Flex中Object, String, XML, ArrayCollection互转

The code below demonstrates the data type conversions among basic DataTypes used most in Flex. The ‘init()’ method does to and from conversion for ArrayCollection to XML and XML to ArrayCollection

Object,String,XML,ArrayCollection

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import mx.collections.ArrayCollection;

import mx.rpc.xml.SimpleXMLEncoder;

import mx.rpc.xml.SimpleXMLDecoder;

import mx.utils.ObjectUtil;

??private function xmlToArrayCollection(xml:XML):ArrayCollection{?????????????????

????????????var xmlDoc:XMLDocument = new XMLDocument(xml.toString());

???????????var decoder:SimpleXMLDecoder = new SimpleXMLDecoder(true);

????????????var resultObj:Object = decoder.decodeXML(xmlDoc);

????????????var ac:ArrayCollection =new ArrayCollection(Array(resultObj.root.list.source.item));

????????????return ac;

}

private function objectToXML(obj:Object):XML {

????????????var qName:QName = new QName(”root”);

????????????var xmlDocument:XMLDocument = new XMLDocument();

????????????var simpleXMLEncoder:SimpleXMLEncoder = new SimpleXMLEncoder(xmlDocument);

????????????var xmlNode:XMLNode = simpleXMLEncoder.encodeValue(obj,qName,xmlDocument);

????????????var xml:XML = new XML(xmlDocument.toString());

????????????return xml;

private function objectToArrayCollection(obj:Object):ArrayCollection {

????????????var ac:ArrayCollection =??new ArrayCollection(obj as Array);

private function arrayCollectionToXML(ac:ArrayCollection):XML{

var xml:XML = objectToXML(ac);

return xml;

private function init():void{

??var arr:Array = new Array();

??arr.push({data:0,name:’deva’});

??arr.push({data:1,name:’raj’});

??var ac:ArrayCollection = new ArrayCollection(arr);

??var xml:XML = arrayCollectionToXML(ac);

var newAc:ArrayCollection = xmlToArrayCollection(xml);

trace(newAc[0][0].name);

private function objToStr(value:Object,indent:int =0,

?????????????????????????????????????????refs:Dictionary= null,204)">?????????????????????????????????????????namespaceURIs:Array = null,204)">?????????????????????????????????????????exclude:Array = null):String{

var str:String;

var refCount:int = 0;

if (value is Date)

????????????{

????????????????return value.toString();

????????????}

????????????else if (value is XMLNode)

????????????else if (value is Class)

????????????????return “(” + getQualifiedClassName(value) + “)”;

????????????else

????????????????var classInfo:Object = ObjectUtil.getClassInfo(value,exclude,204)">????????????????????{ includeReadOnly: true,uris: namespaceURIs });

????????????????var properties:Array = classInfo.properties;

????????????????str = “(” + classInfo.name + “)”;

????????????????if (refs == null)

????????????????????refs = new Dictionary(true);

????????????????var id:Object = refs[value];

????????????????if (id != null)

????????????????{

????????????????????str += “#” + int(id);

????????????????????return str;

????????????????}

????????????????if (value != null)

????????????????????str += “#” + refCount.toString();

????????????????????refs[value] = refCount;

????????????????????refCount++;

????????????????var isArray:Boolean = value is Array;

????????????????var isDict:Boolean = value is Dictionary;

????????????????var prop:*;

????????????????indent += 2;

????????????????for (var j:int = 0; j < properties.length; j++)

????????????????????str = newline(str,indent);

????????????????????prop = properties[j];

????????????????????if (isArray)

????????????????????????str += “[";

????????????????????else if (isDict)

????????????????????????str += "{";

????????????????????if (isDict)

????????????????????{

????????????????????????str += objToStr(prop,indent,refs,204)">????????????????????????????????????????????????namespaceURIs,exclude);

????????????????????}

????????????????????else

????????????????????????str += prop.toString();

????????????????????????str += "] “;

????????????????????????str += “} = “;

????????????????????????str += ” = “;

????????????????????try

????????????????????????str += objToStr(value[prop],204)">????????????????????catch(e:Error)

????????????????????????str += “?”;

????????????????indent -= 2;

????????????????return str;

private static function newline(str:String,n:int = 0):String

???{

???????var result:String = str;

???????result += “n”;

???????for (var i:int = 0; i < n; i++)

???????{

???????????result += ” “;

???????}

???????return result;

???}

/* General function for Conversion (thanks,Krystian Bień)

?public function xmlToArrayCollection(xml:XML):ArrayCollection{

????????????var temp:String = ‘<items>’ + xml.toString() + ‘</items>’;

????????????xml = XML(temp);

????????????var decoder:SimpleXMLDecoder = new SimpleXMLDecoder(true);

????????????var ac:ArrayCollection;

????????????ac = new ArrayCollection();

????????????ac.addItem(resultObj.items);

????????????return ac;???????????????

????????}*/

转载：http://blog.163.com/qilin_87/blog/static/1014042062011715043133/