net/systemeD/halcyon/connection/XMLConnection.as

   1 package net.systemeD.halcyon.connection {
   2
   3     import flash.events.Event;
   4     import flash.net.URLLoader;
   5     import flash.net.URLRequest;
   6
   7         import flash.system.Security;
   8         import flash.net.*;
   9
  10
  11         public class XMLConnection extends Connection {
  12
  13         public var readConnection:NetConnection;
  14
  15                 public function XMLConnection() {
  16
  17                         if (Connection.policyURL!='')
  18                 Security.loadPolicyFile(Connection.policyURL);
  19
  20                         readConnection=new NetConnection();
  21                         readConnection.objectEncoding = flash.net.ObjectEncoding.AMF0;
  22                         readConnection.connect(Connection.apiBaseURL+"amf/read");
  23
  24                 }
  25
  26                 override public function getEnvironment(responder:Responder):void {
  27                         readConnection.call("getpresets",responder,"en");
  28                 }
  29
  30                 override public function loadBbox(left:Number,right:Number,
  31                                                                 top:Number,bottom:Number):void {
  32             var mapVars:URLVariables = new URLVariables();
  33             mapVars.bbox= left+","+bottom+","+right+","+top;
  34
  35             var mapRequest:URLRequest = new URLRequest(Connection.apiBaseURL+"map");
  36             mapRequest.data = mapVars;
  37
  38             var mapLoader:URLLoader = new URLLoader();
  39             mapLoader.addEventListener(Event.COMPLETE, loadedMap);
  40             mapLoader.load(mapRequest);
  41             dispatchEvent(new Event(LOAD_STARTED));
  42                 }
  43
  44         private function parseTags(tagElements:XMLList):Object {
  45             var tags:Object = {};
  46             for each (var tagEl:XML in tagElements)
  47                 tags[tagEl.@k] = tagEl.@v;
  48             return tags;
  49         }
  50
  51         private function loadedMap(event:Event):void {
  52             dispatchEvent(new Event(LOAD_COMPLETED));
  53
  54             var map:XML = new XML(URLLoader(event.target).data);
  55             var id:Number;
  56             var version:uint;
  57             var tags:Object;
  58
  59             for each(var nodeData:XML in map.node) {
  60                 id = Number(nodeData.@id);
  61                 version = uint(nodeData.@version);
  62
  63                 var node:Node = getNode(id);
  64                 if ( node == null ) {
  65                     var lat:Number = Number(nodeData.@lat);
  66                     var lon:Number = Number(nodeData.@lon);
  67                     tags = parseTags(nodeData.tag);
  68                     setNode(new Node(id, version, tags, lat, lon));
  69                 }
  70             }
  71
  72             for each(var data:XML in map.way) {
  73                 id = Number(data.@id);
  74                 version = uint(data.@version);
  75
  76                 var way:Way = getWay(id);
  77                 if ( way == null ) {
  78                     var nodes:Array = [];
  79                     for each(var nd:XML in data.nd)
  80                         nodes.push(getNode(Number(nd.@ref)));
  81                     tags = parseTags(data.tag);
  82                     setWay(new Way(id, version, tags, nodes));
  83                 }
  84             }
  85         }
  86
  87         }
  88 }