

var property1:SomeClass = SomeClass.getProperty("FOO"); // property1 == SomeClass.FOO
var property2:SomeClass = SomeClass.getProperty("BAR"); // property2 == SomeClass.Bar