flex序列化

最新推荐文章于 2022-05-20 17:21:44 发布

iteye_4282

最新推荐文章于 2022-05-20 17:21:44 发布

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分类专栏： Flex 文章标签： Flex XML

本文链接：https://blog.youkuaiyun.com/iteye_4282/article/details/82061266

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本文介绍使用Flex进行前后台数据交互的方法，包括通过HTTPService加载和保存XML数据的具体实现过程，并介绍了如何实现延迟加载以及序列化自定义类。

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2. Flex前台
2.1 加载数据：通过HTTPService从后台加载XML数据，这里将当前子网的ID传给了后台。数据获取后，通过SerializeAdapter.deserialize方法将XML数据反序列化。为了实现延迟加载，这里在network上添加了Interaction事件监听。

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network.addInteractionListener(function(e:InteractionEvent):void {
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if (e.kind == InteractionEvent.ENTER_SUBNETWORK) {
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if (network.currentSubNetwork.getClient("LOADED") != "true") {
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loadCurrentSubnetwork();
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network.currentSubNetwork.setClient("LOADED", "true");
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}
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}
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});
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private function loadCurrentSubnetwork():void{
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var service:HTTPService = new HTTPService();
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service.resultFormat = "e4x";
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service.url = URL;
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service.addEventListener("result", function(e:*):void{
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if(e.result != null){
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serializer.deserialize(e.result, network.currentSubNetwork);
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}
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});
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service.addEventListener("fault", function(e:*):void{
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trace(e);
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});
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var params:Object = new Object();
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if(network.currentSubNetwork != null){
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params.currentSubNetwork = network.currentSubNetwork.id.toString();
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}
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service.send(params);
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}
2.2 保存数据：通过SerializeAdapter.serialize方法将Topo数据序列化成XML数据，用HTTPService保存XML数据，这里将当前子网的ID传给了后台。通过SerializeAdapter.filterFunction，可以过滤非当前子网的网元。

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serializer.filterFunction = function(data:IData):Boolean {
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return Utils.getSubNetwork(data as IElement) == network.currentSubNetwork;
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};
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private function saveCurrentSubnetwork():void{
var service:HTTPService = new HTTPService();
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service.resultFormat = "e4x";
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service.url = URL;
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service.addEventListener("fault", function(e:*):void{
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trace(e);
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});
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var params:Object = new Object();
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params.action = "save";
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if(network.currentSubNetwork != null){
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params.currentSubNetwork = network.currentSubNetwork.id.toString();
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}
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params.topoXml = encodeURIComponent(serializer.serialize());
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service.send(params);
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}
2.3 默认只序列化TWaver提供的默认网元，比如Node、Link等。如果要序列化从TWaver基类继承的自定义类，需要添加如下代码：

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//注册自定义类
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SerializeAdapterSetting.registerGlobalClass("CNode", FlexNode);
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//注册自定义属性
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SerializeAdapterSetting.registerGlobalProperty("customProperty", Consts.TYPE_STRING, true);
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//注册自定义Client属性
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SerializeAdapterSetting.registerGlobalClient(FlexNode.CUSTOM_CLIENT, Consts.TYPE_STRING);
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//注册序列化方法
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SerializeAdapterSetting.registerGlobalXMLSerializeFunction(FlexNode,
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function(serializer:SerializeAdapter, instance:Object, newInstance:Object):void{
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serializer.serializeProperty(instance, "customProperty", newInstance);
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});