Question

我们有Class对象（引用Class的对象），因此您可以从该Class对象创建对象：

var classObject:Class = package.to.class.AClass;
var objectFromClass:AClass = new classObject();

现在，我想知道classObject引用了哪个对象。例如：

function Creator(classObject:Class):AClass
{
    // here I want to know what class is referenced by classObject
    return new classObject();
}

var classObject:Class = package.to.class.AClass;
var objectFromClass:AClass = Creator(classObject);

这有效，但如果我传递一个不引用AClass的Class对象怎么办？我想知道这是否发生并对此有所了解。

---编辑---

搜索我发现了这个功能

flash.utils.getQualifiedClassName（值：*）：字符串此函数返回类的名称，例如：

var name:String = '';
// name = ''

name = flash.utils.getQualifiedClassName(package.to.class.AClass);
// name = 'AClass'

name = ''
// name = ''

var anInstance:AClass = new AClass();
name = flash.utils.getQualifiedClassName(anInstance);
// name = 'AClass'

所以，我所要做的就是比较该函数的结果：

function Creator(classObject:Class):AClass
{
    var anInstance:AClass = new AClass();
    var className:String = flash.utils.getQualifiedClassName(anInstance);
    var classObjectName:String = flash.utils.getQualifiedClassName(classObject);

    // here className and classObjectName are 'AClass' :)
    if (className != classObjectName)
        throw new Error('The classes are different');

    return new classObject();
}

var classObject:Class = package.to.class.AClass;
var objectFromClass:AClass = Creator(classObject);

---编辑2 ---

另一种方法是使用Object类的构造函数属性：

function Creator(classObject:Class):AClass
{
    var tempInstance:AClass = new AClass();
    var tempClassObject:Class = Object(tempInstance).constructor;

    if (classObject != tempClassObject)
        throw new Error('The classes are different');

    return new classObject();
}

Answer 1

我发现完成此任务的最简单（不知道是否是最快）的方法是在下一个示例中：

function Creator(classObject:Class):AClass
{
    var anInstance:Object = new classObject() as AClass;
    if (anInstance == null)
        throw new Error('The classes are different');

    return new classObject(); // or return anInstance as AClass;
}

如果AClass是一个接口，这也有效。

如何知道Class对象引用了哪个类？

1 个答案: