net/systemeD/halcyon/mapfeatures/MapFeatures.as

   1 package net.systemeD.halcyon.mapfeatures {
   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     import net.systemeD.halcyon.connection.*;
  11
  12
  13         public class MapFeatures {
  14         private static var instance:MapFeatures;
  15
  16         public static function getInstance():MapFeatures {
  17             if ( instance == null ) {
  18                 instance = new MapFeatures();
  19                 instance.loadFeatures();
  20             }
  21             return instance;
  22         }
  23
  24
  25
  26         private var xml:XML = null;
  27
  28         protected function loadFeatures():void {
  29             var request:URLRequest = new URLRequest("map_features.xml");
  30             var loader:URLLoader = new URLLoader();
  31             loader.addEventListener(Event.COMPLETE, onFeatureLoad);
  32             loader.load(request);
  33         }
  34
  35         private function onFeatureLoad(event:Event):void {
  36             xml = new XML(URLLoader(event.target).data);
  37         }
  38
  39         public function hasLoaded():Boolean {
  40             return xml != null;
  41         }
  42
  43         public function findMatchingFeature(entity:Entity):XML {
  44             if ( xml == null )
  45                 return null;
  46
  47             for each(var feature:XML in xml.feature) {
  48                 // check for matching tags
  49                 var match:Boolean = true;
  50                 for each(var tag:XML in feature.tag) {
  51                     var entityTag:String = entity.getTag(tag.@k);
  52                     match = entityTag == tag.@v || (entityTag != null && tag.@v == "*");
  53                     if ( !match ) break;
  54                 }
  55                 if ( match )
  56                     return feature;
  57             }
  58             return null;
  59         }
  60     }
  61
  62 }
  63
  64