BlazeDS的和自定义对象的ArrayList [英] BlazeDS and ArrayList of custom objects

问题描述

我使用的BlazeDS与Java的连接Flex。我在传递自定义对象的ArrayList从Flex使用Java的麻烦。

I'm using BlazeDS to connect Flex with Java. I'm having trouble passing ArrayLists of custom objects from Flex to java.

我有两个对象，一个叫类别，其他科。一类具有部分对象的ArrayList。我可以发送一个ArrayList的范畴对象来回Flex和Java之间，问题是，当我尝试访问已从Flex的返回到Java一类对象的部分ArrayList中，我得到以下错误：

I have two objects, one is called Category, the other Section. A Category has an ArrayList of Section objects. I can send an ArrayList of Category objects back and forth between Flex and Java, the problem is when I try to access the sections ArrayList of a Category object that has been returned to Java from Flex, I get the following error:

flex.messaging.MessageException: java.lang.ClassCastException : flex.messaging.io.amf.ASObject

出于某种原因，我得到ASObjects的ArrayList，而不是我第对象。我试图寻找了如何明确ActionScript类型的数组，但我唯一能找到的是使用Vector对象，BlazeDS的不支持。是否有可能通过部分对象的ArrayList类对象的ArrayList中，还是我到处找另一种方式？

For some reason I'm getting an ArrayList of ASObjects rather than my Section objects. I tried looking up how to explicitly type arrays in actionscript, but the only thing I could find was using a Vector object, which BlazeDS does not support. Is it possible to pass an ArrayList of Section objects within an ArrayList of Category objects, or do I have to find another way around?

推荐答案

Flex的竟是发回flex.messaging.io.ArrayCollection对象。下面是code将其转换为我的Java类的ArrayList

Flex was actually sending back a flex.messaging.io.ArrayCollection object. Below is the code to convert this to an ArrayList of my java class:

public ArrayList<MyObject> convertArrayCollection(ArrayCollection array){
        ArrayList<MyObject> myObjectArray = new ArrayList();
        ASTranslator ast = new ASTranslator();
        MyObject myObject;
        ASObject aso;

        for (int i=0;i< array.size(); i++){
            myObject = new MyObject();
            aso = new ASObject();

            aso = (ASObject) array.get(i);
            aso.setType("com.myPackage.MyObject");
            myObject = (MyObject) ast.convert(aso, MyObject.class);
            myObjectArray.add(myObject);
        }
        return myObjectArray;
    }

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